PMEBX Putnam Michigan Tax Exempt Class B Shares

Putnam Michigan
Tax Exempt
Income Fund

Semiannual report
11 | 30 | 12

Consider these risks before investing: Investments in a single state carry risks of vulnerability to common economic forces and other factors affecting the state’s tax-exempt investments, which may result in greater losses and volatility. Capital gains, if any, are taxable for federal and, in most cases, state purposes. For some investors, investment income may be subject to the federal alternative minimum tax. Bond investments are subject to interest-rate risk, which means the prices of the fund’s bond investments are likely to fall if interest rates rise. Bond investments also are subject to credit risk, which is the risk that the issuer of the bond may default on payment of interest or principal. Interest-rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds, which may be considered speculative. Unlike bonds, funds that invest in bonds have ongoing fees and expenses. Since the fund invests in tax-exempt bonds, which, to be treated as tax-exempt under the Internal Revenue Code, may be issued only by limited types of issuers for limited types of projects, the fund’s investments may be focused in certain market segments. Consequently, the fund may be more vulnerable to fluctuations in the values of the securities it holds than a fund that invests more broadly. The prices of bonds in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific issuer.

Message from the Trustees

Dear Fellow Shareholder:

In recent months, Europe’s sovereign debt crisis and the threat of the “fiscal cliff” in the United States have contributed to heightened market volatility and have curtailed economic growth.

Even with these challenges, the U.S. economy has exhibited resiliency, with employment, housing, and GDP data all improving. While most of Europe is mired in recession, slow but steady progress is being made to resolve the eurozone’s years-long debt crisis. Meanwhile, China, the world’s second-largest economy, is showing strength in its important manufacturing sector.

Putnam’s portfolio managers and analysts are trained to look for opportunities and manage downside risk in volatile market environments. We also believe in the importance of relying on the expertise of a financial advisor as you work toward your long-term financial goals.

We would like to take this opportunity to announce the arrival of two new Trustees, Liaquat Ahamed and Katinka Domotorffy, CFA, to your fund’s Board of Trustees. Mr. Ahamed, who in 2010 won the Pulitzer Prize for History with his book, Lords of Finance: The Bankers Who Broke the World , also serves on the Board of Aspen Insurance and the Board of the Rohatyn Group, an emerging-market fund complex that manages money for institutional investors.

Ms. Domotorffy, who until year-end 2011 was a Partner, Chief Investment Officer, and Global Head of Quantitative Investment Strategies at Goldman Sachs Asset Management, currently serves as a member of the Anne Ray Charitable Trust’s Investment Committee, Margaret A. Cargill Philanthropies, and director for Reach Out and Read of Greater New York, an organization dedicated to promoting early childhood literacy.

We would also like to extend a welcome to new shareholders of the fund and to thank all of our investors for your continued confidence in Putnam.

About the fund

Seeking a high level of tax-free income for Michigan investors

Municipal bonds can help investors keep more of their investment income while also financing important public projects such as schools, roads, and hospitals. Municipal bonds are typically issued by states and local municipalities to raise funds for building and maintaining public facilities, and they offer income that is generally exempt from federal, state, and local income tax.

Putnam Michigan Tax Exempt Income Fund seeks to capitalize on investment opportunities in Michigan by investing in bonds across a range of sectors. The fund also combines bonds of differing credit quality to increase income potential. In addition to investing in high-quality bonds, the fund’s managers allocate a smaller portion of the portfolio to lower-rated bonds, which may offer higher income in return for more risk.

When deciding whether to invest in a bond, the fund’s managers consider the risks involved — including credit risk, interest-rate risk, and the risk that the bond will be prepaid.

The managers are backed by the resources of Putnam’s fixed-income organization, in which municipal bond analysts are grouped into sector teams and conduct ongoing, rigorous research. Once a bond has been purchased, the managers continue to monitor developments that may affect the bond market, the sector, and the issuer of the bond.

The goal of this in-depth research and active management is to stay a step ahead of the market and pinpoint opportunities for investors.

Understanding tax-equivalent yield

To understand the value of tax-free income, it is helpful to compare a municipal bond’s yield with the “tax- equivalent yield” — the before-tax yield that must be offered by a taxable bond in order to equal the municipal bond’s yield after taxes.

How to calculate tax-equivalent yield:

The tax-equivalent yield equals the municipal bond’s yield divided by “one minus the tax rate.” For example, if a municipal bond’s yield is 5%, then its tax-equivalent yield is 7.7%, assuming the maximum 35% federal tax rate for 2012.

Results for investors subject to lower tax rates would not be as advantageous.

Current performance may be lower or higher than the quoted past performance, which cannot guarantee future results. Share price, principal value, and return will fluctuate, and you may have a gain or a loss when you sell your shares. Performance of class A shares assumes reinvestment of distributions and does not account for taxes. Fund returns in the bar chart do not reflect a sales charge of 4.00%; had they, returns would have been lower. See pages 5 and 10–12 for additional performance information. For a portion of the periods, the fund had expense limitations, without which returns would have been lower. To obtain the most recent month-end performance, visit putnam.com.

* Returns for the six-month period are not annualized, but cumulative.

Interview with your fund’s portfolio manager

Putnam Michigan Tax Exempt Income Fund posted gains during the first half of its fiscal year. How would you describe the investment environment?

The past six months marked a solid period for both municipal bonds and the fund. For much of the period, investors focused on the possibility of a deteriorating situation in the European sovereign debt markets and a slowing economy in the United States. As we approached the end of 2012, European debt concerns took a backseat to the approaching “fiscal cliff” in the United States: the $1.2 trillion in tax increases and spending cuts slated to begin taking effect in January. With potential changes to the tax treatment of municipal bonds a concern for many investors, municipal bonds sold off in December, although performance for the period on the whole was solid.

Also affecting performance was the introduction in September 2012 of a third round of bond buying by the U.S. Federal Reserve — known as “QE3” — which kept downward pressure on longer-dated bonds, benefiting bond markets in general. Technical factors were also a tailwind for investors, as strong market demand continued to outpace supply, particularly since many municipal issuers have been taking advantage of today’s low prevailing interest rates by refunding existing debt.

Against this backdrop, tax-exempt bonds posted solid returns and outpaced the broad

This comparison shows your fund’s performance in the context of broad market indexes for the six months ended 11/30/12. See pages 4 and 10–12 for additional fund performance information. Index descriptions can be found on pages 15–16.

taxable bond market, as measured by the Barclays U.S. Aggregate Bond Index. However, the fund did trail both its benchmark and the average return of its Lipper peer group during the past six months.

What has the default picture looked like in the municipal bond market?

Bankruptcy filings continued to capture headlines during the past six months, with three California cities — Mammoth Lakes, San Bernardino, and Stockton — all filing for protection. While these developments captured national media attention, it’s important to put them in context for Michigan investors. Through the end of November 2012, $4.1 billion of the $3.7 trillion municipal bond market had defaulted, representing about 0.11% of the overall market. On an annualized basis, this figure is in line with the 10-year average annual default rate, and represents a marked decline from 2011’s annual cumulative default rate. Looking ahead, we believe defaults are likely to remain in line with historical averages. That said, we also believe it’s likely that certain cities or counties will continue to capture headlines as we begin 2013; some municipalities are continuing to work to find their fiscal footing, and additional bankruptcy filings are certainly a possibility.

What effect have tax policy changes had on the municipal bond market?

All eyes were on Washington, D.C., as we closed out 2012 and legislators attempted to craft a deal to avoid the automatic spending cuts and tax increases that represent the fiscal cliff. On January 1, Congress passed a bill that brought some temporary clarity to the tax landscape and delayed the automatic spending cuts for another two months.

On the revenue side, the top federal income tax rates for individuals earning more than $400,000 and couples earning more than

Allocations are represented as a percentage of the fund’s net assets. Summary information may differ from the information in the portfolio schedule notes included in the financial statements due to the inclusion of derivative securities, any interest accruals, the exclusion of as-of trades, if any, and the use of different classifications of securities for presentation purposes. Holdings and allocations may vary over time.

$450,000 will rise to 39.6% for tax year 2013. The “payroll tax holiday,” which had been in effect for two years, will expire, and all workers subject to the tax will see payroll tax rates return to 6.2% from the current 4.2%. In addition, taxpayers with incomes above $400,000 — $450,000 for those married filing jointly — are subject to a 20% tax rate on long-term capital gains and qualified dividends, up from 15%. Once the new Medicare net investment income surtax is factored in, the effective tax rate is 23.8%. The Act also phases out certain itemized deductions and personal exemptions for taxpayers with incomes above $250,000, but these provisions do not limit the exemption on municipal bond interest. The top tax rate for upper-income municipal bond investors is expected to rise to 43.4%, from 35% last year, based on the new top income tax rate of 39.6% plus the 3.8% Medicare tax on net investment income and capital gains. For the time being, there are no changes planned for the tax treatment of municipal bonds, but changes could be part of a broader tax reform in the future.

The key takeaway is that higher income earners will face higher tax burdens next year, and while broader tax reform is still a possibility, for the time being tax rates are now a known entity. It’s hard to predict whether changes to the tax exemption of municipal bonds will reenter negotiations over the coming months, but the current tax changes will likely make municipal bonds’ tax-free income attractive as part of a well-diversified portfolio.

Credit qualities are shown as a percentage of portfolio market value as of 11/30/12. A bond rated Baa or higher (MIG3/VMIG3 or higher, for short-term debt) is considered investment grade. The chart reflects Moody’s ratings; percentages may include bonds or derivatives not rated by Moody’s but rated by Standard & Poor’s (S&P) or, if unrated by S&P, by Fitch Ratings, and then included in the closest equivalent Moody’s rating. Ratings will vary over time. Credit qualities are included for portfolio securities and are not included for derivative instruments and cash. The fund itself has not been rated by an independent rating agency.

How are states’ finances faring today?

We have seen improvement across the board. For fiscal year 2013, 48 states, including Michigan, are projecting increased tax revenues versus those of 2012 according to the National Conference of State Legislators, and certainly that is an encouraging trend. That said, stressors continue to exist at the local level, where many states have lowered expenses by reducing their financial support. Moreover, should the economy begin to decelerate and growth begin to stall, which is a distinct possibility in the first half of 2013, that would almost certainly negatively affect municipal finances, we believe. With this in mind, we maintain a cautious view on the outlook for local general obligation bonds [G.O.s] overall, and remain underweight.

How did you position the portfolio?

We sought to benefit from improving fundamentals in the municipal bond market. While we believed that the budget challenges faced by many municipalities were significant, we were confident that conditions would improve as long as the broad economy did not stall. Against this backdrop, we believed that essential service revenue bonds continued to be attractive, while we remained highly selective regarding the fund’s positioning in local G.O.s, which are securities issued at the city or county level. As the federal government looks to reduce transfer payments to the states, we believe that these types of bonds are at risk for downgrades or other headline-driven price volatility. And unlike state general obligation bonds, local G.O.s rely more on property tax revenue than on income or sales taxes. With real-estate prices still under pressure in many markets, property taxes have been slower to recover than other tax sources.

From a credit perspective, we held overweight positions in Baa-rated securities versus the fund’s benchmark. In terms of sectors, relative

This chart shows how the fund’s top weightings have changed over the past six months. Allocations are represented as a percentage of the fund’s net assets. Current period summary information may differ from the information in the portfolio schedule notes included in the financial statements due to the inclusion of derivative securities, any interest accruals, the exclusion of as-of trades, if any, and the use of different classifications of securities for presentation purposes. Holdings and allocations may vary over time.

to the benchmark index, we favored higher education, utility, and health-care bonds, including those of hospitals and continuing-care retirement communities. Overall, this positioning generally helped the fund’s relative performance during its reporting period. On the other hand, our slight short-duration positioning was an overall detractor from performance relative to our Lipper peers. Also, an underweight position in non-rated municipal bonds hampered relative performance for the fund.

What is your outlook?

We continue to be optimistic on the outlook for municipal bonds, given solid market technicals, and maintain our overweight position in essential-service revenue bonds. While spreads — the difference in yield between municipal bonds and Treasuries — are much narrower than they were at their peak, they remain attractive, in our opinion. Technical factors in the market have been positive — specifically, higher refunding activity and strong investor demand. While investors now have more near-term certainty on tax rates for 2013, there is still much to be resolved, including sequestration, the debt ceiling, and the potential for broader tax reform during the year, all of which could impact the value of municipal bonds. As always, we are monitoring the situation closely and positioning the fund accordingly.

Thank you, Thalia, for your time and insights today.

The views expressed in this report are exclusively those of Putnam Management and are subject to change. They are not meant as investment advice.

Please note that the holdings discussed in this report may not have been held by the fund for the entire period. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk.

Portfolio Manager Thalia Meehan holds a B.A. from Williams College. A CFA charterholder, Thalia joined Putnam in 1989 and has been in the investment industry since 1983.

In addition to Thalia, your fund’s portfolio managers are Paul M. Drury, CFA, and Susan A. McCormack, CFA.

IN THE NEWS

While the U.S. economy continues to gather strength in several key areas, estimates for overall global economic growth in 2012 and 2013 have been downgraded. The Organisation for Economic Co-operation and Development (OECD) revised its global GDP projections from 3.4% to 2.9% for 2012 and from 4.2% to 3.4% for 2013. The primary barriers to growth include the eurozone’s debt crisis and, to a lesser degree, the impending U.S. “fiscal cliff.” For the eurozone, the Paris-based think tank predicts negative growth of –0.4% in 2012 and –0.1% in 2013, before climbing to a tepid 1.3% in 2014. U.S. GDP growth may be significantly better, however: 2.2% for 2012, slowing to 2% in 2013, before increasing to 2.8% in 2014, according to the OECD.

Your fund’s performance

This section shows your fund’s performance, price, and distribution information for periods ended November 30, 2012, the end of the first half of its current fiscal year. In accordance with regulatory requirements for mutual funds, we also include performance information as of the most recent calendar quarter-end and expense information taken from the fund’s current prospectus. Performance should always be considered in light of a fund’s investment strategy. Data represent past performance. Past performance does not guarantee future results. More recent returns may be less or more than those shown. Investment return and principal value will fluctuate, and you may have a gain or a loss when you sell your shares. Performance information does not reflect any deduction for taxes a shareholder may owe on fund distributions or on the redemption of fund shares. For the most recent month-end performance, please visit the Individual Investors section at putnam.com or call Putnam at 1-800-225-1581. Class Y shares are not available to all investors. See the Terms and Definitions section in this report for definitions of the share classes offered by your fund.

Fund performance Total return for periods ended 11/30/12

Current performance may be lower or higher than the quoted past performance, which cannot guarantee future results. After-sales-charge returns for class A and M shares reflect the deduction of the maximum 4.00% and 3.25% sales charge, respectively, levied at the time of purchase. Class B share returns after contingent deferred sales charge (CDSC) reflect the applicable CDSC, which is 5% in the first year, declining over time to 1% in the sixth year, and is eliminated thereafter. Class C share returns after CDSC reflect a 1% CDSC for the first year that is eliminated thereafter. Class Y shares have no initial sales charge or CDSC. Performance for class B, C, M, and Y shares before their inception is derived from the historical performance of class A shares, adjusted for the applicable sales charge (or CDSC) and the higher operating expenses for such shares, except for class Y shares, for which 12b-1 fees are not applicable.

Class B share performance does not reflect conversion to class A shares.

For a portion of the periods, the fund had expense limitations, without which returns would have been lower.

Fund price and distribution information For the six-month period ended 11/30/12

The classification of distributions, if any, is an estimate. Before-sales-charge share value and current dividend rate for class A and M shares, if applicable, do not take into account any sales charge levied at the time of purchase. After-sales-charge share value, current dividend rate, and current 30-day SEC yield, if applicable, are calculated assuming that the maximum sales charge (4.00% for class A shares and 3.25% for class M shares) was levied at the time of purchase. Final distribution information will appear on your year-end tax forms.

¹ For some investors, investment income may be subject to the federal alternative minimum tax.

² Capital gains, if any, are taxable for federal and, in most cases, state purposes.

³ Most recent distribution, excluding capital gains, annualized and divided by share price before or after sales charge at period-end.

⁴ Assumes maximum 37.83% federal and state combined tax rate for 2012. Results for investors subject to lower tax rates would not be as advantageous.

⁵ Based only on investment income and calculated using the maximum offering price for each share class, in accordance with SEC guidelines.

Comparative index returns For periods ended 11/30/12

Index and Lipper results should be compared with fund performance before sales charge, before CDSC, or at net asset value.

* Over the 6-month, 1-year, 3-year, 5-year, 10-year, and life-of-fund periods ended 11/30/12, there were 22, 22, 21, 19, 15, and 5 funds, respectively, in this Lipper category.

Fund performance as of most recent calendar quarter
Total return for periods ended 12/31/12

Your fund’s expenses

As a mutual fund investor, you pay ongoing expenses, such as management fees, distribution fees (12b-1 fees), and other expenses. Using the following information, you can estimate how these expenses affect your investment and compare them with the expenses of other funds. You may also pay one-time transaction expenses, including sales charges (loads) and redemption fees, which are not shown in this section and would have resulted in higher total expenses. For more information, see your fund’s prospectus or talk to your financial representative.

Fiscal-year expense information in this table is taken from the most recent prospectus, is subject to change, and may differ from that shown for the annualized expense ratio and in the financial highlights of this report. Expenses are shown as a percentage of average net assets.

* Expenses for each share class are calculated using the fund’s annualized expense ratio for each class, which represents the ongoing expenses as a percentage of average net assets for the six months ended 11/30/12. The expense ratio may differ for each share class.

† Expenses are calculated by multiplying the expense ratio by the average account value for the period; then multiplying the result by the number of days in the period; and then dividing that result by the number of days in the year.

Estimate the expenses you paid

To estimate the ongoing expenses you paid for the six months ended November 30, 2012, use the following calculation method. To find the value of your investment on June 1, 2012, call Putnam at 1-800-225-1581.

Compare expenses using the SEC’s method

The Securities and Exchange Commission (SEC) has established guidelines to help investors assess fund expenses. Per these guidelines, the following table shows your fund’s expenses based on a $1,000 investment, assuming a hypothetical 5% annualized return . You can use this information to compare the ongoing expenses (but not transaction expenses or total costs) of investing in the fund with those of other funds. All mutual fund shareholder reports will provide this information to help you make this comparison. Please note that you cannot use this information to estimate your actual ending account balance and expenses paid during the period.

* Expenses for each share class are calculated using the fund’s annualized expense ratio for each class, which represents the ongoing expenses as a percentage of average net assets for the six months ended 11/30/12. The expense ratio may differ for each share class.

† Expenses are calculated by multiplying the expense ratio by the average account value for the period; then multiplying the result by the number of days in the period; and then dividing that result by the number of days in the year.

Terms and definitions

Important terms

Total return shows how the value of the fund’s shares changed over time, assuming you held the shares through the entire period and reinvested all distributions in the fund.

Before sales charge , or net asset value, is the price, or value, of one share of a mutual fund, without a sales charge. Before-sales-charge figures fluctuate with market conditions, and are calculated by dividing the net assets of each class of shares by the number of outstanding shares in the class.

After sales charge is the price of a mutual fund share plus the maximum sales charge levied at the time of purchase. After-sales-charge performance figures shown here assume the 4.00% maximum sales charge for class A shares and 3.25% for class M shares.

Contingent deferred sales charge (CDSC) is generally a charge applied at the time of the redemption of class B or C shares and assumes redemption at the end of the period. Your fund’s class B CDSC declines over time from a 5% maximum during the first year to 1% during the sixth year. After the sixth year, the CDSC no longer applies. The CDSC for class C shares is 1% for one year after purchase.

Share classes

Class A shares are generally subject to an initial sales charge and no CDSC (except on certain redemptions of shares bought without an initial sales charge).

Class B shares are not subject to an initial sales charge. They may be subject to a CDSC.

Class C shares are not subject to an initial sales charge and are subject to a CDSC only if the shares are redeemed during the first year.

Class M shares have a lower initial sales charge and a higher 12b-1 fee than class A shares and no CDSC.

Class Y shares are not subject to an initial sales charge or CDSC, and carry no 12b-1 fee. They are generally only available to corporate and institutional clients and clients in other approved programs.

Fixed-income terms

Current yield is the annual rate of return earned from dividends or interest of an investment. Current yield is expressed as a percentage of the price of a security, fund share, or principal investment.

Yield curve is a graph that plots the yields of bonds with equal credit quality against their differing maturity dates, ranging from shortest to longest. It is used as a benchmark for other debt, such as mortgage or bank lending rates.

Comparative indexes

Barclays Municipal Bond Index is an unmanaged index of long-term fixed-rate investment-grade tax-exempt bonds.

Barclays U.S. Aggregate Bond Index is an unmanaged index of U.S. investment-grade fixed-income securities.

BofA (Bank of America) Merrill Lynch U.S. 3-Month Treasury Bill Index is an unmanaged index that seeks to measure the performance of U.S. Treasury bills available in the marketplace.

S&P 500 Index is an unmanaged index of common stock performance.

Indexes assume reinvestment of all distributions and do not account for fees. Securities and performance of a fund and an index will differ. You cannot invest directly in an index.

Lipper is a third-party industry-ranking entity that ranks mutual funds. Its rankings do not reflect sales charges. Lipper rankings are based on total return at net asset value relative to other funds that have similar current investment styles or objectives as determined by Lipper. Lipper may change a fund’s category assignment at its discretion. Lipper category averages reflect performance trends for funds within a category.

Other information for shareholders

Important notice regarding delivery of shareholder documents

In accordance with Securities and Exchange Commission (SEC) regulations, Putnam sends a single copy of annual and semiannual shareholder reports, prospectuses, and proxy statements to Putnam shareholders who share the same address, unless a shareholder requests otherwise. If you prefer to receive your own copy of these documents, please call Putnam at 1-800-225-1581, and Putnam will begin sending individual copies within 30 days.

Proxy voting

Putnam is committed to managing our mutual funds in the best interests of our shareholders. The Putnam funds’ proxy voting guidelines and procedures, as well as information regarding how your fund voted proxies relating to portfolio securities during the 12-month period ended June 30, 2012, are available in the Individual Investors section of putnam.com, and on the SEC’s website, www.sec.gov. If you have questions about finding forms on the SEC’s website, you may call the SEC at 1-800-SEC-0330. You may also obtain the Putnam funds’ proxy voting guidelines and procedures at no charge by calling Putnam’s Shareholder Services at 1-800-225-1581.

Fund portfolio holdings

The fund will file a complete schedule of its portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-Q. Shareholders may obtain the fund’s Forms N-Q on the SEC’s website at www.sec.gov. In addition, the fund’s Forms N-Q may be reviewed and copied at the SEC’s Public Reference Room in Washington, D.C. You may call the SEC at 1-800-SEC-0330 for information about the SEC’s website or the operation of the Public Reference Room.

Trustee and employee fund ownership

Putnam employees and members of the Board of Trustees place their faith, confidence, and, most importantly, investment dollars in Putnam mutual funds. As of November 30, 2012, Putnam employees had approximately $340,000,000 and the Trustees had approximately $83,000,000 invested in Putnam mutual funds. These amounts include investments by the Trustees’ and employees’ immediate family members as well as investments through retirement and deferred compensation plans.

Trustee approval of management contract

General conclusions

The Board of Trustees of the Putnam funds oversees the management of each fund and, as required by law, determines annually whether to approve the continuance of your fund’s management contract with Putnam Investment Management (“Putnam Management”) and the sub-management contract with respect to your fund between Putnam Management and its affiliate, Putnam Investments Limited (“PIL”).

The Board of Trustees, with the assistance of its Contract Committee, requests and evaluates all information it deems reasonably necessary under the circumstances in connection with its annual contract review. The Contract Committee consists solely of Trustees who are not “interested persons” (as this term is defined in the Investment Company Act of 1940, as amended (the “1940 Act”)) of the Putnam funds (“Independent Trustees”).

At the outset of the review process, members of the Board’s independent staff and independent legal counsel met with representatives of Putnam Management to review the annual contract review materials furnished to the Contract Committee during the course of the previous year’s review and to discuss possible changes in these materials that might be necessary or desirable for the coming year. Following these discussions and in consultation with the Contract Committee, the Independent Trustees’ independent legal counsel requested that Putnam Management furnish specified information, together with any additional information that Putnam Management considered relevant, to the Contract Committee. Over the course of several months ending in June 2012, the Contract Committee met on a number of occasions with representatives of Putnam Management, and separately in executive session, to consider the information that Putnam Management provided. Throughout this process, the Contract Committee was assisted by the members of the Board’s independent staff and by independent legal counsel for the Putnam funds and the Independent Trustees.

In May 2012, the Contract Committee met in executive session with the other Independent Trustees to discuss the Contract Committee’s preliminary recommendations with respect to the continuance of the contracts. At the Trustees’ June 22, 2012 meeting, the Contract Committee met in executive session with the other Independent Trustees to review a summary of the key financial data that the Contract Committee considered in the course of its review. The Contract Committee then presented its written report, which summarized the key factors that the Committee had considered and set forth its final recommendations. The Contract Committee then recommended, and the Independent Trustees approved, the continuance of your fund’s management and sub-management contracts, effective July 1, 2012. (Because PIL is an affiliate of Putnam Management and Putnam Management remains fully responsible for all services provided by PIL, the Trustees have not evaluated PIL as a separate entity, and all subsequent references to Putnam Management below should be deemed to include reference to PIL as necessary or appropriate in the context.)

The Independent Trustees’ approval was based on the following conclusions:

• That the fee schedule in effect for your fund represented reasonable compensation in light of the nature and quality of the services being provided to the fund, the fees paid by competitive funds, and the costs incurred by Putnam Management in providing services, and

• That the fee schedule represented an appropriate sharing between fund shareholders and Putnam Management of such economies of

scale as may exist in the management of the fund at current asset levels.

These conclusions were based on a comprehensive consideration of all information provided to the Trustees and were not the result of any single factor. Some of the factors that figured particularly in the Trustees’ deliberations and how the Trustees considered these factors are described below, although individual Trustees may have evaluated the information presented differently, giving different weights to various factors. It is also important to recognize that the management arrangements for your fund and the other Putnam funds are the result of many years of review and discussion between the Independent Trustees and Putnam Management, that some aspects of the arrangements may receive greater scrutiny in some years than others, and that the Trustees’ conclusions may be based, in part, on their consideration of fee arrangements in previous years.

Management fee schedules and total expenses

The Trustees reviewed the management fee schedules in effect for all Putnam funds, including fee levels and breakpoints. In reviewing management fees, the Trustees generally focus their attention on material changes in circumstances — for example, changes in assets under management, changes in a fund’s investment style, changes in Putnam Management’s operating costs, or changes in competitive practices in the mutual fund industry — that suggest that consideration of fee changes might be warranted. The Trustees concluded that the circumstances did not warrant changes to the management fee structure of your fund.

Most of the open-end Putnam funds, including your fund, have relatively new management contracts, which introduced fee schedules that reflect more competitive fee levels for many funds, complex-wide breakpoints for the open-end funds, and performance fees for some funds. These new management contracts have been in effect for two years — since January or, for a few funds, February 2010. The Trustees approved the new management contracts on July 10, 2009, and fund shareholders subsequently approved the contracts by overwhelming majorities of the shares voted.

Under its management contract, your fund has the benefit of breakpoints in its management fee that provide shareholders with significant economies of scale in the form of reduced fee levels as assets under management in the Putnam family of funds increase. The Contract Committee observed that the complex-wide breakpoints of the open-end funds had only been in place for two years, and the Trustees will continue to examine the operation of this new breakpoint structure in future years in light of further experience.

As in the past, the Trustees also focused on the competitiveness of each fund’s total expense ratio. In order to ensure that expenses of the Putnam funds continue to meet evolving competitive standards, the Trustees and Putnam Management agreed in 2009 to implement certain expense limitations. These expense limitations serve in particular to maintain competitive expense levels for funds with large numbers of small shareholder accounts and funds with relatively small net assets. Most funds, including your fund, had sufficiently low expenses that these expense limitations did not apply. The expense limitations were: (i) a contractual expense limitation applicable to all retail open-end funds of 37.5 basis points (effective March 1, 2012, this expense limitation was reduced to 32 basis points) on investor servicing fees and expenses and (ii) a contractual expense limitation applicable to all open-end funds of 20 basis points on so-called “other expenses” (i.e., all expenses exclusive of management fees, investor servicing fees, distribution fees, investment-related expenses, interest, taxes, brokerage commissions,

extraordinary expenses and acquired fund fees and expenses). Putnam Management’s support for these expense limitations, including its agreement to reduce the expense limitation applicable to the open-end funds’ investor servicing fees and expenses as noted above, was an important factor in the Trustees’ decision to approve the continuance of your fund’s management and sub-management contracts.

The Trustees reviewed comparative fee and expense information for a custom group of competitive funds selected by Lipper Inc. This comparative information included your fund’s percentile ranking for effective management fees and total expenses (excluding any applicable 12b-1 fee), which provides a general indication of your fund’s relative standing. In the custom peer group, your fund ranked in the 1st quintile in effective management fees (determined for your fund and the other funds in the custom peer group based on fund asset size and the applicable contractual management fee schedule) and in the 3rd quintile in total expenses (excluding any applicable 12b-1 fees) as of December 31, 2011 (the first quintile representing the least expensive funds and the fifth quintile the most expensive funds). The fee and expense data reported by Lipper as of December 31, 2011 reflected the most recent fiscal year-end data available in Lipper’s database at that time.

In connection with their review of the management fees and total expenses of the Putnam funds, the Trustees also reviewed the costs of the services provided and the profits realized by Putnam Management and its affiliates from their contractual relationships with the funds. This information included trends in revenues, expenses and profitability of Putnam Management and its affiliates relating to the investment management, investor servicing and distribution services provided to the funds. In this regard, the Trustees also reviewed an analysis of Putnam Management’s revenues, expenses and profitability, allocated on a fund-by-fund basis, with respect to the funds’ management, distribution, and investor servicing contracts. For each fund, the analysis presented information about revenues, expenses and profitability for each of the agreements separately and for the agreements taken together on a combined basis. The Trustees concluded that, at current asset levels, the fee schedules in place represented reasonable compensation for the services being provided and represented an appropriate sharing of such economies of scale as may exist in the management of the funds at that time.

The information examined by the Trustees as part of their annual contract review for the Putnam funds has included for many years information regarding fees charged by Putnam Management and its affiliates to institutional clients such as defined benefit pension plans, college endowments, and the like. This information included comparisons of those fees with fees charged to the funds, as well as an assessment of the differences in the services provided to these different types of clients. The Trustees observed that the differences in fee rates between institutional clients and mutual funds are by no means uniform when examined by individual asset sectors, suggesting that differences in the pricing of investment management services to these types of clients may reflect historical competitive forces operating in separate markets. The Trustees considered the fact that in many cases fee rates across different asset classes are higher on average for mutual funds than for institutional clients, as well as the differences between the services that Putnam Management provides to the Putnam funds and those that it provides to its institutional clients. The Trustees did not rely on these comparisons to any significant extent in concluding that the management fees paid by your fund are reasonable.

Investment performance

The quality of the investment process provided by Putnam Management represented a major factor in the Trustees’ evaluation of the quality of services provided by Putnam Management under your fund’s management contract. The Trustees were assisted in their review of the Putnam funds’ investment process and performance by the work of the investment oversight committees of the Trustees, which meet on a regular basis with the funds’ portfolio teams and with the Chief Investment Officer and other members of Putnam Management’s Investment Division throughout the year. The Trustees concluded that Putnam Management generally provides a high-quality investment process — based on the experience and skills of the individuals assigned to the management of fund portfolios, the resources made available to them, and in general Putnam Management’s ability to attract and retain high-quality personnel — but also recognized that this does not guarantee favorable investment results for every fund in every time period.

The Trustees considered the investment performance of each fund over multiple time periods and considered information comparing each fund’s performance with various benchmarks and, where applicable, with the performance of competitive funds or targeted annualized return. They noted that since 2009, when Putnam Management began implementing major changes to strengthen its investment personnel and processes, there has been a steady improvement in the number of Putnam funds showing above-median three-year performance results. They also noted the disappointing investment performance of some funds for periods ended December 31, 2011 and considered information provided by Putnam Management regarding the factors contributing to the underperformance and actions being taken to improve the performance of these particular funds. The Trustees indicated their intention to continue to monitor performance trends to assess the effectiveness of these efforts and to evaluate whether additional actions to address areas of underperformance are warranted.

In the case of your fund, the Trustees considered that its class A share cumulative total return performance at net asset value was in the following quartiles of its Lipper Inc. peer group (Lipper Michigan Municipal Debt Funds) for the one-year, three-year and five-year periods ended December 31, 2011 (the first quartile representing the best-performing funds and the fourth quartile the worst-performing funds):

Over the one-year, three-year and five-year periods ended December 31, 2011, there were 20, 20 and 18 funds, respectively, in your fund’s Lipper peer group. (When considering performance information, shareholders should be mindful that past performance is not a guarantee of future results.)

Brokerage and soft-dollar allocations; investor servicing

The Trustees considered various potential benefits that Putnam Management may receive in connection with the services it provides under the management contract with your fund. These include benefits related to brokerage allocation and the use of soft dollars, whereby a portion of the commissions paid by a fund for brokerage may be used to acquire research services that are expected to be useful to Putnam Management in managing the assets of the fund and of other clients. Subject to policies established by the Trustees, soft-dollar credits acquired through these means are used primarily to acquire research services that supplement Putnam Management’s internal research efforts. However, the Trustees noted that a portion of available soft-dollar credits

continues to be allocated to the payment of fund expenses. The Trustees indicated their continued intent to monitor regulatory developments in this area with the assistance of their Brokerage Committee and also indicated their continued intent to monitor the potential benefits associated with fund brokerage and soft-dollar allocations and trends in industry practices to ensure that the principle of seeking best price and execution remains paramount in the portfolio trading process.

Putnam Management may also receive benefits from payments that the funds make to Putnam Management’s affiliates for investor or distribution services. In conjunction with the annual review of your fund’s management and sub-management contracts, the Trustees reviewed your fund’s investor servicing agreement with Putnam Investor Services, Inc. (“PSERV”) and its distributor’s contracts and distribution plans with Putnam Retail Management Limited Partnership (“PRM”), both of which are affiliates of Putnam Management. The Trustees concluded that the fees payable by the funds to PSERV and PRM, as applicable, for such services are reasonable in relation to the nature and quality of such services.

Financial statements

These sections of the report, as well as the accompanying Notes, constitute the fund’s financial statements.

The fund’s portfolio lists all the fund’s investments and their values as of the last day of the reporting period. Holdings are organized by asset type and industry sector, country, or state to show areas of concentration and diversification.

Statement of assets and liabilities shows how the fund’s net assets and share price are determined. All investment and non-investment assets are added together. Any unpaid expenses and other liabilities are subtracted from this total. The result is divided by the number of shares to determine the net asset value per share, which is calculated separately for each class of shares. (For funds with preferred shares, the amount subtracted from total assets includes the liquidation preference of preferred shares.)

Statement of operations shows the fund’s net investment gain or loss. This is done by first adding up all the fund’s earnings — from dividends and interest income — and subtracting its operating expenses to determine net investment income (or loss). Then, any net gain or loss the fund realized on the sales of its holdings — as well as any unrealized gains or losses over the period — is added to or subtracted from the net investment result to determine the fund’s net gain or loss for the fiscal period.

Statement of changes in net assets shows how the fund’s net assets were affected by the fund’s net investment gain or loss, by distributions to shareholders, and by changes in the number of the fund’s shares. It lists distributions and their sources (net investment income or realized capital gains) over the current reporting period and the most recent fiscal year-end. The distributions listed here may not match the sources listed in the Statement of operations because the distributions are determined on a tax basis and may be paid in a different period from the one in which they were earned. Dividend sources are estimated at the time of declaration. Actual results may vary. Any non-taxable return of capital cannot be determined until final tax calculations are completed after the end of the fund’s fiscal year.

Financial highlights provide an overview of the fund’s investment results, per-share distributions, expense ratios, net investment income ratios, and portfolio turnover in one summary table, reflecting the five most recent reporting periods. In a semiannual report, the highlights table also includes the current reporting period.

The fund’s portfolio 11/30/12 (Unaudited)

Key to holding’s abbreviations

Notes to the fund’s portfolio

Unless noted otherwise, the notes to the fund’s portfolio are for the close of the fund’s reporting period, which ran from June 1, 2012 through November 30, 2012 (the reporting period). Within the following notes to the portfolio, references to “ASC 820” represent Accounting Standards Codification ASC 820 Fair Value Measurements and Disclosures .

* Percentages indicated are based on net assets of $83,388,868.

** The Moody’s, Standard & Poor’s or Fitch ratings indicated are believed to be the most recent ratings available at the close of the reporting period for the securities listed. Ratings are generally ascribed to securities at the time of issuance. While the agencies may from time to time revise such ratings, they undertake no obligation to do so, and the ratings do not necessarily represent what the agencies would ascribe to these securities at the close of the reporting period. Securities rated by Putnam are indicated by “/P.” Securities rated by Fitch are indicated by “/F.” The rating of an insured security represents what is believed to be the most recent rating of the insurer’s claims-paying ability available at the close of the reporting period, if higher than the rating of the direct issuer of the bond, and does not reflect any subsequent changes. Security ratings are defined in the Statement of Additional Information.

∆ Forward commitment, in part or in entirety (Note 1).

The rates shown on Mandatory Put Bonds are the current interest rates at the close of the reporting period.

The dates shown parenthetically on Mandatory Put Bonds represent the next mandatory put dates.

The dates shown parenthetically on prerefunded bonds represent the next prerefunding dates.

The dates shown on debt obligations are the original maturity dates.

The fund had the following sector concentrations greater than 10% at the close of the reporting period (as a percentage of net assets):

The fund had the following insurance concentrations greater than 10% at the close of the reporting period (as a percentage of net assets):

ASC 820 establishes a three-level hierarchy for disclosure of fair value measurements. The valuation hierarchy is based upon the transparency of inputs to the valuation of the fund’s investments. The three levels are defined as follows:

Level 1: Valuations based on quoted prices for identical securities in active markets.

Level 2: Valuations based on quoted prices in markets that are not active or for which all significant inputs are observable, either directly or indirectly.

Level 3: Valuations based on inputs that are unobservable and significant to the fair value measurement.

The following is a summary of the inputs used to value the fund’s net assets as of the close of the reporting period:

The accompanying notes are an integral part of these financial statements.

Statement of assets and liabilities 11/30/12 (Unaudited)

Statement of operations Six months ended 11/30/12 (Unaudited)

The accompanying notes are an integral part of these financial statements.

Statement of changes in net assets

* Unaudited

The accompanying notes are an integral part of these financial statements.

Financial highlights (For a common share outstanding throughout the period)

See notes to financial highlights at the end of this section.

The accompanying notes are an integral part of these financial statements.

Financial highlights (Continued)

* Not annualized.

** Unaudited.

† For the period January 2, 2008 (commencement of operations) to May 31, 2008.

^a Total return assumes dividend reinvestment and does not reflect the effect of sales charges.

^b Includes amounts paid through expense offset arrangements (Note 2).

^c Reflects an involuntary contractual expense limitation in effect during the period. As a result of such limitation, the expenses of each class, as a percentage of its average net assets, reflect a reduction of the following amounts:

^d Amount represents less than $0.01 per share.

^e Reflects a non-recurring reimbursement related to short-term trading related lawsuits, which amounted to less than $0.01 per share outstanding on May 18, 2011.

^f Reflects a non-recurring reimbursement related to restitution amounts in connection with a distribution plan approved by the Securities and Exchange Commission (SEC) which amounted to less than $0.01 per share outstanding on July 21, 2011 (Note 6).

The accompanying notes are an integral part of these financial statements.

Notes to financial statements 11/30/12 (Unaudited)

Within the following Notes to financial statements, references to “State Street” represent State Street Bank and Trust Company, references to “the SEC” represent the Securities and Exchange Commission and references to “Putnam Management” represent Putnam Investment Management, LLC, the fund’s manager, an indirect wholly-owned subsidiary of Putnam Investments, LLC. Unless otherwise noted, the “reporting period” represents the period from June 1, 2012 through November 30, 2012.

Putnam Michigan Tax Exempt Income Fund (the fund) is a Massachusetts business trust, which is registered under the Investment Company Act of 1940, as amended, as a diversified, open-end management investment company. The investment objective of the fund is to seek as high a level of current income exempt from federal income tax and Michigan personal income tax as Putnam Management believes is consistent with preservation of capital. The fund invests mainly in bonds that pay interest that is exempt from federal income tax and Michigan personal income tax (but that may be subject to federal alternative minimum tax (AMT)), are investment-grade in quality, and have intermediate- to long-term maturities (three years or longer). Putnam Management may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments.

The fund offers class A, class B, class C, class M and class Y shares. Class A and class M shares are sold with a maximum front-end sales charge of 4.00% and 3.25%, respectively, and generally do not pay a contingent deferred sales charge. Class B shares, which convert to class A shares after approximately eight years, do not pay a front-end sales charge and are subject to a contingent deferred sales charge if those shares are redeemed within six years of purchase. Class C shares have a one-year 1.00% contingent deferred sales charge and do not convert to class A shares. The expenses for class A, class B, class C, and class M shares may differ based on the distribution fee of each class, which is identified in Note 2. Class Y shares, which are sold at net asset value, are generally subject to the same expenses as class A, class B, class C, and class M shares, but do not bear a distribution fee. Class Y shares are not available to all investors.

In the normal course of business, the fund enters into contracts that may include agreements to indemnify another party under given circumstances. The fund’s maximum exposure under these arrangements is unknown as this would involve future claims that may be, but have not yet been, made against the fund. However, the fund’s management team expects the risk of material loss to be remote.

a reasonable period of time. By its nature, a fair value price is a good faith estimate of the value of a security in a current sale and does not reflect an actual market price, which may be different by a material amount.

Security transactions and related investment income Security transactions are recorded on the trade date (the date the order to buy or sell is executed). Gains or losses on securities sold are determined on the identified cost basis.

Interest income is recorded on the accrual basis. All premiums/discounts are amortized/accreted on a yield-to-maturity basis. The premium in excess of the call price, if any, is amortized to the call date; thereafter, any remaining premium is amortized to maturity.

Securities purchased or sold on a forward commitment or delayed delivery basis may be settled a month or more after the trade date; interest income is accrued based on the terms of the securities. Losses may arise due to changes in the market value of the underlying securities or if the counterparty does not perform under the contract.

Interfund lending The fund, along with other Putnam funds, may participate in an interfund lending program pursuant to an exemptive order issued by the SEC. This program allows the fund to borrow from other Putnam funds that permit such transactions. Interfund lending transactions are subject to each fund’s investment policies and borrowing and lending limits. Interest earned or paid on the interfund lending transaction will be based on the average of certain current market rates. During the reporting period, the fund did not utilize the program.

Line of credit The fund participates, along with other Putnam funds, in a $315 million unsecured committed line of credit and a $185 million unsecured uncommitted line of credit, both provided by State Street. Borrowings may be made for temporary or emergency purposes, including the funding of shareholder redemption requests and trade settlements. Interest is charged to the fund based on the fund’s borrowing at a rate equal to the Federal Funds rate plus 1.25% for the committed line of credit and the Federal Funds rate plus 1.30% for the uncommitted line of credit. A closing fee equal to 0.02% of the committed line of credit and $50,000 for the uncommitted line of credit has been paid by the participating funds. In addition, a commitment fee of 0.11% per annum on any unutilized portion of the committed line of credit is allocated to the participating funds based on their relative net assets and paid quarterly. During the reporting period, the fund had no borrowings against these arrangements.

Federal taxes It is the policy of the fund to distribute all of its income within the prescribed time period and otherwise comply with the provisions of the Internal Revenue Code of 1986, as amended (the Code), applicable to regulated investment companies. It is also the intention of the fund to distribute an amount sufficient to avoid imposition of any excise tax under Section 4982 of the Code.

The fund is subject to the provisions of Accounting Standards Codification ASC 740 Income Taxes (ASC 740). ASC 740 sets forth a minimum threshold for financial statement recognition of the benefit of a tax position taken or expected to be taken in a tax return. The fund did not have a liability to record for any unrecognized tax benefits in the accompanying financial statements. No provision has been made for federal taxes on income, capital gains or unrealized appreciation on securities held nor for excise tax on income and capital gains. Each of the fund’s federal tax returns for the prior three fiscal years remains subject to examination by the Internal Revenue Service.

At May 31, 2012, the fund had a capital loss carryover of $912,016 available to the extent allowed by the Code to offset future net capital gain, if any. The amounts of the carryovers and the expiration dates are:

* Under the Regulated Investment Company Modernization Act of 2010, the fund will be permitted to carry forward capital losses incurred in taxable years beginning after December 22, 2010 for an unlimited period. However, any losses incurred will be required to be utilized prior to the losses incurred in pre-enactment tax years. As a result of this ordering rule, pre-enactment capital loss carryforwards may be more likely to expire unused. Additionally, post-enactment capital losses that are carried forward will retain their character as either short-term or long-term capital losses rather than being considered all short-term as under previous law.

Pursuant to federal income tax regulations applicable to regulated investment companies, the fund has elected to defer certain capital losses of $2,588 recognized during the period between November 1, 2011 and May 31, 2012 to its fiscal year ending May 31, 2013.

The aggregate identified cost on a tax basis is $76,058,265, resulting in gross unrealized appreciation and depreciation of $7,553,536 and $86,301, respectively, or net unrealized appreciation of $7,467,235.

Distributions to shareholders Income dividends are recorded daily by the fund and are paid monthly. Distributions from capital gains, if any, are recorded on the ex-dividend date and paid at least annually. The amount and character of income and gains to be distributed are determined in accordance with income tax regulations which may differ from generally accepted accounting principles. Dividend sources are estimated at the time of declaration. Actual results may vary. Any non-taxable return of capital cannot be determined until final tax calculations are completed after the end of the fund’s fiscal year. Reclassifications are made to the fund’s capital accounts to reflect income and gains available for distribution (or available capital loss carryovers) under income tax regulations.

Putnam Management has contractually agreed, through June 30, 2013, to waive fees or reimburse the fund’s expenses to the extent necessary to limit the cumulative expenses of the fund, exclusive of brokerage, interest, taxes, investment-related expenses, extraordinary expenses, acquired fund fees and expenses and payments under the fund’s investor servicing contract, investment management contract and distribution plans, on a fiscal year-to-date basis to an annual rate of 0.20% of the fund’s average net assets over such fiscal year-to-date period. During the reporting period, the fund’s expenses were not reduced as a result of this limit.

Putnam Investments Limited (PIL), an affiliate of Putnam Management, is authorized by the Trustees to manage a separate portion of the assets of the fund as determined by Putnam Management from time to time. Putnam Management pays a quarterly sub-management fee to PIL for its services at an annual rate of 0.40% of the average net assets of the portion of the fund managed by PIL.

The fund reimburses Putnam Management an allocated amount for the compensation and related expenses of certain officers of the fund and their staff who provide administrative services to the fund. The aggregate amount of all such reimbursements is determined annually by the Trustees.

Custodial functions for the fund’s assets are provided by State Street. Custody fees are based on the fund’s asset level, the number of its security holdings and transaction volumes.

Putnam Investor Services, Inc., an affiliate of Putnam Management, provides investor servicing agent functions to the fund. Putnam Investor Services, Inc. received fees for investor servicing based on the fund’s retail asset level, the number of shareholder accounts in the fund and the level of defined contribution plan assets in the fund. Investor servicing fees will not exceed an annual rate of 0.32% of the fund’s average net assets. Prior to March 1, 2012, investor servicing fees could not exceed an annual rate of 0.375% of the fund’s average net assets. During the reporting period, the class specific expenses related to investor servicing fees were as follows: