Michigan municipal bonds are debt securities issued by the state’s cities, counties, school districts, and authorities to fund public projects, governed by the Revised Municipal Finance Act (Act 34 of 2001) and reviewed by the Michigan Department of Treasury before issuance.1Michigan Legislature. MCL – Act 34 of 2001 – Revised Municipal Finance Act For investors, they offer interest that is generally exempt from federal income tax and, for Michigan residents, from state and local income tax as well. For issuers, they are the standard way to finance roads, schools, water systems, and other infrastructure. Both sides share the same risks, which Detroit’s 2013 bankruptcy brought into sharp focus.
Types of Michigan Municipal Bonds
Michigan municipalities issue several kinds of bonds, and the type matters more than the issuer’s name on the cover. The repayment source determines what you can expect if the issuer runs into trouble.
General Obligation Bonds
General obligation bonds are backed by the full faith, credit, and taxing power of the issuer. If voters authorize the bond, the municipality pledges to levy whatever taxes are necessary to cover principal and interest.2Michigan Legislature. MCL – Section 123.1153 – Recreational Authorities Act (Excerpt) That pledge is why GO bonds are considered the safest class of municipal debt and carry lower yields. Schools, roads, and general infrastructure without a dedicated revenue stream are typically financed this way. The safety is not absolute, though, as Detroit showed.
Revenue Bonds
Revenue bonds are repaid only from the income produced by the specific project they finance, such as a water system or parking structure. Michigan law requires the face of each revenue bond to state plainly that it is not a general obligation of the issuer and that principal and interest are payable only from the pledged revenue.3Michigan Legislature. The Revenue Bond Act of 1933 Because the taxing power is not on the line, these bonds do not require voter approval. The tradeoff is clear: if the project underperforms, there is no tax backstop.
Special Assessment Bonds
Special assessment bonds fund improvements that benefit a defined group of properties, such as new sidewalks or sewer connections. Repayment comes from assessments levied on those specific properties, not from general taxes.4Michigan Legislature. MCL – Section 141.120c – The Revenue Bond Act of 1933 (Excerpt) Unpaid installments accrue interest at a rate set by the local governing body, capped at 1% above the average interest rate on the related bonds, or at 8% if no bonds were issued.5Michigan Legislature. MCL – Section 41.727 – Payment of Special Assessments in Installments Because repayment depends on a small pool of property owners, these bonds carry concentration risk.
Green and Sustainability Bonds
Some Michigan issuers label bonds as “green” or “sustainability” bonds when proceeds go toward environmentally beneficial projects. These are not a separate legal category under Michigan law. They are structured as GO or revenue bonds with an added layer of voluntary reporting, often following the Green Bond Principles or Sustainability Bond Guidelines published by the International Capital Market Association. The label does not change the legal repayment structure. A green revenue bond still depends on project revenue, and a green GO bond still depends on taxing power.
How Michigan Municipal Bond Interest Is Taxed
The tax treatment is the main draw. Interest on Michigan municipal bonds is generally excluded from federal gross income.6Internal Revenue Service. Tax-Exempt Bonds For Michigan residents, that interest is also typically exempt from state and local income tax, which pushes the effective after-tax yield above what the stated coupon suggests when compared to taxable alternatives.7MSRB. Municipal Bond Basics Because of these tax benefits, municipal yields tend to run lower than corporate bonds or Treasuries of comparable maturity.
Private Activity Bonds and the AMT
Not every muni gets full tax-exempt treatment. Private activity bonds, where proceeds primarily benefit private entities (think a privately operated sports facility or housing development), may have their interest pulled into the alternative minimum tax calculation. Private activity bond interest is a permanent preference item in the AMT.7MSRB. Municipal Bond Basics
This matters more starting in 2026. Several provisions of the Tax Cuts and Jobs Act that raised AMT exemption amounts and phase-out thresholds are scheduled to expire. Lower thresholds mean private activity bond interest will trigger AMT exposure for more investors and at lower income levels than in recent years. The market compensates with slightly higher yields on AMT-subject bonds. If you hold significant private activity bond positions, checking your AMT exposure with a tax professional before year-end is worth the effort.
What Can Go Wrong
Municipal bonds are often marketed as safe. Relative to equities, they generally are. Safer does not mean risk-free.
Interest Rate Risk
Bond prices move inversely with interest rates. Buy a bond paying 3%, watch prevailing rates climb to 5%, and your bond’s market value drops because new buyers can find better yields elsewhere. This only matters if you sell before maturity, but it constrains your liquidity. Longer-maturity bonds are more sensitive, so investors who may need flexibility should lean shorter.
Credit Risk
An issuer’s credit rating drives both its borrowing cost and the market price of its outstanding bonds. Watch for warning signs: declining population, shrinking tax base, growing pension obligations, or repeated failure to file continuing disclosure documents. Downgrades often precede more serious problems, and Michigan has seen several municipalities cycle through financial distress in recent decades.
Revenue Risk
Revenue bonds carry the added uncertainty that the underlying project might not produce enough income to cover debt service. A water utility facing declining usage, a toll road with lower-than-projected traffic, or a parking structure in a hollowed-out downtown can all leave bondholders exposed. Reviewing feasibility studies and historical operating data for the revenue-generating facility is essential before buying.
Over-Leveraging
Michigan caps a city’s net indebtedness at 20% of its assessed value under MCL 117.36a, with a tighter 12% cap for cities issuing financial recovery bonds.8Michigan Legislature. MCL – Section 117.36a A municipality can face serious budget strain well before reaching that ceiling. Look at the debt service coverage ratio, not just the total debt figure. How many times over does available revenue cover required payments? That tells you how much cushion exists for a bad year.
What Bankruptcy Means for Your Bond
Detroit’s 2013 Chapter 9 filing, the largest municipal bankruptcy in U.S. history at the time, changed how investors should think about Michigan municipal debt.
Who Can Even File
A municipality cannot file Chapter 9 on its own. Federal law requires state authorization. Michigan grants that authorization through the Local Financial Stability and Choice Act (PA 436 of 2012). The local government must adopt a resolution declaring a financial emergency by majority vote and then obtain written approval from the governor. The resolution must state that the municipality’s financial condition jeopardizes residents’ health, safety, and welfare, and that the municipality will be unable to pay its obligations within 60 days. The governor can attach conditions, including appointing someone to act on the municipality’s behalf during the proceedings.9Michigan Legislature. MCL – Section 141.1566 – Local Financial Stability and Choice Act (Excerpt)
GO Bonds vs. Revenue Bonds in Chapter 9
In a Chapter 9 case, general obligation bonds are treated as general unsecured debt. The municipality is not required to make principal or interest payments during the proceedings, and GO obligations are subject to negotiation and potential restructuring under the plan of adjustment.10United States Courts. Chapter 9 – Bankruptcy Basics That is a sobering reality for anyone who assumed a “full faith and credit” pledge made the investment untouchable.
Special revenue bonds continue to be secured and serviced during the bankruptcy through ongoing application of their pledged revenue, provided the pledge is consistent with federal law and operating expenses of the underlying project are paid first.10United States Courts. Chapter 9 – Bankruptcy Basics Revenue bondholders are not guaranteed to come through whole, but their structural position is meaningfully stronger.
What Happened in Detroit
Detroit’s plan of adjustment eliminated more than $7 billion in debt. GO bondholders on one class of bonds received roughly 41 cents on the dollar. Other unsecured creditors saw recoveries ranging from about 13% to as high as 60%, depending on the claim class. The bankruptcy judge characterized the legal question of whether certain GO bonds represented secured claims as a “coin toss.” The lesson for investors is that credit analysis and ongoing fiscal monitoring matter far more than the label on the bond.
Due Diligence Before You Buy
Several public tools let you check a Michigan issuer’s health before committing money. None of them take long to use, and skipping them is one of the most common mistakes retail investors make.
Check EMMA for Continuing Disclosure
SEC Rule 15c2-12 bars underwriters from selling municipal securities unless the issuer has agreed in writing to provide ongoing financial information to the Municipal Securities Rulemaking Board. That information includes annual financial statements and operating data, plus notice within ten business days of material events such as payment delinquencies, rating changes, bankruptcy filings, or unscheduled draws on debt reserves.11eCFR. 17 CFR 240.15c2-12 – Municipal Securities Disclosure All of it is published on the MSRB’s Electronic Municipal Market Access site at emma.msrb.org, which is the official repository for municipal bond disclosures.12MSRB. SEC Rule 15c2-12 Continuing Disclosure Pull up the issuer’s most recent annual filing and any event notices before you buy.
Check Debt Load Against the Cap
Compare the issuer’s existing debt load to the 20% of assessed value ceiling (or 12% for cities with financial recovery bonds).8Michigan Legislature. MCL – Section 117.36a A municipality running close to its cap has less room to maneuver when revenues dip.
Watch for Treasury Red Flags
Under Act 34, a municipality earns “qualified status” by filing a qualifying statement with the Department of Treasury, certified by its chief administrative officer. Treasury then has 30 business days to determine compliance. If the municipality qualifies, or Treasury does not respond in time, it can issue bonds without further state approval until the next qualifying statement is due. Loss of qualified status is a signal of distress. Qualification requires that the municipality is not under emergency financial management, has not issued emergency loans in the past five fiscal years, has not been court-ordered to levy a tax, and does not carry excessive debt or deficit fund balances.13Michigan Legislature. Michigan Code Act 34 of 2001 Any of those triggers in an issuer’s history deserves a closer look.
Know When an Emergency Manager Is Running the Show
The Local Financial Stability and Choice Act lets the state appoint emergency managers who take control of a financially distressed municipality’s operations, including its debt. An emergency manager can authorize new borrowing, approve or reject bond issuances, enter into agreements to restructure existing debt with creditors (subject to state treasurer approval), and develop plans for paying outstanding obligations.14Michigan Legislature. Local Financial Stability and Choice Act The appointment is a serious signal that elected officials have lost control of the finances. It can also stabilize an issuer, since the manager has authority to cut costs and renegotiate contracts in ways elected officials often cannot. Either way, bondholders should monitor Treasury filings closely and understand who is actually making decisions.
Know Who’s Supposed to Deal Fairly With You
At the federal level, the SEC’s Office of Municipal Securities oversees the roughly $4 trillion municipal bond market and provides oversight of the MSRB.15U.S. Securities and Exchange Commission. About the Office of Municipal Securities MSRB Rule G-17 requires brokers, dealers, and municipal advisors to deal fairly with all parties and prohibits deceptive or dishonest practices.16MSRB. Rule G-17 Conduct of Municipal Securities and Municipal Advisory Activities If something about an offering feels off, that rule is the standard your broker is expected to meet.