Yes, you can lose money on municipal bonds. The most common loss comes from selling before maturity after interest rates have risen, but defaults, inflation, early calls, and tax surprises can all shrink what you keep. Investment-grade municipal defaults have been rare historically, with a cumulative 10-year default rate of roughly 0.09%, but rare is not impossible, and interest-rate losses happen constantly.
Selling Before Maturity in a Rising-Rate Market
Hold a muni to maturity, and barring default, you get your principal back in full. Sell early, and your bond has to compete on the secondary market with newer bonds. If rates have climbed since you bought, no one will pay full price for your lower-yielding security. A $10,000 bond trading at 95 cents on the dollar nets you $9,500, and that $500 gap is a permanent loss of capital.
Duration tells you how sensitive the price is to rate changes. For every one-point rise in interest rates, a bond’s price drops by roughly its duration number as a percentage. A duration of 5 means about a 5% price drop on a one-point rate increase; a duration of 10 means about 10%.1Municipal Securities Rulemaking Board. Evaluating a Municipal Bonds Interest Rate Risk Longer maturities almost always carry higher duration, which is why a 30-year muni can swing hard in price while a 2-year note barely moves.
Transaction costs make the sting worse. Broker-dealers apply a markup or markdown, typically $5 to $10 per $1,000 of face value, or about 0.5% to 1% of the bond’s value. Small trades often get hit with proportionally larger markups. FINRA requires that the markup be disclosed as both a dollar amount and a percentage.2FINRA. Fixed Income Markup Disclosure
Liquidity matters too. Bonds from large, well-known issuers trade quickly with tight spreads. A small hospital revenue bond from a rural district may sit on the market for days, and you might have to cut your asking price to attract a buyer. If you’re selling because you need cash fast, illiquidity compounds whatever rate-driven loss you’re already facing.
Default and Bankruptcy
Defaults are uncommon, but when they happen the losses can be severe. A default means the issuer has missed a scheduled interest payment, failed to pay principal at maturity, or breached a covenant. Your exposure depends heavily on what kind of bond you hold.
General Obligation Versus Revenue Bonds
General obligation bonds are backed by the issuer’s full faith and credit, meaning the government can raise taxes to pay you. Revenue bonds depend on income from a specific project such as a toll road, airport, or hospital.3Municipal Securities Rulemaking Board. Municipal Bond Basics If that project underperforms, the money to pay bondholders dries up regardless of the broader municipality’s finances. Revenue bonds default more often than general obligation bonds for exactly that reason.
Chapter 9 and Recovery Rates
When a municipality cannot pay, it may file for protection under Chapter 9 of the U.S. Bankruptcy Code.4Office of the Law Revision Counsel. 11 USC Chapter 9 – Adjustment of Debts of a Municipality A federal court oversees a restructuring plan that can force bondholders to accept reduced payments. The average recovery on defaulted municipal bonds has been roughly 67 cents on the dollar when measured per issuer, though the dollar-weighted average is closer to 52 cents because larger defaults tend to produce worse outcomes.
Haircuts vary widely within a single bankruptcy. In Detroit’s 2013 case, holders of voter-approved unlimited-tax general obligation bonds recovered about 74 cents on the dollar, limited-tax general obligation holders got 34 cents, and holders of certificates of participation got about 14 cents. Puerto Rico’s debt restructuring, the largest in municipal history, left general obligation bondholders with an adjusted recovery of roughly 53 cents on the dollar. These proceedings also run for years, during which your capital is locked up.
Bond Insurance
Some municipal bonds carry private insurance from firms like Build America Mutual or Assured Guaranty. If the issuer misses a payment, the insurer pays bondholders on schedule. An insured bond effectively carries the credit rating of the insurer rather than the issuer. Check whether your bond is insured before reacting to a downgrade; the insurer’s guarantee may be what actually protects your principal.
What Credit Ratings Tell You About Risk
Ratings from Moody’s, S&P, and Fitch are the quickest shorthand for default probability. The line between investment-grade and speculative-grade matters enormously. Investment grade is BBB- or higher on the S&P and Fitch scales, and Baa3 or higher on the Moody’s scale. Below those thresholds is speculative, sometimes called high-yield or junk.
The gap between the two categories is dramatic. From 1970 through 2022, investment-grade municipal bonds had a cumulative 10-year default rate of 0.09%. Speculative-grade municipals defaulted at a cumulative 10-year rate of 6.84%, roughly 75 times higher. Over 15 years, the speculative-grade rate climbed to 8.40%. That is why many conservative investors stick to bonds rated A or better.
Ratings also move. A bond rated A today can be downgraded to BBB or lower if the issuer’s finances weaken. A downgrade is not a default, but it pushes the bond’s market price down as investors demand more yield for the added risk. Sell a recently downgraded bond and you take a loss even if the issuer keeps paying.
Inflation Eroding Your Real Return
A bond paying 3% looks fine until inflation runs at 5%. You still receive every promised dollar, but those dollars buy less than they did when you lent them. The real return, your yield minus inflation, is negative 2% in that scenario. The nominal checks arrive on schedule, but your purchasing power shrinks.
Long-term bonds are especially exposed because they lock in a fixed rate for 20 or 30 years. Inflation early in the term compounds over the remaining life. Municipal bonds carry no built-in inflation adjustment the way Treasury Inflation-Protected Securities do. If bond income is meant to cover living expenses in retirement, sustained inflation above your coupon rate is functionally a loss.
Callable Bonds and Reinvestment Risk
Many municipal bonds include a call provision letting the issuer redeem the bond before its stated maturity, often after a 10-year protection period.5Municipal Securities Rulemaking Board. Municipal Bond Basics – Section: Bond Features Issuers call bonds when rates have dropped, so they can refinance cheaper. Good for the city, bad for you. When a bond is called, you receive face value plus accrued interest, and future coupon payments stop.6FINRA. Callable Bonds: Be Aware That Your Issuer May Come Calling
The real damage is what comes next. You now have cash to reinvest in a market where rates have fallen. An investor counting on 5% for 20 years may find their bond called after 10, with replacements yielding 2% or 3%. Over the remaining decade, that gap compounds into a substantial income shortfall. Callable bonds usually pay a slightly higher coupon than non-callable bonds of similar credit quality, but few investors run the math to confirm the premium is enough.
Tax Surprises That Shrink Returns
Municipal bond interest is generally excluded from federal income tax under Section 103 of the Internal Revenue Code.7Office of the Law Revision Counsel. 26 USC 103 – Interest on State and Local Bonds That exemption is the reason munis exist in most portfolios. Several tax traps still catch investors and can turn an expected tax-free return into a taxable one.
Capital Losses and the Deduction Cap
Sell a muni for less than you paid, and the loss is a capital loss. Capital losses offset capital gains dollar for dollar, but if your losses exceed your gains, you can only deduct up to $3,000 per year against ordinary income ($1,500 if married filing separately). The rest carries forward.8Internal Revenue Service. Topic No. 409, Capital Gains and Losses A large loss on a muni sold into rising rates could take several years to fully deduct.
The De Minimis Rule
Buy a muni on the secondary market at a discount, and the IRS applies a de minimis test. If the discount is less than 0.25% of face value multiplied by the number of full years remaining to maturity, gain at sale or maturity is taxed as a capital gain. If the discount exceeds that threshold, the accrued market discount is taxed as ordinary income instead. Ordinary rates are almost always higher. A seemingly cheap muni can carry a bigger tax bill than expected.
State Taxes on Out-of-State Bonds
The federal exemption does not mean the interest escapes all taxation. Most states with an income tax will tax interest on bonds issued by another state’s government. Live in a high-tax state and buy out-of-state munis, and you may owe state income tax on the interest, shrinking the after-tax yield you actually keep. Buying bonds issued within your own state typically avoids this, and states without an income tax make the question moot.
AMT on Private Activity Bonds
Certain municipal bonds classified as private activity bonds, issued to finance projects that primarily benefit private entities rather than the general public, generate interest that counts as a preference item under the alternative minimum tax. If you are subject to the AMT, that otherwise tax-free interest gets added back for the AMT calculation. The Tax Cuts and Jobs Act of 2017 raised AMT exemption thresholds high enough that fewer individuals are affected, but high-income investors with large muni portfolios should still check whether any of their holdings are private activity bonds before treating the interest as fully tax-free.