What a municipal bond is
A municipal bond is a loan you make to a city, county, or state government. When you buy one, you give that government money upfront. In return, they promise to pay you back the full amount plus interest on a set schedule — usually over 10 to 30 years. The government uses the money to build or repair things like roads, schools, water systems, or public housing.
Municipal bonds are different from regular corporate bonds because the interest you earn is often not taxed by the federal government, and sometimes not by your state either. This tax advantage is why they exist: it makes borrowing cheaper for governments, and it makes the bonds attractive to people who pay high income taxes.
You buy and sell municipal bonds through a broker, the same way you would buy stocks. The price you pay can be more or less than the face value (the amount the government promised to repay), depending on interest rates and how safe the market thinks the bond is.
Key Takeaways
- Municipal bonds are loans to governments that pay you interest, and that interest is usually not taxed by the federal government.
- Governments use the money to build public infrastructure like roads, schools, and water systems.
- The tax break makes municipal bonds most valuable to people in high tax brackets, not to everyone.
- Municipal bonds carry risk — the government could fail to pay you back, though this is rare for bonds backed by tax revenue.
- You buy and sell them through a broker, and the price changes based on interest rates and the government's financial health.
Why homeowners own municipal bonds
Homeowners often own municipal bonds as part of a diversified investment portfolio, especially if they have paid off their mortgage and are looking for steady income. The tax-free interest is the main draw: if you are in a high federal tax bracket, a municipal bond paying 4% interest might be worth more to you than a corporate bond paying 5%, because you keep more of the 4%.
Municipal bonds are also considered safer than stocks because they pay a fixed amount on a fixed schedule. If you need predictable income and you do not want to worry about stock market swings, they can fit that role. Many people hold them in retirement accounts or as part of a longer-term savings plan.
However, municipal bonds are not right for everyone. If you are in a low tax bracket, the tax break does not help you much, and you might earn better returns elsewhere. A financial advisor can tell you whether they make sense for your situation.
How the tax break works
Interest from most municipal bonds is not taxed by the federal government. This is a deliberate policy: Congress allows it so that governments can borrow money more cheaply. If a bond pays 4% interest and you would normally pay 24% federal income tax on investment income, the tax break saves you money.
Some municipal bonds are also exempt from state and local income tax if you live in the state that issued them. A bond issued by California is usually tax-free in California if you are a California resident, but taxed as regular income if you live in another state. This varies by state and by bond type.
The tax break does not apply to capital gains. If you buy a bond for $900 and sell it for $1,000, you owe federal tax on that $100 profit, even though the interest itself was tax-free.
The risk that a government will not pay you back
Municipal bonds carry credit risk — the risk that the government will not have the money to pay you back when the bond matures. This is rare, but it happens. Detroit, for example, went through a major financial crisis in 2013 and cut payments to bondholders. Puerto Rico defaulted on its bonds in 2015.
The risk depends on what backs the bond. A bond backed by tax revenue from a stable city is much safer than a bond backed by revenue from a single project that might fail. Rating agencies like Moody's and Standard & Poor's grade municipal bonds the same way they grade corporate bonds — AAA is the safest, and ratings drop from there.
Before you buy a municipal bond, look at its rating and read the official statement, which explains what backs the bond and what the government's finances look like. If a bond is paying much higher interest than similar bonds, ask why — it might be because the market thinks it is riskier.
Interest rate risk and price changes
When interest rates rise, the price of existing bonds falls. This is because new bonds will pay higher interest, so older bonds paying lower interest become less valuable. If you need to sell a bond before it matures, you might have to sell it for less than you paid.
The longer the bond's maturity, the bigger this price swing can be. A 30-year bond will drop more in price than a 5-year bond if interest rates jump. This is why bonds with longer maturities usually pay higher interest — you are taking on more risk that rates will change.
If you hold the bond until maturity, you get your full face value back regardless of price changes along the way. But if you need to sell early, you could lose money. This is why municipal bonds work best for people who can hold them for the long term.
Municipal bonds versus other investments
Municipal bonds pay less interest than corporate bonds or stocks historically do, but they also swing less in price and they offer the tax break. The trade-off is lower returns for lower risk and tax savings.
Compared to savings accounts or money market funds, municipal bonds pay more interest but carry more risk. A savings account is may provide by the FDIC up to $250,000, but a municipal bond is only as safe as the government that issued it.
Many people use municipal bonds as one piece of a larger portfolio. You might hold some bonds for stability and tax savings, some stocks for growth, and some cash for emergencies. A financial advisor can help you figure out what mix makes sense for your goals and how much risk you are comfortable taking.
How to buy and sell municipal bonds
You buy municipal bonds through a broker — a financial firm licensed to trade securities. You can use a full-service broker (who gives advice but charges higher fees), a discount broker (who executes trades but does not advise), or an online platform. Some brokers specialize in municipal bonds and have better prices or selection.
When you buy, you pay the price the bond is trading at, plus any accrued interest since the last coupon payment. You also pay a commission or markup, which varies by broker. Ask what you will pay before you buy.
You can hold the bond until maturity and collect your payments, or you can sell it before maturity if you need the money. The price you get depends on current interest rates and the bond's credit rating at the time you sell.
Frequently Asked Questions
Are municipal bonds completely safe?
No. While defaults are rare, they do happen. Bonds backed by stable tax revenue are much safer than bonds backed by a single project or a struggling government. Check the bond's rating and read the official statement before you buy.
Can I lose money on a municipal bond?
Yes, in two ways. If you sell before maturity and interest rates have risen, the price will be lower than what you paid. If the government defaults, you may not get your full money back. Holding until maturity protects you from interest rate risk but not credit risk.
Who should buy municipal bonds?
People in high tax brackets who want steady income and can hold the bond for the long term. If you are in a low tax bracket, the tax break does not help much. If you need your money soon, the interest rate risk makes them less suitable.
What is the difference between a general obligation bond and a revenue bond?
A general obligation bond is backed by the government's full taxing power — the government promises to raise taxes if needed to pay you back. A revenue bond is backed only by income from a specific project, like a toll road or water system. General obligation bonds are usually safer.
Do I have to hold a municipal bond until maturity?
No. You can sell it anytime through a broker. But if you sell when interest rates are higher than when you bought, you will get less than you paid. If you sell when rates are lower, you might get more.