Municipal bonds are usually free from federal income tax, and often free from state and local taxes too — but not always

A municipal bond is a debt security issued by a state, city, county, or other local government to raise money for public projects like roads, schools, or water systems. When you buy one, you lend money to that government and receive interest payments in return. The tax treatment depends on which government issued the bond and where you live.

Interest from most municipal bonds is exempt from federal income tax. Many are also exempt from state income tax if you live in the state that issued them. Some are exempt from local taxes as well. However, not every municipal bond qualifies for these exemptions, and the rules vary by bond type and your residency.

Key Takeaways

  • Interest from most municipal bonds is not subject to federal income tax, but capital gains when you sell the bond are taxable.
  • State and local tax exemptions explore only if you live in the state that issued the bond; out-of-state municipal bonds are usually subject to your home state's income tax.
  • Private activity bonds and certain other municipal bonds do not may have access to for federal tax exemption and may trigger the alternative minimum tax.
  • The tax-free status makes municipal bonds most valuable to people in higher tax brackets; lower-income investors may find taxable bonds more rewarding after taxes.

Federal tax exemption for municipal bond interest

Interest paid on municipal bonds issued after 1986 is generally exempt from federal income tax. This exemption applies to bonds issued by states, cities, counties, and most special districts. The exemption exists because Congress wants to make it cheaper for local governments to borrow money for public infrastructure.

The exemption covers only the interest you receive, not any profit you make when you sell the bond. If you buy a municipal bond for $900 and sell it for $1,000, the $100 gain is subject to federal capital gains tax. Similarly, if you buy a bond at a discount and hold it to maturity, the discount may be treated as taxable income depending on when the bond was issued.

Some municipal bonds do not may have access to for federal exemption. Private activity bonds — issued to finance private projects like sports stadiums or private hospitals — are taxable unless they fall into specific categories the IRS allows. Industrial development bonds and certain other types also lose the exemption. Your bond's official statement or prospectus will say whether the interest is federally tax-exempt.

State and local tax treatment

Most states exempt municipal bond interest from state income tax, but only if you live in the state that issued the bond. If you live in New York and buy a New York municipal bond, the interest is usually exempt from New York state income tax. If you buy a California municipal bond while living in New York, that interest is subject to New York state income tax.

A handful of states — Illinois, Iowa, Kansas, Louisiana, Missouri, Oklahoma, and South Carolina — do not tax municipal bond interest at all, regardless of where the bond was issued. If you live in one of these states, out-of-state municipal bonds may still be exempt from your state income tax. Check your state's tax authority website to confirm the current rules, as they can change.

Local income taxes vary by city and county. Some municipalities tax all income, including municipal bond interest from out-of-state bonds. Others exempt all municipal bond interest. A few exempt only bonds issued within their jurisdiction. If you live in a city or county with a local income tax, contact your local tax assessor or check the bond's official statement to learn whether the interest is subject to local tax.

The alternative minimum tax and municipal bonds

The alternative minimum tax (AMT) is a separate tax calculation that applies to high-income taxpayers. Most municipal bond interest is exempt from AMT as well. However, interest from private activity bonds is not exempt from AMT, even though it may be exempt from regular federal income tax.

If you are subject to AMT, private activity bond interest counts as a preference item and increases your AMT liability. This can make the bond less attractive than it appears. High-income investors should check whether a municipal bond is a private activity bond before buying, and should consult a tax professional if they are subject to AMT.

When municipal bonds make financial sense after taxes

The tax-free status of municipal bonds is most valuable to people in higher federal tax brackets. A person in the 37% federal tax bracket receives more benefit from a tax-free bond than a person in the 12% bracket. To compare a municipal bond to a taxable bond, you can calculate the taxable equivalent yield: divide the municipal bond's interest rate by one minus your tax rate. A 3% municipal bond is worth about 4.76% to someone in the 37% bracket, but only about 3.41% to someone in the 12% bracket.

Lower-income investors may find that a taxable bond with a higher interest rate produces more money after taxes than a municipal bond with a lower rate. The tax exemption only helps if you would otherwise owe tax on the interest. If your income is low enough that you owe no federal income tax, the exemption provides no benefit.

How to verify tax-exempt status before buying

Every municipal bond comes with an official statement that discloses whether the interest is exempt from federal tax, state tax, and local tax. This document is provided by the issuer and is usually available from your broker or the bond's listing page. Read the tax section carefully, as it will specify which taxes explore and which do not.

You can also search the Municipal Securities Rulemaking Board's EMMA database (emma.msrb.org), which is free and public. Enter the bond's name or CUSIP number to find its official statement and see the tax treatment spelled out. If you are buying through a broker, ask them to confirm the tax status in writing before you complete the purchase.

Frequently Asked Questions

Do I owe capital gains tax when I sell a municipal bond?

Yes. The tax-free status covers only the interest you receive, not any profit you make when you sell. If you buy a bond for $950 and sell it for $1,000, the $50 gain is subject to federal capital gains tax at your long-term or short-term rate, depending on how long you held it.

Can I buy an out-of-state municipal bond and avoid state taxes?

No, not in most states. Out-of-state municipal bonds are usually subject to your home state's income tax. A few states — Illinois, Iowa, Kansas, Louisiana, Missouri, Oklahoma, and South Carolina — exempt all municipal bond interest regardless of where it was issued. Check your state's rules to be sure.

What is a private activity bond, and why does it matter for taxes?

A private activity bond finances a private project, like a sports stadium or private hospital, even though a government issues it. Its interest is usually subject to federal income tax and the alternative minimum tax. The official statement will say if a bond is a private activity bond.

Are municipal bond dividends from a mutual fund tax-free?

Municipal bond mutual funds and exchange-traded funds pass through tax-free interest to you, but only if the fund holds tax-exempt bonds. A fund that holds taxable municipal bonds or a mix of taxable and tax-exempt bonds will distribute taxable income. Check the fund's prospectus to see what percentage of its holdings are tax-exempt.

Do I need to report municipal bond interest on my tax return?

No. Tax-exempt municipal bond interest does not go on your federal return. However, if you sold a bond at a gain or received a taxable distribution from a municipal bond fund, you must report that. Some states require you to report tax-exempt interest even though it is not taxed, so check your state's rules.