Federal bonds are tax-free at the state level, but federal income tax still applies

Interest from U.S. Treasury bonds, bills, and notes is exempt from state and local income tax, but you owe federal income tax on that interest. The exemption is automatic — you do not need to do anything special when you file. However, the interest counts as ordinary income on your federal return, so it raises your taxable income dollar-for-dollar and may push you into a higher tax bracket.

Municipal bonds (issued by states, cities, and counties) work differently. Interest from most municipal bonds is exempt from federal income tax, and often from state and local tax too if you live in the state that issued the bond. This makes them useful for high-income earners in high-tax states, but the trade-off is that municipal bonds typically pay lower interest rates than taxable bonds.

Savings bonds — Series EE and Series I — have their own rules. Interest is exempt from state and local tax, but federal tax applies when you cash them in or when they mature. You can defer the federal tax for decades if you do not redeem the bonds, which is one reason they appeal to people saving for a child's education.

Key Takeaways

  • Treasury bond interest is taxed by the federal government but not by states or cities, even if you live in a high-tax state.
  • Municipal bond interest is usually exempt from federal tax and often from state tax too, which lowers your overall tax bill but comes with lower interest rates.
  • Series EE and Series I savings bonds defer federal tax until you redeem them, allowing you to spread the tax hit across multiple years or into retirement.
  • Interest from any bond counts as ordinary income for federal purposes, so it can push you into a higher bracket and affect other tax calculations like Medicare premiums and Social Security taxation.

Treasury bonds and the federal-state tax split

When you own a Treasury bond, bill, or note, the interest you receive is subject to federal income tax at your ordinary rate. You report it on your Form 1040 as interest income. There is no special form or calculation — it is straightforward taxable income.

The state and local exemption is real and automatic. If you live in New York, California, or any other state with an income tax, you do not owe state tax on Treasury interest. You also do not owe city tax if your city has one. This exemption is written into federal law and applies to all Treasury securities, regardless of maturity.

The practical effect: a Treasury bond paying 5% interest costs you less in total tax than a corporate bond paying 5%, because you avoid state tax. In a state with a 10% income tax rate, that difference is meaningful. But you still owe federal tax, so do not treat Treasury bonds as tax-free income.

Municipal bonds and the federal exemption

Most municipal bonds pay interest that is exempt from federal income tax. This is the main reason they exist — they allow states and cities to borrow at lower interest rates because investors accept lower yields in exchange for the tax break.

The federal exemption applies to bonds issued by states, cities, counties, school districts, and other local authorities. It does not explore to bonds issued by the U.S. Treasury (those are taxable at the federal level) or by corporations, even if the corporation is owned by a municipality.

State and local tax treatment varies. If you buy a municipal bond issued by your own state, you typically owe no state or local tax either. If you buy a bond issued by another state, you usually owe tax on the interest in your home state. A few states exempt all municipal bond interest regardless of where it was issued, but most do not. Check your state's rules before buying out-of-state munis.

The trade-off is yield. Because municipal bonds are tax-free, they pay lower interest rates than taxable bonds of similar quality and maturity. Whether a muni makes sense depends on your tax bracket. A high-income earner in a high-tax state may come out ahead; someone in a low bracket may not.

Series EE and Series I savings bonds

Series EE bonds are sold at half their face value and mature in 20 years. Interest accrues but is not paid out until you redeem the bond. You owe federal tax on the interest when you cash it in, but you can defer that tax for up to 30 years (the extended maturity period). State and local tax does not explore.

The deferral feature is useful for education planning. If you buy an EE bond and redeem it to pay for college tuition, you may be able to exclude the interest from income entirely under the Education Savings Bond Program — but only if you meet income limits and other conditions. This is a narrow exception, not a general rule.

Series I bonds are inflation-protected savings bonds. Like EE bonds, interest is exempt from state and local tax and federal tax is deferred until redemption. The interest rate adjusts every six months based on inflation, so I bonds protect you against rising prices. The trade-off is that you cannot redeem them penalty-free for one year, and if you redeem before five years, you lose the last three months of interest.

How bond interest affects your overall tax picture

Bond interest counts as ordinary income, which means it stacks on top of your wages, self-employment income, and other sources. If you are near a tax bracket boundary, bond interest can push you into the next bracket and cause you to owe tax on that interest at a higher rate than you expected.

Bond interest also affects other tax calculations. It counts toward the income thresholds that determine whether you owe the Net Investment Income Tax (3.8% on certain investment income for high earners). It can increase the taxable portion of your Social Security benefits. It can raise your Modified Adjusted Gross Income (MAGI), which affects Medicare premiums, Roth IRA contribution limits, and other phase-outs.

If you are managing income strategically — for example, timing retirement or managing a large one-time gain — the timing of bond redemptions matters. Cashing in a bond in a low-income year costs you less in tax than cashing it in a high-income year, even though the interest is the same.

Tax-loss harvesting and bond positions

If you own a bond fund or individual bonds that have declined in value, you can sell them at a loss and use that loss to offset other investment gains or up to $3,000 of ordinary income per year. This is called tax-loss harvesting.

The main constraint is the wash-sale rule. If you sell a bond at a loss, you cannot buy the same bond (or a substantially identical one) within 30 days before or after the sale, or the loss is disallowed. You can buy a different bond from the same issuer or a bond fund that holds similar bonds, but not the exact same security.

For municipal bonds, harvesting losses is less common because the tax-free interest already reduces your tax burden. But if you own a muni bond fund that has lost value, harvesting the loss can offset gains elsewhere in your portfolio.

Reporting bond interest on your tax return

Interest from Treasury bonds goes on Schedule B (Interest and Ordinary Dividends) of your Form 1040. If you have more than $1,500 in interest income, you must file Schedule B; otherwise, you can report it directly on the 1040.

Municipal bond interest is reported on Form 1040, but it is listed separately as tax-exempt interest. The IRS tracks it for information purposes, even though you do not owe federal tax on it. Some states require you to report municipal bond interest on your state return as well, even though it is not taxable there.

If you own bonds through a brokerage, the firm will send you a Form 1099-INT (for taxable interest) or Form 1099-OID (for original issue discount bonds) showing the interest you earned. Use these forms to complete your return. If the amounts on the form are wrong, contact the issuer or broker to request a corrected form.

Frequently Asked Questions

Are Treasury bonds completely tax-free?

No. Treasury bonds are exempt from state and local income tax, but you owe federal income tax on the interest. The exemption is only from state and local taxes, not from federal tax.

Can I avoid federal tax by buying municipal bonds?

Most municipal bond interest is exempt from federal tax, so yes — that is the main advantage. However, municipal bonds pay lower interest rates than taxable bonds, and you may owe state tax if you buy bonds issued in another state. The tax savings must be weighed against the lower yield.

What happens to savings bond interest if I do not cash them in?

Interest accrues and compounds, but you do not owe federal tax on it until you redeem the bond. You can hold Series EE bonds for up to 30 years before cashing them in, which allows you to defer the tax bill. State and local tax never applies to savings bond interest.

Does bond interest count toward my Medicare premiums?

Yes. Bond interest is included in your Modified Adjusted Gross Income (MAGI), which determines whether your Medicare Part B and Part D premiums are higher than the standard amount. Higher MAGI can trigger surcharges for high-income beneficiaries.

Can I use a bond loss to offset other investment gains?

Yes. If you sell a bond at a loss, you can use that loss to offset capital gains from other investments. If losses exceed gains, you can deduct up to $3,000 of ordinary income per year, with unused losses carried forward. Avoid buying the same bond within 30 days to prevent the wash-sale rule from disallowing the loss.