Whether government bonds are tax-free depends entirely on who issued them. Municipal bonds issued by state and local governments generally pay interest that is exempt from federal income tax. U.S. Treasury securities are the opposite pattern: taxable federally, but exempt from state and local income taxes. Savings bonds sit in a third category, letting you defer federal tax until redemption and, in some cases, escape it entirely if you use the proceeds for college. So the honest answer to whether government bonds are tax-free is “some of them, at some levels, under some conditions.”
U.S. Treasury Bills, Notes, and Bonds
Interest from Treasury bills, notes, and bonds is fully taxable as ordinary income on your federal return. You report it in the year you receive it or the year it’s credited to your account.1Internal Revenue Service. Topic No. 403, Interest Received Federal rates for 2026 run from 10% to 37% depending on your total taxable income.2Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
The offsetting benefit is a complete exemption from state and local income taxes. Federal law prohibits states from taxing obligations of the United States, and that includes the interest they pay.3Office of the Law Revision Counsel. 31 USC 3124 – Exemption From Taxation When you file your state return, you subtract Treasury interest from your income. In a state with a high income tax rate, that shield can meaningfully lift the after-tax yield of a Treasury above a corporate bond paying the same coupon.
One more federal-level cost to watch: Treasury interest counts toward the 3.8% Net Investment Income Tax if your modified adjusted gross income exceeds $200,000 (single) or $250,000 (married filing jointly).4Internal Revenue Service. Topic No. 559, Net Investment Income Tax Those thresholds aren’t indexed for inflation.
Municipal Bonds Issued by States and Localities
Municipal bonds, or “munis,” come the closest to genuinely tax-free. Interest on bonds issued by states, cities, counties, school districts, and special authorities like water and transit agencies is excluded from gross income for federal tax purposes.5Office of the Law Revision Counsel. 26 USC 103 – Interest on State and Local Bonds You still report the interest on your federal return as an information item, but it doesn’t add to your taxable income.1Internal Revenue Service. Topic No. 403, Interest Received
In-State Versus Out-of-State
Buy a muni issued by your own state or a locality within it, and the interest is usually exempt from state and local income taxes as well. Investors call this “triple tax-exempt.” Buy a muni from a different state, and the federal exemption still applies, but your home state will generally require you to add that interest back into your state taxable income. For a resident of a high-tax state, that difference is often worth several tenths of a percent in after-tax yield.
No Net Investment Income Tax
Tax-exempt muni interest is also excluded from the 3.8% NIIT.4Internal Revenue Service. Topic No. 559, Net Investment Income Tax For an investor already above the NIIT thresholds, munis pull further ahead of Treasuries than the headline rates suggest.
When Municipal Bonds Are Not Tax-Free
Two categories of munis break the tax-free rule, and both can surprise investors who assume all state and local debt behaves the same way.
Private Activity Bonds and the AMT
Some munis finance projects where more than 10% of the proceeds benefit a private business rather than the general public. These are private activity bonds.6Office of the Law Revision Counsel. 26 USC 141 – Private Activity Bond; Qualified Bond Common examples include bonds for privately managed airports, stadium financing, and certain housing developments. Qualified private activity bonds pay interest that is still exempt from regular federal income tax, but that interest is a preference item for the Alternative Minimum Tax.7Office of the Law Revision Counsel. 26 USC 57 – Items of Tax Preference
The AMT catches fewer taxpayers than it used to, since Congress permanently raised the exemption amounts. But a large position in these bonds combined with other AMT preference items can trigger the tax. Offering documents and brokerage statements typically flag whether a bond is AMT-subject.
Taxable Municipal Bonds
Some munis are issued as fully taxable securities by design. Build America Bonds, issued between February 2009 and December 2010 under a federal stimulus program, are the best-known example; the issuing municipality received a direct federal subsidy in exchange for the taxable status.8Internal Revenue Service. Lesson 10 Build America Bonds26 USC 103 – Interest on State and Local Bonds
Series EE and Series I Savings Bonds
Savings bonds behave differently from marketable Treasuries. Interest accrues monthly, but you don’t owe federal tax on it until you cash the bond in or it reaches final maturity, whichever comes first. You can elect to report the interest annually as it accrues, though most holders don’t.1Internal Revenue Service. Topic No. 403, Interest Received As Treasury obligations, savings bonds are also exempt from state and local income taxes.3Office of the Law Revision Counsel. 31 USC 3124 – Exemption From Taxation
The deferral gives you some control over timing. Cashing in during a year when you’re in a lower federal bracket, such as early retirement, reduces the tax hit on accumulated interest.
The Education Savings Bond Exclusion
Interest on Series EE and I bonds can be fully excluded from federal income tax if you use the redemption proceeds for qualified higher education expenses such as tuition and required fees.9TreasuryDirect. Using Bonds for Higher Education The bonds must have been issued after 1989, and the owner must have been at least 24 at the time of purchase. To exclude all the interest, the full redemption (principal plus interest) has to go toward qualified expenses.10TreasuryDirect. FS Publication 0051 – Education Savings Bond Program
The exclusion phases out at higher incomes. For 2026, phase-out begins at modified adjusted gross income of $152,650 (joint) or $101,800 (other filers) and ends at $182,650 (joint) or $116,800 (other filers).11Internal Revenue Service. Rev. Proc. 2025-32 The claim goes on IRS Form 8815.9TreasuryDirect. Using Bonds for Higher Education
TIPS and Zero-Coupon Treasuries: The Phantom Income Trap
Treasury Inflation-Protected Securities pay a fixed coupon on a principal balance that adjusts with the Consumer Price Index. Both the semiannual interest and the annual increase in principal are taxed federally in the year they occur, even though you don’t receive the principal adjustment as cash until maturity.12TreasuryDirect. Treasury Inflation-Protected Securities (TIPS) That’s phantom income: a federal tax bill on money not yet in your pocket. The state and local exemption still applies.
Treasury STRIPS and other zero-coupon Treasuries have the same problem. You pay no periodic interest but must report a portion of the original issue discount as taxable interest each year.13TreasuryDirect. Separate Trading of Registered Interest and Principal of Securities (STRIPS) The state exemption survives, but the annual federal drag is real. Many advisors suggest holding TIPS and STRIPS in tax-advantaged accounts for that reason.
Zero-coupon municipal bonds work more favorably. The accreted OID keeps its tax-exempt character each year, though you must still adjust your cost basis upward as the discount accretes.
Tax-Free Interest Doesn’t Mean Tax-Free Profits
Every exemption above applies to interest income only. Sell a bond before maturity for more than your adjusted cost basis and the gain is taxable, even on a muni. Held one year or less, the profit is a short-term capital gain taxed at ordinary rates. Held longer, it qualifies for long-term capital gains rates of 0%, 15%, or 20% depending on your income.14Internal Revenue Service. Topic No. 409, Capital Gains and Losses Investors who assume “tax-free bond” means “tax-free everything” get caught by this at sale.
Quick Reference by Bond Type
- Treasury bills, notes, and bonds: taxable federally, exempt from state and local tax, subject to NIIT for high earners.
- TIPS: same as other Treasuries, with the annual inflation adjustment taxed federally before you receive it.
- Treasury STRIPS: state-exempt, but you owe federal tax each year on accrued OID.
- Series EE and I savings bonds: federal tax deferred until redemption or maturity, state exempt, potentially fully excludable for qualifying education expenses.
- In-state municipal bonds: generally exempt from federal, state, and local income tax, and from NIIT.
- Out-of-state municipal bonds: federal-exempt and NIIT-exempt, usually taxed by your home state.
- Private activity bonds: exempt from regular federal income tax, but interest is an AMT preference item.
- Taxable municipal bonds (including Build America Bonds): fully taxable at all levels.
The narrowest honest description of a truly tax-free government bond: a municipal bond issued in your own state, not a private activity bond, held to maturity, with no AMT exposure. Everything else is a partial exemption at best.