Taxes on Treasury Bonds — A Complete Guide for 2026

How Treasury Bonds Are Taxed — The Basics

U.S. Treasury bonds (T-bonds, T-notes, T-bills, and savings bonds like I Bonds and EE Bonds) have a unique tax advantage: interest is subject to federal income tax but exempt from state and local income taxes.

This makes Treasuries especially attractive for investors living in high-tax states like California, New York, or New Jersey — where combined state and local rates can exceed 10%.

Federal Tax on Treasury Bond Interest

What's taxable?

• Interest income from T-bonds, T-notes, and T-bills — taxed as ordinary income
• I Bond and EE Bond interest — taxed at your marginal federal rate
• Capital gains if you sell a bond before maturity at a profit

What's NOT taxable?

• Return of principal — getting your money back isn't income
• State and local taxes — Treasury interest is fully exempt

Your effective tax rate

Treasury interest is taxed at your marginal federal income tax rate:

Example calculation

$10,000 in a 1-Year T-Bill yielding 4.5%:

• Interest earned: $450
• Federal tax (24% bracket): $108
• State tax: $0
• Net interest: $342

Compare that to a CD at the same rate where you'd also owe state tax — in New York, that's an extra ~$36.

Reporting Treasury Bond Income

Form 1099-INT

You'll receive a 1099-INT from TreasuryDirect or your brokerage showing:

• Box 3: Interest from U.S. Savings Bonds and Treasury obligations
• This amount goes on your Schedule B and then Form 1040

When is interest reported?

I Bonds and EE Bonds — the deferral advantage

With savings bonds, you can defer reporting interest until redemption. This means:

• No tax until you cash them in
• Interest compounds tax-free in the meantime
• You choose when to trigger the tax event

This deferral can be worth thousands over a 20-30 year holding period.

Tax-Exempt Uses of Savings Bonds

Education tax exclusion

If you use I Bond or EE Bond proceeds to pay for qualified higher education expenses, the interest may be completely tax-free at the federal level. Requirements:

1. Bonds must be purchased by someone age 24 or older
2. Used for tuition and fees at an eligible institution
3. Your modified adjusted gross income must be below the annual threshold (~$100,800 single, ~$158,650 married filing jointly for 2025)
4. You must be the bond owner (not the child)

This is one of the few ways to earn completely tax-free interest on a U.S. government security.

State Tax Exemption — How Much Does It Save?

The state tax exemption is automatic, but here's what it's worth in practice:

Bottom line: If you live in a high-tax state, Treasuries' tax advantage is significant. If you're in a no-income-tax state, it doesn't matter.

Treasury Bonds vs Other Investments — Tax Comparison

Tax-equivalent yield

To compare Treasuries with fully taxable investments, calculate the tax-equivalent yield:

Formula: Treasury Yield ÷ (1 − State Tax Rate)

Example: A Treasury yielding 4.5% in a state with 8% income tax:

• Tax-equivalent yield: 4.5% ÷ (1 − 0.08) = 4.89%
• A CD would need to yield 4.89% to match the Treasury's after-tax return

Tax Strategies for Treasury Bond Investors

1. Tax-loss harvesting with bonds

If you hold Treasury bonds in a brokerage and their market value drops (due to rising rates), you can sell at a loss to offset other capital gains.

2. Timing redemptions

With I Bonds and EE Bonds, you control when to trigger the tax. Consider cashing them in during years when your income is lower (retirement, sabbatical, career change).

3. Laddering for tax smoothing

Instead of redeeming a large lump sum, build a bond ladder so interest income is spread across multiple tax years.

4. Using retirement accounts

Hold Treasuries in an IRA or 401(k) to defer all taxes until withdrawal (traditional) or eliminate them entirely (Roth).

5. Education planning with savings bonds

Buy I Bonds or EE Bonds for future education expenses to potentially get 100% tax-free returns.

Common Mistakes

❌ Forgetting to report savings bond interest when you redeem them after many years — the IRS gets a copy of your 1099 too

❌ Assuming all bonds are state-tax-exempt — only U.S. Treasury obligations qualify, not agency bonds or corporate bonds

❌ Not considering the education exclusion — many eligible families miss this benefit

❌ Ignoring the deferral option — paying tax annually on I Bonds when you could defer until redemption

Inherited Treasury Bonds

When you inherit Treasury bonds:

• Interest accrued before death is reported on the decedent's final return (or estate return)
• Interest after inheritance is your taxable income
• Step-up in basis applies to marketable Treasuries bought on the secondary market
• Savings bonds — the beneficiary reports all unreported interest at redemption (unless the estate already reported it)

Tracking Bond Taxes with Freenance

Managing the tax implications of a bond portfolio requires careful record-keeping.

Freenance automatically:

• Tracks accrued interest across all your Treasury holdings
• Calculates tax impact based on your bracket
• Compares after-tax yields across different investment types
• Monitors redemption timing for optimal tax efficiency
• Consolidates your portfolio so you see the full picture

Stay on top of your bond tax obligations without the spreadsheet headaches.

Summary — Taxes on Treasury Bonds

Key takeaways:

• Federal tax applies to all Treasury interest at your marginal rate
• No state or local tax — a real advantage in high-tax states
• Savings bonds allow deferral — don't pay tax until you redeem
• Education exclusion can make savings bond interest 100% tax-free
• Report via 1099-INT — Box 3 for Treasury interest

Treasury bonds are among the most tax-efficient fixed-income investments available to U.S. investors. The state tax exemption alone can add 0.5–1% to your effective yield compared to CDs or corporate bonds.

Recommendation: Factor in your state tax rate when comparing Treasury yields to other options — the after-tax difference is often larger than you think.