How Treasury Bill Interest Is Taxed
How Treasury Bill Interest Is Taxed
Treasury bills can look simple from an investment standpoint. You generally buy a bill for less than its face value, hold it until maturity, and receive the full face value. The difference between what you paid and what you receive is generally treated as interest income for federal tax purposes. Unlike a bond that pays regular coupons, a Treasury bill normally does not send you periodic interest payments.
The tax treatment has an important advantage for many U.S. investors. Interest from Treasury bills is subject to federal income tax, but it is exempt from state and local income taxes. For a standard Treasury bill, the IRS says the interest is generally reported in Box 3 of Form 1099-INT.
If you are new to Treasury bills, our
Treasury Bills Explained
guide covers how T-bills work from purchase through maturity. This article focuses specifically on the tax side: when Treasury bill interest is generally reported, how the 1099-INT information is used, why state tax treatment is different, and which mistakes can create problems at tax time.
What You’ll Learn
- How federal income tax applies to Treasury bill interest.
- Why Treasury bill interest is generally exempt from state and local income taxes.
- How Treasury bill interest is reported in Box 3 of Form 1099-INT.
- When Treasury bill interest is generally included in taxable income.
- How Treasury bill tax treatment compares with CDs and other interest-bearing investments.
- Common Treasury bill tax-reporting mistakes and practical ways to avoid them.
Quick Answer: How Treasury Bill Interest Is Taxed
Key Takeaways
- Federal tax applies: Treasury bill interest is taxable as federal income.
- State and local exemption: Treasury bill interest is exempt from state and local income taxes.
- Box 3 reporting: Interest from Treasury bills is generally reported in Box 3 of Form 1099-INT.
- Maturity-year reporting: For a Treasury bill held to maturity, the IRS generally treats the interest as income when the bill is paid at maturity.
- No regular coupon: T-bills generally earn their return through the difference between the discounted purchase price and the face value received at maturity.
- 1099-INT is not the tax itself: You must report taxable interest even if you do not receive a Form 1099-INT.
Table of Contents
Treasury Bill Taxes at a Glance
Treasury bill tax rules are easier to follow when you separate federal tax from state and local tax. For a standard T-bill held to maturity, the discount between the purchase price and the face value received at maturity is generally treated as interest income. The IRS says Treasury bill interest is subject to federal income tax but exempt from state and local income taxes.
| Tax Point | What It Means |
|---|---|
| Federal income tax | Applies to Treasury bill interest. |
| State and local income tax | Treasury bill interest is generally exempt. |
| Form 1099-INT | Treasury bill interest is generally reported in Box 3. |
| Held to maturity | For a standard T-bill, interest is generally reported when the bill is paid at maturity. |
QUICK TAKE:
Treasury bills are subject to federal income tax, but their interest is exempt from state and local income taxes. For a standard T-bill held to maturity, the purchase-price discount becomes interest income when the bill is paid at maturity.
Treasury Bill Taxes: A Complete Beginner Guide
Treasury bills work differently from investments that send regular interest payments. A T-bill is generally purchased at a discount to its face value and pays the full face value when it matures. For example, if an investor pays $9,800 for a $10,000 Treasury bill and holds it to maturity, the $200 difference represents interest income. The IRS treats that interest as taxable for federal income tax purposes. Treasury bill interest is generally exempt from state and local income taxes.
1. Federal Income Tax Applies
The return you earn from a Treasury bill is generally included in federal taxable income. The fact that the return comes from the difference between the purchase price and face value does not make it federally tax-free. For a standard T-bill held to maturity, the IRS generally treats that difference as interest income.
2. State and Local Income Taxes Are Different
Treasury securities have a notable state-tax advantage. Interest from Treasury bills, notes, and bonds is subject to federal income tax but exempt from state and local income taxes. That difference can matter when comparing a T-bill with an investment whose interest is taxable at federal, state, and local levels.
3. The Tax Year Depends on What Happens to the Bill
If you hold a Treasury bill until maturity, the IRS generally says to report the interest when the bill is paid at maturity. If you buy a bill in one calendar year and it matures in the next, the interest is generally reported in the maturity year. If you sell the bill before maturity, the reporting can depend on the sale and the circumstances of the transaction.
4. Form 1099-INT Helps With Reporting
For Treasury bills, the interest is generally reported in Box 3 of Form 1099-INT. The form can help you identify the amount to include on your federal return. However, you are still responsible for reporting taxable interest even if you do not receive a Form 1099-INT.
How Treasury Bill Taxation Works
The tax treatment of a Treasury bill is easier to follow when you look at what happens from purchase to maturity. A standard T-bill is generally issued at a discount rather than with regular coupon payments. If you hold it until maturity, the difference between the discounted purchase price and the face value you receive is generally treated as interest income for federal tax purposes.
Step 1: You Buy the T-Bill at a Discount
Suppose, purely as an example, you pay $9,800 for a $10,000 Treasury bill and hold it to maturity. The $200 difference is generally treated as interest income. Your actual purchase price can be different because Treasury bills are priced through auctions or, when purchased in the secondary market, at the market price available at that time.
Step 2: The Bill Reaches Maturity
For a Treasury bill that you hold to maturity, the IRS generally says to report the interest income when the bill is paid at maturity. This means a bill purchased near the end of one calendar year but maturing in the following year will generally have its maturity interest reported in the later tax year.
Step 3: Federal Tax Applies, but State and Local Tax Does Not
Treasury bill interest is subject to federal income tax. At the same time, interest from U.S. Treasury bills, notes, and bonds is exempt from state and local income taxes. This distinction can affect the after-tax comparison between a T-bill and other interest-producing investments.
Step 4: Form 1099-INT Shows the Treasury Interest
Treasury bill interest is generally reported on Form 1099-INT, Box 3. That amount is included with your taxable interest income for federal tax reporting. You still have a responsibility to report taxable interest even if you do not receive a Form 1099-INT.
Benefits & Drawbacks of Treasury Bill Tax Treatment
Treasury bills are not free from federal tax, but their tax treatment has an important advantage. The interest is subject to federal income tax while remaining exempt from state and local income taxes. That distinction can be meaningful when comparing T-bills with other taxable interest investments.
Pros
- State and local tax exemption: Interest from Treasury bills is exempt from state and local income taxes.
- Clear federal reporting: Treasury bill interest is generally reported in Box 3 of Form 1099-INT.
- Potential after-tax benefit: Investors who would otherwise owe state or local income tax on interest can compare the T-bill’s tax-exempt state and local treatment when evaluating alternatives.
Cons
- Federal income tax still applies: The interest is not exempt from federal income tax.
- Tax reporting is still required: Taxable Treasury interest must be reported even if you do not receive Form 1099-INT.
- Early sale can require different tax treatment: If you sell a Treasury bill before maturity, the tax reporting can differ from the straightforward maturity treatment of a bill held until maturity.
QUICK TAKE:
The main tax benefit of a Treasury bill is its state and local income-tax exemption, not an exemption from federal tax. For a bill held to maturity, the federal tax reporting is generally straightforward; transactions involving a sale before maturity may require additional tax calculations.
Treasury Bills vs. Other Investments: Tax Comparison
The tax difference becomes clearer when a Treasury bill is compared with common bank savings products. Treasury bill interest is subject to federal income tax but exempt from state and local income taxes. By contrast, interest from ordinary bank accounts and CDs is generally taxable interest.
| Investment | Federal Tax | State & Local Tax | Typical 1099 Reporting |
|---|---|---|---|
| Treasury Bills | Taxable | Exempt | Form 1099-INT, Box 3 |
| Bank Savings Account | Taxable | Generally taxable | Form 1099-INT, generally Box 1 |
| Certificate of Deposit (CD) | Generally taxable | Generally taxable | Form 1099-INT, generally Box 1 |
| Bank Money Market Account | Generally taxable | Generally taxable | Generally Form 1099-INT |
This comparison is about general tax treatment, not the total return or risk of each investment. A money market fund is different from a bank money market account and may report distributions as dividends rather than interest, so investors should not treat the two products as interchangeable for tax-reporting purposes.
QUICK TAKE:
The key Treasury bill tax advantage is the state and local income-tax exemption. Federal tax still applies. When comparing investments, look at the after-tax return rather than comparing advertised interest rates alone.
Costs, Risks & Expert Tips for Treasury Bill Taxes
Treasury bill tax costs mainly come from federal income tax and the need to report the interest correctly. The interest is exempt from state and local income taxes, but that exemption does not remove the federal tax obligation. The bigger practical risks are missing taxable interest, using the wrong tax year, or overlooking information on your tax forms.
Tax Costs to Keep in Mind
- Federal income tax: Treasury bill interest is subject to federal income tax.
- State and local exemption: Treasury bill interest is exempt from state and local income taxes.
- Voluntary withholding: TreasuryDirect allows investors to request withholding from certain Treasury security interest payments. Any federal tax withheld is reported on Form 1099-INT and can be credited toward the investor’s federal tax liability.
Expert Tips for Cleaner Tax Reporting
- Keep your purchase records: Save transaction confirmations, purchase prices, maturity dates, and account statements so you can reconcile your tax documents.
- Check Box 3: Interest from Treasury bills is generally reported in Box 3 of Form 1099-INT rather than ordinary bank interest in Box.
- Check the tax year: For a Treasury bill held to maturity, the IRS generally says to report the interest when the bill is paid at maturity.
- Do not ignore missing forms: Taxable interest must still be reported even when you do not receive Form 1099-INT.
EXPERT TIP:
Do not compare Treasury bill rates with other investments using the headline rate alone. If you live in a state or locality with an income tax, the Treasury bill’s state and local tax exemption can affect your after-tax return.
Common Treasury Bill Tax Mistakes + Real-Life Example
Treasury bill tax mistakes often happen when investors confuse federal taxation with the state and local exemption, or assume the purchase date is automatically the tax-reporting date. A few simple checks can make the reporting process much easier.
Common Mistakes to Avoid
- Calling T-bill interest tax-free: Treasury bill interest is subject to federal income tax. The state and local income-tax exemption does not make the interest federally tax-free.
- Using the purchase year automatically: For a Treasury bill held to maturity, the IRS generally says to report the interest when the bill is paid at maturity.
- Looking in the wrong 1099 box: Treasury bill interest is generally reported in Box 3 of Form 1099-INT, not Box 1, which generally contains other taxable interest.
- Ignoring missing tax forms: Taxable interest still must be reported even if you do not receive Form 1099-INT.
- Assuming every purchase follows the same calculation: A T-bill held to maturity is relatively straightforward, but buying or selling a bill in the secondary market can involve additional tax considerations.
Real-Life Example: A $10,000 Treasury Bill
Illustrative example: Suppose an investor buys a $10,000 face-value Treasury bill for $9,800 and holds it until maturity. The investor receives $10,000 when the bill matures, creating a $200 difference between the purchase price and the maturity value.
For this simplified example, the $200 difference is generally treated as interest income. It is subject to federal income tax but exempt from state and local income taxes. For a Treasury bill held to maturity, the interest is generally reported for the year in which the bill is paid at maturity, and the amount is generally shown in Box 3 of Form 1099-INT.
QUICK TAKE:
Keep your Treasury transaction confirmation, maturity information, and Form 1099-INT together. If the bill was purchased or sold outside a straightforward maturity transaction, keep the purchase and sale records as well because additional tax rules may apply.
Who Should Consider Treasury Bills?
Treasury bills may be relevant for investors who are looking at short-term U.S. Treasury securities and want to understand how the tax treatment affects their results. The main tax feature is straightforward: Treasury bill interest is subject to federal income tax but exempt from state and local income taxes.
The Tax Treatment May Matter Most To:
- Investors subject to state or local income tax: The Treasury exemption can be relevant when comparing the after-tax income from different investments.
- Investors focused on short-term holdings: Treasury bills generally mature within one year, with common terms including 4, 8, 13, 26, and 52 weeks.
- Investors who want clear tax records: Treasury bill interest is generally reported on Form 1099-INT in Box 3.
- Investors comparing taxable alternatives: The state and local tax exemption can be one factor when comparing T-bills with bank interest or other taxable income.
When Should You Get Extra Tax Guidance?
Extra care may be appropriate if you buy or sell Treasury bills in the secondary market, purchase a bill at a premium, or have tax circumstances that require special treatment. The IRS has separate rules for discounted debt instruments and dispositions, so a straightforward maturity example should not be applied automatically to every T-bill transaction.
Frequently Asked Questions About Treasury Bill Taxes
1. Do you pay federal tax on Treasury bills?
Yes. Interest income from Treasury bills is subject to federal income tax. Treasury bills are not federally tax-free investments.
2. Are Treasury bills exempt from state income tax?
Yes. Interest from U.S. Treasury bills is exempt from state and local income taxes. The federal income tax still applies.
3. Where is Treasury bill interest reported on Form 1099-INT?
Treasury bill interest is generally reported in Box 3 of Form 1099-INT. IRS instructions specifically include Treasury bills among the U.S. Treasury obligations reported in Box 3.
4. When do you report Treasury bill interest?
For a Treasury bill held to maturity, the IRS generally says to report the interest when the bill is paid at maturity. If the bill is purchased in one calendar year and matures in the next, the interest is generally reported in the maturity year.
5. Do Treasury bills pay interest every month?
No. Treasury bills generally do not make periodic coupon payments. They are generally issued at a discount, and the difference between the discounted purchase price and the face value received at maturity is interest income.
6. What if I do not receive a Form 1099-INT for my Treasury bill?
You still must report taxable interest income. The IRS says taxable interest must be reported even when Form 1099-INT is not received. Keep your Treasury transaction records and contact the payer if an expected form is missing.
7. Is Treasury bill interest tax-free if I live in a state with income tax?
No. Treasury bill interest is exempt from state and local income taxes, but it remains subject to federal income tax.
8. Is Treasury bill tax treatment the same if I sell before maturity?
Not necessarily. The simple maturity rule discussed in this article applies to a Treasury bill held until maturity. Selling before maturity can involve additional tax rules, so the straightforward maturity calculation should not automatically be applied to an early sale.
Final Verdict: How Treasury Bill Interest Is Taxed
Treasury bill tax treatment becomes easier to understand when you separate federal taxation from the state and local exemption. Interest from Treasury bills is subject to federal income tax, but the interest is exempt from state and local income taxes. For a standard T-bill held to maturity, the difference between the discounted purchase price and the face value received at maturity is generally treated as interest income.
For tax reporting, Form 1099-INT generally shows Treasury bill interest in Box 3. If a bill matures in a different tax year from the purchase year, the interest is generally reported when the bill is paid at maturity. This reporting requirement also applies if you reinvest the maturity proceeds into another Treasury security.
Treasury bill interest is not completely tax-free. Federal income tax applies, while the interest is exempt from state and local income taxes. Keep your purchase, maturity, and tax forms together, and pay extra attention to the tax year when a T-bill crosses calendar years or is sold before maturity.
Have a Money Question? Keep Exploring.
Money and tax questions often become easier when you have the right information in front of you. Keep your investment records organized, review the applicable tax guidance, and explore related Treasury bill topics before making financial decisions.
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