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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchYes. For federal income-tax purposes, the extra amount paid with a delayed tax refund is generally taxable interest income. The refund itself returns tax you previously paid; the separate interest amount is income received because the government held your money longer. Report the interest for the tax year in which you receive it or it becomes available to you, even if no Form 1099-INT arrives.
The rules below explain the federal treatment of federal, state and local refund interest, where the amount belongs on your return, why information-reporting thresholds do not create a tax-free allowance, and how to handle a missing form. State income-tax treatment of the same interest can differ, so check the tax authority for your state.
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Refund principal and refund interest are different items
A tax refund has two components when a taxing authority adds compensation for a delay:
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Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →| Amount | What it represents | Federal treatment |
|---|---|---|
| Refund principal | Tax previously paid that is being returned | Generally a return of your own money, not new interest income |
| Interest on the refund | An additional amount paid because the authority delayed the refund | Taxable interest income when received or made available |
Internal Revenue Service Publication 17 (2025) states: “Interest you receive on tax refunds is taxable income.” IRS Topic 403, Interest received, describes interest that may be paid by federal, state or local tax authorities and says it may be reported on Form 1099-INT. The classification applies to the interest portion, not to the tax refund principal.
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Your notice, refund statement, account transcript or payment detail may show one combined deposit or separate lines. Use the authority’s breakdown to identify the interest amount. Do not report the entire refund as interest merely because the payment arrived in one check or electronic deposit.
Which tax year includes the interest?
Interest is generally taxable in the year you receive it. It is also taxable when it is credited to your account and available for withdrawal without penalty, even if you do not immediately transfer the money. This is the receipt-or-availability rule described by IRS Topic 403.
A payment received after year-end
Suppose a tax authority approves a refund in December but does not pay it until January. If the interest is not available to you until the January payment, it normally belongs on the return for the new year. The approval date or the year the original return was filed does not, by itself, determine the reporting year.
Interest credited before you withdraw it
If the authority credits interest to an account and you can withdraw it without a penalty, the amount can be taxable in that year even if you leave it in the account. Keep the payment notice and the date the funds became available so you can support the year you reported.
Use the instructions for the return year you are filing
Form lines and Schedule B instructions can change. The line references below come from the 2025 Form 1040 instructions; use the instructions issued for the specific tax year on your return rather than carrying a line number forward automatically.
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Where to report refund interest on a federal return
For federal filing, report taxable interest with your other interest income. IRS Publication 525 (2025) specifically directs taxpayers to report interest on state or local tax refunds for the year received on Form 1040, Form 1040-SR or Form 1040-NR, line 2b. The 2025 Form 1040 instructions identify line 2b as total taxable interest.
Federal refund interest
Interest paid by the Internal Revenue Service is also taxable interest. Add it to other taxable interest for the year and enter the total on the interest line required by that year’s Form 1040 instructions. If a tax software program asks for a 1099-INT entry, use the payer and amount information available from your IRS notice or account records; the obligation to report does not depend on having the form.
State and local refund interest
Interest paid with a state or local income-tax refund is included in federal taxable interest for the year you receive it. Publication 525’s 2025 guidance places that amount on line 2b of Form 1040, 1040-SR or 1040-NR. Your state may treat the amount differently on its own income-tax return. The federal sources cited here do not establish the law of every state, so consult the relevant state tax authority for that separate question.
Nonresident returns
Form 1040-NR uses the same line reference in the 2025 guidance for reporting this interest. Follow the rest of the nonresident-return instructions for your filing status and income sources.
Do you need a Form 1099-INT?
The payer’s obligation to send an information return and your obligation to report income are separate rules.
When a form may be issued
The January 2024 Instructions for Forms 1099-INT and 1099-OID say certain business-paid interest, including interest on state or federal income-tax refunds, is reportable by the payer at $600 or more. That is a payer-side information-reporting threshold. It does not mean smaller amounts are exempt from federal income tax.
If no form arrives
IRS Topic 403 says: “You must report all taxable and tax-exempt interest on your federal income tax return, even if you don’t receive a Form 1099-INT or Form 1099-OID.” If your interest is below the amount that triggers a form, the income is still reportable. If a form was expected but has not arrived, use the official payment information available to you and keep documentation showing how you calculated the amount.
If a form is wrong or duplicated
Compare the 1099-INT with the authority’s refund notice and your bank or tax-account records. A form that lists the refund principal as interest, duplicates a payment, or assigns the wrong tax year should be addressed with the payer. Do not knowingly enter the same interest twice simply because two records describe one payment.
When Schedule B is required
The 2025 Form 1040 instructions generally require Schedule B when taxable interest exceeds $1,500 or when another listed condition applies. Schedule B is a reporting form; it is not a tax exemption.
| Rule | Who it concerns | What it means for you |
|---|---|---|
| $600 threshold in the 1099-INT instructions (January 2024 revision) | Payer | May determine whether certain business-paid refund interest is reported to the IRS and recipient on Form 1099-INT |
| $1,500 threshold in the 2025 Form 1040 instructions | Taxpayer’s filing process | Generally determines when Schedule B is required, subject to other listed conditions |
For example, $500 of refund interest may be taxable even though it is below both thresholds; it may simply be reported directly with your taxable interest rather than on Schedule B, unless another Schedule B condition applies. Conversely, interest above $1,500 generally calls for Schedule B, even when no 1099-INT was received.
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A practical filing workflow
- Find the interest amount. Review the refund notice, payment statement, tax-account transcript or Form 1099-INT. Separate the principal refund from the additional interest.
- Determine the receipt year. Use the year the interest was paid, credited and available for withdrawal, not automatically the year the return was filed or the refund was approved.
- Combine taxable interest. Add refund interest to other taxable interest received during that year. Keep tax-exempt interest separate because it is reported differently, although IRS Topic 403 still requires tax-exempt interest to be reported.
- Enter the amount on the correct return line. Under the 2025 instructions, taxable interest goes on Form 1040, 1040-SR or 1040-NR, line 2b. Follow the line and form instructions for another tax year.
- Check Schedule B conditions. If taxable interest exceeds $1,500 or another listed condition applies, complete Schedule B as instructed. The absence of a 1099-INT does not remove this check.
- Retain support. Save the authority’s calculation, payment date, account records and any information return with your tax files. These records establish why only the interest portion was reported and why it belongs to that year.
- Review the state return separately. Federal treatment does not decide whether your state taxes the same interest. Read your state’s current instructions or contact its tax authority.
Examples that show how the rules work
Federal refund with a separately stated interest amount
You receive a federal refund check that identifies $4,000 as returned tax and $75 as interest. The $4,000 is the refund principal. The $75 is taxable federal interest for the year the check is received or the funds become available. Add $75 to your other taxable interest and report the total under the applicable Form 1040 instructions.
State refund interest with no 1099-INT
A state sends you a refund and identifies $40 of interest, but no Form 1099-INT arrives. The $40 remains taxable federal interest. Under the 2025 Publication 525 guidance, report it for the year received on line 2b of Form 1040, 1040-SR or 1040-NR. Do not treat the missing form as permission to omit it.
Interest received in a different year from the original return
You file a 2024 return, but a delayed refund and its interest are paid in 2025. The interest generally belongs on your 2025 return because that is when you received it or it became available. The tax year of the original return does not move the interest back to 2024.
Interest above the Schedule B threshold
You have $1,650 of total taxable interest for 2025, including $90 of refund interest. Because total taxable interest exceeds $1,500, the 2025 Form 1040 instructions generally require Schedule B, subject to the other conditions in those instructions. The $90 is still just one component of the total; do not report it twice.
Common mistakes and how to correct them
Reporting the entire refund as interest
Only the additional amount identified as interest is interest income. Reporting the principal again as interest overstates income. Recheck the authority’s payment breakdown before filing.
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Using the year the refund was expected
Taxability generally follows receipt or availability. A refund delayed across December and January can put the interest in the later year. Use the actual payment or credit date shown in your records.
Treating $600 as a taxpayer exemption
The $600 figure in the 1099-INT instructions concerns certain payer reporting duties. It is not a minimum amount below which you may omit taxable interest.
Skipping the income because no form arrived
IRS Topic 403 expressly requires reporting taxable interest without a Form 1099-INT or 1099-OID. Use reliable payment documentation and report the amount under the current return instructions.
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Assuming federal treatment controls state treatment
The federal sources establish federal reporting. They do not settle every state’s separate tax law. Check the state’s current guidance before preparing that return.
Using an old line number or threshold
Form layouts and instructions are time-sensitive. The line 2b and $1,500 references in this article are from the 2025 Form 1040 instructions. Confirm the instructions for the year you are filing.
What the historical $10 example does—and does not—mean
An IRS refund-interest FAQ for 2019 payments said the agency would send Form 1099-INT to recipients whose interest totaled at least $10. That was a historical, tax-year-specific information-mailing example. It is not a current general threshold and does not change the rule that taxable interest must be reported whether or not a form is issued.
Federal answer, state follow-up
The federal answer is straightforward: interest paid with a delayed tax refund is generally taxable interest income, reported in the year received or made available. Refund principal is not transformed into interest merely because it arrived late. For a complete filing, apply the current federal form instructions, distinguish taxpayer reporting from payer information reporting, and verify your state’s separate treatment with its tax authority.
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