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This guide covers federal individual returns, with the 2025 Form 1040 and Schedule B instructions where a tax-year-specific threshold applies.
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What “refund interest” means
A tax authority can pay interest when it takes longer than expected to process a refund. The payment can accompany the refund check, direct deposit, or a later adjustment. The interest is compensation for the time the government held your money; it is not part of the tax you originally overpaid.
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IRS Topic 403, “Interest received,” lists interest on tax refunds as taxable interest. The payer may be the Internal Revenue Service or a state or local income-tax agency. A payer may issue Form 1099-INT showing the amount, but the reporting obligation does not depend on receiving that form.
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Interest is generally taxable in the year you receive it. If a state authority sends the refund in 2025 and the interest arrives in 2026, the interest belongs on the return for the year it was received, subject to the authority’s payment and reporting records.
Refund interest and the refund principal are different tax items
| Amount you receive | Federal treatment | Where it is handled |
|---|---|---|
| Interest paid because a refund was delayed | Taxable interest income in the year received | Combined with other taxable interest on Form 1040 or 1040-SR, line 2b |
| Refund of tax you previously paid | May have separate consequences, especially for a state or local income-tax refund tied to an earlier itemized deduction | Apply the recovery-of-deduction and tax-benefit rules; Publication 525 points to the applicable refund worksheet |
Do not report the entire deposit as interest. Separate the statement’s principal and interest amounts. The interest goes with taxable interest; the principal requires its own analysis.
How to report refund interest on a federal return
Use this process for a U.S. individual Form 1040 or Form 1040-SR.
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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitches- Identify the interest amount and payment year. Review the tax authority’s Form 1099-INT, refund notice, check stub, direct-deposit detail, or account transcript. Confirm which portion is labeled interest and the year it was paid.
- Collect all taxable-interest amounts. Include refund interest with interest from bank accounts, certificates of deposit, bonds, and other taxable sources reported for the same tax year. Do not include tax-exempt interest in the taxable-interest total.
- Report the combined taxable interest. Enter the total on Form 1040 or Form 1040-SR, line 2b, “Taxable interest.” The line is a total, not a separate line reserved for refund interest.
- Check whether Schedule B is required. For tax year 2025, the Schedule B instructions generally require Schedule B when taxable interest or ordinary dividends exceed $1,500. Schedule B can also be required when another condition listed in its instructions applies, even if the dollar amount is lower.
- Complete the supporting schedule when required. Schedule B, Part I lists interest payers and amounts and carries the total to the Form 1040 line. Follow the instructions for the return year you are filing; line numbers and thresholds can change.
- Retain the records. Keep the information statement and the refund calculation that shows the split between principal and interest. Those records support the amount reported if the tax authority’s statement and your bank deposit show different totals.
What if you did not receive Form 1099-INT?
You still must report taxable refund interest. IRS guidance says taxable interest must be reported even when a taxpayer does not receive Form 1099-INT or Form 1099-OID. A missing form does not make the interest tax-free and is not a reason to omit it from line 2b.
Use the most reliable amount available from the payer: a refund notice, online tax account, payment detail, or written statement. If a Form 1099-INT arrives later with a different amount, compare it with your records and follow the correction process for the return year involved rather than silently changing the principal amount.
A payer may report refund interest on Form 1099-INT, but IRS Topic 403 says it “may” be reported that way. Do not assume every interest payment will generate a form, and do not assume a form covers the entire refund deposit.
How the 2025 Schedule B threshold works
The 2025 instructions use more than $1,500 of taxable interest or ordinary dividends as a general Schedule B filing trigger. This is a filing threshold for the schedule, not a taxability threshold. The first dollar of refund interest remains taxable even when your total taxable interest is $1,500 or less.
- Total at or below $1,500: Schedule B may not be required under the dollar test, but review the other conditions in the 2025 instructions.
- Total above $1,500: Schedule B is generally required, along with the Form 1040 line 2b entry.
- Other listed circumstances: A filer below the dollar threshold may still need Schedule B if another instruction applies.
Use the instructions for the tax year on the return. A threshold printed in 2025 instructions should not be carried automatically to a 2024 or 2026 return.
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State and local refunds: analyze the principal separately
Publication 525 states that interest received on a state or local income-tax refund is interest income for the year received and belongs on the interest line. The returned tax itself is not automatically taxable merely because the accompanying interest is taxable.
The principal can be includible when you deducted state or local income taxes on an earlier federal itemized return and that deduction reduced your federal tax. This is the tax-benefit or recovery-of-deduction issue. Publication 525 directs taxpayers to the relevant refund worksheet to determine how much, if any, of a recovered deduction belongs in income.
If you did not itemize, or the deduction did not provide a federal tax benefit, the principal may have a different result. The conclusion depends on the earlier return and the deduction’s actual tax benefit, so do not use the interest rule as a shortcut for the principal.
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Example: state refund with interest
Suppose a state sends $2,000 of previously paid tax plus $35 of interest. Report the $35 with other taxable interest on Form 1040 line 2b for the year you received it. Evaluate the $2,000 under the recovery-of-deduction rules using the prior federal return; do not enter the full $2,035 as interest.
Federal, state, and local filing are not the same question
The federal rule is established by IRS Topic 403, Form 1040 instructions, and Publications 525 and 550. State and local return treatment is jurisdiction-specific. A state may use a different line, require an adjustment, or follow a rule that does not mirror the federal calculation.
When preparing a state return, read that jurisdiction’s current instructions for interest received from a tax refund and for recovery of a prior state-tax deduction. Do not assume that entering the amount on federal line 2b tells you where it belongs on a state return.
Worked reporting examples
Example 1: Small federal refund-interest payment
You receive a federal refund containing $18 of interest and have $420 of bank interest. Your taxable-interest total is $438. Report $438 on Form 1040 line 2b. The $18 is taxable even though it is small and no Schedule B dollar threshold is met.
Example 2: Form 1099-INT is issued
A state tax agency sends a Form 1099-INT for $64 of refund interest. Combine $64 with your other taxable interest for the year and enter the total on line 2b. Keep the form with your records; it identifies the payer and amount but does not turn the refund principal into interest.
Example 3: No information form arrives
A local tax authority pays $27 of interest with a refund but does not issue Form 1099-INT. You still include $27 in your taxable-interest total. Use the authority’s payment record or account statement to substantiate the amount.
Example 4: Schedule B becomes necessary
Your 2025 taxable interest is $1,620, including $40 of refund interest, and your ordinary dividends are $300. Because taxable interest or ordinary dividends exceed $1,500, review and generally file Schedule B under the 2025 instructions. Report the $1,620 total on Form 1040 line 2b; Schedule B provides the payer-by-payer detail.
Example 5: State principal requires a prior-year review
You receive $900 of state-tax principal and $22 of interest. The $22 is current-year taxable interest. Whether any part of the $900 is income depends on your earlier federal itemized deduction and the tax benefit it produced; use the Publication 525 worksheet rather than treating all $922 alike.
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Start with the document that explains the payment, not merely the amount credited to your bank account. A notice may show the tax overpayment, an interest calculation, and the total disbursement as separate figures. A direct-deposit description can show only one combined amount, so retain the notice or online account detail that provides the breakdown.
Check the payer’s name and the tax period as well as the payment date. The tax period tells you which return generated the refund; the payment date determines the year in which the interest is generally reported. A refund tied to a 2024 return but paid in 2025 can therefore produce interest income on your 2025 return.
If the authority makes more than one payment, keep each notice. Add the interest portions paid during the same calendar tax year, even when the payments relate to different tax periods. Do not add principal from one payment to interest from another simply because they arrived together.
When the amount on a form does not match your records
Compare the Form 1099-INT, refund notice, and payment record line by line. Differences can reflect separate payments, a corrected statement, or interest paid in a different year. The objective is to report the taxable interest actually received for the return year and to preserve the documents that explain your calculation.
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If a payer issues a corrected Form 1099-INT, use the corrected amount and keep both versions. If you already filed using an earlier amount, follow the applicable correction process for that tax year; do not change the refund principal into interest to force the numbers to match.
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When no document clearly identifies the interest component, request a written payment detail from the tax authority or retrieve the account record. IRS Topic 403 permits reporting without a Form 1099-INT, but you still need a reasonable, supportable amount.
Taxable interest versus tax-exempt interest
Refund interest belongs with taxable interest. Other interest statements may include tax-exempt interest, which is tracked separately and should not be added to the taxable-interest total on line 2b. Review each statement’s classification before totaling amounts.
The fact that the underlying refund represents taxes you paid does not convert its interest into a tax-exempt item. The IRS specifically identifies interest on federal, state, and local tax refunds as an example of taxable interest. Conversely, the fact that a refund is from a state or local agency does not mean its principal and interest receive identical treatment.
Questions to answer before entering the number
- What portion of the payment is labeled interest?
- On what date did you receive that interest?
- Which tax authority paid it?
- Did the authority issue Form 1099-INT, and is it marked as corrected?
- What other taxable interest and ordinary dividends did you receive during that year?
- Does the 2025 Schedule B dollar test or another Schedule B condition apply?
- If the payment is a state or local refund, did you itemize and claim the related tax in an earlier federal return?
- Did that earlier deduction actually reduce your federal tax?
Answering these questions prevents the most common classification errors: using the refund year instead of the payment year, reporting the entire deposit as interest, or overlooking a prior-year tax-benefit calculation.
Common mistakes and how to avoid them
- Omitting interest because it is not on a form: The IRS requires taxable interest to be reported whether or not Form 1099-INT arrives.
- Reporting the whole refund as interest: Separate the interest payment from the returned tax principal.
- Treating $1,500 as a tax-free allowance: The 2025 amount is a Schedule B filing trigger, not an exemption from tax.
- Using the payment date incorrectly: Interest belongs to the tax year in which it was received, not necessarily the year of the original refund claim.
- Assuming a federal rule controls a state return: Check the instructions for the specific state or local jurisdiction.
- Applying an old line number or threshold: Use the Form 1040 and Schedule B instructions for the return year being prepared.
- Ignoring prior itemized deductions: A state or local refund principal can require a tax-benefit calculation even though its accompanying interest is straightforward taxable interest.
Records to gather before filing
- The refund check stub, direct-deposit detail, or tax-authority account record.
- Any Form 1099-INT or other statement identifying refund interest.
- Your total taxable-interest statements for the same tax year.
- The prior federal return showing whether you itemized and claimed state or local income taxes.
- The current-year Form 1040, Form 1040-SR, and, when applicable, Schedule B instructions.
These documents let you reconcile the deposit, report interest in the correct year, and analyze the principal separately.
Federal reporting checklist
- Find the refund’s separate principal and interest amounts.
- Confirm the year the interest was actually received.
- Add refund interest to every other taxable-interest amount for that year.
- Enter the combined taxable interest on Form 1040 or 1040-SR, line 2b.
- For a 2025 return, determine whether total taxable interest or ordinary dividends exceed $1,500 or another Schedule B condition applies.
- If the refund is from a state or local authority, evaluate the principal under the prior-deduction tax-benefit rules.
- Check the applicable state or local instructions separately.
- Keep the payer’s records and your calculations with the return documents.
What the IRS rule means in one sentence
Interest paid with a tax refund is taxable interest income reported for the year received, while the refunded tax itself remains a separate calculation.
Frequently Asked Questions
Is interest on a federal tax refund taxable?
Yes. IRS Topic 403 treats interest paid on a federal tax refund as taxable interest. Add it to your other taxable interest and report the total on Form 1040 or Form 1040-SR, line 2b, for the year received.
Is interest on a state or local tax refund taxable federally?
Yes. Interest paid by a state or local tax authority is taxable federal interest for the year received. The state or local refund principal is separate and may require a tax-benefit analysis.
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Do I report refund interest if I did not get Form 1099-INT?
Yes. Taxable interest must be reported even when no Form 1099-INT or Form 1099-OID arrives. Use the refund notice, payment detail, or account record to determine the amount.
Does the $1,500 Schedule B threshold make small refund interest tax-free?
No. For 2025, more than $1,500 of taxable interest or ordinary dividends generally triggers Schedule B. It is a filing requirement, not an exemption; every dollar of taxable refund interest remains taxable.
Which tax year includes refund interest?
Include it in the year you actually received the interest. The year of the underlying refund claim or tax period can be different from the payment year.
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No. Separate the returned tax principal from the interest. Report only the interest with taxable interest on line 2b; analyze a state or local principal separately under recovery-of-deduction rules.
Can state reporting differ from federal reporting?
Yes. State and local return treatment is jurisdiction-specific. Check the current instructions for the authority involved rather than assuming the federal line 2b treatment applies.
What if a corrected Form 1099-INT arrives after filing?
Compare the corrected form with your payment records and follow the correction process for the return year. Keep the original and corrected statements and do not reclassify refund principal as interest.
The Bottom Line
Refund interest is taxable federal interest in the year received. Combine it with your other taxable interest on Form 1040 or 1040-SR line 2b, check the 2025 Schedule B rules, and analyze any state or local refund principal separately.
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