Are State Refunds Taxable on Your Federal Return?

State tax refunds are taxable on your federal return only if you itemized deductions in the year you paid those state taxes and that deduction actually reduced your federal tax bill. If you took the standard deduction that year, as roughly 90% of filers do, your state refund is not federal income. If you itemized, some or all of the refund may be taxable, but the amount depends on how much your itemized deductions exceeded the standard deduction, not on the size of the refund itself.

When Your State Refund Is Not Taxable

The most common situation is simple. If you claimed the standard deduction on the federal return for the year the state taxes were paid, you never got a federal deduction for those taxes. A refund of taxes you didn’t deduct produces no federal income.¹ Your state will still send a Form 1099-G showing the refund, but for federal purposes you can leave that amount off your return.

Even itemizers sometimes owe nothing. If your itemized deductions barely exceeded the standard deduction that year, only a sliver of your refund could be taxable, and if the SALT cap kept you from deducting all your state taxes to begin with, the refund may escape tax entirely. The rule that governs both situations is the tax benefit rule.

The Tax Benefit Rule

Federal law at 26 U.S.C. § 111 says that when you recover an amount you previously deducted, you include it in income only to the extent that deduction actually reduced your tax.² Applied to state refunds, this means comparing your prior-year itemized deductions to the standard deduction you could have claimed instead. The spread between the two is the maximum portion of any refund that can be taxed.

For tax year 2025, the standard deduction was $15,000 for single filers and $30,000 for married couples filing jointly.³ The prior-year figure is what matters, because you’re measuring what itemizing actually saved you that year.

Calculating the Taxable Portion

The IRS provides a worksheet in the instructions for Schedule 1 (Form 1040), and Publication 525 covers the trickier cases.⁴ The core math is two steps. Subtract the prior-year standard deduction from your actual itemized deductions to get the tax benefit amount. Then compare that number to the refund. The taxable portion is whichever is smaller.

Refund Smaller Than the Tax Benefit

A single filer itemized $17,500 on a prior-year return when the standard deduction was $16,100. The tax benefit amount is $1,400. If the state refund was $900, the entire $900 is taxable. It sits below the $1,400 ceiling, so every dollar of it traces back to a deduction that lowered federal tax.

Refund Larger Than the Tax Benefit

A married couple filing jointly itemized $33,000 when the standard deduction was $32,200. The tax benefit amount is $800. They receive a $3,500 refund. Only $800 is taxable. The other $2,700 corresponds to deductions that didn’t push them past the standard deduction anyway, so no double benefit exists on that portion.⁴

This is where most overpayments happen. The 1099-G shows $3,500, and many filers assume the whole amount belongs on their return. It doesn’t.

How the SALT Cap Changes the Answer

The state and local tax deduction cap is $40,400 for single and joint filers in 2026 ($20,200 for married filing separately), up from the $10,000 cap that applied from 2018 through 2024.³ If your actual state and local taxes exceeded the cap that applied for that year, the excess was never deducted. A refund of taxes you never deducted is not taxable.⁵

Say a joint filer paid $48,000 in combined state income and property taxes for the prior year but could only deduct $40,400 because of the cap. That leaves $7,600 undeducted. If the state later refunds $5,000 of income tax, the entire refund falls within the undeducted portion and produces no federal income. It replaces money that never lowered federal tax in the first place.

Under the old $10,000 limit, high-tax-state filers hit the cap routinely. At the higher figure this happens less often, but it’s still worth checking if your combined state and local taxes ran above the ceiling.

If You Owed Alternative Minimum Tax

The alternative minimum tax disallows the state and local tax deduction entirely when calculating alternative minimum taxable income. So if you owed AMT in the year you claimed the state deduction, that deduction may have provided little or no net benefit, which reduces or eliminates the taxable portion of the refund.

The standard Schedule 1 worksheet doesn’t handle this. Publication 525 has a separate Worksheet 2 for filers who paid AMT in the prior year.⁴ Skipping it and reporting the full 1099-G amount often means overpaying.

Interest on a Late State Refund

Some states pay interest when they process refunds late. That interest is taxable federal income regardless of whether the refund itself is taxable. The state reports it on Form 1099-INT, and you include it as interest income.⁶ The tax benefit rule doesn’t reach the interest because the interest was never previously deducted.

Local and City Income Tax Refunds

The same rules apply to refunds of local or city income taxes. If you itemized and deducted local income taxes on Schedule A in the prior year, a refund is potentially taxable under the identical tax benefit analysis.⁷ Property tax refunds or rebates for a prior year follow the same pattern: include them in income only to the extent the original deduction actually reduced federal tax.

Sales Tax Alternative Cap

If you had the option to deduct either state income taxes or state general sales taxes on the prior-year Schedule A, the maximum taxable refund is capped at the difference between the two. Publication 525 gives an example where a filer could have deducted $10,000 in income taxes or $9,000 in sales taxes, chose income taxes, and received a $2,500 refund. Because the alternative sales tax deduction would have been $9,000, only $1,000 of the refund can be taxable, regardless of what the tax benefit calculation otherwise produces.⁴ Filers in states with both income and sales taxes should run this check.

Reporting on Your Federal Return

Your state sends Form 1099-G by January 31. Box 2 shows the total state or local income tax refund, credit, or offset paid to you during the calendar year, and the IRS gets a copy automatically.⁸

Box 2 is the gross refund, not the taxable amount. The state doesn’t run the tax benefit calculation for you. After you determine the taxable portion, report it on Schedule 1 (Form 1040), Line 1, labeled “Taxable refunds, credits, or offsets of state and local income taxes.”⁹ That total flows into your adjusted gross income.

Because the IRS matches the 1099-G against your return, entering zero on Line 1 when Box 2 shows a refund can trigger a notice. If your refund genuinely is not taxable after applying the tax benefit rule, you’re still correct to report zero or a reduced amount. Keep the prior-year return and your worksheet in case the IRS asks.

If Your 1099-G Is Wrong

If Box 2 doesn’t match what you actually received, contact your state tax agency and request a corrected form. If you can’t get one before the filing deadline, file using the correct amount you know you received.¹⁰ If a corrected form arrives later and you’ve already filed, you may need to amend using Form 1040-X.

1
Internal Revenue Service. IRS Issues Guidance on State Tax Payments
2
Office of the Law Revision Counsel. 26 U.S. Code 111 – Recovery of Tax Benefit Items
3
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill
4
Internal Revenue Service. Publication 525 (2025), Taxable and Nontaxable Income
5
Internal Revenue Service. Revenue Ruling 2019-11
6
Internal Revenue Service. Topic No. 403, Interest Received
7
Internal Revenue Service. Taxable Refunds, Credits or Offsets of State or Local Income Taxes
8
Internal Revenue Service. Instructions for Form 1099-G
9
Internal Revenue Service. Schedule 1 (Form 1040) 2025
10
Internal Revenue Service. What to Do When a W-2 or Form 1099 Is Missing or Incorrect