A state tax refund is taxable on your federal return only if you itemized deductions in the year you paid the state tax and that deduction actually lowered the federal tax you owed. If you took the standard deduction, the refund is not taxable. If you itemized but the deduction didn’t save you anything beyond what the standard deduction would have, none of the refund is taxable either. When it is taxable, you owe only on the portion that produced a real benefit, capped at the refund amount.
When the Refund Is Not Taxable
The clearest case: you took the standard deduction the year you paid the state tax. You never deducted the payment, so getting some of it back isn’t income. The IRS has confirmed that taxpayers who chose the standard deduction “do not owe federal income tax on state tax refunds.”1Internal Revenue Service. IRS Issues Guidance on State Tax Payments Receiving a Form 1099-G doesn’t change that. The form just tells the IRS the state paid you money; it’s on you to determine whether any of it is income.2Internal Revenue Service. About Form 1099-G, Certain Government Payments
The refund is also not taxable if you itemized but your itemized deductions didn’t exceed the standard deduction available to you that year. This happens more often than people expect, especially when an amended return changes the math. If Worksheet 2 in Publication 525 produces zero on line 8, nothing is taxable.3Internal Revenue Service. Publication 525 – Taxable and Nontaxable Income
The Rule Behind the Math
The mechanism is the tax benefit rule in Section 111 of the Internal Revenue Code. A recovered amount is excluded from gross income to the extent the original deduction “did not reduce the amount of tax imposed.”4Office of the Law Revision Counsel. 26 USC 111 – Recovery of Tax Benefit Items If the deduction saved you money, the refund is income up to that savings. If the deduction did nothing for you, the refund is nothing to the IRS.
The same logic applies to other refunds tied to prior itemized deductions: real estate tax refunds, insurance reimbursements for medical expenses you deducted, recoveries of bad debts you wrote off, and casualty loss reimbursements received after you claimed the loss.3Internal Revenue Service. Publication 525 – Taxable and Nontaxable Income Recoveries of business expenses claimed on Schedule C or E are handled differently and are generally fully taxable; the itemized-versus-standard comparison only applies to Schedule A deductions.
How to Calculate the Taxable Portion
Worksheet 2 in Publication 525, “Recoveries of Itemized Deductions,” walks through the calculation.3Internal Revenue Service. Publication 525 – Taxable and Nontaxable Income The reference year is always the year the deduction was taken, not the year the refund arrived. The core steps:
- Pull your total itemized deductions from Schedule A of the prior-year return. On a 2025 return, that’s line 17.
- Subtract any amount already refunded for the same deduction in an earlier year, to avoid double-counting.
- Subtract the standard deduction you could have claimed that year. For 2025, that was $15,750 for single filers and $31,500 for married filing jointly. If itemized didn’t exceed standard, stop; nothing is taxable.5Internal Revenue Service. Standard Deduction and SALT Limitation
- The taxable recovery is the lesser of the refund itself or that excess of itemized over standard.
- If your taxable income in the deduction year was negative, reduce the taxable recovery by that negative amount.
A Worked Example
Single filer, 2025. You itemized $17,500 in deductions. The 2025 standard deduction for single was $15,750, so your itemized deductions exceeded standard by $1,750. In 2026 you receive a $2,400 state income tax refund for 2025.
Only $1,750 of the $2,400 is taxable. The other $650 didn’t buy you anything on your 2025 return, because the standard deduction would have covered it, so it stays out of income. If your 2025 taxable income was negative by $500, the taxable portion drops further to $1,250.
Use the Right Year’s Standard Deduction
Always compare against the standard deduction from the year of the deduction, not the year of the refund. If your refund relates to a 2024 return, use 2024 figures. For 2026 returns, the standard deduction is $16,100 for single, $32,200 for married filing jointly, and $24,150 for head of household.6Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One Big Beautiful Bill
The SALT Cap Changes the Picture
If your state and local taxes exceeded the SALT cap the year you deducted them, you didn’t deduct the full amount, so a refund partly returns money you never got a benefit for in the first place. Worksheet 2 handles this by telling you not to enter more on the refund line than the amount actually deducted.3Internal Revenue Service. Publication 525 – Taxable and Nontaxable Income For 2018 through 2025, the cap was $10,000 ($5,000 for married filing separately); it was raised beginning in 2026. If you paid $18,000 in state taxes but could only deduct $10,000 because of the cap, a $3,000 refund can be entirely nontaxable depending on the rest of the worksheet.
Refunds That Cover More Than One Year
When a refund relates to payments made across two tax years, split it proportionally. Publication 525 uses the example of three quarterly state estimated payments in 2024 and a fourth paid in January 2025: a later refund is allocated 75% to 2024 and 25% to 2025.3Internal Revenue Service. Publication 525 – Taxable and Nontaxable Income Run Worksheet 2 separately on the prior-year portion. The current-year portion isn’t a recovery at all; it just reduces this year’s deduction.
Where to Report It
A taxable state or local income tax refund goes on Schedule 1 (Form 1040), line 1.7Internal Revenue Service. Schedule 1 (Form 1040) 2025 – Additional Income and Adjustments to Income Other itemized-deduction recoveries (medical reimbursements, bad debt repayments, casualty recoveries) go on Schedule 1, line 8z as “Other income.” The Part I total flows to Form 1040, line 8.
If the amount you report is smaller than the figure on your 1099-G because Worksheet 2 reduced it, Publication 525 recommends attaching a copy of the calculation showing how you got there.3Internal Revenue Service. Publication 525 – Taxable and Nontaxable Income It heads off an automated mismatch notice.
What Happens If You Just Ignore the 1099-G
Don’t. The IRS lists “not including income on your tax return that was shown in an information return” as a specific example of negligence, and the accuracy-related penalty is 20% of the underpaid tax.8Internal Revenue Service. Accuracy-Related Penalty Even if the correct answer is zero, run the worksheet so you can show your work.
Keep the prior-year return, Schedule A, and your Worksheet 2 computation for at least three years after filing the return that reports the recovery. If you fail to report income exceeding 25% of gross income shown on your return, the IRS has six years to assess additional tax, so hold records longer in that situation.9Internal Revenue Service. How Long Should I Keep Records? Filing the prior-year Schedule A alongside the current return saves the common scramble to reconstruct itemized totals a year later.