Do You Need to Report a California State Tax Refund?

A California state tax refund only needs to be reported on your federal return if you itemized deductions on the return where you originally paid that California tax, and only to the extent the deduction actually lowered your federal tax. If you took the standard deduction that year, none of the refund is federally taxable, even though the Franchise Tax Board will still send you a Form 1099-G for the full amount.

That single distinction resolves most of the confusion around reporting a California state tax refund on a federal return. The rest is arithmetic, and the IRS provides a worksheet to handle it.

Why the Prior Year’s Return Controls the Answer

The federal tax benefit rule, in 26 U.S.C. § 111, says that when you recover an amount you deducted earlier, you include the recovery in income only to the extent the original deduction actually lowered your tax.¹ A California refund is a recovery of state income tax you paid. If deducting that tax on Schedule A cut your federal bill, the refund is giving back money that already saved you tax, and the IRS wants its share.

If you claimed the standard deduction, the flat amount had nothing to do with what you paid California. Getting some of it back reverses no prior benefit, so the refund is not taxable and you can set the 1099-G aside for federal purposes.²

For itemizers, the taxable portion depends on three things: how much California tax you deducted, whether the SALT cap limited that deduction, and how far your total itemized deductions exceeded the standard deduction you could have taken instead.

How the SALT Cap Changes the Math

The cap that matters is the one in effect for the year you took the deduction, not the year you received the refund. From 2018 through 2024, the SALT cap was $10,000 ($5,000 if married filing separately). Starting with tax year 2025, it rose to $40,000 ($20,000 married filing separately), with a phase-down for taxpayers whose modified adjusted gross income exceeds $500,000 ($250,000 married filing separately) that never drops the cap below the old $10,000 floor.³⁴

Any state tax you paid above the cap was never deducted, so a refund of that overage carries no federal tax consequence. Suppose you paid $14,000 in California income tax in 2024 but could only deduct $10,000 because of the cap. If the FTB later refunds $2,000, only the portion tied to the $10,000 you actually deducted is potentially taxable. The $4,000 that exceeded the cap never touched your federal return.¹

Running the IRS Worksheet

The IRS provides a “State and Local Income Tax Refund Worksheet” in the Instructions for Form 1040.⁵ For more complicated recoveries, Publication 525 has an expanded version called Worksheet 2.⁶ The basic logic:

Start with the refund from your Form 1099-G, but cap it at the state income tax amount on your prior-year Schedule A, line 5d.
If your total state and local taxes paid exceeded the SALT limit on your prior-year Schedule A (line 5e), subtract that excess. If the result zeroes out the refund, nothing is taxable.
Compare your prior-year total itemized deductions (Schedule A, line 17) to the standard deduction you could have claimed that year. If your itemized deductions did not exceed the standard deduction, the refund is not taxable.
Your taxable refund is the smaller of the SALT-adjusted refund amount and the amount by which your itemized deductions exceeded the standard deduction.

That last step catches people out. If your 2024 itemized deductions came to $15,600 as a single filer against a $14,600 standard deduction, itemizing gave you only $1,000 more than the standard route. Even if California refunded you $3,000, only $1,000 of it is taxable, because $1,000 is the ceiling on the benefit you actually got from deducting those state taxes.⁶

Reading the 1099-G From the Franchise Tax Board

The FTB mails Form 1099-G to any taxpayer who itemized and received a California refund of $10 or more, and sends the IRS a matching copy.⁷ The form typically arrives in late January for refunds issued during the prior calendar year.⁸

Box 2 shows your gross refund. That is the starting number for the worksheet, not the taxable amount. Copying Box 2 straight onto Schedule 1 is one of the two common errors; assuming a refund is never taxable is the other.

If the form is missing or wrong, contact the FTB through your MyFTB account or by phone. The IRS cannot correct a state-issued 1099-G. Prior-year forms are also available electronically through MyFTB.⁹ If your refund was under $10, the FTB is not required to issue a 1099-G, but you still need to run the tax benefit calculation if you itemized. The absence of a form does not make the income unreportable.

Where the Taxable Amount Goes on the Return

Once the worksheet gives you a taxable figure, report it on Schedule 1 (Form 1040), Line 1, labeled “Taxable refunds, credits, or offsets of state and local income taxes.”¹⁰ That amount rolls into Schedule 1, Line 10, and then onto Form 1040, Line 8. Schedule 1 gets attached to your filed return.

Enter only the calculated taxable amount, not the full Box 2 figure. If the worksheet returns zero, you do not need to file Schedule 1 for this purpose, though other items on that schedule might still require it.

California Payments That Are Not Refunds

Some California payments look like refunds but are not. The Middle Class Tax Refund, distributed in 2022 and 2023, was not a refund of previously paid taxes despite the name. The IRS classified it as a general welfare and disaster relief payment and ruled that recipients do not need to include it in federal income.² It does not belong on Schedule 1, Line 1.

The 2021 Golden State Stimulus payments were also not taxable for California state income tax purposes,¹¹ and the IRS covered them in the same broad guidance treating multi-state relief payments as excludable from federal income.

The distinction turns on the payment’s character. A regular FTB refund reverses a prior tax payment and triggers the tax benefit rule. A one-time relief payment funded by the state budget and distributed based on income or residency was never deducted on any prior return, so there is no benefit to recover. If California issues a new one-time payment down the road, check for IRS guidance on that specific payment before assuming the refund rules apply.

What Happens If You Get It Wrong

Because the FTB sends the IRS a copy of every 1099-G it issues, the IRS matching program will flag a return that omits a refund it should have picked up. The IRS specifically lists failure to include income shown on an information return as an example of negligence.¹²

The accuracy-related penalty for negligence or a substantial understatement is 20% of the underpaid tax attributable to the error.¹² Interest also accrues on unpaid balances at 7% per year, compounded daily, as of early 2026, with the rate adjusting quarterly.¹³

Most errors are not intentional. A filer sees the 1099-G and reports the full Box 2 amount, overpaying. Or hears that state refunds aren’t taxable and reports nothing, underpaying. Running the worksheet resolves both. If you spot a mistake after filing, an amended return on Form 1040-X submitted before the IRS sends a notice can reduce or eliminate the penalty.

1
Internal Revenue Service. IRS Revenue Ruling 2019-11
2
Internal Revenue Service. IRS Issues Guidance on State Tax Payments
3
Internal Revenue Service. Topic No. 503, Deductible Taxes
4
Internal Revenue Service. How to Update Withholding to Account for Tax Law Changes for 2025
5
Internal Revenue Service. Instructions for Form 1040 – State and Local Income Tax Refund Worksheet
6
Internal Revenue Service. Publication 525, Taxable and Nontaxable Income
7
State of California Franchise Tax Board. January 2026 Mailing of Forms 1099-G and 1099-INT
8
Internal Revenue Service. Instructions for Form 1099-G
9
State of California Franchise Tax Board. 1099 Guidance for Recipients
10
Internal Revenue Service. Schedule 1 (Form 1040) – Additional Income and Adjustments to Income
11
California Franchise Tax Board. California Golden State Stimulus Payments
12
Internal Revenue Service. Accuracy-Related Penalty
13
Internal Revenue Service. Interest Rates Remain the Same for the First Quarter of 2026