Yes, Utah does tax Social Security benefits, but most retirees pay nothing on them. The state applies its flat 4.5% income tax to whatever portion of your benefits the IRS treats as taxable, then offers a nonrefundable Social Security benefit credit that cancels that tax dollar for dollar. The credit is full for single filers with modified adjusted gross income under $54,000 and joint filers under $90,000, and it phases out above those levels. Utah is one of only eight states that still include Social Security in taxable income at all.
What Utah Actually Taxes
Utah doesn’t run its own calculation on your benefits. It uses whatever amount already appears as taxable on line 6b of your federal Form 1040 or 1040-SR, which flows into your Utah return as part of federal adjusted gross income.1Internal Revenue Service. Publication 915 (2025), Social Security and Equivalent Railroad Retirement Benefits The IRS determines that amount using provisional income (AGI plus tax-exempt interest plus half your benefits) measured against thresholds that can make 0%, up to 50%, or up to 85% of your benefits taxable.2Office of the Law Revision Counsel. 26 USC 86 – Social Security and Tier 1 Railroad Retirement Benefits
Utah then applies a flat 4.5% rate to the full tax base for tax years beginning on or after January 1, 2025.3Utah State Tax Commission. Tax Rates So if $15,000 of your Social Security is federally taxable, Utah’s starting liability on that income is $675. Whether you actually pay the $675 depends on the credit described below.
The Credit That Usually Cancels the Tax
Utah’s Social Security benefit tax credit directly offsets the state tax on your federally taxable benefits. If you qualify for the full credit, you owe zero Utah tax on your Social Security.
Any Utah taxpayer, spouse, or dependent who received taxable Social Security retirement, disability, or survivor benefits during the year can claim it. There’s no minimum age. The only gate is income.
For tax years beginning on or after January 1, 2025, the credit begins phasing out at these modified AGI levels:4Utah Legislature. Taxation of Social Security Benefits
- Single filers: $54,000
- Married filing jointly: $90,000
- Head of household: $90,000
- Married filing separately: $45,000
Below your threshold, the credit covers 100% of the state tax on your benefits. These are higher than the 2024 limits of $45,000 single, $75,000 joint and head of household, and $37,500 married filing separately.
How the Phase-Out Works
Above the threshold, the credit shrinks by $0.025 for every dollar of MAGI over the line, or $25 per $1,000.4Utah Legislature. Taxation of Social Security Benefits The maximum credit itself equals your federally taxable benefits multiplied by 4.5%, so the income at which the credit disappears depends on how large your taxable benefit is.
A worked example. A single filer has $20,000 of federally taxable Social Security and a MAGI of $70,000:
- Maximum credit: $20,000 × 4.5% = $900
- MAGI over threshold: $70,000 − $54,000 = $16,000
- Phase-out reduction: $16,000 × $0.025 = $400
- Remaining credit: $900 − $400 = $500
Without the credit, the Utah tax on those benefits would be $900. With the partial credit, this retiree pays $400. At a MAGI of $90,000, the same filer’s credit would be completely gone: ($90,000 − $54,000) × $0.025 = $900, which matches the entire maximum credit.
A married couple filing jointly with $25,000 in taxable Social Security has a maximum credit of $1,125. Their credit holds out until MAGI hits $135,000 ($90,000 plus $1,125 ÷ $0.025). Retirees with smaller benefits lose the credit at lower incomes than those with larger benefits, because the smaller maximum credit erodes faster.
The credit is nonrefundable. It can reduce your Utah tax to zero but cannot generate a refund beyond what you owe.
When the Retirement Credit Is a Better Pick
Utah also offers a general retirement tax credit worth up to $450 per person, plus a separate military retirement credit. You can claim only one of the three on the same return. Choosing the Social Security credit locks you out of the other two.
For most retirees with meaningful Social Security income, the Social Security credit beats $450. But if your federally taxable benefits are small, the retirement credit may save more. A retiree with only $4,000 of taxable Social Security on line 6b has a maximum Social Security credit of $180 (4.5% of $4,000), well below the $450 retirement credit. Run both calculations before you file.
Claiming the Credit on Your Utah Return
Start with your finished federal return. The taxable Social Security amount on line 6b carries into your Utah Form TC-40 through federal AGI. Utah applies 4.5% to that base to produce your gross state tax.
To claim the credit, complete the Social Security Credit Worksheet in the TC-40 instructions. It compares your MAGI against the phase-out thresholds and figures any reduction. The resulting credit goes on Form TC-40A and feeds into the final calculation on the TC-40.5Utah State Tax Commission. TC-40 Instructions If you also qualify for the retirement or military credit, calculate each one and enter the one that saves you the most.
Paying a Balance Without Penalties
Utah does not require quarterly estimated payments. All state income tax for the year is due by the return due date, usually April 15 for calendar-year filers. Pay late and penalties accrue by the day, plus interest.
For retirees whose only income is Social Security and whose MAGI stays below the threshold, there’s usually no balance at all because the credit zeroes out the tax. The balance appears when other income (pensions, investment gains, part-time wages) pushes MAGI past the phase-out line and chips away at the credit.
If you expect to owe Utah tax on your Social Security, you can send a lump sum before the filing deadline or raise withholding from another income source such as a pension. The Social Security Administration lets you request voluntary federal withholding of 7%, 10%, 12%, or 22% from your monthly benefit, but that covers only federal tax, not Utah’s.6Internal Revenue Service. Social Security Income It still helps keep the combined April bill from being a surprise.