Utah for retirees: everything is taxed, then three credits give some of it back

A retiree filing a first TC-40 is usually surprised by it. Every dollar of the pension, the IRA withdrawal, the 401(k) distribution and the federally taxable part of Social Security is in federal AGI, and Utah taxes federal AGI at 4.45% with no retirement subtraction of any kind. What softens it is a set of nonrefundable credits. The Social Security benefits credit (TC-40A code AH) equals 4.45% of the taxable benefits, which wipes out the Utah tax on Social Security for a couple with modified AGI under $90,000 and a single person under $54,000, then fades out above those lines. The retirement credit (code 18) is $450 per person for anyone born on or before December 31, 1952, and fades out quickly. The military retirement credit (code AJ) is 4.45% of taxable military retirement pay with no income limit. A return may claim the Social Security credit or the military credit, but the $450 credit cannot be combined with either. On top of all of them sits the taxpayer tax credit, 6% of the federal standard deduction including the age-65 additions, which for a modest-income couple takes most of what is left.

A retired couple on Social Security and a mid-sized pension often owes Utah a few hundred dollars. A couple with a large IRA, or one doing Roth conversions, pays more than the flat rate suggests, because the extra income erodes two credits at once.

What is taxed

The credits are computed on the taxable amounts the federal return reports, not the gross. If $30,600 of a $36,000 Social Security benefit is taxed federally, $30,600 is what Utah taxes and $30,600 is the base of the credit.

The Social Security credit

Utah Code 59-10-1042 sets the credit at the tax rate times the Social Security benefits included in Utah taxable income. For 2026 that is 4.45% of the amount on line 6b of the 1040. Below the income lines the credit is exactly the Utah tax on the benefits, so the benefits are in effect untaxed. The lines are modified adjusted gross income, meaning Utah total income (federal AGI plus Utah additions) plus federally tax-exempt interest, of $54,000 single, $45,000 married filing separately, and $90,000 head of household or married filing jointly. Above the line the credit drops by 2.5 cents for each dollar of modified AGI. S.B. 71 of the 2025 session raised the lines from $45,000, $37,500 and $75,000, and they are not indexed, so they will stay where they are until the Legislature moves them again.

The 2.5-cent phase-out means the credit lasts for a while above the line. A couple with $17,900 of taxable benefits has a $797 credit; it falls to zero when modified AGI reaches $90,000 plus $797 divided by 0.025, which is $121,880. A couple with $40,000 of taxable benefits keeps some credit until about $161,200. In the phase-out zone every added dollar of income costs 4.45 cents of tax plus 2.5 cents of lost credit, plus 1.3 cents of lost taxpayer tax credit if that one is still phasing out too, for a marginal rate of 8.25 cents on the dollar.

The Tax Commission’s web page on this credit, as of this writing, still shows the pre-2025 thresholds and an old rate. Use the statute and the 2026 TC-40 instructions, not that page.

The $450 retirement credit

Utah Code 59-10-1019 gives $450 to each taxpayer born on or before December 31, 1952, so $900 to a couple who both qualify. The birth date is fixed in statute and does not move: in 2026 the youngest person who qualifies turns 74, and each year the pool shrinks. The credit is reduced by 2.5 cents for each dollar of modified AGI above $25,000 single, $16,000 married filing separately, or $32,000 joint or head of household, which puts it at zero at $43,000 of modified AGI for a single filer and $50,000 for a couple claiming one credit, or $68,000 for a couple claiming both. These thresholds are not indexed either (verify).

A return that claims code 18 cannot claim the Social Security credit or the military retirement credit. For almost everyone born in 1952 or earlier who draws Social Security, the Social Security credit is bigger: a single filer with $12,000 of taxable benefits gets $534 from code AH, more than the $450 maximum of code 18, and the AH income line is $54,000 instead of $25,000. The retirement credit still wins for a small group: someone under the $25,000 line whose Social Security is mostly nontaxable, so that 4.45% of the taxable portion is less than $450. Your preparer or software should compute both and take the larger.

The military retirement credit

The military retirement credit, Utah Code 59-10-1043, is the tax rate times the military retirement pay included in AGI: 4.45% for 2026, with no income limit and no age test. It covers survivor benefit plan payments to a retiree’s survivor. A retired master sergeant with $40,000 of military retirement pay gets a $1,780 credit, which is exactly the Utah tax on it. Social Security, IRAs and non-military federal retirement do not count. If you receive survivor benefits because a service member died on active duty, the military survivor benefits credit (code AA) applies instead. The military credit may be claimed together with the Social Security credit, but not with the $450 retirement credit.

The taxpayer tax credit and the age-65 addition

Retirees get the same taxpayer tax credit as everyone else: 6% of the federal standard deduction, phased out at 1.3 cents per dollar of Utah taxable income above $36,426 joint or $18,213 single (2025 figures; 2026 to come). Two things about it matter for seniors. The federal standard deduction includes the extra amount for age 65, $1,650 per married person and $2,050 for a single person for 2026, and that extra amount does flow into the Utah credit at 6%, worth $99 per spouse before phase-out. The $6,000 federal senior deduction enacted for 2025 through 2028 does not. It is a separate deduction below the AGI line, not part of the standard deduction, so it never reaches the Utah return and does not enter the credit. The same is true of the federal deductions for tips, overtime and car-loan interest, and of the 2026 charitable deduction for non-itemizers. The full mechanics of the credit are in How Utah income tax works.

Roth conversions, RMDs and the timing question

The example shows the Utah cost of a conversion: 4.45% on the converted amount, plus whatever credits the added income destroys. For a couple in the zone where both the taxpayer tax credit and the Social Security credit are phasing out, the marginal Utah rate on a conversion is 8.25%. Once the credits are gone, it is 4.45%. That argues for one of two patterns. Convert in years before Social Security starts, when there is no Social Security credit to lose and modified AGI is low. Or convert enough in one year to blow through both phase-outs rather than sitting in the 8.25% band for several years running. Either way, the conversion also raises federal AGI, which can raise Medicare premiums two years later through IRMAA and make more of the Social Security itself taxable.

Required minimum distributions are taxed like any other IRA withdrawal, at 4.45% and with no credit of their own. A qualified charitable distribution from an IRA is excluded from federal AGI and therefore from Utah income, which makes it the one way to give to charity that Utah rewards at the full rate: a $10,000 QCD saves $445 of Utah tax and preserves up to $130 of taxpayer tax credit and $250 of Social Security credit. A charitable gift deducted on Schedule A reaches Utah only as 6% of the itemized deduction.

Withholding and the April 15 test

Nobody withholds Utah tax from Social Security, and pension payers and IRA custodians withhold Utah tax only if asked. Utah has no quarterly estimated-payment schedule and no underpayment penalty, which sounds like good news until April. The rule is that 90% of this year’s Utah tax, or 100% of last year’s, must be paid in by April 15, 2027 through withholding or prepayments on Form TC-546 or through TAP. Miss it and the late-payment penalty and interest run from April 15 even if you file on the automatic October extension. A retired couple who owed $669 last year and will owe $4,559 this year because of a conversion needs $669 paid in by April 15 to be safe under the 100% test; a couple whose income rose for other reasons should prepay 90% of the new figure. Asking the pension payer to withhold a flat Utah amount is the simplest fix.

Relief outside the income tax

Utah’s help for seniors on property tax runs through the county, not the TC-40, with one exception noted below. The figures are from the Tax Commission’s Publication 36, revised September 2026, and the income limits are 2025 income tested in 2026; the 2026 limits are to come.

Household income for these programs counts Social Security and all retirement income in full. The renter refund is the one program filed with the Tax Commission rather than the county; its status shows on TAP.

Moving in, moving out

Federal law bars a state from taxing the retirement income of a former resident, so a pension earned elsewhere and paid to a new Utah resident is Utah’s to tax, and Utah taxes it. A Utah retiree who moves away stops owing Utah on the pension from the date domicile ends. In the move year the TC-40B apportions the full-year tax by the share of income received while a resident, so pension and IRA payments are allocated by the date received. The residency rules and the move-year return are in Moving to Utah.