How your Utah paycheck is calculated
Utah income tax withholding (4.45%)
Employers use the Utah Schedule for your pay period and filing status (Pub 14). Line 2 is wages × 4.45%; line 3 is the base allowance (for example $19 biweekly Single / $37 Married); line 4 is wages minus the threshold ($360 / $719 biweekly); line 5 is that excess × 1.3%; line 6 is the remaining credit; line 7 is tax. Publication 14 examples round the multiplicative lines to whole dollars. Official example: $400 weekly Single → $12; $2,600 biweekly Single → $116; $1,200 semimonthly Married → $18; $7,800 monthly Married → $347.
Filing status
Use Married for married employees. Single covers single filers; Publication 14 tells employers to use the Single column for head of household.
Pre-tax deductions
Traditional 401(k) and Section 125 contributions reduce Utah taxable wages for income-tax withholding in this calculator, consistent with wages subject to federal withholding that Utah starts from.
Federal income tax, Social Security and Medicare
Federal withholding uses the IRS 2026 percentage method for automated payroll systems (Publication 15-T, Worksheet 1A). Social Security is 6.2% of wages up to the $184,500 wage base, and Medicare is 1.45% of all wages plus 0.9% Additional Medicare Tax on wages above $200,000. Per-paycheck Social Security and Medicare are shown as a yearly average: if you pass the wage base, your later paychecks will show none.
What this calculator does not include
This estimate does not cover bonuses or other supplemental wages, multiple jobs, Roth (after-tax) contributions, HSA payroll contributions, wage garnishments, or tips and overtime deductions unless you enter them on Form W-4 Step 4(b). Publication 14 wage-bracket lookup tables can differ by a dollar from the schedule formula because of table banding; this calculator uses the schedule method with whole-dollar line rounding matching the official examples. Nonresident and temporary-work exclusions are not modeled. See the methodology for details.
Frequently asked questions
What is the Utah withholding rate in 2026?
Publication 14 (Rev. 4/26) uses 4.45% of Utah taxable wages for pay periods beginning on or after June 1, 2026, before subtracting the base-allowance credit.
How does the Utah base allowance work?
Each schedule lists a base allowance and a wage threshold. The credit equals the base allowance minus 1.3% of wages over the threshold (not less than zero). Higher wages can fully erase the credit.
Does head of household get a separate Utah column?
No. Publication 14 says to use the Single column for taxpayers who file as head of household on their federal return.
Does this include Utah local taxes?
No. Utah has no general local wage tax in this calculator; only state income-tax withholding from Pub 14 is modeled.
How is federal income tax withholding calculated?
We follow Worksheet 1A of IRS Publication 15-T (2026) for a 2020-or-later Form W-4: your taxable pay is annualized, adjusted by the Form W-4 entries (Step 2 checkbox, Step 3 credits, Step 4 other income, deductions and extra withholding), run through the 2026 percentage-method table for your filing status, and divided back by your number of paychecks. Our engine reproduces all 4,350 cells of the IRS 2026 wage-bracket tables for weekly, biweekly, semimonthly and monthly pay.
Why does Social Security stop at $184,500?
For 2026 the Social Security (OASDI) wage base is $184,500 (SSA). The 6.2% employee tax applies only to wages up to that amount each year. Medicare (1.45%) has no cap, and employers must withhold an extra 0.9% Additional Medicare Tax on wages above $200,000 in the year, regardless of filing status.
Is withholding the same as the tax I will owe?
No. Withholding is an estimate taken from each paycheck. Your actual tax is settled when you file your return and depends on all your income, deductions and credits, so you may get a refund or owe more.
Official sources
- Utah State Tax Commission: Publication 14 — Withholding Tax Guide (Rev. 4/26, effective June 1, 2026)
- Utah State Tax Commission: Withholding
- IRS Publication 15-T (2026), Federal Income Tax Withholding Methods
- IRS Rev. Proc. 2025-32 (2026 tax brackets and standard deduction)
- SSA: 2026 Social Security wage base ($184,500)
- IRS Topic 560: Additional Medicare Tax