Iowa Paycheck Calculator 2026

Iowa Payroll Tax Overview

Iowa uses a flat state income tax rate of 3.8% on all taxable wages. Unlike graduated-bracket states, every dollar you earn in Iowa above the standard deduction is taxed at the same 3.8% rate. This makes Iowa paycheck calculations straightforward and predictable.

On top of state income tax, workers in Iowa also pay federal income tax (10%–37% graduated brackets), Social Security (6.2% up to the $176,100 wage base), and Medicare (1.45%, or 2.35% above $200,000 for high earners). Pre-tax deductions like 401(k) and health insurance reduce both federal and state taxable income.

The 2026 federal income tax brackets for single filers: 10% on the first $11,925; 12% to $48,475; 22% to $103,350; 24% to $197,300; 32% to $250,525; 35% to $626,350; 37% above. Your effective federal rate will be well below the marginal rate at most income levels.

Federal vs Iowa Tax Burden

For a Iowa single filer earning $60,000 annually, estimated federal income tax is roughly $6,748 (11.2% effective), plus Iowa state tax of $1,600 (flat 3.8%), Social Security $3,720, and Medicare $870. Estimated annual take-home: approximately $47,100.

The flat tax structure means Iowa does not penalize additional income with a higher marginal state rate — every extra dollar earned is taxed at exactly 3.8% for state purposes. This can make Iowa attractive for higher earners who benefit from the predictability of a flat system.

Pre-tax 401(k) contributions, HSA contributions, and health insurance premiums reduce both federal and Iowa taxable income before tax is applied. Maximizing pre-tax deductions is one of the most effective ways to reduce your Iowa paycheck tax burden.

Paycheck Calculator Iowa: 2026 Withholding Quick Guide

For a paycheck calculator for Iowa in 2026, three numbers anchor the math: the IRS standard deduction ($15,000 single, $30,000 MFJ), the $176,100 Social Security wage base, and Iowa's flat 3.8% state rate (the legislature collapsed Iowa to a single bracket as of 2025). Iowa has no SDI tax. Federal figures come from the IRS 2025 inflation adjustments (Rev. Proc. 2024-40) and the SSA contribution and benefit base. Updated 2026-06-11.

Iowa Paycheck Calculator: School District Surtax & Retirement Exemptions

Iowa's headline 3.8% flat rate hides two important paycheck adjustments. First, most Iowa school districts levy a school district income surtax (commonly 1%–18% OF your state income tax owed, not 1%–18% of income) — Des Moines is 0%, Dubuque is ~4%, Davenport is ~7%, Cedar Rapids is ~3%. Per the Iowa Department of Revenue withholding tax page, employers withhold the surtax automatically based on the employee's home school district. Second, Iowa now fully exempts retirement income (pensions, IRA distributions, 401(k) withdrawals) for filers age 55+, a major change from the pre-2023 partial exemption — verify with your HR if you are nearing 55 to update your W-4. This calculator's state tax line shows only the 3.8% base; add the school surtax separately if your district levies one. Updated 2026-06-19.

How to Use This Iowa Paycheck Calculator

Enter your pay period (weekly, biweekly, semimonthly, monthly, or annual), then input either your annual gross salary or your hourly rate and average hours per week. Select your federal filing status — single, married filing jointly, married filing separately, or head of household — as this determines your federal tax brackets and standard deduction.

If you have pre-tax deductions such as a 401(k) contribution, health insurance premium, or HSA contribution, enter the total per-period dollar amount. These reduce your taxable income before federal and state taxes are calculated. The calculator will show federal income tax, Social Security (6.2%), Medicare (1.45%), Iowa state income tax (3.8%), your total deductions, and your net take-home pay — both per period and annualized.

Results are estimates based on standard assumptions and 2026 tax rates. Actual withholding may differ based on your W-4 elections, additional withholding, local taxes (in some cities), or retirement plan contribution limits. For precise payroll calculations, consult your payroll provider or a tax professional.