Estimate your Iowa state income tax plus combined federal and IA state tax for 2026. 3.8% top rate.
Iowa has been aggressively cutting income taxes with a flat 3.8% rate for 2026, with further reductions planned. Iowa does not tax Social Security benefits and offers retirement income exclusions for residents over 55. Use the calculator above to estimate your combined federal and Iowa state income tax for 2026. State tax figures use a simplified rate — for precise Iowa state tax calculations, consult the Iowa Department of Revenue or a licensed tax professional.
Iowa uses a 3.8% top rate state income tax structure. Like most states, Iowa starts its calculation from your federal Adjusted Gross Income (AGI), then applies state-specific adjustments — subtracting income Iowa excludes from taxation (such as certain pension or Social Security income) and adding back any income Iowa taxes that the federal government does not. After adjustments, the Iowa standard deduction is applied, then the 3.8% top rate is applied to arrive at state taxable income.
Iowa income tax is collected through employer paycheck withholding for W-2 employees and through quarterly estimated payments for self-employed residents and those with significant non-wage income. The Iowa state return is generally due April 15, aligned with federal returns. Part-year residents and nonresidents who earn income sourced in Iowa must also file a Iowa return for that income portion.
Your Iowa state income taxes are deductible on your federal Schedule A as part of the SALT (State and Local Tax) deduction, capped at $40,400 in 2026 under OBBBA. At the 22% federal bracket, paying $1,244 in Iowa state income tax generates approximately $273 in federal tax savings, reducing the true net cost of your Iowa taxes to about $971 for itemizing taxpayers.
Jordan is a single filer earning $75,000 in Iowa. This shows how federal and Iowa state income tax are calculated together.
Moving to a no-income-tax state (Texas, Florida, Nevada, or Wyoming) would save Jordan approximately $1,244/year ($103/month) in state income taxes. However, no-income-tax states often fund services through higher property taxes, sales taxes, or other fees, so a complete comparison requires evaluating all taxes together, not just income tax.
Iowa Tax Rate and Annual Filing
Iowa residents earning above the state filing threshold must file a Iowa income tax return annually, typically due April 15. The 3.8% top rate applies after Iowa-specific deductions and any state tax credits. Employers withhold Iowa state income tax from employee paychecks throughout the year using Iowa withholding tables, and any balance owed or refund due is settled when the annual state return is filed. Self-employed Iowa residents make quarterly estimated payments to the state in addition to their federal quarterly estimated tax payments.
Federal SALT Deduction Reduces Net State Tax Cost
State income taxes paid in Iowa reduce your federal taxable income through the SALT deduction (capped at $40,400 in 2026 under OBBBA). For a Iowa resident in the 22% federal bracket paying $1,244 in state income tax, the SALT deduction recovers approximately $273 in federal taxes, so the true after-federal-benefit cost of Iowa state income tax is about $971. This offset only benefits taxpayers who itemize deductions on federal Schedule A rather than taking the standard deduction.
Total Tax Burden: State Income Tax Is One Piece
State income tax is one component of your total tax burden in Iowa. Property taxes, local income taxes (in some Iowa cities and counties), and state and local sales taxes also contribute to your overall cost of living. When comparing Iowa to other states, evaluate all tax types together rather than income tax in isolation. Use the calculator above to see your combined federal and Iowa state effective rate at your specific income level.
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Iowa has a 3.8% top rate state income tax for 2026. Iowa has been aggressively cutting income taxes with a flat 3.8% rate for 2026, with further reductions planned. Iowa does not tax Social Security benefits and offers retirement income exclusions for residents over 55. The state income tax is calculated separately from federal income tax and is paid through payroll withholding or quarterly estimated payments.
Iowa has its own state standard deduction separate from the federal standard deduction ($15,750 single, $31,500 MFJ in 2026). For precise Iowa state deduction amounts, consult the Iowa Department of Revenue or a state tax professional.
Iowa's 3.8% top rate state income tax can be compared to other states using our state tax calculator above. The U.S. average top marginal state income tax rate is approximately 5-6%. Nine states have no income tax at all (Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, Wyoming), while California has the highest at 13.3%.
Iowa offers state tax credits and deductions that may reduce your state tax liability. Common state credits include earned income credits, child tax credits, and credits for the elderly. Consult the Iowa Department of Revenue website or a licensed tax professional for credits specific to your situation and income level.
Use the calculator above. Enter your income and IA is pre-selected as your state. The calculator computes your 2026 federal income tax using the One Big Beautiful Bill Act brackets (10%-37%), adds your estimated Iowa state income tax (3.8% top rate simplified), and displays your total tax burden, combined effective rate, and annual take-home pay. All calculations happen instantly in your browser.