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 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.