Tax Bracket Calculator for Iowa (IA) — Free Calculator

Iowa Tax Brackets (2026)

Iowa uses a graduated income tax system with a top marginal rate of 6.0%.

Iowa Bracket Structure

4.4% on income up to $6,210; 4.82% on $6,211–$31,050; 5.7% on $31,051–$62,100; 6.0% above $62,100 (2024 rates; Iowa is transitioning to a flat 3.9% by 2026)

Iowa is in a multi-year income tax reduction. Rates dropped significantly in 2023 and 2024, with a flat 3.9% rate scheduled for 2026. Iowa also eliminated the deductibility of federal income taxes, which previously made its effective rate higher than the nominal rate.

Federal Tax Brackets Still Apply to Iowa Residents

Regardless of Iowa's state tax rules, all residents pay federal income tax. Federal brackets for 2024 range from 10% (on income up to $11,600 for single filers) to 37% (on income over $609,350). Your effective federal rate is typically well below the top marginal rate due to the graduated bracket structure.

Effective vs. Marginal Rate in Iowa

Your marginal rate is the rate on your last dollar of income. Your effective rate is your total tax divided by total income. For Iowa residents the marginal rate can reach 6.0% but most filers pay a lower effective rate. The median household income in Iowa is $65,689.

Data: Tax Foundation (2024), IRS Statistics of Income, US Census Bureau ACS 2023. Updated 2024–2025. Figures reflect state averages — consult a licensed CPA for personalized tax advice.

Tax Bracket Calculator for Other States

Frequently Asked Questions

What tax brackets apply to Iowa residents?

Iowa has a graduated income tax system. 4.4% on income up to $6,210; 4.82% on $6,211–$31,050; 5.7% on $31,051–$62,100; 6.0% above $62,100 (2024 rates; Iowa is transitioning to a flat 3.9% by 2026). Federal brackets also apply on top of the state tax.

What is the difference between marginal and effective tax rate in Iowa?

Your marginal rate is the rate on your highest dollar of income. Your effective rate is your total tax burden divided by total income. In Iowa, even if the top marginal rate is 6.0%, most residents pay a lower effective rate because lower income portions are taxed at lower brackets.

Does Iowa have different tax brackets for married filers?

Yes, Iowa typically has different bracket thresholds for single vs. married filing jointly filers. Married joint filers often have brackets approximately twice as wide, reducing the marriage penalty. Check the Iowa Department of Revenue for current bracket tables.

How does this tax bracket calculator work for Iowa?

Enter your income and filing status. The calculator applies both federal and Iowa state tax brackets to show your marginal rate, effective rate, and total estimated tax. Iowa's graduated rate of up to 6.0% is applied to your state taxable income.