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Iowa Income Tax Calculator 2026 — Flat 3.8% Rate
Estimated Iowa state income tax at common income levels, combined federal + state burden, and the full Iowa tax bracket table — 2025 rates.
Reviewed for accuracy June 2026 by Gary Sing
State tax type
Flat 3.8%
State tax at $75k
$2,850
Federal tax at $75k
$8,114
Combined eff. rate $75k
14.6%
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Iowa income tax at common income levels — 2025
Single filer, 2025 federal standard deduction ($15,000). Federal tax uses 2025 IRS brackets.
| Income | Iowa state tax | State eff. rate | Federal tax | Total tax | Total eff. rate |
|---|---|---|---|---|---|
| $50,000 | $1,900 | 3.8% | $3,962 | $5,862 | 11.7% |
| $75,000 | $2,850 | 3.8% | $8,114 | $10,964 | 14.6% |
| $100,000 | $3,800 | 3.8% | $13,614 | $17,414 | 17.4% |
Single filer. Federal tax computed on gross income minus $15,000 standard deduction using 2025 IRS brackets. State tax estimates are approximate — consult a tax professional for exact liability. Does not include FICA (Social Security + Medicare), local taxes, or deductions beyond the standard deduction.
Iowa state income tax rate 2025
Flat rate: 3.8% on all taxable income
Iowa transitioned to a flat 3.8% income tax rate in 2025, down from a higher multi-bracket system. Iowa is continuing to reduce its income tax rate in subsequent years under current legislation.
| Income | State tax rate | Note |
|---|---|---|
| All taxable income | 3.8% | Applied to federal AGI |
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Iowa income tax — frequently asked questions
Does Iowa have a state income tax?
Yes. Iowa has a flat 3.8% income tax rate that applies to all taxable income.
What is the Iowa state income tax rate for 2025?
Iowa has a flat 3.8% state income tax rate for 2025. This rate applies to all taxable income.
How much Iowa state income tax do I owe on $75,000?
On a $75,000 gross income (single filer, 2025), estimated Iowa state income tax is approximately $2,850 (effective rate: 3.8%). Combined with federal income tax of approximately $8,114, total tax is about $10,964 — an overall effective rate of 14.6%.
What is the combined federal and Iowa state income tax at $100,000?
At $100,000 gross income (single filer, 2025 standard deductions): federal income tax is approximately $13,614, Iowa state income tax is $3,800, for a combined total of approximately $17,414 — an overall effective rate of 17.4%.
How does Iowa's income tax compare to other states?
Iowa's top rate of 3.8% places it among the lower-tax states nationally. The nine states with no income tax pay $0 in state income tax; the highest-tax states (California at 13.3%, Hawaii at 11%) have the largest state income tax burdens.