Iowa charges 3.8% flat state income tax. Use the bonus tax calculator pre-loaded with Iowa rates.
Open Bonus Tax Calculator →When you receive a bonus in Iowa, your employer typically withholds at the federal supplemental rate of 22%, plus Iowa's flat 3.8%, and FICA at 7.65%. The combined withholding can make bonuses feel heavily taxed, though your actual liability may differ from withholding at year-end. This calculator shows both the withholding and the true tax on your bonus in Iowa.
Iowa levies a flat 3.8% state income tax on all taxable income regardless of how much you earn. This makes tax planning straightforward: for every additional dollar you earn, 3.8 cents goes to Iowa. Iowa does not impose local income taxes, so the 3.8% flat rate is the only state-level income tax you owe.
The table below shows what you actually keep at five salary levels in Iowa, accounting for federal tax, FICA, and Iowa's flat 3.8% state tax.
See how Iowa compares to other Midwest states. Each link takes you to the bonus tax calculator landing page for that state.
For a comprehensive breakdown of Iowa’s tax structure, salary comparisons, cost-of-living analysis, and more, visit the full Iowa take-home pay page.