Iowa Salary & Tax Calculator
See exactly how much you're taking home in Iowa. This calculator is pre-filled with the state's 3.8% flat income tax rate so you can get a realistic estimate fast.
Iowa recently finished phasing out its old nine-bracket progressive tax system, which once topped out near 8.98% for high earners, in favor of a single flat rate of 3.8%. It's one of the more dramatic tax simplifications among Midwestern states in recent years, and it puts Iowa in a genuinely competitive position: below Illinois's 4.95% flat rate, above Indiana's 3.05%, and well under Minnesota's graduated top brackets that can climb past 9%. One quirk unique to Iowa is that a straightforward "local income tax" doesn't quite exist the way it does in Indiana — instead, many Iowa school districts levy a School District Surtax, which is calculated as a percentage of your state tax liability rather than a direct add-on percentage of your salary. Depending on your district, that can nudge your effective combined rate up modestly. For most residents, the flat 3.8% state rate is the dominant number to plan around. Use the calculator below with the 3.8% figure pre-loaded, and adjust slightly upward if your school district applies a surtax.
*Estimates only. Not tax, financial, or legal advice. Consult a tax professional for precise figures.
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How it Works
Strips away estimated income taxes and common deductions from your gross Iowa salary to reveal your actual take-home (net) pay.
The Formula
Net Pay = Gross Pay - (Federal Tax + Iowa Flat Tax of 3.8% + Optional School District Surtax + FICA + Pre-tax Deductions).
Pro Tip
Check your specific school district's surtax percentage on the Iowa Department of Revenue site — it's applied to your tax liability, not your salary directly, so its effect on take-home pay is usually small.
Frequently Asked Questions
Does Iowa have a state income tax? +
Yes. Iowa recently completed a multi-year transition from a progressive bracket system to a single flat income tax rate of 3.8%, one of the more significant state tax overhauls in the Midwest.
How does Iowa's income tax compare to its neighbors? +
Iowa's 3.8% flat rate sits below Illinois's 4.95% flat rate but above Indiana's 3.05%. It's also lower than Minnesota's graduated top brackets, which can exceed 9%, making Iowa relatively competitive within the region.
Do Iowa cities or counties add a local income tax? +
Not quite a traditional local income tax, but many Iowa school districts levy a School District Surtax, calculated as a percentage of your state income tax liability rather than your income directly. Rates vary by district, typically in the low single digits.
Why did Iowa switch to a flat tax? +
Iowa lawmakers phased out the old nine-bracket system (which topped out near 8.98%) in favor of a single 3.8% rate to simplify filing and make the state more competitive for attracting residents and businesses from neighboring states.
What tax rate should I use for this calculator? +
The field is pre-filled with 3.8%, Iowa's flat state income tax rate. If your school district levies a surtax, nudge the percentage up slightly, then add your federal effective rate for a fuller combined estimate.