For more on how deductions change taxable wages, see our
pre-tax vs. post-tax deductions guide.
Iowa Paycheck Tax Calculator: How Iowa Withholding Works
An Iowa paycheck calculator has one state tax to
get right, and since Iowa went to a flat rate it takes one
deduction, one percentage and one credit. On your pay stub it
usually appears as
SIT or IA state withholding;
our pay stub abbreviations list
explains the other codes.
Federal Withholding for Iowa Paychecks
Federal withholding uses your Form W-4 and the 2026 IRS Publication
15-T tables. The calculator supports filing status, Step 2(c), Step 3
credits and Step 4(a), 4(b) and 4(c). If you claim the new overtime
or tips deductions, our
W-4 Step 4(b) worksheet guide
shows how to enter them, and our
2026 federal tax withholding guide
covers the rest.
Working Across State Lines
Iowa's only wage reciprocity agreement is with
Illinois.
Commuters from
Nebraska,
Minnesota,
Missouri,
Wisconsin and
South Dakota
pay Iowa tax on Iowa wages. Iowa residents who work in another
state owe Iowa tax on all their income and take a credit for tax
paid to the other state; South Dakota has no income tax to credit.
No City Income Tax
No Iowa city or county withholds income tax from wages. Des Moines,
Cedar Rapids, Davenport and every other city add nothing to
paycheck deductions. The school district and EMS surtaxes come
later, on your state return.
Bonuses
Bonuses are subject to Iowa withholding at 3.8%, plus federal
withholding (usually a flat 22% on separately paid bonuses) and
FICA. See why bonuses are taxed so high.
Employer Payroll Costs in Iowa
Employers pay state unemployment tax
on the first $20,400 of each employee's wages in 2026, down from
$39,500 under Senate File 607. Rates run from 0% to 5.4%; new
non-construction employers pay 1% and new construction employers
5.4%. Employers also pay their share of Social Security and
Medicare and federal unemployment tax. None of it comes out of
your pay. At year-end, our
W-2 form generator
can use the same wage and withholding totals.
Why Your Actual Iowa Paycheck May Differ
This calculator is a close estimate, not your employer's payroll
run. Your IA W-4 on file (old or 2026 version), benefit elections,
year-to-date wages and a 27th biweekly payday in some years can all
move the result a little.
Three-paycheck months
change monthly cash flow but not the tax on each check. For a full
checklist, see why your paycheck is lower than expected.
Official 2026 Iowa Payroll Sources
Payroll facts on this page are checked against the
2026 Iowa withholding formula,
the 2026 IA W-4,
the Department of Revenue withholding guidance,
Iowa Workforce Development,
the Iowa minimum wage notice
and IRS Publication 15-T for 2026.
Reviewed September 24, 2026.