How much Iowa tax should be withheld from each paycheck?
Iowa uses 3.8% flat income tax rate in the current TaxGuide Pro calculator data. Estimate Iowa state withholding per paycheck for 2025, 2026, or 2027 planning by entering wages, pay frequency, and filing status. The calculator annualizes income, applies Iowa withholding rules, and returns an estimated per-paycheck withholding amount.
Estimates use Iowa’s flat tax rate and may differ from payroll withholding formulas.