Iowa paycheck withholding calculator
Estimate how your paycheck withholding compares with a simplified annual Iowa income tax estimate. Enter your yearly wages and the state tax amounts from your paystub. Review the assumptions before changing payroll settings.
Iowa tax snapshot: Iowa taxes wages at a flat 3.9% rate. The Iowa standard deduction in this estimate is $2,550 for single filers — confirm the current-year figure in state instructions. The personal exemption is $4,000. To change Iowa withholding, file Iowa Form IA W-4 with your employer.
Check your Iowa paycheck withholding
Enter your yearly wages and the state tax amounts from your paystub. This is a planning estimate, not your final state tax bill.
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Iowa income tax brackets (2026)
Iowa uses a flat 3.9% rate on taxable wages. The standard deduction is $2,550 for single filers. The personal exemption is $4,000.
Flat-rate states still require attention: local taxes, credits, and employer payroll rules can change your withholding. This estimate is simplified.
How to adjust Iowa withholding
File Iowa Form IA W-4 with your employer to change Iowa paycheck withholding. Confirm you have the current-year version, enter only the lines your situation requires, and check your next paystub's state-tax line to verify the change took effect within one or two pay periods.
What is the Iowa state income tax rate?
Iowa taxes wage income at a flat 3.9% rate. This is a planning estimate — check current state instructions for your filing status and year.
What form changes Iowa withholding?
Iowa Form IA W-4. Ask HR for the current-year version; payroll generally applies the change within one or two pay periods.