Iowa Income Tax Calculator

How to Use This Iowa Income Tax Calculator

This Iowa income tax calculator estimates your annual state and federal tax liability for 2026. Enter your gross wages, filing status, and any pre-tax deductions. Iowa applies a flat 3.8% rate to taxable income after subtracting the Iowa standard deduction — no brackets, no phase-outs.

This tool focuses on your annual tax picture — useful for tax planning, comparing job offers in different states, or estimating what you owe at filing time. For a per-paycheck breakdown, use the Iowa paycheck calculator; to compare Iowa with other states, use the general income tax calculator.

How Iowa's Flat 3.8% Tax Rate Works

Iowa is one of a growing group of states using a flat income tax — a single rate applied to all taxable income. Iowa moved to a flat rate structure in 2025 (3.9%) and reduced it further to 3.8% in 2026. The legislature has committed to further reductions, making Iowa one of the fastest-moving states in terms of income tax reduction.

Iowa state income tax applies to:

• W-2 wages and salaries — including bonuses and overtime.
• Self-employment income — net earnings after deductible business expenses.
• Capital gains — taxed as ordinary income at the flat 3.8% rate. Iowa eliminated its separate capital gains exclusion in the 2022 reform.
• Retirement income (partial) — Iowa exempts Social Security benefits and provides an exclusion of up to $6,000 for taxpayers 55 or older on pension/IRA income.

Iowa Standard Deduction and Retirement Exemptions

Iowa provides a standard deduction of $2,210 (single) / $5,450 (MFJ) in 2026. Unlike many states, Iowa does not offer a personal exemption in addition to the standard deduction — the standard deduction is the primary reduction before applying the 3.8% rate.

For a single filer with $75,000 in gross income in 2026, the Iowa calculation is:

1. Gross income: $75,000
2. Subtract Iowa standard deduction: $75,000 − $2,210 = $72,790 (Iowa taxable income)
3. Apply flat rate: $72,790 × 3.8% = $2,766 in Iowa state income tax

Iowa's retirement income rules are notably favorable: Social Security is fully exempt, and taxpayers age 55+ can exclude up to $6,000 (single) or $12,000 (MFJ) in pension, IRA, and 401(k) distributions.

FICA Taxes — Social Security and Medicare

FICA taxes are federal and apply to every Iowa worker's income:

• Social Security: 6.2% on wages up to $176,100 (2025) or $184,500 (2026). No further withholding once you hit the wage base.
• Medicare: 1.45% on all wages with no cap.
• Additional Medicare: 0.9% on wages above $200,000 (single) or $250,000 (married jointly) — employee only, no employer match.

Step-by-Step Example — $80,000 Iowa Single Filer (2026)

1. Gross wages: $80,000
2. Federal standard deduction: −$16,100 → federal taxable income: $63,900
3. Federal income tax (10% + 12% + 22% brackets): ≈ $8,522
4. FICA: $80,000 × 7.65% = $6,120
5. Iowa standard deduction: −$2,210 → Iowa taxable income: $77,790
6. Iowa income tax: $77,790 × 3.8% = $2,956
7. Total taxes: $8,522 + $6,120 + $2,956 = $17,598
8. Annual net income: $80,000 − $17,598 = $62,402

How to Reduce Your Iowa Annual Tax Liability

• Maximize traditional 401(k) contributions — the 2026 limit is $23,500 ($31,000 if 50+). At a combined 3.8% Iowa + 22% federal = 25.8% marginal rate, every $1,000 contributed saves $258 in taxes.
• Contribute to an HSA — $4,300 (self-only) or $8,550 (family) in 2026. Reduces both federal and Iowa taxable income.
• Iowa 529 College Savings deduction — Iowa taxpayers can deduct up to $5,500 per beneficiary (single) or $11,000 per beneficiary (MFJ) in Iowa College Savings Iowa 529 contributions from Iowa taxable income each year.
• Dependent Care FSA — up to $5,000 of childcare expenses paid with pre-tax dollars, reducing both federal and Iowa taxable income.
• Take advantage of the retirement income exclusion — if you are 55 or older, up to $6,000 of pension/IRA distributions can be excluded from Iowa taxable income ($12,000 MFJ), and Social Security is always exempt.

Tax Disclaimer

This calculator provides estimates for informational purposes only. It is not tax advice. Iowa's income tax rates are changing annually under the 2022 reform act. Federal brackets, FICA wage bases, and standard deduction amounts also change annually. Consult a qualified Iowa-licensed CPA or tax professional for guidance on your specific situation.