Iowa has a flat state income tax rate of 3.8% on all taxable income. Iowa recently transitioned from a progressive tax system to a flat tax, dramatically simplifying the state's tax structure and reducing the overall tax burden.
Iowa Flat Tax Rate
| Taxable Income | Tax Rate |
|---|---|
| All income | 3.8% |
Iowa transitioned to a flat tax in 2023, reducing from a top rate of 8.53% to just 3.8%. This represents one of the largest tax cuts in state history. These figures are based on Iowa Department of Revenue guidelines.
What You'll See on Your Paystub
An Iowa worker's paystub includes both federal income tax withholding and state deductions:
| Deduction | Rate | Notes |
|---|---|---|
| Federal Income Tax | Varies | Based on W-4 and income |
| Social Security | 6.2% | Up to $181,200 wage base |
| Medicare | 1.45% | No wage limit |
| Iowa State Income Tax | 3.8% | Flat rate on all taxable income |
Iowa Standard Deduction
Iowa's standard deduction is tied to federal amounts:
| Filing Status | Standard Deduction (2026) |
|---|---|
| Single | $15,420 |
| Married Filing Jointly | $30,840 |
| Head of Household | $23,130 |
No Local Income Taxes
Iowa does not allow cities or counties to impose local income taxes. Your state withholding covers all Iowa income tax obligations.
Reciprocity Agreement
Iowa has an income tax reciprocity agreement with Illinois:
- Illinois: Iowa residents working in Illinois pay only Iowa tax
If you live in Iowa and work in Illinois, file exemption Form 44-016 with your Illinois employer to have only Iowa taxes withheld.
Retirement Income
Iowa has become very retirement-friendly:
- Social Security benefits are fully exempt
- Pension income is fully exempt (as of 2023)
- 401(k) and IRA distributions are fully exempt
- Military retirement pay is fully exempt
Iowa eliminated all state taxes on retirement income starting in 2023, making it one of the most tax-friendly states for retirees.
Federal Tax Deduction Eliminated
Iowa previously allowed taxpayers to deduct federal taxes paid from their state taxable income. This unique deduction was eliminated as part of the flat tax transition.
Iowa vs. Neighboring States
| State | Tax Structure | Rate |
|---|---|---|
| Iowa | Flat | 3.8% |
| South Dakota | None | 0% |
| Nebraska | Progressive | 5.84% |
| Minnesota | Progressive | 9.85% |
| Wisconsin | Progressive | 7.65% |
| Illinois | Flat | 4.95% |
| Missouri | Progressive | 4.8% |
Comparing Take-Home Pay
Here's how a $75,000 annual salary in Iowa compares to other states:
| State | Effective Rate | Annual State Tax |
|---|---|---|
| Iowa | ~3.0% | ~$2,250 |
| Minnesota | ~5.5% | ~$3,600 |
| South Dakota | 0% | $0 |
Iowa's 3.8% flat tax is significantly lower than neighboring Minnesota's top rate of 9.85%, making it attractive for workers who live near the border.
Agriculture Industry
Iowa's agriculture sector has special considerations:
- Farm income is subject to state income tax
- Self-employed farmers file estimated quarterly taxes
- Cash rent and crop share arrangements have different tax treatments
- Farm employees follow standard withholding rules