Iowa Self-Employment Tax Calculator 2026
Iowa has a flat income tax rate of 3.8%. Use this calculator to estimate your total tax liability including federal self-employment tax, federal income tax, and Iowa state income tax.
Your 2026 Tax Estimate — Iowa
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Quarterly Estimated Tax Schedule
Self-Employment Tax in Iowa (IA)
If you're self-employed in Iowa, you'll pay three types of tax on your 1099 income: federal self-employment tax (15.3%), federal income tax (10-37% depending on your bracket), and Iowa state income tax. Iowa has a flat income tax rate of 3.8%.
Important note: Iowa transitioned to a flat income tax rate.
How Self-Employment Tax Works
The federal self-employment tax rate is 15.3% — covering both Social Security (12.4%) and Medicare (2.9%). This is calculated on 92.35% of your net self-employment earnings. For 2026, Social Security tax applies to earnings up to $176,100. You can deduct half of your SE tax when calculating your federal income tax, which reduces your overall tax burden.
Other States
No Income Tax States
Iowa Tax Quick Facts
- Income Tax
- Yes
- Tax Type
- flat
- Rate
- 3.80%
- Federal SE Tax
- 15.3%