Your Iowa Tax Estimate
Pre-set for Iowa residents
📍 Iowa charges a 3.8% state income tax on self-employment income. This is applied on top of your federal self-employment tax and federal income tax.
$
$
Additional Deductions
Self-employed health insurance
Deduct 100% of premiums paid
$
SEP-IRA contribution
Up to 25% of net SE income (max $69,000)
$
QBI deduction (20%)
Most self-employed workers qualify
Your Iowa Tax Breakdown
Federal + SE + Iowa State Tax
Total Estimated Tax (Federal + SE + Iowa State)
—
Effective rate: —
Quarterly Payment
—
Pay 4× per year
Monthly Set-Aside
—
Recommended savings
Effective Total Tax Rate0%
0%Low 10–18%Avg 25–35%High 40%+
Tax Breakdown
Gross Income
—
Business Expenses
—
Net SE Income
—
Self-Employment Tax
15.3% on 92.35% of net
—
SE Tax Deduction (½)
—
Standard Deduction
—
Federal Taxable Income
—
Federal Income Tax
Marginal bracket: —
—
Iowa State Tax
3.8%
—
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2026 Quarterly Payment Schedule
| Quarter | Period | Due Date | Amount |
|---|---|---|---|
| Q1 2026 | Jan–Mar | Passed | — |
| Q2 2026 | Apr–May | Jun 16 | — |
| Q3 2026 | Jun–Aug | Sep 15 | — |
| Q4 2026 | Sep–Dec | Jan 15, 2027 | — |
⚠️ Disclaimer: Estimates based on 2025 federal brackets and simplified state tax rates. Not tax advice. Consult a CPA for personalized guidance.
Self-employment taxes in Iowa
Iowa State Tax Rate
Iowa charges a 3.8% state income tax on self-employment income. This is applied on top of your federal self-employment tax and federal income tax. This applies on top of your federal self-employment tax (15.3%) and federal income tax.
Quarterly Due Dates
All self-employed workers, regardless of state, must pay estimated federal taxes quarterly: April 15, June 16, September 15, and January 15, 2027. Missing a payment triggers an IRS underpayment penalty.
Key Deductions for Iowa Residents
Self-employed workers in Iowa can deduct business expenses, health insurance premiums, SEP-IRA contributions, and the QBI deduction — all of which reduce both federal and state taxable income.
Frequently asked questions — Iowa
How much self-employment tax do I owe in Iowa?
Self-employed workers in Iowa owe federal self-employment tax of 15.3% (applied to 92.35% of net income), federal income tax based on your bracket, plus Iowa state income tax at 3.8%. Use the calculator above for your exact estimate.
Does Iowa have a state income tax for self-employed workers?
Yes — Iowa charges 3.8% state income tax on self-employment income. This is in addition to your federal taxes.
How much should I set aside for taxes as a self-employed worker in Iowa?
A good rule of thumb for Iowa residents is 28–33% of gross income to cover self-employment tax (15.3%), federal income tax, and Iowa's 3.8% state income tax. Use the calculator above for your precise number.
When are quarterly estimated tax payments due in Iowa?
Federal estimated tax due dates are the same in every state: Q1 — April 15, 2026; Q2 — June 16, 2026; Q3 — September 15, 2026; Q4 — January 15, 2027. Iowa may also require separate state estimated tax payments on the same or similar schedule — check with the Iowa Department of Revenue for state-specific requirements.