United States · Tax
Self-Employment Tax Calculator
Estimate US self-employment tax for tax year 2025 from net earnings, existing wage-base usage, and filing status.
Interactive calculator
Estimate self-employment tax
Use net self-employment income, filing status, and any wages already subject to Social Security tax to estimate the Schedule SE tax components.
Results
Total SE tax
$16,955
Social Security part
$13,742
Medicare part
$3,214
Above-the-line deduction
$8,478
How to use it
- 01Enter net self-employment income, any wages already subject to Social Security tax, filing status, and the Social Security wage base being modeled.
- 02Review the Social Security portion, Medicare portion, additional Medicare amount, total SE tax, and deductible half.
- 03Use the page as a planning estimate before quarterly payments or year-end tax prep.
Result guide
- The calculator focuses on the core federal self-employment-tax mechanics and does not replace complete return preparation.
- Existing W-2 wages can reduce the remaining Social Security wage-base room available to self-employment income.
- The deductible half shown here is a common planning input for broader income-tax work.
About this calculator
Self-employment tax is a common pain point because freelancers and owners usually know ordinary income tax is not the whole story. A useful page should separate Social Security tax, Medicare tax, and the deductible half.
This version is scoped to tax year 2025 and lets the user account for wages already subject to Social Security tax, which can materially change the result.
Frequently asked questions
Why does the page ask about wages already subject to Social Security tax?
Because Social Security tax is limited by a wage base, and prior wages can use part or all of that cap before self-employment income is considered.
Is this the same as ordinary federal income tax?
No. Self-employment tax is a separate payroll-style tax calculation on business earnings and sits alongside ordinary income tax.
What is the US self-employment tax rate for 2025?
The federal self-employment tax rate is 15.3%, consisting of 12.4% for Social Security (applied up to the wage-base limit of $176,100 for 2025) and 2.9% for Medicare (uncapped). Additionally, high earners above $200,000 ($250,000 if married filing jointly) are subject to an extra 0.9% Medicare surtax.
Method and limitations
This calculator uses the formula and assumptions described on this page. We do not claim independent professional review. Direct references will be listed here when they support a specific rule or data source used by this calculator.
Results are estimates for general information. Verify current rules and assumptions before making financial, tax, or health decisions.
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