U.S. Self-Employment Tax Calculator (Schedule C & SE)
Estimate U.S. self-employment tax (Social Security and Medicare) and the deductible portion for Schedule SE. Includes references to relevant IRS guidance and assumptions used.
- Page updated:
- Jan 3, 2026
- Tool version:
- v1.1.0
Overview
Quickly estimate U.S. self-employment tax (combined Social Security and Medicare) and the deductible portion reported on Schedule SE.
This tool is intended to provide a clear, rule-based estimate using standard Schedule C/SE assumptions so you can model tax impact of self-employment income.
Results
Self-Employment Taxable Amount
$923.50
Estimated Self-Employment Tax
$141.30
Deductible Half of SE Tax
$70.65
How to read the result
- What it means
- The displayed value is an estimate based on your inputs. It represents the calculated scenario under current assumptions, not a guaranteed amount.
- Next step
- Use the result as a starting point. Adjust parameters to compare scenarios and validate with a professional when needed.
- Calculation limits
- The model uses simplified formulas and cannot account for all variables in your specific case (local regulations, personal conditions, temporal changes).
Methodology
Calculations use the Schedule SE convention: multiply net self-employment income by 92.35% to determine the portion subject to self-employment tax, then apply the combined self-employment tax rate of 15.3% (12.4% Social Security + 2.9% Medicare).
The result includes an estimate of the deductible half of self-employment tax (reported as an adjustment to income). This calculator does not apply Social Security wage base limits, additional Medicare surtax thresholds, or individual tax credits — see citations for authoritative rules and limits as of the dates listed.
Data snapshot and assumptions: Social Security and Medicare rates used are the standard combined rate of 15.3% and the 92.35% net calculation (both commonly used for Schedule SE through tax year 2025). Adjustments for wage base caps and recent law changes are not applied automatically; consult the IRS guidance linked below for year-specific limits.
Glossary+−
- Net Self-Employment Income
Net profit from self-employment after business expenses, usually the Schedule C 'net profit' amount. This is the input used to calculate self-employment tax.
- Self-Employment Taxable Amount
The portion of net self-employment income subject to SE tax, commonly calculated as 92.35% of net self-employment income for Schedule SE purposes.
- Deductible Half of SE Tax
One-half of the self-employment tax is an adjustment to income on Form 1040 and reduces adjusted gross income for income tax purposes.
Key takeaways
Use this calculator to estimate Schedule SE figures: the amount subject to SE tax, the SE tax liability, and the deductible half.
For filing or planning, verify year-specific limits and additional rules with the IRS or a qualified tax professional.
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Tax & Freelance (UK/US/CA)Worked examples
Example: $50,000 Net Self-Employment Income
Estimate self-employment tax and deductible half for a Schedule C filer with $50,000 net income.
Interpretation
Taxable amount = $50,000 × 92.35% = $46,175. Estimated SE tax = $46,175 × 15.3% ≈ $7,068. Deductible portion = 50% of SE tax ≈ $3,534. Use these figures when preparing Schedule SE and the adjustment to income on Form 1040.
Frequently asked questions
What does the calculator include?
It estimates the portion of net self-employment income subject to self-employment tax, the total self-employment tax (Social Security + Medicare), and the deductible half. It does not compute income tax, credits, or apply Social Security wage base caps.
Why multiply by 92.35%?
The 92.35% factor is the standard adjustment used to approximate the net earnings from self-employment after the deductible part of self-employment tax is considered, per Schedule SE conventions.
Are these rates current?
This calculator uses common Schedule SE conventions through the latest review date shown above. For year-specific wage caps or surtax thresholds, consult the IRS links in citations.
Sources & references
- IRS - Self-Employment Tax (Schedule SE): https://www.irs.gov/businesses/small-businesses-self-employed/self-employment-tax-schedule-se
- IRS - Topic No. 554 Self-Employment Tax: https://www.irs.gov/taxtopics/tc554
Quality & oversight
- Author
- Ugo Candido, MBA
- Maintained by
- Ugo Candido, MBA
- Page updated
- Jan 3, 2026
- Tool version
- v1.1.0