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Self-Employment Tax Calculator 2025
Last verified: May 2026 · IRS Schedule SE
Calculate your full 15.3% SE tax plus federal income tax as a 1099 contractor, freelancer, or sole proprietor. Includes QBI deduction and quarterly payment estimate.
Revenue minus business expenses
SEP-IRA, Solo 401k, etc.
Total Annual Tax Bill
$15,667
SE Tax (15.3%)
$11,304
Federal Income Tax
$4,363
Effective Tax Rate
19.6%
Quarterly Payment
$3,917
Take-Home Pay: $64,333
QBI Deduction: $16,000 · SE Deduction: $5,652
Where Your Money Goes
$64,333
80.4%
$11,304
14.1%
$4,363
5.5%
2025 Quarterly Payment Due Dates
Q1 (Jan–Mar)
April 15, 2025
$3,917
Q2 (Apr–May)
June 16, 2025
$3,917
Q3 (Jun–Aug)
Sept 15, 2025
$3,917
Q4 (Sep–Dec)
Jan 15, 2026
$3,917
Tax-Saving Tips
- ✓Maximize SEP-IRA contributions (up to 25% of net income, max $69,000 in 2025)
- ✓Deduct 50% of SE tax from gross income automatically
- ✓Claim the 20% QBI deduction if eligible (phase-outs apply)
- ✓Track all business expenses — each $1 of deduction saves ~37¢ in tax
- ✓Consider S-Corp election if earning over ~$40,000 net profit
Legal Resources
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What is Self-Employment Tax?
Self-employment tax is a 15.3% tax on net self-employment income. It covers Social Security (12.4%) and Medicare (2.9%). Unlike employees who split these costs with employers, self-employed individuals pay the full amount.
However, the IRS allows you to deduct half your SE tax as an above-the-line deduction, and you may also qualify for the 20% Qualified Business Income (QBI) deduction under Section 199A.
For 2025, the Social Security wage base is $176,100 — income above this is subject only to the 2.9% Medicare tax (plus 0.9% Additional Medicare Tax if over $200K single/$250K married).
The Formula — How to Calculate Self-Employment Tax
Net Income = Revenue minus allowable business expenses
0.9235 = 92.35% — IRS multiplier (100% minus half of 15.3%)
15.3% = 12.4% Social Security + 2.9% Medicare
Step-by-Step Example
Frequently Asked Questions
Sources & References
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This tool is for educational purposes only and does not constitute financial, tax, or investment advice. Consult a qualified financial professional for advice specific to your situation.
Analysis & insights
Your se tax is $11,304, based on the inputs above. Loan and credit decisions compound over years. Small rate or term changes have outsized lifetime impact.
Calculation summary
Result derived from 4 inputs. Adjust any one to test sensitivity.
Risk & benchmark gauge
Current band
Low
Se Tax: $11,304
Industry benchmarks
- Se Tax$11,304
- Federal Tax$4,363
- Total Tax$15,667
- Effective Rate19.6%
- Take Home$64,333
- Quarterly Payment$3,917
Key insights
Time + rate compound
In long-horizon money math, small changes in rate or time produce outsized changes in the final number. Try ±1% on the rate to see sensitivity.
Sensitivity testing
Adjust each input by ±10% to find the most impactful variable — that's the one to focus your real-world decisions on.
Recommended actions(4)
Test the realistic range of each input
High priorityTry the lowest and highest realistic value for each input. The spread of results is the range you should actually plan for — point estimates lie.
Impact: Reveals which inputs matter most and where uncertainty hides.
Compare against published benchmarks
Medium priorityWhatever you're calculating, there's likely an industry benchmark for it. Google "[topic] average" or "[topic] median" to sanity-check the result.
Save or download a copy
Medium priorityFor calculators that offer it, use "Download report (PDF)" to keep a snapshot. Otherwise screenshot the inputs + result before navigating away.
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