Self-Employment Tax Rate
15.3% combined: 12.4% Social Security (capped at $184,500) plus 2.9% Medicare (uncapped). Half is deductible. Plus 0.9% extra Medicare over $200K/$250K.
2026 SE Tax Key Numbers
Combined Rate
15.3%
Social Security Half
12.4%
Medicare Half
2.9%
SS Wage Base
$184,500
12.4% Social Security stops at $184,500 of combined wages + SE earnings. 2.9% Medicare keeps applying on every dollar. Above $200K single / $250K MFJ, add 0.9% Additional Medicare. You can deduct half of regular 15.3% above-the-line on Schedule 1.
Source: IRS Self-Employment Tax · §1401-1403 of the Internal Revenue Code · Form Schedule SE.
What is the self-employment tax?
Self-employment tax is the equivalent for people without an employer to withhold their share. employees pay 7.65% through paycheck withholding (Social Security 6.2% + Medicare 1.45%); their employer pays another 7.65% separately. Self-employed people pay both halves themselves — 15.3% combined — directly on Schedule SE filed with their federal tax return.
The base SE tax has two components: 12.4% Social Security on net SE earnings up to the wage base ($184,500 for 2026, indexed annually) plus 2.9% Medicare with no upper limit. Above $200,000 (single) / $250,000 (), an additional 0.9% Medicare surtax kicks in (the same Additional Medicare Tax that hits high-earner wages).
To partially offset paying both halves, the IRS lets you deduct half of regular SE tax as an above-the-line adjustment on Schedule 1 — saving 10-37% of that amount in federal income tax depending on your bracket. The 0.9% Additional Medicare is never deductible. SE tax applies to active earned income (Schedule C profits, partnership SE earnings) — not to passive income like rentals, dividends, or capital gains.
How SE tax is calculated
SCHEDULE SE STEP-BY-STEP
- 1.Start with net business profit from Schedule C (gross income minus business expenses).
- 2.Multiply by 92.35% — this gets you "net SE earnings" (the IRS rounding for the employer-half adjustment).
- 3.If under $400 → no SE tax. Otherwise apply 12.4% Social Security on the lesser of net SE earnings or ($184,500 minus W-2 wages already subject to FICA).
- 4.Apply 2.9% Medicare on the full net SE earnings (no cap).
- 5.If net SE earnings exceed $200K (single) / $250K (MFJ), add 0.9% Additional Medicare on the excess via Form 8959.
- 6.Deduct half of regular SE tax (lines 3+4 only, NOT step 5) above-the-line on Schedule 1.
SE tax wrinkles to plan for
Net SE earnings under $400 — no SE tax owed
If your net self-employment earnings (Schedule SE line 4c) are under $400 for the year, you owe no SE tax at all. The $400 threshold has been frozen for decades, but it still excludes hobby-level side income. Above $400, every dollar of net SE earnings is subject to the full 15.3% SE tax (until you cross the SS wage cap).
Crossing the Social Security wage base ($184,500 in 2026)
Once your combined wages plus SE earnings exceed $184,500 in 2026, the 12.4% Social Security half of SE tax stops applying to additional dollars. The 2.9% Medicare half keeps applying with no cap. So a $300K SE earner pays 15.3% on the first ~$184,500 and just 2.9% on the rest. This is the single biggest math wrinkle for high-earning sole proprietors.
Crossing $200K (single) or $250K (MFJ) — Additional Medicare kicks in
Net SE earnings above the threshold owe an additional 0.9% Medicare tax (for a total of 3.8% Medicare on the excess). The threshold is per-individual for single filers, combined household for . Self-employed people compute and pay this themselves on Form 8959 — there's no payer to withhold it during the year.
Half of SE tax is deductible — but only the regular 15.3%, not the additional 0.9%
The IRS lets you deduct half of your SE tax (the 'employer half' equivalent) as an above-the-line adjustment to income on Schedule 1. This reduces your and federal income tax — typically saving 10-37% of the deducted amount, depending on your bracket. Crucially, the 0.9% Additional Medicare is NOT part of this deduction. The Social Security 12.4% half plus Medicare 2.9% half = 15.3% combined; you deduct half of that 15.3% (i.e., 7.65% of net SE earnings).
S-corp election eliminates SE tax on distributions, not on salary
If you elect S-corporation status (Form 2553) and pay yourself a 'reasonable salary' as wages plus distributions, only the salary owes (the W-2 equivalent of SE tax). Distributions to the owner pass through SE-tax-free. The IRS scrutinizes 'reasonable salary' — too low triggers audits. Most successful shareholders pay 30-50% of net business income as W-2 salary and the rest as distributions. Net SE-tax savings can be $5,000-$15,000+/yr at high incomes, but adds payroll-processing overhead.
Worked examples
Three scenarios show how SE tax stacks across income levels and structures.
EXAMPLE 1 — Freelance designer, $50,000 net Schedule C profit
- Net business profit
- $50,000
- Net SE earnings (× 92.35%)
- $46,175
- Social Security 12.4% × $46,175
- $5,726
- Medicare 2.9% × $46,175
- $1,339
- Total SE tax
- $7,065
- Above-the-line deduction (half of SE tax)
- −$3,533
- Net cost after federal income tax savings (12% bracket)
- ~$6,641
EXAMPLE 2 — Single consultant, $150,000 net Schedule C profit
- Net business profit
- $150,000
- Net SE earnings (× 92.35%)
- $138,525
- Social Security 12.4% × $138,525 (under $184,500 cap)
- $17,177
- Medicare 2.9% × $138,525
- $4,017
- Total SE tax
- $21,194
- Above-the-line deduction
- −$10,597
- Net cost after federal income tax savings (24% bracket)
- ~$18,651
At this income, SE tax is the single largest tax bill — bigger than federal income tax. S-corp election would split this differently and save ~$8,000-$12,000/yr (see Example 3).
EXAMPLE 3 — Same $150K but with S-corp election (40/60 salary/distribution split)
- W-2 salary to owner (40%)
- $60,000
- FICA on salary (12.4% SS + 2.9% Medicare = 15.3% × $60,000)
- $9,180
- S-corp distribution to owner (60%, no FICA/SE tax)
- $90,000
- Total payroll/SE-tax cost
- $9,180
- Savings vs Schedule C ($21,194)
- −$12,014
- Less S-corp overhead (~$2,500/yr CPA + payroll service)
- ~$2,500
- Net annual S-corp savings
- ~$9,514
The IRS requires "reasonable compensation" as W-2 salary — too low triggers audits. Most S-corps pay 30-50% of net business income as W-2 salary. Always consult a CPA on the salary level.
SE tax vs FICA — same taxes, different paths
| W-2 Employee (FICA) | Self-Employed (SE Tax) | |
|---|---|---|
| Total rate (employee + employer) | 15.3% (split 7.65% / 7.65%) | 15.3% (you pay all) |
| Visible on paycheck/return | Your 7.65% only (FICA box) | Full 15.3% (Schedule SE) |
| Social Security wage base | $184,500 (2026) | $184,500 (combined w/ wages) |
| Medicare cap | None (1.45% employee + 1.45% employer) | None (full 2.9% on all earnings) |
| Above-the-line deduction | None (employer half not on your return) | Half of regular 15.3% |
| When paid | Each paycheck (withheld) | Quarterly estimated tax + filing |
| Form to compute | W-2 / Form 8959 (high earners) | Schedule SE / Form 8959 |
Calculate your SE tax in context
SE tax stacks with federal income tax, state tax, retirement contributions, and quarterly estimated payments. The freelancer calculator runs the full picture for your business income, expenses, and filing status.
Self-Employment Tax FAQ
Sources & Methodology
Tax rates and thresholds reflect 2026 federal law. Self-employment tax computations follow Schedule SE (Form 1040). Combined SS + Medicare rate of 15.3% breaks down as 12.4% Social Security (capped at the 2026 wage base) plus 2.9% Medicare (uncapped) plus the 0.9% Additional Medicare Tax above $200K single / $250K MFJ thresholds (set by the Affordable Care Act in 2010, not indexed for inflation).
- IRS — Self-Employment Tax (Social Security and Medicare Taxes)
- IRS Schedule SE (Form 1040) — Self-Employment Tax
- IRS Publication 334 — Tax Guide for Small Business
- IRS Topic No. 554 — Self-Employment Tax
- SSA — Contribution and Benefit Base (Wage Base History)
- Internal Revenue Code §1401 (self-employment tax), §1402(a) (definition of net earnings from self-employment), §164(f) (deduction for half of SE tax).