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)