Self-Employment Tax — Social Security & Medicare for the Self-Employed
The self-employment tax is how self-employed individuals pay their Social Security and Medicare taxes — the same taxes that employees pay through FICA payroll withholding, but at double the rate because self-employed workers are both the "employer" and the "employee." For 2026, the self-employment tax rate is 15.3% on net self-employment earnings: 12.4% for Social Security (on earnings up to the Social Security wage base — $176,100 in 2026) and 2.9% for Medicare (on all earnings, with no cap). An additional 0.9% Medicare surtax applies to self-employment earnings above $200,000 ($250,000 for married filing jointly). The tax is calculated on Schedule SE and reported on your Form 1040. You can deduct 50% of your self-employment tax as an above-the-line deduction (reducing your adjusted gross income) — this represents the "employer half" that regular employers deduct as a business expense. Self-employment tax applies to anyone with net self-employment earnings of $400 or more — freelancers, independent contractors, gig workers, sole proprietors, and partners in partnerships. The tax is governed by the Self-Employment Contributions Act (SECA) (26 U.S.C. §§ 1401–1403), the self-employed equivalent of FICA. For many self-employed workers, particularly those earning under $100,000, the self-employment tax is actually larger than their income tax — making it the most significant tax they pay.
Current Law (2026)
| Parameter | Value |
|---|---|
| Governing statute | Self-Employment Contributions Act (26 U.S.C. §§ 1401–1403) |
| Total rate | 15.3% (12.4% Social Security + 2.9% Medicare) |
| Social Security wage base | $176,100 (2026) — 12.4% applies only up to this amount |
| Medicare | 2.9% on all earnings — no cap |
| Additional Medicare tax | 0.9% on earnings above $200,000 ($250,000 MFJ) |
| Threshold | Applies when net self-employment earnings ≥ $400 |
| Deduction | 50% of SE tax deductible (above-the-line, Schedule 1) |
| Net earnings calculation | 92.35% of net self-employment income (accounting for employer-equivalent deduction) |
| Reported on | Schedule SE (Form 1040) |
Legal Authority
- 26 U.S.C. § 1401 — Rate of self-employment tax (Social Security and Medicare rates)
- 26 U.S.C. § 1402 — Definitions (net earnings from self-employment, self-employment income)
- 26 U.S.C. § 164(f) — Deduction for 50% of self-employment tax
How It Works
Self-employment tax applies if you have net earnings from self-employment of $400 or more — this covers sole proprietors (Schedule C income), independent contractors (1099-NEC), gig workers, partners in partnerships (distributive share), LLC members (unless the LLC elected S-corp taxation), and farmers (Schedule F). S-corporation shareholders who work in the business pay FICA on their salary only, not on distributions — one of the primary reasons small businesses elect S-corp status. Before applying the 15.3% rate, you multiply net SE income by 92.35% (100% minus 7.65%) — this adjustment accounts for the fact that employees pay FICA only on wages while employers deduct their half, putting self-employed workers on equivalent footing. On $100,000 of Schedule C profit, taxable SE earnings are $92,350 and SE tax is approximately $14,130 (15.3% × $92,350).
You can then deduct half of that SE tax as an above-the-line adjustment on Schedule 1 of Form 1040 — this reduces your AGI (affecting other deductions and credits) and represents the "employer portion" that regular employers deduct as a business expense, but it does not reduce the SE tax itself. Because self-employed workers have no employer withholding, you must also make quarterly estimated tax payments (Form 1040-ES) covering both income tax and SE tax, due April 15, June 15, September 15, and January 15. Underpayment triggers a penalty at filing; the safe harbor is paying at least 100% of your prior year's total tax (110% if prior-year AGI exceeded $150,000).
How It Affects You
If you're a freelancer, independent contractor, or gig worker: Self-employment tax hits hard because you pay both sides — the 15.3% that employees and employers split. On $60,000 of net freelance income: your taxable SE earnings are $55,410 (60,000 × 92.35%), and your SE tax is approximately $8,478 (15.3% × $55,410). Then you deduct half that ($4,239) above the line, reducing your AGI — but you still owe the full $8,478 in SE tax. In total, a $60K self-employed person in the 22% income tax bracket typically owes about $8,478 in SE tax plus $5,500–$8,000 in income tax depending on deductions — meaning effective set-aside rates of 28-30% are realistic, not conservative. Quarterly estimated payments are required to avoid underpayment penalties; deadlines are April 15, June 15, September 15, and January 15 (for the prior Q4). Safe harbor: pay at least 100% of your prior year's total tax liability (110% if your prior-year AGI exceeded $150,000). Use IRS Form 1040-ES to calculate and pay.
If you're a profitable sole proprietor considering S-corporation election: The S-corp SE tax savings are real but often overstated. A sole proprietor earning $200,000 in net business income pays approximately $26,000 in SECA (15.3% on $184,700 = $28,259, minus 50% deduction benefit ≈ net after-deduction cost of roughly $22,000). An S-corp owner who pays themselves $80,000 in W-2 salary (subject to FICA) and takes $120,000 as distributions (not subject to SE tax) pays FICA on the salary only — approximately $12,000 — saving roughly $14,000 annually. The costs: S-corp election filing (Form 2553), quarterly payroll tax deposits, annual W-2/payroll processing ($500–$2,000/year for a payroll service), and potentially a corporate tax return ($500–$2,000 for a CPA). At net income below roughly $70,000–$80,000, S-corp savings often don't exceed the additional costs. IRS scrutinizes "reasonable compensation" — the salary must genuinely reflect what you'd pay someone else to do your work, or IRS will reclassify distributions as wages and assess back FICA plus penalties.
If you have part-time or side-hustle self-employment income: The $400 net earnings threshold is low — virtually any side income beyond expense reimbursement can trigger SE tax. Driving for Uber ($800/month net after car expenses), selling on Etsy (net profit $500 after materials), or freelancing one project ($1,200) all generate SE tax liability. Keep records of business expenses — they reduce your net self-employment income before the 15.3% applies. Vehicle mileage (67 cents/mile in 2024, updated annually), home office (if exclusive business use), equipment, software, and professional development can meaningfully reduce your taxable SE income. If you also have W-2 wages, the Social Security wage base ($176,100 in 2026) applies across all earnings — so if your W-2 wages already exceed $176,100, your self-employment income only triggers the 2.9% Medicare tax (plus 0.9% if above $200,000), not the 12.4% Social Security portion.
If you're planning for retirement as a self-employed person: Your SE tax payments credit toward your Social Security earnings record — at $60,000 of SE income, you're crediting the full $60,000 toward your Social Security benefit calculation, just as a W-2 employee earning $60,000 would. The contribution option that most directly reduces your tax burden: a SEP-IRA allows contributions up to 25% of net SE earnings (to a maximum of $69,000 in 2026) and reduces your income tax (not SE tax). A Solo 401(k) allows both employee contributions ($23,000 in 2026, plus $7,500 catch-up if 50+) and employer contributions (up to 25% of net SE earnings), capped at $69,000 total — often higher annual limits than a SEP for higher earners who want to maximize savings. Neither SEP-IRA nor Solo 401(k) contributions reduce your SE tax base — only income tax. The QBI deduction provides up to 20% income tax deduction on qualified business income, also not an SE tax reducer.
State Variations
Self-employment tax is exclusively federal — but related state taxes exist:
- Most states don't have a separate self-employment tax — state income tax applies to self-employment income through your state return
- State unemployment insurance (SUTA/SUI) varies — self-employed workers generally don't pay or qualify for state UI
- Some states have specific taxes affecting self-employed workers (California's SDI, New Jersey's FLI)
- Local self-employment taxes exist in some jurisdictions (Philadelphia, for example)
Implementing Regulations
- 26 CFR 1.1401-1 — IRS self-employment tax regulations (computation of net earnings from self-employment and application of the 15.3% rate across Social Security and Medicare components)
- 26 CFR 1.1402(a)-1 through (c)-7 — Definition of self-employment income, trade or business, partners' distributive shares, and statutory exemptions (including ministers, certain farm operators, and notional employer arrangements)
- 26 CFR 31.3121 — FICA tax regulations (defines the relationship between employer FICA obligations and SECA, including the coordination of wage base limits when a worker has both W-2 wages and self-employment income in the same year)
Pending Legislation
Self-employment tax reforms are often included in broader tax legislation. See Federal Income Tax and Social Security for related legislative activity in the 119th Congress.
Recent Developments
The growth of the gig economy has made self-employment tax a larger issue — millions of workers earning income through platforms (Uber, DoorDash, Etsy, Upwork) face self-employment tax for the first time. The worker classification debate (employee vs. independent contractor) directly affects who pays SECA vs. FICA. The QBI deduction (Section 199A, see QBI Deduction) provides up to a 20% income tax deduction for qualified business income — but does not reduce self-employment tax. Proposals to expand Social Security funding by raising or eliminating the wage base cap would significantly increase self-employment tax for higher earners.
- OBBBA tip income SECA exemption (2025): The One Big Beautiful Bill Act included a provision exempting tip income from SECA (self-employment tax) for self-employed workers in tipped industries — consistent with the OBBBA's exemption of tip income from federal income tax for employees. The tip SECA exemption applies to self-employed individuals (not employees) in traditionally tipped occupations; it affects a relatively small population (mostly food service and personal service sole proprietors who receive tips directly). The income tax + SECA tip exemption's combined value for a typical restaurant owner receiving $15,000 in tips is approximately $4,000 in reduced taxes.
- 1099-K and gig economy SECA compliance surge: The delayed implementation of lower 1099-K reporting thresholds ($5,000 for 2024, moving toward $600) is producing a large new population of self-employed taxpayers receiving information returns for the first time. IRS expects 30+ million new 1099-K forms for 2024 returns. Many gig workers — particularly those who don't realize their platform income is self-employment income subject to SECA — are receiving CP2000 notices for underreported income. The SECA burden (15.3% on net self-employment income up to $176,100 for SS; 2.9% unlimited for Medicare) is a significant surprise for first-time gig workers accustomed to W-2 withholding.
- OBBBA Social Security wage base impact on self-employed: The 2026 Social Security wage base (taxable maximum) is $174,900 — indexed annually to national average wage growth. A self-employed person earning $174,900 or less pays 15.3% SECA on all net earnings; above $174,900, only the 2.9% Medicare portion continues. Proposals to eliminate or significantly raise the wage base cap (as part of Social Security solvency legislation) would dramatically increase SECA for self-employed high earners — a physician or attorney earning $400,000 in self-employment income currently pays 2.9% on $225,100 above the cap; a full SECA rate would add $34,000+ in annual taxes.
- S corporation vs. sole proprietor SECA planning: The primary driver of S corporation elections for profitable small businesses is SECA avoidance. A sole proprietor earning $200,000 in net business income pays approximately $26,000 in SECA taxes; an equivalent S corporation owner who pays themselves $80,000 in W-2 wages (reducing FICA to approximately $12,000) and takes $120,000 as distributions (not subject to SE tax) saves approximately $14,000 annually. The OBBBA's 23% QBI deduction and increased shareholder limits have made S corporations even more attractive for this planning strategy, intensifying IRS scrutiny of S corporation reasonable compensation ratios.