Quick Answer
Self-employed workers pay 15.3% self-employment tax (both the employer and employee portions of Social Security and Medicare) on net earnings, plus regular income tax. For 2026, you owe the 12.4% Social Security portion on the first $184,500 of earnings (the 2026 OASDI wage base); the 2.9% Medicare portion has no cap. Quarterly estimated payments are required to avoid penalties.
Key Takeaways
- Self-employment tax is 15.3% on net earnings — 12.4% Social Security + 2.9% Medicare.
- You can deduct 50% of SE tax as an above-the-line deduction on your income tax return.
- Quarterly estimated tax payments are due April 15, June 15, Sept 15, and Jan 15.
- Solo 401(k) and SEP IRA contributions can shelter $72,000+ from income tax in 2026.
Tahir Özcan
Founder & Lead AuthorPersonal-finance researcher & software engineer · WealthCalc · Est. 2025
Tahir built WealthCalc after a decade of modeling household budgets, retirement plans, and mortgage amortization schedules for family and friends. He translates dense regulatory language — IRS Revenue Procedures, SSA COLA announcements, FHFA conforming loan limits — into accurate, usable calculator logic. Every formula is hand-audited against the primary government release and cross-validated with CFA Institute curriculum standards. Read our editorial standards →
- Every figure cites a primary government source
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If you are self-employed, freelancing, or earn 1099 income, you pay both the employer and employee shares of Social Security and Medicare taxes — a combined 15.3%. This is on top of regular federal and state income tax. For many self-employed workers, self-employment tax is actually their largest tax expense.
2026 Self-Employment Tax Breakdown
The 15.3% SE tax rate applies to 92.35% of your net self-employment income:
- Social Security: 12.4% on net earnings up to $184,500 (2026 wage base per SSA 2026 COLA fact sheet)
- Medicare: 2.9% on ALL net earnings (no cap)
- Additional Medicare: 0.9% on earnings above $200,000 (single) or $250,000 (married filing jointly)
- Net earnings calculation: Gross income − business expenses × 92.35%
Quarterly Estimated Tax Payments
The IRS expects you to pay taxes throughout the year — not in one lump sum in April. If you expect to owe $1,000 or more, you must make quarterly estimated payments:
- Q1 (Jan–Mar): Due April 15, 2026
- Q2 (Apr–May): Due June 16, 2026
- Q3 (Jun–Aug): Due September 15, 2026
- Q4 (Sep–Dec): Due January 15, 2027
- Penalty for underpayment: ~8% annualized interest rate on underpaid amounts
Top Self-Employment Tax Deductions
Reducing your net self-employment income directly reduces your SE tax. Key deductions:
- Home office: Simplified method: $5/sq ft, up to 300 sq ft ($1,500). Actual method: percentage of mortgage/rent, utilities, insurance
- Health insurance premiums: 100% deductible above the line for self-employed
- Vehicle expenses: Deduct using the IRS standard mileage rate for business miles (check the current IRS notice for the 2026 rate), or use actual expenses with depreciation
- Retirement contributions: SEP IRA (up to 25% of net SE income, max $72,000) or Solo 401(k)
- Business equipment: Section 179 immediate deduction up to $1,310,000 in 2026 per IRS Rev. Proc. 2025-32 (phase-out begins at $3,270,000 of qualifying purchases)
- Software and subscriptions: All tools used for business are deductible
- Professional development: Courses, conferences, books related to your work
- 50% of SE tax itself: Deductible from income tax (not from SE tax)
Retirement Plans That Slash Your Tax Bill
Self-employed retirement plans are the most powerful tax reduction tool available:
- Solo 401(k): Contribute up to $24,500 as employee + 25% of net SE income as employer. Total max: $72,000 (2026). Plus $8,000 catch-up if 50-59 or 64+, or $11,250 if 60–63.
- SEP IRA: Contribute up to 25% of net SE income, max $72,000. Simpler setup but no Roth option.
- SIMPLE IRA: Employee contribution up to $17,000; employer match up to 3%. Best for small businesses with employees.
S-Corp Election: When It Saves You Money
Once net SE income exceeds roughly $60,000–$80,000, electing S-Corp status can save significant SE tax. As an S-Corp, you pay yourself a "reasonable salary" (subject to SE tax) and take remaining profits as distributions (not subject to SE tax). If you net $120,000 and pay yourself an $80,000 salary, you save SE tax on $40,000 — approximately $6,120/year.
The tradeoff: S-Corp requires payroll processing, additional tax filings (Form 1120-S), and the salary must be "reasonable" for your industry. Consult a CPA before making this election.
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Frequently Asked Questions
How do I calculate quarterly estimated tax payments?
Estimate your total annual tax (income tax + SE tax), subtract any withholding, then divide by 4. A simpler safe harbor: pay 100% of last year's total tax liability divided by 4 (110% if AGI exceeded $150,000). This avoids underpayment penalties even if you earn more this year.
Do I need to pay self-employment tax on side hustle income?
Yes, if net self-employment income exceeds $400 in a year. Even if you have a W-2 job and freelance on the side, the freelance income is subject to SE tax. However, Social Security tax only applies until your combined W-2 and SE earnings reach $184,500 (the 2026 wage base).
Can I deduct business meals in 2026?
Yes, business meals are 50% deductible in 2026 (the temporary 100% deduction from 2021–2022 has expired). The meal must be directly related to or associated with business activity, and you should document the date, amount, attendees, and business purpose. Entertainment expenses (sporting events, concerts) are no longer deductible.
How do estimated quarterly tax payments work for self-employed individuals?
Self-employed individuals must pay estimated taxes quarterly (April 15, June 15, September 15, January 15) to avoid underpayment penalties. Each payment should cover roughly 25% of your expected annual tax liability including self-employment tax. Use IRS Form 1040-ES to calculate payments, or pay 100% of last year tax liability to be safe.
Primary Sources
Last reviewed:
All 2026 figures in this article are pulled from the official statutory releases linked below. We update them within 48 hours of a new IRS Revenue Procedure, SSA COLA announcement, or CMS/FHFA/HUD fact sheet.
- IRS Rev. Proc. 2025-32 — 2026 Inflation Adjustments(published )
- IRS Newsroom — 2026 Tax Inflation Adjustments (incl. OBBBA amendments)(published )
Figures are updated whenever the IRS, SSA, CMS, FHFA, HHS, or BLS publishes a new inflation adjustment or statutory change. This tool is for educational purposes only and does not constitute tax, legal, or investment advice. Consult a qualified professional for decisions affecting your personal finances.