Self-Employment Tax Deductions
Self-employment tax hits at 15.3% before you even touch income tax. But the tax code gives you a deduction that effectively cuts that rate in half — and a handful of legal strategies to shrink the rest.
How self-employment tax works
Self-employment tax is Social Security and Medicare for people who work for themselves. The rate is 15.3% — broken down as 12.4% for Social Security and 2.9% for Medicare. If you're a freelancer, independent contractor, gig worker, or sole proprietor with $400 or more in net earnings, you owe it.
The Social Security portion (12.4%) only applies up to the wage base, which is $168,600 for 2026. Every dollar of net earnings above that escapes the Social Security tax entirely. Medicare (2.9%) has no cap — it applies to every dollar of self-employment income, no matter how high.
Here's what that looks like in practice:
This is separate from income tax. You pay SE tax plus federal income tax, state income tax, and local taxes if applicable. For someone in the 22% federal bracket, the combined marginal rate on self-employment income can hit 37.3% before state taxes — and that's before factoring in the half-SE-tax deduction that brings it down.
Why W-2 employees pay less
When you're an employee, your paycheck shows 7.65% withheld for FICA — the employee half of Social Security (6.2%) and Medicare (1.45%). What you don't see is your employer paying the other 7.65% behind the scenes. Combined, it's the same 15.3%.
But here's the difference: the employer's 7.65% is a deductible business expense for them. You, as a W-2 employee, never see it on your tax return and aren't taxed on it. When you're self-employed, you pay both halves — and that 15.3% comes straight out of your pocket, calculated on your net earnings.
The offset: that employer half you now pay as a self-employed person becomes deductible. The tax code gives you back half of what you paid — not as a credit, but as an above-the-line deduction. It's not a perfect equalizer (a deduction at your marginal rate isn't the same as never paying it), but it's the mechanism the IRS uses to put self-employed workers closer to parity with W-2 employees.
Put another way: a W-2 employee earning $80,000 effectively pays $6,120 in FICA. Their employer pays another $6,120 that never touches the employee's tax return. A freelancer earning $80,000 pays $11,304 in SE tax but deducts $5,652 — netting to about $5,652 in out-of-pocket SE tax cost at the 22% bracket. Close, but not quite even.
The half-SE-tax deduction
This is the big one: you can deduct 50% of your self-employment tax as an adjustment to income on your Form 1040. It goes on Schedule 1, line 15. It's above-the-line — meaning you get it even if you take the standard deduction and don't itemize a thing.
The mechanics are straightforward: calculate your SE tax on Schedule SE. Take half of that number. Enter it on Schedule 1, line 15. That amount reduces your adjusted gross income (AGI), which in turn reduces your taxable income, which reduces your income tax.
This is one of the most overlooked deductions among new freelancers. Tax software handles it automatically if you enter your 1099 income correctly, but many people filing on their own miss it entirely. If you've been self-employed for years and haven't been claiming this, amend your last three returns — it's worth it.
For someone earning $150,000 in net self-employment income, the SE tax comes to $21,194 ($138,525 after the 92.35% adjustment × 15.3%). Half of that — $10,597 — is deductible. At 24%, that saves $2,543 in income tax.
How SE tax is calculated — Schedule SE
The formula lives on Schedule SE and it's simpler than it looks:
- Start with your net profit from Schedule C (or Schedule K-1 for partnerships).
- Multiply by 92.35%. This accounts for the fact that W-2 employees don't pay FICA on the employer's half — by reducing your base to 92.35%, the IRS effectively gives you a deduction for the employer-equivalent portion before calculating the tax.
- Apply 15.3% to that reduced base (split into 12.4% Social Security and 2.9% Medicare, with the Social Security cap applied).
The 92.35% step is the part people misunderstand. It's not a discount — it's a structural adjustment. Think of it as: you pay SE tax on your net earnings minus the "employer half" of the SE tax that you'd be deducting anyway. The net effect is the same as if you calculated 15.3% of 100% of your net earnings, then deducted half the result from your income. The IRS just does the math more efficiently.
If you have multiple Schedule C businesses, you combine the net profits (and any losses) before running through Schedule SE. A $90,000 consulting business and a $10,000 loss from a fledgling e-commerce side project nets to $80,000 for SE tax purposes.
Strategies to reduce your SE tax
S-Corp election
The single most effective SE tax reduction strategy for high-earning freelancers. Elect S-Corp status, pay yourself a reasonable salary, and take the remaining profit as distributions. Only the salary is subject to payroll taxes (FICA). Distributions escape the 15.3% entirely — though they're still subject to income tax.
The catch: the salary has to be reasonable. Pay yourself $30,000 from a $200,000 consulting business and the IRS will come knocking. But a $90,000 salary with $110,000 in distributions? That's defensible — and it saves roughly $16,830 in SE/payroll taxes compared to paying SE tax on the full $200,000 (less the half deduction, of course).
S-Corps come with administrative overhead: payroll processing, quarterly filings, unemployment tax, and an extra tax return (Form 1120-S). The breakeven point is generally around $60,000–$80,000 in net income. Below that, the administrative costs eat up the tax savings. Above it, the math gets compelling fast.
Retirement contributions
Contributing to a SEP IRA or Solo 401(k) doesn't directly reduce your SE tax — the contributions are income tax deductions, not SE tax deductions. But they indirectly lower your SE tax by reducing your taxable income, which frees up cash flow to cover the SE tax burden. And in an S-Corp, employer-side retirement contributions also reduce the salary subject to payroll tax.
A SEP IRA lets you contribute up to 25% of net self-employment earnings, capped at $70,000 for 2026. A Solo 401(k) gives you up to $23,500 in employee deferrals ($31,000 if 50+) plus an employer contribution of up to 25% of compensation, also capped at $70,000 total ($77,500 if 50+). For a freelancer earning $120,000, maxing a Solo 401(k) could mean $23,500 (employee) + ~$22,300 (employer) = ~$45,800 in deductions.
See our retirement plan deductions guide for a full breakdown of contribution limits and which plan fits your situation.
Health insurance deduction
Self-employed health insurance premiums are deductible on Schedule 1, line 17 — another above-the-line deduction. It doesn't reduce SE tax directly, but every dollar you deduct reduces your overall tax burden. Premiums for medical, dental, and long-term care coverage for you, your spouse, and dependents all qualify. The deduction is capped at your business's net profit.
Business deductions
Every legitimate business expense on your Schedule C reduces your net profit — and since SE tax is calculated on net profit, every dollar of deductions reduces your SE tax by about 14.1 cents (15.3% × 92.35%). That home office, that equipment write-off, that software subscription — they all pull double duty, reducing both income tax and SE tax.
A freelancer who goes from $80,000 in gross receipts to $65,000 in net profit through $15,000 in legitimate business expenses saves roughly $2,115 in SE tax alone — on top of the income tax savings on those same $15,000. Our freelancer tax deductions guide covers the full list.
The additional Medicare surtax
There's a 0.9% Additional Medicare Tax that kicks in above certain income thresholds: $200,000 for single filers and $250,000 for married filing jointly. This brings the total Medicare rate to 3.8% on earnings above those thresholds.
The surtax applies to combined wages and self-employment income. If you have a W-2 job paying $160,000 and freelance work netting $55,000, the surtax hits the amount above $200,000 — so $15,000 × 0.9% = $135. It's modest but worth knowing about, especially if you're near the threshold and considering accelerating or deferring income.
Unlike the regular SE tax, the additional Medicare surtax isn't deductible. You can't deduct half of it on Schedule 1. It's purely an extra cost — and one more reason high-earning self-employed workers consider S-Corp election seriously.
Common questions
Do I owe self-employment tax on side income if I already have a W-2 job?
Yes — and it's a common surprise. Your W-2 job withholds FICA on your salary, but your freelance income triggers SE tax separately. There's an interaction with the Social Security wage base: if your W-2 salary alone exceeds $168,600 in 2026, you've already maxed out Social Security and only owe the 2.9% Medicare portion on your freelance income (plus the 0.9% surtax if applicable). But if your W-2 salary is below the wage base, your freelance income fills up the remainder subject to the full 12.4% Social Security — until the combined total hits $168,600.
Can I avoid self-employment tax by forming an LLC?
A standard LLC by itself changes nothing for SE tax. Single-member LLCs are disregarded entities — the IRS treats you exactly like a sole proprietor. A multi-member LLC taxed as a partnership also subjects your share of income to SE tax. The only entity-level change that reduces SE tax is an S-Corp election (or C-Corp, which has its own double-taxation issues). Forming an LLC is about legal liability, not tax avoidance.
How much should I set aside for self-employment tax?
A safe rule of thumb: set aside 15% of net profit for SE tax plus whatever your marginal income tax rate adds. For most freelancers in the 22% bracket, that means roughly 37% total — 15% for SE tax, 22% for federal income tax, and more if your state has income tax. Paying quarterly estimated taxes (Form 1040-ES) avoids the underpayment penalty. File by April 15, June 15, September 15, and January 15.
Does the half-SE-tax deduction reduce my self-employment tax directly?
No — and this is the most common misconception. The half-SE-tax deduction reduces your income tax by lowering your AGI. It doesn't reduce your SE tax. Your SE tax calculation on Schedule SE is unaffected by it. The deduction is a separate line item on Schedule 1 that only touches your income tax return. Think of it as: you pay the full SE tax, but the IRS gives you a break on your income tax as compensation for the employer half you shouldn't have to bear.