6 legal ways to reduce self-employment tax
The main ways to reduce self-employment tax are claiming every legitimate business expense, electing S-Corp status when your profit supports it, and using a home office and vehicle deduction. Retirement and health insurance deductions cut income tax but generally don't reduce it. W-2 wages can lower the Social Security part.
Updated November 2026 · By Pankil Kumar, Managing Partner
Quick facts
- Best lever. Each deductible dollar lowers profit
- Bigger move. Tax on salary, not all profit
- Doesn't help. Lowers income tax, not SE tax
What actually reduces it?
Self-employment tax is based on your net earnings, so anything that lowers Schedule C profit lowers it.
- Claim every real expense. Track the deductions freelancers miss, since each $1,000 can save over $140 in SE tax, plus income tax.
- Take the home office deduction. If you qualify, it reduces profit.
- Log your mileage. At 72.5 and then 76 cents in 2026, a good mileage log adds up.
- Elect S-Corp status when it fits. You pay payroll tax on your salary, and not on the rest of your profit. Here's when it's worth it.
- Time big purchases. Section 179 lowers profit in the year you buy.
- Use your W-2 wages. Wages from a job count toward the $184,500 Social Security cap for 2026, so SE tax on side income may drop.
What doesn't reduce it?
| Move | Income tax | SE tax |
|---|---|---|
| SEP-IRA or solo 401(k) | Lowers | No change |
| Self-employed health insurance | Lowers | No change |
| QBI deduction | Lowers | No change |
| Half of SE tax deduction | Lowers | No change |
| Business expenses | Lowers | Lowers |
Plenty of online advice mixes these up. A big retirement contribution is still a great move, but it doesn't touch SE tax.
What about hiring family?
Paying your children for real work can move income to a lower bracket, and for a sole proprietor, wages to a child under 18 are free of Social Security and Medicare tax. Here's how it works.
What should you be careful with?
Setting a very low S-Corp salary is the most common risk. The IRS can recharacterize distributions as wages, with back taxes and penalties. Inventing deductions is worse. And remember that lower SE tax also means lower Social Security credits, which can matter later in life.
A short planning review can show you which of these fit. Most owners only need two or three of them.
Sources
General information, not tax advice for your situation.
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See our tax planning and CFO serviceIs there a legal way to avoid self-employment tax?
You can't avoid it on active business income, but you can reduce it with deductions and, when it fits, an S-Corp election.
Does an LLC reduce self-employment tax?
Not by itself. An LLC taxed as a sole proprietorship or partnership still pays it, unless it elects S-Corp treatment.
Do retirement contributions lower self-employment tax?
No. They lower income tax, but not self-employment tax.
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