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Self-Employment Tax: How It Works and How to Reduce It Legally

How the 15.3% self-employment tax works in 2026, the $184,500 Social Security wage base, legal ways to lower it, and popular tactics that don't work.

As of 2026-09-24 · By Alpha Kamara

Short answer: Self-employment tax is 15.3%: 12.4% for Social Security and 2.9% for Medicare. It applies to 92.35% of your net self-employment earnings. For 2026, the Social Security part stops at $184,500 of combined wages and self-employment earnings. You can lower it legally by claiming every legitimate business expense or by electing S-Corp status with a reasonable salary.

If you're a 1099 contractor, sole proprietor, or single-member LLC owner, you pay both halves of Social Security and Medicare yourself. That's self-employment (SE) tax, and it's separate from income tax. Some ways to reduce it are legitimate and well established. Others get repeated online and don't hold up. All figures below come from the IRS and the Social Security Administration (links in Sources).

How self-employment tax works

Item (2026) Rule Source
Total SE tax rate 15.3% (12.4% Social Security + 2.9% Medicare) IRS SE tax page; Topic 554
Share of net earnings that's taxed 92.35% of net earnings from self-employment IRS Topic 554
Filing threshold You generally owe SE tax if net SE earnings are $400 or more IRS Topic 554
Social Security wage base $184,500 (up from $176,100 in 2025) SSA; IRS Pub. 15 (2026)
Maximum Social Security part $184,500 × 12.4% = $22,878 Calculated from SSA figures
Medicare part 2.9% on all net SE earnings. No cap SSA; IRS Topic 554
Additional Medicare Tax 0.9% above $200,000 (single/head of household), $250,000 (married filing jointly), or $125,000 (married filing separately) IRS SE tax page
Income tax deduction Half of SE tax (the "employer-equivalent portion") is deducted in figuring AGI IRS SE tax page

You figure SE tax on Schedule SE and pay it through quarterly estimated taxes along with your income tax. SE tax applies at any age, even if you already get Social Security or Medicare benefits.

Why the 92.35% factor?

As an employee, you'd never pay FICA on the employer's half of FICA. The 92.35% factor (100% minus 7.65%) gives self-employed people a similar adjustment. So on $100,000 of net profit, SE tax applies to $92,350.

How the wage base works if you also have a W-2 job

The $184,500 Social Security limit covers your combined W-2 wages and SE earnings. If your W-2 wages already reach $184,500 in 2026, you owe no Social Security part of SE tax, just the 2.9% Medicare part. If your wages are lower, Schedule SE applies Social Security tax to SE earnings only up to the remaining room.

Legal ways to reduce self-employment tax

1. Claim every ordinary and necessary business expense

SE tax is figured on net earnings: gross business income minus ordinary and necessary business expenses. Every legitimate deductible expense on Schedule C lowers both income tax and SE tax. Keep records that show the business purpose. IRS Publication 334 covers which expenses qualify.

2. Elect S-Corp status and pay a reasonable salary

An LLC or corporation that elects S-Corp status pays you a W-2 salary subject to FICA (the same 15.3% total, split between you and the company). Profit above that salary can go to you as distributions, which aren't subject to employment taxes. The IRS requires the salary to be reasonable compensation for the services you provide. This is the most common legitimate way to reduce SE tax for profitable contractors, and it comes with payroll and filing costs. See our S-Corp election guide and the break-even discussion in LLC vs. S-Corp for 1099 contractors.

3. In an S-Corp, fund retirement with employer contributions

IRS Publication 15 says employer contributions to a qualified plan are exempt from Social Security, Medicare, and FUTA tax. Employee elective deferrals are still subject to Social Security and Medicare. For an S-Corp owner, the employer contribution to a Solo 401(k) (up to 25% of W-2 wages) doesn't add payroll tax. See our Solo 401(k) contribution limits guide.

4. In an S-Corp, run health insurance through the company correctly

Health insurance premiums the S-Corp pays for a more-than-2% shareholder are reported in W-2 Box 1. They aren't subject to Social Security, Medicare, or FUTA when paid under a plan for employees (IRS S corporation compensation guidance). They have to be set up and reported correctly to get this treatment.

5. Hire your minor child in a sole proprietorship (if the work is real)

The IRS says wages a sole proprietor (or a partnership where each partner is a parent) pays a child under 18 aren't subject to Social Security and Medicare tax. The work has to be real and the pay reasonable. This exception doesn't apply if the business is a corporation, including an S-Corp. There, the child's wages are subject to FICA regardless of age.

What doesn't work

  • Forming an LLC by itself. A single-member LLC is disregarded for income tax purposes unless it elects otherwise. Its profit is still SE income on Schedule C and Schedule SE.
  • Electing S-Corp status and paying yourself little or no salary. The IRS can reclassify distributions as wages, and courts have backed that (for example, David E. Watson, P.C. v. U.S., 8th Cir. 2012).
  • Expecting a sole proprietor's retirement contributions to cut SE tax. Sole proprietors deduct their own SEP or Solo 401(k) contributions on Schedule 1 (Form 1040), not Schedule C (IRS Pub. 560). That lowers income tax but not SE tax.
  • Expecting the half-of-SE-tax deduction to reduce SE tax. The IRS says that deduction affects only income tax. It doesn't change your net earnings from self-employment or your SE tax.
  • Assuming S-Corp 401(k) deferrals avoid payroll tax. Pre-tax deferrals reduce W-2 Box 1 wages, not Social Security and Medicare wages (Boxes 3 and 5). Only employer contributions avoid FICA.
  • Paying your child through your S-Corp to use the under-18 exception. That exception doesn't apply to corporations.
  • Deducting personal expenses as business expenses. This cuts SE tax only until an exam, and then comes back with penalties and interest.

Worked example: a sole proprietor's 2026 SE tax (illustrative)

Illustrative only. This simplified, hypothetical example assumes no W-2 wages and income below the Additional Medicare Tax threshold. It isn't advice about what you can deduct. Confirm your figures with your CPA.

Facts (hypothetical): Marcus is a freelance designer and a sole proprietor with $100,000 of 2026 net profit on Schedule C.

Step Calculation Amount
1. Net earnings subject to SE tax $100,000 × 92.35% $92,350
2. Social Security part $92,350 × 12.4% (under the $184,500 base) $11,451.40
3. Medicare part $92,350 × 2.9% $2,678.15
4. Total SE tax Step 2 + Step 3 $14,129.55
5. Income tax deduction for half of SE tax $14,129.55 ÷ 2 $7,064.78

What if Marcus had missed $5,000 of legitimate business expenses? Claiming them lowers SE tax by about $706 ($5,000 × 92.35% × 15.3%), on top of the income tax savings.

What if Marcus contributes $15,000 to a SEP-IRA? His income tax goes down, but his SE tax stays at $14,129.55, because the deduction goes on Schedule 1, not Schedule C.

Frequently asked questions

What is the self-employment tax rate for 2026?

It's 15.3%: 12.4% for Social Security and 2.9% for Medicare, applied to 92.35% of your net self-employment earnings. The Social Security part stops at the 2026 wage base of $184,500 (including any W-2 wages). An extra 0.9% Additional Medicare Tax applies above $200,000 for single filers or $250,000 for joint filers.

What is the 2026 Social Security wage base?

$184,500, up from $176,100 in 2025, per the Social Security Administration. Combined W-2 wages and self-employment earnings above that amount aren't subject to the 12.4% Social Security tax. The 2.9% Medicare tax has no cap.

Do I have to pay self-employment tax on a small side business?

You generally owe it if your net earnings from self-employment are $400 or more for the year, per the IRS. That applies at any age, even if you already get Social Security or Medicare.

Does an LLC reduce self-employment tax?

Not by itself. A single-member LLC is disregarded for federal income tax unless it elects otherwise, so its profit is still subject to SE tax on Schedule SE. The savings come from electing S-Corp status and paying a reasonable salary, not from forming the LLC.

Do SEP-IRA or Solo 401(k) contributions reduce self-employment tax?

For sole proprietors, no. Contributions for yourself are deducted on Schedule 1 (Form 1040), which lowers income tax but not SE tax. In an S-Corp, the employer contribution isn't subject to Social Security or Medicare tax, but employee deferrals still are.

How much S-Corp salary do I need to pay to cut SE tax?

A reasonable salary for the services you provide. The IRS doesn't set a percentage. It looks at factors like duties, time spent, experience, and what comparable businesses pay. A salary set too low to save tax is what the IRS can reclassify as wages.

Is the deduction for half of SE tax the same as reducing SE tax?

No. The IRS says the deduction for the employer-equivalent portion of SE tax only lowers your adjusted gross income for income tax. It doesn't change your net earnings from self-employment or the SE tax you owe.

Can I hire my kids to avoid self-employment tax?

In a sole proprietorship or a partnership owned only by the child's parents, wages for real work paid to a child under 18 aren't subject to Social Security and Medicare tax. If your business is a corporation, including an S-Corp, the child's wages are subject to FICA at any age.

Estimate your own self-employment tax savings

See how much SE tax you'd save with an S-Corp at your profit level, and what that means for your Solo 401(k), using the free IndieVaults tax savings calculator. Or book a free tax analysis, and we'll go through it with your existing accountant. You can also reach us at hello@indievaults.com or (773) 617-5359.

Related guides

Sources

Disclaimer

This guide is for general educational purposes only and is not tax, legal, or investment advice. The worked example is hypothetical and illustrative. Rates and the Social Security wage base are the 2026 figures published by the SSA and IRS as of the date modified above, and rules can change. Your SE tax depends on your net earnings, other wages, filing status, and entity type. Before you change your structure, salary, or deductions, check with your CPA or tax advisor. IndieVaults works alongside your existing accountant and doesn't replace one.

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