How to Reduce Self-Employment Tax: 6 Legitimate Ways
Deductions that lower net earnings, the S corporation election, retirement contributions, and the health insurance deduction — what works and what doesn't
Reviewed by the Fairlight Accounting cross-border tax team — U.S. & Canadian Tax Desks
Self-employment tax is 15.3 percent of 92.35 percent of net profit, so it falls when net profit falls or when income moves off Schedule C into a form not subject to it. The legitimate routes are claiming every business deduction, electing S corporation status above a certain profit, and hiring your children. Several popular "strategies" do nothing.
On this page
- What actually reduces self-employment tax?
- 1. Deduct everything the business is entitled to
- 2. Elect S corporation status — above the right profit
- 3. Hire your children
- 4. Time income and expenses
- 5. Choose the right partnership structure with a spouse
- 6. Use the health insurance and retirement deductions — for income tax
- Worked example
- Frequently asked questions
- Related guides
- Official sources
- Next step
What actually reduces self-employment tax?
| Method | Reduces self-employment tax? | How |
|---|---|---|
| Claim every business deduction (vehicle, home office, equipment, supplies, insurance) | Yes | Lowers Schedule C net profit, the tax base |
| Section 179, bonus depreciation, de minimis expensing | Yes | Lowers net profit in the year of purchase |
| S corporation election with a reasonable salary | Yes, on distributions | Profit above salary is distributed free of payroll tax; salary carries it |
| Hiring your children under 18 (sole proprietorship or parents-only partnership) | Yes | Their wages are deductible and exempt from Social Security and Medicare |
| Retirement plan contributions (SEP, Solo 401(k)) | No | Deductible for income tax, but self-employment tax is computed before them |
| Self-employed health insurance deduction | No | Same — above the line for income tax only |
| Forming an LLC | No | A single-member LLC is a sole proprietorship for tax; nothing changes |
| The deductible half of self-employment tax | No | Reduces income tax, not self-employment tax |
The table's second half is where the misconceptions live. Retirement contributions and health insurance premiums are valuable — they reduce income tax at the marginal rate — but Schedule SE is computed on Schedule C profit before either, so they leave self-employment tax untouched. And forming an LLC changes liability, not tax: a single-member LLC files Schedule C exactly as a sole proprietor does.
1. Deduct everything the business is entitled to
Every dollar of legitimate business expense saves about 14.1 cents of self-employment tax (15.3 percent on the 92.35 percent base, below the wage base) plus income tax at the marginal rate. The deductions self-employed people most often leave off: the home office and the business mileage it unlocks (the home office guide), the business share of phone and internet, professional development, and equipment expensed under the de minimis election or section 179.
2. Elect S corporation status — above the right profit
An S corporation pays its owner a reasonable salary (subject to the employer and employee payroll taxes — the same 15.3 percent) and distributes the remaining profit free of payroll tax. The saving is 15.3 percent of the distribution portion (2.9 percent plus 0.9 percent above the wage base), against the costs of a corporate return, a payroll system, and the salary's exclusion from qualified business income. The arithmetic turns positive somewhere between US$60,000 and US$120,000 of profit depending on the trade and the defensible salary — the entity guides on this site run it trade by trade. Below that, the election costs more than it saves.
3. Hire your children
A sole proprietor (or a partnership owned only by the child's parents) who employs a child under 18 pays no Social Security or Medicare on the child's wages, and no federal unemployment tax until the child is 21. The wages are a deductible business expense (reducing the parent's Schedule C profit and self-employment tax) and are income to the child — who likely owes no income tax up to the standard deduction and can fund a Roth IRA. The work must be real, the pay reasonable for it, and the records kept. An S corporation loses this exemption, which is one line in the S election worksheet.
4. Time income and expenses
Under the cash method, a December equipment purchase or a January invoice moves profit between years — useful when one year's earnings are near the Social Security wage base (US$184,500 for 2026; earnings above it are taxed at 2.9 percent rather than 15.3 percent, so bunching income into a year already over the base costs less self-employment tax than spreading it).
5. Choose the right partnership structure with a spouse
Spouses running a business together as a partnership each pay self-employment tax on their share — doubling the Social Security credits earned, which is a benefit, not a saving. A spouse paid as an employee instead shifts income into wages with the same total payroll tax. The qualified joint venture election — for spouses who co-own the business directly (not through an LLC or other state-law entity), both materially participate, and file jointly — simplifies the filing without changing the total tax.
6. Use the health insurance and retirement deductions — for income tax
They do not reduce self-employment tax, but a self-employed person who skips a Solo 401(k) or SEP contribution because it "doesn't help with SE tax" is leaving income tax savings at the marginal rate on the table, plus the QBI threshold effect for those near it.
Worked example
A consultant nets US$140,000 on Schedule C: self-employment tax about US$19,800. Claiming a previously omitted home office and the 9,000 miles it converts from commuting saves about US$1,100 of self-employment tax and US$1,700 of income tax. Electing S corporation status with a US$95,000 salary leaves US$45,000 of distributions — saving about US$5,250 of payroll tax against roughly US$2,500 of added costs (return, payroll, state fee) and about US$18,500 less QBI deduction — at this salary the lost deduction can erase the saving, which is why the salary is modeled before electing. Employing his 16-year-old for real bookkeeping work at US$8,000 a year saves about US$1,100 of self-employment tax and moves US$8,000 into a bracket where it is untaxed. His US$25,000 SEP contribution saves US$6,000 of income tax and nothing on Schedule SE — still worth making.
Frequently asked questions
Does an S corporation eliminate self-employment tax?
It replaces it: the owner's salary carries the same 15.3 percent as payroll tax, and only the distributions above salary escape it. The saving is real above a certain profit and negative below it.
Do retirement contributions reduce self-employment tax?
No. Self-employment tax is computed on Schedule C profit before retirement contributions. They reduce income tax.
Does the home office deduction reduce it?
Yes. It is a Schedule C expense that lowers net profit, and the business mileage it makes deductible lowers it further.
Can I avoid it by forming an LLC?
No. A single-member LLC is taxed as a sole proprietorship; a multi-member LLC as a partnership. Only an S (or C) corporation election changes the payroll tax treatment.
Official sources
The IRS states: “The self-employment tax rate is 15.3%. The rate consists of two parts: 12.4% for social security (old-age, survivors, and disability insurance) and 2.9% for Medicare (hospital insurance).” — Internal Revenue Service, Self-employment tax (Social Security and Medicare taxes), https://www.irs.gov/businesses/small-businesses-self-employed/self-employment-tax-social-security-and-medicare-taxes
The IRS states: “S corporations are corporations that elect to pass corporate income, losses, deductions, and credits through to their shareholders for federal tax purposes. Shareholders of S corporations report the flow-through of income and losses on their personal tax returns and are assessed tax at their individual income tax rates.” — Internal Revenue Service, S corporations, https://www.irs.gov/businesses/small-businesses-self-employed/s-corporations
Next step
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