Most people who go from W-2 employment to self-employment experience the same surprise in their first year: a tax bill significantly larger than expected. The culprit is usually self-employment tax — a 15.3% levy on net self-employment income that covers Social Security and Medicare contributions.
Why the rate seems so high
When you're employed, you pay 7.65% in FICA taxes (Social Security and Medicare) and your employer pays the other 7.65%. Self-employed individuals are both employer and employee, so they pay the full 15.3% — 12.4% for Social Security (up to the wage base, which is $176,100 for 2025) and 2.9% for Medicare on all net earnings.
High earners also owe an additional 0.9% Medicare surtax on earned income above $200,000 (single) or $250,000 (married filing jointly).
The offset deduction
There is a partial offset: you can deduct half of your self-employment tax as an above-the-line deduction on Form 1040. This reduces your adjusted gross income but does not reduce the self-employment tax itself — it only reduces your income tax.
Strategy 1: S-Corporation election
The most powerful tool for reducing self-employment tax for profitable sole proprietors and single-member LLC owners is electing S-Corporation status. Under this structure, business income flows through to you in two ways:
- A reasonable salary you pay yourself (subject to payroll taxes — both halves)
- Distributions beyond the salary (NOT subject to self-employment tax)
The savings can be substantial. For a business generating $200,000 in net profit, even setting a $100,000 reasonable salary shifts $100,000 out of SE tax — saving roughly $14,130 in self-employment tax alone, minus payroll processing costs.
The IRS requires that S-Corp owner-employees pay themselves a "reasonable salary" comparable to what they'd pay an arm's-length employee for the same work. Paying a $30,000 salary for $500,000 in distributions raises a red flag and is specifically on the IRS's radar.
Strategy 2: Qualified Business Income deduction
The Section 199A QBI deduction (from the 2017 Tax Cuts and Jobs Act) allows eligible self-employed individuals and pass-through business owners to deduct up to 20% of qualified business income from their taxable income. This doesn't reduce self-employment tax, but it does significantly reduce income tax on the same earnings.
The deduction phases out for service businesses (attorneys, accountants, consultants) at higher income levels and has complex limitations — making professional guidance valuable here.
Strategy 3: Retirement account contributions
Contributions to SEP-IRAs, SIMPLE IRAs, and Solo 401(k)s reduce your net self-employment income (for income tax purposes) while building retirement savings. A solo 401(k) allows contributions up to $70,000 for 2025 (employee + employer contributions combined), dramatically reducing taxable income.
