Who Pays and How It Is Calculated

Sole proprietors, freelancers, independent contractors, gig workers, and most LLC members Start with net self-employment income, then multiply by 92.35% to mirror W-2 treatment Apply the 15.3% SE tax rate to the adjusted amount to determine the tax owed The Social Security portion (12.4%) applies only up to the annual wage base ($176,100 for 2025)

The Employer-Equivalent Deduction

You can deduct half of your SE tax on Form 1040 as an above-the-line adjustment This deduction reduces adjusted gross income but does not reduce SE tax itself The deduction is available whether or not you itemize — it appears on Schedule 1 This mirrors how W-2 employers deduct their share of payroll taxes as a business expense

Additional Medicare Tax for Higher Earners

An extra 0.9% Medicare tax applies above $200K (single) or $250K (married filing jointly) This brings the total Medicare rate to 3.8% on income above the threshold There is no employer match on the additional Medicare tax — it falls entirely on you The threshold is not indexed for inflation, so more earners become subject over time

Quarterly Estimated Tax Payments

Self-employed individuals must generally make quarterly payments to avoid penalties Due dates are April 15, June 15, September 15, and January 15 of the following year Estimated payments cover both income tax and SE tax — use Form 1040-ES to calculate Safe harbor: paying 100% of last year's tax (110% if AGI exceeds $150K) avoids penalties

Strategies to Reduce Self-Employment Tax

S-Corp election splits income into salary (subject to SE tax) and distributions (not subject) Maximizing retirement contributions (SEP-IRA, Solo 401k) reduces taxable income HSA contributions lower adjusted gross income for eligible individuals Proper tracking of all legitimate business expenses reduces net SE income directly

Filing Requirements and Common Mistakes

Schedule SE is filed with Form 1040; net SE income flows from Schedule C or K-1 Many new freelancers budget only for income tax and face surprise SE tax bills Setting an unreasonably low S-Corp salary to minimize payroll taxes draws IRS scrutiny Missing quarterly payments can trigger penalties and interest charges

Self-Employment Tax: What It Is, How It Works, and Ways to Reduce It

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What Self-Employment Tax Is

SE tax covers Social Security (12.4%) and Medicare (2.9%) — totaling 15.3% of net SE income
W-2 employees split these taxes with their employer; self-employed pay both halves
SE tax is separate from federal and state income tax — you may owe both on the same income
The tax applies to net earnings of $400 or more from self-employment in a given year

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What Self-Employment Tax Is

Who Pays and How It Is Calculated

The Employer-Equivalent Deduction

Additional Medicare Tax for Higher Earners

Quarterly Estimated Tax Payments

Strategies to Reduce Self-Employment Tax

Filing Requirements and Common Mistakes

Related Topics

Tax Strategies for Sole Proprietors

Earned Income vs Unearned Income

Estimated Tax Payments

What Self-Employment Tax Is

Who Pays and How It Is Calculated

The Employer-Equivalent Deduction

Additional Medicare Tax for Higher Earners

Quarterly Estimated Tax Payments

Strategies to Reduce Self-Employment Tax

Filing Requirements and Common Mistakes

Related Topics

Tax Strategies for Sole Proprietors

Earned Income vs Unearned Income

Estimated Tax Payments