TaxClutch Blog
Self-Employment Tax vs. Income Tax — What Is the Difference?
TaxClutch Team2 min read
New freelancers often think there's one 'tax' they owe. There are at least two — federal income tax and self-employment tax — and they work completely differently. Understanding the split is the first step to predicting your real tax bill.
Self-Employment Tax — 15.3% Flat Rate on Net Profit
Self-employment tax is flat: 15.3% applied to 92.35% of your net profit. There are no brackets. Every dollar above the $400 threshold is taxed at the same 15.3% rate. It funds Social Security (12.4%) and Medicare (2.9%) — the same programs your W-2 paycheck stub already pays into.
Income Tax — Progressive Brackets
Federal income tax uses progressive brackets — 10%, 12%, 22%, 24%, 32%, 35%, and 37%. Each chunk of your taxable income is taxed at the bracket rate that chunk falls into. Your 'effective rate' is the blended average across all the chunks.
How They Stack on Top of Each Other
These aren't 'either/or' — they apply to the same dollars. SE tax hits your net profit first. Half of SE tax is then deducted, lowering your taxable income for income tax purposes. State income tax then stacks on top, calculated separately based on state-specific rules.
On $80k of freelance net profit, a single freelancer in a 5% state owes roughly $11,300 SE tax + $9,500 federal income tax + $4,000 state tax = ~$24,800 total. That's 31% of net profit.
Example — $80k Freelance Income Breakdown
Net profit: $80,000 SE tax: $80,000 × 92.35% × 15.3% = $11,304 Half SE deduction: $5,652 Taxable income: $80,000 − $5,652 − $14,600 std = $59,748 Federal income tax (single): ~$8,727 State (5%): ~$3,987 ────────────────────── Total tax: ~$24,018 (30% of net)
Why Freelancers Pay More Than Employees Total
On the same $80k, a W-2 employee would owe maybe ~$16,000 total tax (federal + employee FICA). The difference is the employer half of FICA — about $6,120 — that the employee never sees, but a freelancer absorbs. This is the single biggest reason freelance taxes feel surprisingly high.
How to Reduce Both With Deductions
A business deduction reduces your net profit. That single move lowers SE tax (saves 15.3%), federal income tax (saves 12-32% depending on bracket), AND state income tax (saves 0-13%). One $1,000 deduction can save a freelancer $300-$500. That leverage is exactly why deduction tracking matters.
Frequently Asked Questions
If I'm in the 22% federal bracket, do I owe 22% + 15.3% = 37.3% on my income?
Approximately, on the marginal dollar — but not on the whole income. Federal income tax is progressive, so your effective rate is lower. SE tax is flat. The combined effective rate for an $80k freelancer ends up around 30%.
Is self-employment tax deductible?
Half of it is. The other half is non-deductible. The deductible half reduces your federal income tax (and indirectly your state tax), but doesn't reduce SE tax itself.
Why is SE tax flat instead of progressive?
Because it funds Social Security and Medicare, which are flat-rate programs. The Social Security portion does have an income cap (~$168,600 in 2024) — above that, only the 2.9% Medicare portion applies.
Do W-2 employees pay self-employment tax?
No. They pay FICA tax (the employee half of what's combined into SE tax for freelancers). The employer pays the other half. Combined, they total the same 15.3% — but the employee only sees half of it.
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