Self-Employment Tax Explained (2026)

If you freelance, you owe self-employment tax on top of income tax — and it surprises almost everyone in year one. Here’s exactly what it is, how to calculate it, and how to pay it.

What self-employment tax actually is

Self-employment (SE) tax is how the self-employed fund Social Security and Medicare — the same two programs that employees and employers split between them on a W-2 paycheck. When you work for someone else, you see 7.65% come out of each check (6.2% Social Security + 1.45% Medicare) and your employer quietly matches it. When you work for yourself, you are both the worker and the employer, so you pay both halves. That combined figure is 15.3%.

This is the number that blindsides new freelancers. People plan for federal income tax, maybe state tax, and then discover an entirely separate 15.3% layer they never paid as employees because it was hidden in their employer’s share. SE tax is reported on your federal return but it is not income tax — it stacks on top of it.

How much is self-employment tax? Breaking down the 15.3%

The headline rate splits into two parts:

• 12.4% Social Security — charged only up to the annual wage base. For 2025 that cap is $176,100; it is indexed to wage growth and is expected to rise for 2026 (verify the current-year figure with the IRS / SSA before you file). Earnings above the cap are not subject to the Social Security portion.
• 2.9% Medicare — charged on all net earnings, with no cap. High earners also owe an extra 0.9% Additional Medicare Tax on net SE income above $200,000 (single) or $250,000 (married filing jointly).

Crucially, SE tax is not levied on your full profit. You first multiply net profit by 92.35% (0.9235) to reach your taxable base. That 7.65% haircut exists because employees never pay Social Security/Medicare on their employer’s share, and the law mirrors that for the self-employed. The practical result: the effective SE-tax rate on your profit is roughly 14.13%, not the full 15.3%.

The "half deduction" that softens the blow

You get to deduct half of your SE tax (the “employer-equivalent” portion) from your income when calculating income tax. It is an above-the-line adjustment on Schedule 1 — you get it whether or not you itemize. It does not reduce the SE tax itself, but it lowers the income subject to federal (and usually state) income tax, which can be worth hundreds or thousands of dollars.

How to calculate self-employment tax: a worked example

Say you’re a freelance designer with $60,000 of net profit (your 1099 income minus legitimate business expenses). Here is the step-by-step math the IRS uses on Schedule SE:

So on $60,000 of profit you owe about $8,478 in SE tax, and you can knock $4,239 off your income before income tax is calculated. Income tax (federal brackets + any state tax) is then figured separately on top of this. A quick mental shortcut for budgeting: set aside roughly 14–15 cents of every profit dollar for SE tax alone, then more for income tax.

Rough total-tax bands for a single freelancer (2026 estimate)

These blended figures (SE tax + federal income tax, no state tax, standard deduction) help you size a savings target. Treat them as planning estimates, not exact liability:

When you owe it — and when you don't

• The $400 threshold. If your net self-employment earnings are $400 or more in a year, you must file Schedule SE and pay SE tax — even for a tiny side gig and even if you owe no income tax.
• You also have a W-2 job. You still owe SE tax on freelance profit. But Social Security tax you already paid via wages counts toward the wage base, so you won’t pay the 12.4% portion twice once your combined wages + SE income pass the cap. Provide your W-2 Social Security wages on Schedule SE so it doesn’t over-charge you.
• LLCs. A single-member LLC is taxed the same as a sole proprietor by default — full SE tax on profit. An LLC or S-corp election can change this (see below).
• What’s exempt. Investment income, rental income (usually), and W-2 wages are not subject to SE tax.

What is Schedule SE?

Schedule SE is the one-page IRS form where the calculation above happens. The flow is:

1. Report income and expenses on Schedule C → arrive at net profit.
2. Carry that profit to Schedule SE → apply 92.35% and 15.3%.
3. SE tax flows to your Form 1040 (added to total tax); the deductible half flows to Schedule 1.

Most tax software fills Schedule SE automatically once you enter your 1099-NEC income and expenses. If you do it by hand, use the form’s flowchart — there’s a short method and a long method depending on whether you have W-2 wages or claim certain credits.

How to pay self-employment tax

There’s no employer withholding it for you, so the IRS expects you to pre-pay throughout the year via quarterly estimated taxes (Form 1040-ES). SE tax and income tax are bundled into a single estimated payment. The 2026 due dates follow the usual schedule:

Pay electronically — IRS Direct Pay (from a bank account, no fee) or EFTPS are the easiest. To avoid an underpayment penalty, use the safe harbor: pay at least 90% of this year’s tax or 100% of last year’s tax (110% if your prior-year AGI was over $150,000). Hitting the prior-year safe harbor is the simplest way to stay penalty-proof when your income is climbing.

The discipline that prevents disaster: open a separate savings account and move ~25–30% of every client payment into it the day it lands. When the quarterly date arrives, the money is already there. The freelancers who get crushed in April are almost always the ones who spent the tax money during the year.

Legitimate ways to reduce SE tax

• Claim every real deduction. SE tax is calculated on profit, so each dollar of legitimate business expense (home office, software, mileage at the IRS standard rate of ~$0.70/mi for 2025 — verify the current year, equipment, health insurance) lowers both your income tax and your SE tax.
• Fund a retirement plan. A SEP-IRA or Solo 401(k) reduces income tax now. (Note: contributions reduce income tax but generally not SE tax itself — the value is still substantial.)
• Consider an S-corp election once profit is consistently high. An S-corp lets you split earnings into a “reasonable salary” (subject to payroll tax) and distributions (not subject to SE tax). It only pays off after roughly $60k–$80k+ of steady profit because of payroll and accounting overhead — run the numbers with a CPA first.

Most importantly, build SE tax into your rates from day one. If you priced your freelance work like a salary, you under-charged — an employee’s "salary" doesn’t include the employer’s 7.65% match, paid time off, or benefits. Load tax and overhead into your number before you quote a client.

This is general information for 2026, not tax, legal, or financial advice — tax rates, the wage base, and deadlines change, so confirm the current-year specifics with a qualified tax professional or the IRS (irs.gov) before filing.