Self-employment tax rate for 2026: what the 15.3 % really costs
The headline rate is simple; the base it applies to, the cap and the interaction with a paycheck are where the estimate goes wrong.
Self-employment tax for 2026
$9,891
Half of the 15.3% part, $4,945, comes off your income
| Net earnings (92.35% of profit) | $64,645 |
| Social Security 12.4% on $64,645 | $8,016 |
| Medicare 2.9% on all of it | $1,875 |
| Additional Medicare 0.9% | $0 |
| Social Security wage base | $184,500 |
Computed by Radif Partners from IRS documents for tax year 2026 · How we calculate · no email asked, nothing sold
The self-employment tax rate is 15.3 %: 12.4 % for Social Security and 2.9 % for Medicare, the employer and employee shares of payroll tax paid by one person. It does not apply to the whole profit. You first multiply net profit by 92.35%, and the 12.4 % part stops once wages and net earnings together reach $184,500 in 2026, a cap the Social Security Administration has set at $192,300 for 2027. Medicare has no cap, and above $200,000 of combined earnings for a single filer ($250,000 joint) an Additional Medicare Tax of 0.9 % is added. On $60,000 of profit the SE tax is $8,478, an effective 14.13 % of the profit. Half of the 15.3 % tax, $4,239 here, is subtracted from income for income tax purposes. Below $400 of net earnings nothing is due.
Enter the net profit of all your businesses combined, the W-2 wages that already carried Social Security tax, and the year. The result splits the tax into its Social Security and Medicare parts, adds the Additional Medicare Tax when it applies, and shows the half you deduct. Switching the year to 2027 applies the higher wage base announced by the Social Security Administration.
What the half-SE-tax deduction is worth
Income tax saved by the deduction
$1,399
| Deduction (half of SE tax) | $6,358 |
| SE tax itself | $12,717 |
QBI left out of this quick check.
Why 15.3 % and not 7.65 %
An employee sees 7.65 % withheld from each paycheck and rarely notices that the employer pays the same amount again. Self-employed people are both sides of that arrangement, so they pay 12.4 % for Social Security and 2.9 % for Medicare. The money funds the same benefits: the SSA uses Schedule SE to credit your earnings record, and the tax applies at any age, even if you already draw Social Security or Medicare (Schedule SE instructions).
The 92.35% step
The rate is not applied to profit directly. Net earnings from self-employment are 92.35% of profit, which mirrors the fact that an employer's half of payroll tax is not part of an employee's wage. So the effective rate on profit is a little lower than the headline: 14.13 % as long as you stay below the cap. The deduction of half the tax then works on the income tax side, not on SE tax itself.
| Net profit | Social Security 12.4 % | Medicare 2.9 % | SE tax | Share of profit |
|---|---|---|---|---|
| $20,000 | $2,290 | $536 | $2,826 | 14.13 % |
| $50,000 | $5,726 | $1,339 | $7,065 | 14.13 % |
| $90,000 | $10,306 | $2,410 | $12,717 | 14.13 % |
| $150,000 | $17,177 | $4,017 | $21,194 | 14.13 % |
| $200,000 | $22,878 | $5,356 | $28,234 | 14.117 % |
| $300,000 | $22,878 | $8,034 | $30,912 | 10.304 % |
The Social Security wage base
The 12.4 % part applies only to the first $184,500 of combined wages and net earnings in 2026. With no job, you hit that cap at about $199,783 of profit. Beyond it, each extra dollar of profit carries only Medicare, which is why the share in the table falls at the top. In 2027 the cap rises to $192,300: on $250,000 of profit, SE tax goes from $29,573 for 2026 to $30,541 for 2027, all of it in the Social Security part.
With a job on the side, wages go first
Wages taxed for Social Security use up the base before self-employment does. A single filer earning $150,000 in salary and $60,000 from a side business has only $34,500 of room left, so Social Security applies to $34,500 of net earnings instead of $55,410. The SE tax drops to $5,885, against $8,478 without the job. Once wages alone reach the base, no 12.4 % is due on any self-employment income, but the 2.9 % Medicare part still is (Publication 334).
The Additional Medicare Tax
A separate 0.9 % applies to earnings above $200,000 single or head of household, $250,000 married filing jointly and $125,000 married filing separately. Wages and self-employment income are added to test the threshold, and a self-employment loss is ignored. These thresholds are not indexed for inflation, so more people reach them each year (Form 8959 instructions). On $300,000 of profit a single filer owes $693 of it on top of $30,912 of SE tax. It is figured on Form 8959, and no half of it is deductible.
Where the deduction for half fits
Half of the 15.3 % tax goes on Schedule 1 as an adjustment to income. It reduces income tax, at your marginal rate, but it never reduces SE tax itself. A person in the 22 % bracket gets back 22 % of that half; the rest of the self-employment tax is a real cost. The Schedule SE guide walks through the lines where each of these amounts appears, and the 1099 tax calculator combines SE tax with income and state tax.
A side gig on top of a salary
Put aside from the side income
30%
| Tax it adds | $4,500 |
| Marginal federal bracket | 22% |
Several businesses and married couples
The base is per person, not per business. Someone with a consulting practice and an online shop adds the two net profits, and a loss in one reduces the other, before a single SE tax is computed. Spouses are treated separately even on a joint return: each one with self-employment income figures their own tax against their own $184,500 cap, so a couple can pay Social Security tax on far more than that amount in total. The Additional Medicare Tax is the exception, since its threshold for a joint return looks at both spouses' combined earnings.
Paying it during the year
SE tax is not billed separately. It sits inside your estimated tax, on line 9 of the 2026 worksheet in Form 1040-ES, which also tells you to use only 92.35% of profit when estimating it. Missing it in the quarterly payments is the usual reason new freelancers face an underpayment penalty, since income tax alone can look small in the first year.
When SE tax is not owed
Below $400 of net earnings for the year, no SE tax is due. Some income never enters the base: rental income from real estate held outside a dealer business, dividends and interest that are not part of the trade, and gains on property that is not inventory. Notary fees go on Schedule C but are exempt from SE tax. The owner of an S corporation pays payroll tax on salary instead, which is the reason for the S corp comparison.