Self-Employment Tax: Rate, 2026 Thresholds, and How to File

Self-employment tax is the 15.3% federal tax that independent workers pay on their net earnings to fund Social Security and Medicare, taking the place of the payroll taxes an employer would otherwise withhold. You owe it once your net earnings from self-employment reach $400 in a tax year.¹ The rate covers both the employer and employee halves that W-2 workers split with their company. Paying it also builds your future Social Security retirement and disability benefits, so underreporting income cuts your eventual benefits along with the tax.

Who Owes Self-Employment Tax

The $400 threshold applies to sole proprietors, independent contractors, freelancers, gig workers, and general partners in a partnership.¹ Side income counts. Even if you already have a full-time W-2 job, profits from a side business that qualifies as a trade or business trigger the tax once they cross $400.

The IRS looks at whether you carry on the activity with regularity and a genuine intent to make money. Occasional garage sales don’t qualify; regularly selling products online or providing freelance services does. A lower threshold of $108.28 in church employee income applies to employees of churches or qualified church-controlled organizations.¹

If you run more than one business, combine the results. A loss in one reduces the income from another, and everything goes on a single Schedule SE.² A profitable consulting practice plus a money-losing side venture generates self-employment tax only on the net.

Two groups that might look like they owe the tax generally don’t. Statutory employees, whose employers already withhold Social Security and Medicare, file Schedule C but skip Schedule SE; if box 13 on your W-2 says “Statutory employee,” you fall into this group. The four recognized types are certain delivery drivers, full-time life insurance agents who primarily sell for one company, home workers who process materials supplied by a company, and full-time traveling salespeople.³ Limited partners are generally exempt on their distributive share of partnership income, though guaranteed payments for services they actually perform stay taxable. General partners owe the tax on their full distributive share.

What Income Counts

The tax applies to net profit, not gross revenue. Total business income minus allowable deductions like supplies, advertising, insurance, and business travel gives you the base. Clean records of deductible expenses directly reduce what you owe.

Several income types sit outside the tax. Bank interest and stock dividends generally don’t count unless you trade securities as a business. Rental real estate income is typically excluded, unless you provide substantial personal services to tenants in something like a hotel or boarding house operation. Fees earned as a notary public are specifically exempt, even for someone otherwise self-employed.⁴

The Rate and 2026 Thresholds

The 15.3% rate splits into 12.4% for Social Security and 2.9% for Medicare.¹ The Social Security portion applies only up to the annual wage base, which for 2026 is $184,500.⁵ Combined wages and self-employment earnings above that stop generating the 12.4%. Medicare’s 2.9% has no cap and applies to every dollar.

An Additional Medicare Tax of 0.9% applies above certain filing-status thresholds:

Single, head of household, or qualifying surviving spouse: $200,000
Married filing jointly: $250,000
Married filing separately: $125,000

These thresholds are not indexed for inflation and have been in place since 2013.⁶

How to Calculate It

Before applying the rate, multiply your net business profit by 92.35%. This adjustment reflects that traditional employees don’t pay FICA on the employer’s share of payroll taxes, and it puts self-employed workers on roughly equal footing.⁷

Take $100,000 in net profit as an example:

Adjusted earnings: $100,000 × 92.35% = $92,350
Social Security portion: $92,350 × 12.4% = $11,451.40 (under the $184,500 cap, so the full amount is taxed)
Medicare portion: $92,350 × 2.9% = $2,678.15
Total self-employment tax: $14,129.55

Once adjusted earnings exceed $184,500, cap the Social Security calculation there and apply only 2.9% to the excess.⁵ W-2 wages count toward the cap first, so if you also have wage income, it reduces the self-employment income subject to the 12.4%.

You can deduct half of your self-employment tax as an adjustment to income on Form 1040. For the example above, that’s a $7,064.78 reduction to adjusted gross income.⁷ The self-employment tax itself doesn’t shrink; the deduction only lowers the income base for your regular income tax.

One common confusion worth clearing up: the Section 199A qualified business income deduction does not reduce self-employment tax. It only reduces regular income tax.⁸ The QBI deduction was set to expire after December 31, 2025, so confirm whether Congress has extended it before counting on it for 2026.

Quarterly Payments and Safe Harbor

Self-employed workers send the IRS estimated tax four times a year rather than having taxes withheld each pay period. The 2026 deadlines:

First quarter: April 15, 2026
Second quarter: June 15, 2026
Third quarter: September 15, 2026
Fourth quarter: January 15, 2027

You can skip the January 15 payment by filing your full 2026 return and paying the balance by February 1, 2027.⁹ These payments cover income tax and self-employment tax together.

To avoid an underpayment penalty, your total payments only need to meet one of three tests:

You owe less than $1,000 after all withholding and estimated payments.
You paid at least 90% of the tax shown on your current-year return.
You paid at least 100% of the tax shown on your prior-year return, or 110% if your prior-year adjusted gross income exceeded $150,000 ($75,000 if married filing separately).

Meeting any single test is enough.¹⁰ The prior-year safe harbor is especially useful when income spikes unexpectedly: pay 100% (or 110%) of last year’s tax and you stay penalty-free no matter what this year brings. If your income varies significantly through the year, the annualized income installment method recalculates each quarter’s obligation based on income received to that point.

When the penalty applies, it’s calculated as interest on each quarterly shortfall for the number of days it stayed unpaid. The IRS underpayment interest rate for early 2026 is 7% per year, compounded daily. The IRS will typically calculate the amount and send a bill.

How to File and Pay

Calculate self-employment tax on Schedule SE and file it with your Form 1040.² Quarterly estimated payments go through Form 1040-ES, which includes vouchers for mailed checks.⁹

Two free electronic options exist. The Electronic Federal Tax Payment System (EFTPS) lets you schedule payments in advance, which is handy for setting up recurring quarterly transfers.¹¹ IRS Direct Pay pulls funds directly from a bank account for one-time payments and requires no registration.¹² Credit card, debit card, and digital wallet options are available through third-party processors that charge a convenience fee.

If you owe a balance at filing, the failure-to-pay penalty is 0.5% of the unpaid amount per month (or partial month), capped at 25%.¹³ Interest runs on top of that. This is a separate charge from the estimated tax underpayment penalty, so you can potentially face both.

How Paying Builds Your Social Security Record

Every dollar of self-employment tax earns credits toward future Social Security benefits. In 2026, one credit is worth $1,890 in net self-employment earnings, up to four credits per year.¹⁴ You generally need 40 credits (about 10 years of work) to qualify for retirement benefits, plus a minimum of recent credits for disability coverage. Your eventual monthly benefit is calculated from your highest 35 years of earnings, so consistent reporting shapes what you’ll collect later. Aggressive under-reporting saves tax now and costs benefits later.

Ways to Reduce Your Self-Employment Tax

Since the tax runs on net profit, every legitimate business deduction lowers the base. Common categories include home office expenses, self-employed health insurance premiums, vehicle costs for business use, professional development, and software subscriptions.

Retirement contributions to a SEP-IRA, solo 401(k), or SIMPLE IRA reduce your taxable income for income tax purposes but generally don’t reduce the net earnings on which self-employment tax is calculated. The income tax savings can still be significant, and the accounts grow tax-deferred.

Electing S-corporation status is the strategy most often discussed for cutting self-employment tax on established, profitable businesses. As a sole proprietor or single-member LLC, your entire net profit is subject to the tax. As an S-corp, you pay yourself a salary that carries payroll taxes and take remaining profits as distributions that don’t. The IRS requires the salary to be “reasonable compensation” for the work you actually do, and there’s no bright-line number. Courts weigh training, responsibilities, hours worked, and comparable-industry pay.¹⁵ Setting salary artificially low invites an audit. S-corps also add payroll processing and a separate corporate return, so the math only works once profits comfortably exceed a reasonable salary.

Exemptions Worth Knowing

Members of recognized religious groups that provide for their dependent members and have existed since at least December 31, 1950, can apply for an exemption using IRS Form 4029. The filing deadline is the due date of the tax return for the first year you have self-employment income or become a member of an approved group.¹⁶ Approval permanently waives your right to Social Security and Medicare benefits, and reversal is difficult.

U.S. citizens self-employed abroad can face contributions to two systems at once. Totalization agreements between the U.S. and dozens of countries eliminate this overlap, so you generally pay into only one system. To claim the exemption, get a certificate of coverage from the country that will cover you and attach a copy to your U.S. tax return each year.¹⁷

1
Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes)
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Internal Revenue Service. Instructions for Schedule SE (Form 1040)
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Internal Revenue Service. Statutory Employees
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Internal Revenue Service. Persons Employed in a U.S. Possession/Territory – Self-Employment Tax
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Social Security Administration. Contribution and Benefit Base
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Internal Revenue Service. Topic No. 560, Additional Medicare Tax
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Internal Revenue Service. Topic No. 554, Self-Employment Tax
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Internal Revenue Service. Qualified Business Income Deduction
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Internal Revenue Service. 2026 Form 1040-ES
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Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty
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Internal Revenue Service. EFTPS: The Electronic Federal Tax Payment System
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Internal Revenue Service. Direct Pay With Bank Account
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Internal Revenue Service. Failure to Pay Penalty
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Social Security Administration. Quarter of Coverage
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Internal Revenue Service. Wage Compensation for S Corporation Officers
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Social Security Administration. Social Security Handbook – Claiming the Tax Exemption
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Social Security Administration. U.S. International Social Security Agreements