Self-Employment Tax for LLC Owners (2026 Guide)

Self-employment tax is the Social Security and Medicare tax that active LLC owners pay on their business earnings. Employees split these taxes with an employer, each side paying half. An LLC owner is not an employee of a default LLC, so the owner covers both halves personally. That is why the combined rate feels high the first time you see it on a return.

The tax funds the same programs that payroll taxes fund: Social Security retirement and disability benefits, plus Medicare. Your anonymous LLC status changes nothing here. State-record anonymity hides your name from the public database, but the IRS still knows who owns the entity through the EIN and your filed return, and it still expects the tax.

The self-employment tax rate is 15.3% of net self-employment earnings. That figure is the sum of two separate taxes with different rules. The Social Security portion is 12.4% and applies only up to the annual Social Security wage base, a cap that the government adjusts each year. The Medicare portion is 2.9% and has no cap, so it applies to every dollar of net earnings.

High earners pay one more layer. An extra 0.9% Additional Medicare Tax applies to earnings above set high-income thresholds. Once your net earnings pass the Social Security wage base, the marginal rate on the next dollar drops to the 2.9% Medicare rate, plus the 0.9% surtax if you are over the threshold.

Default LLC members pay self-employment tax on their active share of the profit. A single-member LLC is a disregarded entity, so the owner reports business income on Schedule C and pays SE tax on the net profit. Multi-member LLC partners report their distributive share on a Schedule K-1 and pay SE tax on the active portion.

The word active matters. SE tax hits earnings from work you actually do in the business. Pure passive income, such as rent from a real estate holding or a limited partner's return on capital, falls outside SE tax. If you run a service business, agency, or e-commerce store through your LLC, your profit is active and the tax applies. Read the mechanics for solo owners on our single-member LLC taxes page.

Self-employment tax is computed on Schedule SE, which you file with your Form 1040. You start with your net business profit, then multiply it by 92.35% to reach your net earnings from self-employment. That adjustment exists because employees do not pay Social Security and Medicare on the employer share, and this step keeps self-employed owners on comparable footing.

You then apply 15.3% to the result, capping the Social Security piece at the wage base and running the full 2.9% Medicare piece with no cap. Schedule SE carries the total to your 1040. Because no employer withholds this tax for you, you pay it yourself during the year through quarterly estimated taxes to avoid an underpayment penalty.

You deduct half of your self-employment tax as an above-the-line deduction on Form 1040. This deduction mirrors the employer half that a company would deduct on your behalf if you were on payroll. It reduces your adjusted gross income, so it lowers your income tax even if you claim the standard deduction.

The deduction does not reduce the SE tax itself. You still owe the full 15.3% on Schedule SE. What it lowers is the income tax you pay on top of the SE tax. Treat the two as separate calculations: SE tax on Schedule SE, then income tax on your 1040 with the half-SE deduction already subtracted from AGI.

An S-corp election reduces self-employment tax by splitting your profit into a salary and a distribution. As a default LLC, every dollar of active profit is subject to the 15.3% SE tax. After you elect S-corp treatment, the LLC pays you a reasonable salary that carries payroll tax, and the remaining profit passes through as a distribution that is not subject to SE tax.

The savings are real but conditional. The IRS requires the salary to be reasonable for the work you do, so you cannot zero out the wage to escape all payroll tax. The election also adds payroll filings, a separate return on Form 1120-S, and accounting cost. The math favors an S-corp once net profit is high enough that the distribution savings outrun the added complexity. We walk through the breakeven on our S-corp election page.

Self-employment tax and income tax are two separate charges on the same business profit. Self-employment tax is the flat 15.3% that funds Social Security and Medicare, while income tax is the graduated rate you pay on taxable income after deductions. An LLC owner owes both on the same net earnings.

They are computed on different forms under different rules. Self-employment tax runs on Schedule SE against 92.35% of net profit, with the Social Security piece capped at the wage base. Income tax runs on Form 1040 against your total taxable income, where the standard deduction, the QBI deduction, and your bracket all apply. Because the two stack, a single dollar of active LLC profit carries the 15.3% self-employment charge first and your marginal income tax rate on top.

Plan for self-employment tax by reserving cash for it every time the business is paid and by revisiting an S-corp election once profit is high. The 15.3% charge is predictable, so it belongs in your pricing and your set-aside from day one, not as an April surprise.

Two levers reduce the bite. Retirement contributions to a SEP-IRA or Solo 401(k) lower income tax but not self-employment tax, so they help the income-tax side. The S-corp election is the tool aimed straight at self-employment tax, since it moves distributions outside the 15.3% base. Pay the tax during the year through quarterly estimated taxes so no underpayment penalty attaches, and keep the half-of-SE-tax deduction in view when you project income tax.

Non-resident owners with no US self-employment activity and no effectively connected income do not owe US self-employment tax. Self-employment tax is tied to the US Social Security and Medicare system, and a non-resident who performs no work inside the United States and has no US trade or business income falls outside that system.

This is a genuine distinction, not a loophole. A non-resident who does perform services inside the US, or whose LLC income is effectively connected to a US trade or business, can face US tax obligations and should confirm the treatment with a cross-border tax professional. The honest answer is that facts drive the outcome, and a foreign-owned single-member LLC still carries its own filing duties, including Form 5472, regardless of the SE tax result.