Self Employment Tax Calculator

Estimate self-employment tax on net business income. The calculator applies the Schedule SE earnings adjustment, Social Security wage base limits, Medicare tax, and Additional Medicare tax assumptions.

Self-Employment Inputs

Schedule SE Estimate

Applies the 92.35% Schedule SE adjustment, Social Security wage base limits, and Medicare rules.

Schedule SE Income

$83,115

Remaining SS Wage Base

$184,500

Social Security Tax

$10,306

Medicare Tax

$2,410

Additional Medicare Tax

Schedule SE Tax

$12,717

Total SE + Addl Medicare

$12,717

Deductible Half

$6,358

Tax data and review status

These tax calculator estimates use 2026 federal income-tax brackets, 2026 FICA values, and state income-tax data that is versioned separately. The page copy and assumptions were reviewed on June 2, 2026. Use the result for planning and comparison, then confirm important decisions with official payroll or tax guidance.

How Self-Employment Tax Is Estimated

Core formula

Net business income × 92.35% = Schedule SE income, then apply Social Security and Medicare rates

Best use case

The calculator adjusts net earnings first, applies the Social Security wage base limit, and then estimates Medicare tax on the adjusted earnings.

Important limits

Optional wage inputs help reduce the remaining Social Security wage base when you also have W-2 income.
Additional Medicare tax is estimated separately because it is not the same as Schedule SE tax.
Federal and state income tax on business profits are not included on this page.

How to interpret self-employment tax correctly

Self-employment tax confuses many users because it is not the same thing as federal income tax. It is the self-employed equivalent of the Social Security and Medicare payroll tax system, and it follows its own adjustment rules before the tax is applied.

A stronger page should explain that difference clearly so users understand why a self-employment tax result can feel large even before federal and state income tax are added on top of business profits.

Business profit is adjusted first

The Schedule SE style calculation starts with adjusted net earnings rather than simply applying payroll-tax rates to gross revenue.

The Social Security cap still matters

Existing W-2 income can reduce the remaining wage-base room available for the Social Security portion of self-employment tax.

This is not your full tax bill

Federal and state income tax on business profit still exist separately from the payroll-tax estimate shown here.

Why self-employment tax feels heavier than many expect

Employees usually see only their own payroll-tax share on a pay stub. Self-employed workers effectively carry both the employee and employer sides for Social Security and Medicare purposes. That is one reason the result can look surprisingly large when someone is moving from W-2 income to contract income.

This page is best used for preliminary business-income planning, contractor comparisons, and deciding whether estimated-tax workflows need closer review.

Important self-employment-tax-calculator limits

Does not include federal or state income tax on business profit
Not a replacement for full Schedule C and Schedule SE filing review
Best used for planning self-employment payroll-tax exposure early

Data sources and editorial checks

Tax rates are stored in versioned JSON files and checked against primary federal, FICA, and state sources during updates. Federal and FICA values are current for 2026; state data is versioned separately when state rules change on a different schedule.

Self Employment Tax Calculator FAQ

What is self-employment tax?

Self-employment tax is the self-employed equivalent of Social Security and Medicare payroll taxes. It generally applies to 92.35% of net business income, subject to the Social Security wage base and Medicare rules.

Does this include federal income tax on self-employment income?

No. This page focuses on Schedule SE style payroll taxes. You may still owe federal and state income tax on business profits in addition to the self-employment estimate shown here.

Why can I enter W-2 wages already subject to Social Security?

Because the Social Security portion of self-employment tax shares the annual wage base ($184,500) with wages already taxed through payroll. Existing W-2 wages can reduce the remaining cap.

Related Tax Calculators

Move to a narrower tax calculator when you need to separate payroll taxes from income taxes or isolate a specific rule such as the Social Security wage base.