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W-2 vs. Self-Employed Tax Burden in 2025

Compare reproducible W-2 and self-employed 2025 tax-burden scenarios, including federal income tax, employee payroll tax, and self-employment tax.

By TrueTaxRate Editorial Team

Updated · No credentialed tax review is claimed.

Direct answer

At the same gross amount, a self-employed worker usually has a different tax mix than a W-2 employee because self-employment tax covers both employee and employer Social Security and Medicare shares, subject to deductions and thresholds. The precise difference depends on business expenses, deductions, credits, state rules, and actual withholding.

Same gross income, different tax mechanics

Both scenarios use $100,000 of gross income in Texas, $30,000 of taxable spending, $1,800 monthly rent, 500 gallons of fuel, no dependents, and no actual-tax overrides. The scenarios also share a $5,000 average exposed money balance. The self-employed model treats the entire amount as net self-employment income. That is a simplifying assumption: real business expenses change net earnings before self-employment tax.

2025 TrueTaxRate model outputs for two synthetic scenarios.
Income typeFederal income taxW-2 payroll taxSelf-employment taxState income taxShared other taxesTotal burdenTrueTaxRate
$100,000 W-2 employee$13,614$7,650$0$0$5,744$27,00827.0%
$100,000 self-employed worker$8,631$0$14,130$0$5,744$28,50428.5%

Sources for this table: IRS Revenue Procedure 2024-40; Social Security Administration contribution and benefit base; IRS self-employment tax guidance; Tax Foundation: state and local sales-tax rates, midyear 2025; Tax Foundation: property taxes by state and county, 2024 ACS data; Zillow Research housing data; Federal Reserve Bank of Philadelphia Working Paper 25-41; Tax Foundation: state gas-tax rates, July 2025; Bureau of Labor Statistics: purchasing power and constant dollars. Shared other taxes include modeled sales, renter property, fuel, and inflation-tax amounts held constant across the two scenarios.

How to interpret the comparison

The W-2 result shows the employee share of FICA, not the employer match. The self-employed result includes the modeled self-employment tax and then applies the permitted half-tax deduction before estimating federal income tax. Neither result models every business deduction, retirement contribution, health-insurance deduction, entity election, or state-specific rule.

Treat this as a comparison of tax mechanics, not a recommendation to choose a work arrangement. Use actual net business income and document-based amounts before making a financial decision.

Why $100,000 of revenue is not the same as $100,000 of wages

A W-2 reports compensation from an employer. A sole proprietor generally starts from business receipts and subtracts ordinary business expenses to determine net earnings. The self-employed row deliberately begins with $100,000 of net self-employment income so it can isolate tax mechanics. It should not be read as a comparison between a $100,000 salary and a business collecting $100,000 before expenses.

Self-employment tax generally applies to 92.35% of net earnings. The Social Security portion uses the annual wage base across covered wages and self-employment earnings; Medicare applies more broadly, with an additional threshold for higher earnings. The calculator also accounts for the federal deduction for one-half of self-employment tax when estimating income tax. That deduction reduces taxable income, but it does not erase the self-employment tax itself.

Liability, withholding, and cash flow

Employees usually see federal income tax and FICA withheld from each paycheck. A self-employed worker may make quarterly estimated payments instead. Those payment schedules affect cash flow, but the TrueTaxRate comparison is about annual estimated tax liability. A large refund or quarterly payment does not by itself make the underlying annual tax higher or lower.

Entity elections, qualified business income, retirement plans, health-insurance deductions, payroll paid through an S corporation, and state business taxes can change a real result substantially. Use this comparison to identify the payroll-tax difference, then replace the simplified net-income input and overrides with values from your own books and return.

Compare your own W-2 and self-employed inputs

Calculation assumptions and limits

These are reproducible educational scenarios, not a quote, filing result, or advice. Federal, state, local, capital-gains, credits, AMT, payroll, sales, and gas inputs use 2025 source coverage. The latest complete owner-occupied property-tax observations used here are from 2024, and the renter model combines those rates with 2025 housing data. Source vintages are identified beside each table. Enter actual values in the calculator when you have them.

Read the full methodology

Primary sources

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