Best Free Payroll Calculator

Your paycheck shrinks because the government takes its cut before you see the money. Federal income tax uses progressive brackets — you pay 10% on the first portion of income, 12% on the next chunk, and so on up to 37% for high earners. But here's what surprises people: Social Security and Medicare taxes (called FICA) take 7.65% of every dollar you earn, regardless of income level.

State taxes vary wildly. Nine states take nothing. California grabs over 13% from high earners. Most states fall somewhere in between at 3-8%. The calculator assumes you claim the standard deduction — $13,850 for single filers, $27,700 for married couples in 2024.

Pre-tax deductions like health insurance and 401(k) contributions actually save you money. Every dollar you put toward these benefits reduces your taxable income, which means less federal and state tax. A $300 health insurance premium might only cost you $220 in take-home pay after tax savings.

Use this calculator when evaluating job offers, negotiating raises, or planning major financial decisions. It shows whether a salary increase actually improves your financial position after taxes and helps you budget based on real take-home pay rather than gross numbers.

Do not use this for contract or freelance income — those require estimated quarterly tax payments and self-employment tax calculations. The calculator assumes W-2 employee status with standard payroll deductions. It also cannot handle complex situations like stock options, bonuses with supplemental tax rates, or itemized deductions that exceed the standard amount.

Users often enter gross salary but forget to account for pre-tax benefits. A $75,000 salary with $400 monthly health insurance actually has $70,200 in taxable income — using the full $75,000 overstates take-home pay by roughly $1,800 annually.

Another mistake: assuming tax withholding matches actual tax owed. The calculator shows standard withholding based on your W-4 elections. If you claim extra allowances or have side income, your actual tax bill could be higher or lower than payroll deductions.

People in states without income tax sometimes forget about local taxes. While Texas has no state income tax, some cities impose local taxes that reduce take-home pay. The calculator provides estimates for major states but cannot account for every local jurisdiction.

The calculation follows IRS Publication 15 exactly. First, subtract pre-tax deductions (health insurance, 401(k)) from gross salary to get federal taxable income. Then subtract the standard deduction. Apply progressive tax brackets to what remains — 10% on income up to $11,000, 12% from $11,000 to $47,150, and so on.

FICA taxes are simpler but hit everyone. Social Security takes 6.2% of wages up to $160,200 (2024 limit). Medicare grabs 1.45% of all wages, plus an extra 0.9% on income over $200,000 for high earners.

State taxes range from zero to California's 13.3% top rate. The calculator uses simplified state rates — actual calculations involve state-specific brackets, deductions, and credits. For California single filers, the effective rate starts around 6% and climbs to 9.3% at $100,000 income.

Payroll systems use annualized withholding calculations that can create temporary cash flow advantages. If you receive a large bonus in December, the system assumes you earn that amount every month and overwitholds taxes. You get the excess back at tax time, but temporarily loan the government money interest-free. Savvy employees adjust their W-4 in bonus months to optimize cash flow.