How Paycheck Taxes Work in California
How paycheck taxes work in California: Your employer withholds federal income tax based on your W-4, then California state income tax using state withholding tables. Social Security (6.2%) and Medicare (1.45%) are also deducted from each paycheck. California's tax system is designed to place a higher burden on high-income earners. While most residents fall into the 4% to 9.3% range, those earning over $1 million are subject to a 1% Mental Health Services Act surtax. The state offers a complex array of credits and deductions, and withholding is determined by the DE 4 allowance form.
California State Tax Information
California operates one of the most progressive tax systems in the country, with brackets ranging from 1% to 13.3%.
California's tax system is designed to place a higher burden on high-income earners. While most residents fall into the 4% to 9.3% range, those earning over $1 million are subject to a 1% Mental Health Services Act surtax. The state offers a complex array of credits and deductions, and withholding is determined by the DE 4 allowance form.
California is a better state to model carefully when you are comparing job offers, relocations, or remote-work options because state withholding can materially change annual take-home pay.
Federal Income Tax
Federal income tax uses progressive brackets: higher income is taxed at higher rates, not all at one rate. The standard deduction reduces taxable income before brackets apply, and your W-4 affects how much is withheld through the year.
Social Security
Social Security tax (FICA) is 6.2% of wages up to the annual wage base ($184,500 in 2026). Both employee and employer pay this amount; this calculator shows the employee portion.
Medicare
Medicare tax is 1.45% on all wages with no cap. High earners pay an additional 0.9% on wages above $200,000 (single) or $250,000 (married filing jointly).