California Paycheck Guide
California has some of the most involved paycheck withholding rules of any state — a 10-bracket progressive tax, an uncapped disability insurance premium, and a genuinely unusual treatment of HSA contributions. Here's exactly how it works.
State income tax: Method B, 10 brackets up to 14.63%
California's Employment Development Department (EDD) publishes withholding tables under DE 44, Method B (exact calculation). Wages are annualized, reduced by a standard deduction and any allowances claimed on Form DE 4, then run through 10 progressive brackets ranging from 1.1% up to 14.63%. That top rate already includes California's 1% Mental Health Services surcharge that applies to income over $1 million — it isn't a separate line, it's baked directly into the top withholding bracket.
State Disability Insurance: 1.3%, uncapped since 2024
On top of income tax, California withholds State Disability Insurance (SDI) at 1.3% of wages in 2026 — with no wage cap at all. This is a real change from most of SDI's history: before Senate Bill 951 took effect in 2024, SDI had an annual wage cap similar to Social Security. Now it applies to every dollar of wages, meaning high earners in California pay meaningfully more SDI than they would have a few years earlier. See the EDD's contribution rates page for the current rate.
The HSA quirk almost nobody expects
California is one of a small number of states that does not conform to the federal tax treatment of Health Savings Account contributions. Federally, HSA contributions made through payroll reduce your taxable wages — but California requires those contributions to be added back to state taxable wages, meaning they're state-taxed even though they're federal-tax-free. If you contribute to an HSA in California, your federal and state paycheck math genuinely diverge on this one line, not just by a different rate applied to the same number.
What this looks like at different income levels
Because withholding is progressive and SDI is a flat percentage regardless of income, California's effective (blended) withholding rate rises steadily with income — there's no point where it flattens out the way Social Security's wage cap flattens FICA. A $75,000 salary and a $250,000 salary in California don't just pay proportionally more tax; the $250,000 salary pays a meaningfully higher rate, not just a higher amount. See $75,000 in California and $250,000 in California for the actual computed breakdowns side by side.
Calculate your own California paycheck
The California paycheck calculator runs the exact Method B tables above for your actual salary, filing status, and DE 4 allowances, with SDI and the HSA add-back handled automatically.
Estimates for informational purposes only. Not tax, legal, or financial advice. Consult a qualified professional. See the methodology for sources.