California Paycheck Calculator

California runs a genuinely progressive state income tax with nine statutory brackets for 2026: 1%, 2%, 4%, 6%, 8%, 9.3%, 10.3%, 11.3%, and 12.3%, each applying only to the slice of taxable income within that bracket. On top of that statutory schedule, California voters added a separate 1% Mental Health Services Tax on taxable income above $1,000,000, for every filing status — not a higher bracket within the regular schedule, but a second tax layered on top of it.

Because the system is marginal, a single filer with $75,000 of taxable income pays 1% on the first $11,079, 2% on the next slice up to $26,264, 4% up to $41,452, 6% up to $57,542, and 8% on everything from $57,542 up to $72,724 — which, since $75,000 minus the standard deduction in this example lands at $69,294, is where the calculation stops. Only someone earning enough to push taxable income above $72,724 would see any of it taxed at 9.3% or higher.

The standard deduction is applied before any bracket math happens and is a California-specific number, not a share of the federal one: $5,706 for single filers, $11,412 for married filing jointly. A married couple filing jointly gets both a larger deduction and wider brackets than a single filer at the same combined income, which is the main reason the worked example above shows a married filer keeping meaningfully more of an identical $75,000 salary.

At the very top of the schedule, the 1% Mental Health Services Tax applies above $1,000,000 of taxable income regardless of filing status, producing the 13.3% figure commonly cited as California's top marginal rate. It funds county mental health services under Proposition 63 and has applied since 2005 — it is a settled, ongoing feature of California's tax code, not a temporary surcharge.

California withholds a mandatory State Disability Insurance (SDI) tax from every paycheck, separate from and in addition to the state income tax calculated above. For 2026 the rate is 1.3% of all wages, with no annual wage cap — a change from years past, when SDI applied only up to a capped wage base. SDI funds California's short-term disability insurance and Paid Family Leave programs, both of which pay benefits to the same workers who fund them through this withholding.

This calculator shows SDI as its own separate line rather than folding it into the state-tax figure above it, since SDI is not part of California's income tax at all — it is a distinct payroll deduction with its own rate and its own purpose. On the $75,000 single-filer example above, 1.3% SDI comes to $975 a year, or about $37.50 per biweekly paycheck, already included in the $17,310.07 total tax and $57,689.93 net pay shown.

Because SDI applies at a flat 1.3% of all wages with no cap, it does not vary by filing status the way income tax does — a married filer earning the identical $75,000 pays the exact same $975 in SDI as a single filer at that salary. Only the income-tax lines above shift with filing status.

California's own payroll withholding formula, published annually by the Employment Development Department, does not use the exact statutory tax-return brackets directly. Instead, each statutory rate is multiplied by roughly 1.1 for withholding purposes — 8% becomes 8.8%, for example — a deliberate built-in safety margin designed to reduce the odds that an employee is under-withheld over the course of a year and owes a large balance at filing time.

This calculator uses California's statutory brackets (1% through 12.3%, plus the Mental Health Services Tax), the same rates that determine actual tax liability on a California return, not the inflated withholding-only curve. That means this calculator's estimate tracks what someone will actually owe for the year more closely than what a specific paycheck might show being withheld week to week.

In practice, this usually means an employee sees somewhat more withheld from each paycheck across the year than this calculator's per-paycheck figure suggests, with the difference reconciled as a refund when the year's return is filed. It is the same relationship New York's supplemental wage withholding rate has to New York's actual bracket schedule — a withholding mechanism designed for one purpose (steady, safely-sized withholding) that is deliberately not identical to the liability calculation this tool is built to estimate.