US Paycheck Calculator — California 2026 | Tuxelo

California uses a progressive income tax with nine brackets that range from 1% on the first dollars of taxable income up to 12.3% at the top, plus a 1% Mental Health Services surcharge on income above $1 million. For single filers, the 9.3% bracket starts well below six figures of taxable income — which is why mid-career engineers, nurses, and tradespeople often feel like California taxes punch harder than they expected.

Your employer calculates state withholding using Form DE 4 (California's state equivalent of the federal W-4). If you never filed a DE 4, your employer falls back to your federal W-4 elections, which often leaves Californians under-withheld because the federal form assumes a much flatter state tax. Filing a DE 4 and claiming the correct number of California allowances is the single most impactful move most W-2 earners can make to avoid an April surprise.

California is one of a handful of states that funds its paid family leave and short-term disability program through a dedicated employee payroll tax called State Disability Insurance (SDI). In 2024 California removed the SDI wage base cap entirely — meaning SDI is now withheld on every dollar of wages, not just up to a capped amount. The SDI rate is set each year by the California EDD, so high earners now pay SDI on their full salary rather than stopping partway through the year.

SDI is separate from Social Security, separate from Medicare, and separate from state income tax. It will appear as its own line on your pay stub — usually labeled CA SDI, CA VPDI (for employers in a voluntary plan), or simply SDI. If you're seeing a number in that line that feels larger than you remember, the uncapped base is why.

On top of state-level items, every W-2 employee pays FICA: 6.2% Social Security on wages up to the annual Social Security wage base (set each year by the Social Security Administration), plus 1.45% Medicare on all wages with no cap. If you cross $200,000 in a single employer's wages during the year, your employer must also withhold an Additional Medicare Tax of 0.9% on the excess — regardless of filing status. Households that file jointly reconcile this at tax time; the threshold for married-filing-jointly is $250,000 across both spouses.

California does not have its own Social Security or Medicare equivalent. Those 7.65% (or 8.55% above $200K) are strictly federal.

Most Californians can meaningfully shift their paycheck math through pre-tax elections. 401(k) and 403(b) contributions reduce federal and California taxable income (though not FICA). HSA contributions through a Section 125 cafeteria plan reduce federal, California, and FICA. Traditional health, dental, and vision premiums reduce federal and California but, again, not FICA.

A rule of thumb: every $1,000 you move into a traditional 401(k) saves a California earner in the 9.3% state bracket and 22% federal bracket roughly $313 in taxes today — but it does not reduce your SDI or FICA. HSA contributions are the only common lever that reduces all four.

Unlike New York, Pennsylvania, or Ohio, California does not layer a city income tax on top of state. San Francisco, Los Angeles, and San Diego residents owe only federal + California + FICA + SDI. There is no separate payroll tax on the employee side at the city level. (Employers do pay a local San Francisco Payroll Expense Tax in some cases, but that never appears on an employee pay stub.)

The one exception worth mentioning: a handful of California cities have gross receipts taxes on self-employed people, but those show up on a 1099 and a Schedule C, not on a W-2 paycheck.

The calculator above estimates withholding from the inputs you give it, using the rates for the check date you enter. For the closest estimate, enter your actual pay period (weekly, bi-weekly, semi-monthly, or monthly) rather than trying to annualize in your head — pay frequency changes the withholding bracket lookups, not just the divide-by math. If you contribute to a 401(k) or HSA, enter the per-paycheck amount and mark it as pre-tax so the engine applies it to the correct tax bases.

If your estimate differs from your actual stub, common reasons are (1) a DE 4 that claims different allowances than your federal W-4, (2) an employer-specific 125 plan that isn't in the default deductions list, or (3) imputed income from employer-provided life insurance or benefits. The calculator can't see those from your inputs, but your HR or payroll administrator can reconcile the line items on request.