California Income Tax Calculator United States

What the California income tax calculator does

The California income tax calculator estimates the state income tax you owe to California and your income after that tax. It subtracts the California standard deduction, applies California’s progressive brackets to the remaining taxable income, and adds the 1% Behavioral Health Services Tax when taxable income passes the surcharge threshold.

California has one of the most graduated income tax schedules in the country, and its tax comes on top of federal income tax, payroll taxes and any local levies. Seeing the state portion on its own helps when you compare job offers, plan a move or budget around your take-home pay.

Why filing status matters

The calculator supports single and married filing jointly, the two most common statuses. Each has its own bracket schedule and standard deduction, so the same income can produce different tax depending on the status you choose.

The joint brackets are generally wider than the single ones, which can lower the tax on a combined household income compared with two single filers. With two earners, the joint schedule taxes your incomes together, which changes the bracket each dollar falls into. Check which status applies to you before relying on the result.

How the calculation works

• It starts from the income you enter, adds any additional taxable income, and subtracts pre-tax deductions.
• It subtracts the California standard deduction for your filing status to reach taxable income.
• It applies California’s progressive brackets to that taxable income, taxing only the income within each band at that band’s rate.
• It adds the 1% Behavioral Health Services Tax on any taxable income above the surcharge threshold.
• It subtracts the total from your gross income to show your after-tax amount.

The brackets are marginal, so moving into a higher bracket never reduces your take-home pay. Only the income inside each bracket is taxed at that bracket’s rate, and the top rate applies only to income above the highest threshold.

The Behavioral Health Services Tax

California adds a 1% surcharge, the Behavioral Health Services Tax (called the Mental Health Services Tax until 2025), on taxable income above $1,000,000. It is sometimes called the millionaire’s tax. It applies only to the amount above the threshold: a filer with $1,200,000 of taxable income pays it on $200,000, adding $2,000 to the bill. Below the threshold the surcharge is zero.

The surcharge pushes California’s top rate above the highest bracket rate, so high earners in the state face one of the steepest combined marginal rates in the country once federal tax is added. The calculator shows the surcharge separately.

Deductions and taxable income

Tax is based on taxable income, not gross pay. The calculator applies the California standard deduction for your filing status. If you would itemize on your California return instead, you can approximate that by adjusting the income you enter; itemizing only helps when your eligible expenses exceed the standard deduction.

Pre-tax deductions such as 401(k) or health savings account contributions also lower the income that is taxed. Enter them separately and they reduce your taxable base before the brackets apply, which can move income out of a higher bracket.

What you need to enter

• Your gross annual income.
• Your filing status, single or married filing jointly.
• Any additional taxable income and pre-tax deductions, if you want a more precise figure.

If your income varies through the year, enter your expected annual total instead of scaling up a single paycheck, since the brackets apply to the full year.

Reading your result

The output separates the bracket tax from the Behavioral Health Services Tax, shows your taxable income and the standard deduction applied, and gives your after-tax income and effective rate. The effective rate is the share of your gross income that goes to California tax, and it is always below your top marginal rate because the lower brackets tax your first dollars more lightly.

Credits, other adjustments and income not entered here can change the result. California offers various credits that this estimate does not model, so treat the figure as a starting point, not a filed return. Brackets and thresholds change over time, so revisit the estimate when your income or filing status changes.

This is general information only and not financial or tax advice. Confirm specifics with a qualified tax professional.

About This California Income Tax Calculator

Use this California income tax calculator to get an instant, accurate estimate. The figures follow official guidance and every rate and threshold is kept up to date for 2026. Adjust the inputs above to match your situation, or browse all our calculators to plan your next step.