Calculate California state income tax with all 10 brackets, SDI, Mental Health Services Tax, dependent credits, and take-home pay estimates.
California has the highest state income tax rates in the nation with a progressive system of 10 brackets ranging from 1% to 13.3%. The top rate applies to income over $1 million and includes the additional 1% Mental Health Services Tax (Proposition 63). Combined with federal taxes, California residents face some of the highest marginal tax rates in the country.
California's bracket structure is notably granular, with rates stepping from 1% on the first $10,412 to 9.3% on income between $68,350 and $349,137 for single filers. Above that, three additional brackets of 10.3%, 11.3%, and 12.3% apply, plus the 13.3% rate for millionaires. The state also levies State Disability Insurance (SDI) at 0.9% on wages up to a specified cap.
This calculator computes your complete California tax liability including all brackets, the Mental Health Services surtax, dependent credits ($439 per dependent), and SDI. It provides a detailed bracket-by-bracket breakdown and take-home pay estimates to help you understand exactly where your California tax dollars go.
California's 10-bracket system with additional surtaxes makes manual tax calculation complex. This calculator provides an instant, accurate breakdown of your state tax liability, helping you plan withholding, estimate quarterly payments, and optimize your California tax position. Keep these notes focused on your operational context. Tie the context to the calculator’s intended domain. Use this clarification to avoid ambiguous interpretation.
California Tax = Sum of (Income in each bracket × Bracket rate) + Mental Health Tax − Credits 10 brackets: 1%, 2%, 4%, 6%, 8%, 9.3%, 10.3%, 11.3%, 12.3%, 13.3% Mental Health Tax = 1% on income over $1,000,000 SDI = 0.9% on wages up to $153,164 Dependent Credit = $439 per dependent
Result: $5,918 state tax
With $100,000 income and $5,540 standard deduction, taxable income is $94,460. California's progressive brackets yield approximately $5,918 in state income tax, for a 5.9% effective rate.
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The highest rate is 13.3% on income over $1 million, which includes the 12.3% top bracket plus the 1% Mental Health Services Tax.
Yes, California's standard deduction is $5,540 for single filers and $11,080 for married filing jointly (2024). These are much lower than the federal standard deduction.
State Disability Insurance is 0.9% on wages up to $153,164 (2024). It funds short-term disability and paid family leave benefits.
No, California taxes capital gains as ordinary income with no preferential rate. This means long-term capital gains can be taxed at up to 13.3%.
California's top rate of 13.3% is the highest state income tax in the US. Combined with the 37% federal top rate, high-income Californians face marginal rates exceeding 50%.
California taxes most retirement income including 401(k) and IRA withdrawals at regular rates. However, Social Security benefits are not taxed by the state.