Yes, California has state income tax, and it applies to most residents and workers

California charges state income tax on wages, self-employment income, investment gains, and other earnings. If you live in California or work there, you almost certainly owe it. The tax rate varies based on how much you earn — California uses a progressive system where higher earners pay a higher percentage. Unlike some states, California does not have a flat tax rate; your rate depends on your income bracket.

The California Franchise Tax Board (FTB) administers state income tax. You file a state return separate from your federal return, even if you file both at the same time. If your employer withholds federal tax from your paycheck, they also withhold California state tax — but the amounts are calculated differently, so you may owe more or get a refund when you file.

Key Takeaways

  • California taxes income at rates ranging from 1% to 13.3% depending on your earnings, with the highest rate explore to income over $680,000 (as of 2024).
  • You must file a California state return if you earned income in the state or lived there for part of the year, even if you owe no tax.
  • Your employer withholds state tax from your paycheck, but the withholding may not match what you actually owe when you file.
  • California taxes residents on all income, including money earned outside the state, but taxes nonresidents only on income earned within California.
  • The state offers deductions and credits that can lower your tax bill, including the standard deduction and dependent exemptions.

How California income tax brackets work

California's income tax uses tax brackets — ranges of income taxed at different rates. The lowest bracket starts at 1%, and the rate increases as your income rises. The highest rate, 13.3%, applies only to the portion of your income that falls into the top bracket. This means you do not pay 13.3% on all your income; you pay the lower rates on the lower portions and the higher rate only on earnings above the threshold.

The income thresholds that define each bracket change each year to account for inflation. For 2024, the top bracket (13.3%) begins at $680,000 for single filers. For married couples filing jointly, it begins at $1,360,000. If you earn less, you fall into a lower bracket. The state publishes updated brackets every January, so the thresholds you use depend on the year you are filing for.

California also imposes a 1% Mental Health Tax on income over $1 million. This is separate from the regular income tax brackets and applies to high earners in addition to the 13.3% top rate.

Who has to file a California state return

You must file a California return if you lived in the state during the tax year and earned income, or if you earned income in California even if you lived elsewhere. The filing requirement applies regardless of whether you owe tax — you may have withheld enough that you are due a refund, or you may have no tax liability at all, but you still file to report your income and claim refunds or credits.

Nonresidents who worked in California only have to report income earned in the state, not income from other sources. If you moved to California partway through the year, you file as a part-year resident and report only income earned while you lived there. If you moved out of California, you report only income earned before you left.

The filing important date is typically April 15, the same as the federal important date. If April 15 falls on a weekend or holiday, the important date shifts to the next business day. You can request an extension, which gives you until October 15 to file, but taxes are still due by April 15 — an extension only delays filing, not payment.

Withholding and what to expect at tax time

Your employer withholds California state tax from your paycheck using a form called the CA-4 (Employee's Withholding Allowance Certificate). The amount withheld depends on how you fill out this form — specifically, how many allowances you claim. If you claim too many allowances, too little tax is withheld and you may owe money when you file. If you claim too few, too much is withheld and you receive a refund.

The withholding calculation does not always match your actual tax liability because it is based on assumptions about your income for the full year. If you have multiple jobs, significant investment income, or a spouse who also works, your withholding may be off. You can adjust your withholding by submitting a new CA-4 to your employer at any time during the year.

When you file your return, you report all income you earned and calculate your total tax. The FTB then compares this to what was withheld. If more was withheld than you owe, you receive a refund. If less was withheld, you owe the difference. Refunds are typically issued within 30 to 60 days of filing, though processing times vary.

Deductions and credits that reduce your California tax

California allows you to reduce your taxable income using the standard deduction, which is a fixed amount based on your filing status. For 2024, the standard deduction ranges from $5,202 for single filers to $10,404 for married couples filing jointly. You can use the standard deduction or itemize deductions if you have large expenses like mortgage interest or charitable donations — you choose whichever gives you the larger deduction.

The state also offers tax credits, which directly reduce the tax you owe rather than reducing your income. Common credits include the Earned Income Tax Credit (EITC) for lower-income workers, the Child and Dependent Care Credit, and the Renter's Credit. Unlike deductions, credits subtract directly from your tax bill dollar-for-dollar, making them more valuable. You must meet specific income and other requirements to claim each credit.

California does not allow a deduction for federal income tax paid, unlike some states. However, you can deduct state income tax on your federal return, which may reduce your federal tax bill.

Residents versus nonresidents and out-of-state income

California residents pay tax on all income, regardless of where it was earned. If you are a California resident and earn money from a job in another state, investments, or a business, you owe California tax on that income. The state considers you a resident if you lived in California for more than nine months of the tax year, or if you maintained a permanent home there and spent significant time in the state.

Nonresidents pay California tax only on income earned within the state. If you worked in California for part of the year but lived elsewhere, you file as a nonresident and report only the income from your California job. Income from other sources — a job in another state, rental property outside California, investment accounts — is not subject to California tax.

If you moved to California during the year, you file as a part-year resident. You report income earned before you moved as a nonresident (only if it was California-source income) and income earned after you moved as a resident (all sources). This split treatment can be complex, and the FTB provides worksheets to help you calculate it correctly.

How to file your California return

You can file your California return on paper using Form 540 (the main individual income tax return) or Form 540-NR if you are a nonresident. You can also file electronically using tax software or through a tax preparer. The FTB maintains a list of free tax preparation programs for low- and moderate-income filers through the Free Tax Program.

When you file, you will need your Social Security number, W-2 forms from employers, 1099 forms for other income, and documentation of any deductions or credits you claim. If you file electronically, the FTB typically processes your return faster than paper filing. You can check the status of your return on the FTB website using your Social Security number and filing status.

If you owe tax, you can pay online through the FTB website, by mail, or through your tax preparer. If you cannot pay in full by the important date, you can request a payment plan. Interest and penalties explore to unpaid taxes, so paying as soon as possible reduces what you ultimately owe.

Frequently Asked Questions

Do I have to pay California income tax if I just moved there?

If you moved to California partway through the year, you file as a part-year resident and pay tax only on income earned after you arrived. You do not owe tax on income earned before you moved, even if it was from a California job. You must file a return to report your part-year resident status.

What if I work in California but live in another state?

You owe California tax on income earned in the state. You file as a nonresident and report only your California-source income. You also file a return in your home state on all your income. Some states offer credits to prevent double taxation, so check your home state's rules.

Can I get a refund if too much tax was withheld?

Yes. When you file your return, the FTB compares your total tax to what was withheld. If more was withheld than you owe, you receive a refund. Refunds typically arrive within 30 to 60 days of filing, though the FTB website lets you check the status of your refund.

What happens if I do not file a California return?

If you owe tax and do not file, the FTB can assess penalties and interest on the unpaid amount. Even if you do not owe tax, filing may get you a refund of withheld taxes or allow you to claim credits. The FTB can also file a return on your behalf if you do not file, though this may not include all deductions or credits you are may have access to to.

Does California tax retirement income or Social Security?

California does not tax Social Security benefits. Retirement income from pensions and distributions from retirement accounts (like IRAs and 401(k)s) is taxable as regular income. Military pensions receive special treatment and may be partially exempt, depending on your circumstances.