Yes, California has a state income tax, and it is one of the highest in the country

California taxes income earned by residents and non-residents who work in the state. The tax rate ranges from 1% to 13.3% depending on your income level, with the highest rate applying to income over $680,000 (as of 2024). Unlike some states, California taxes wages, investment income, retirement distributions, and self-employment income.

The state collects this tax through the Franchise Tax Board (FTB), which is California's tax authority. You pay through payroll withholding if you are an employee, or by making estimated quarterly payments if you are self-employed or have investment income. Non-residents who work in California may also owe state tax on income earned within the state, even if they live elsewhere.

Key Takeaways

  • California's state income tax rate starts at 1% and reaches 13.3% on the highest incomes, making it one of the steepest in the nation.
  • The Franchise Tax Board collects California income tax, and you report it on Form 540 (residents) or Form 540-NR (non-residents).
  • Employees have tax withheld from paychecks automatically, while self-employed people and those with investment income must pay estimated taxes quarterly.
  • Non-residents working in California owe state tax on income earned in the state, even if they live in a state with no income tax.
  • California offers tax credits and deductions that can lower your tax bill, including the Earned Income Tax Credit (EITC) for lower-income workers.

How California's tax brackets work

California uses a progressive tax system, meaning your tax rate increases as your income increases. You do not pay the top rate on all your income — only on the portion that falls within each bracket. For example, if you are single and earn $50,000, you pay 1% on the first portion, then 2% on the next portion, and so on, only reaching higher rates on income above certain thresholds.

The exact brackets change each year because California adjusts them for inflation. A single filer in 2024 pays 1% on income up to $10,099, then 2% on income from $10,100 to $23,942, and the rate continues to climb through nine brackets until reaching 13.3% on income over $680,000. Married couples filing jointly have higher thresholds at each bracket. The FTB publishes updated brackets every January on its website.

Your filing status (single, married filing jointly, head of household, or married filing separately) determines which bracket applies to you. If your income straddles a bracket boundary, only the income in the higher bracket is taxed at the higher rate.

What income counts and what does not

California taxes most forms of income: W-2 wages, self-employment income, interest, dividends, capital gains, rental income, retirement account distributions, and gambling winnings. If you receive income from any of these sources and you live in California or worked in California during the year, you likely owe state tax on it.

Some income is exempt. Social Security benefits are not taxed by California. Certain disability benefits, workers' compensation, and some military pay are also excluded. Municipal bond interest is generally not taxed. If you are unsure whether a specific income source is taxable, the FTB website lists exemptions, or you can contact the FTB directly.

Payroll withholding and estimated taxes

If you are an employee, your employer withholds California income tax from each paycheck based on the W-4 form you complete. The amount withheld depends on your income, filing status, and the number of dependents you claim. If too much is withheld, you receive a refund when you file your return. If too little is withheld, you owe when you file.

If you are self-employed, a contractor, or have significant investment income, you must make estimated tax payments to the FTB four times per year (usually in April, June, September, and January). These payments are due on specific dates set by the FTB. Missing estimated payments can result in penalties and interest, even if you ultimately owe no tax or are due a refund.

You can adjust your withholding at any time by submitting a new W-4 to your employer. If you expect a major change in income — a job loss, a raise, or retirement — updating your withholding can help you avoid a large bill or overpayment at tax time.

Tax credits and deductions that lower what you owe

California offers several tax credits that directly reduce the amount of tax you owe. The Earned Income Tax Credit (EITC) is available to lower-income workers and can result in a refund even if you owe no tax. The amount depends on your income, filing status, and number of dependents. You must claim it on your tax return to receive it.

Other credits include the Child and Dependent Care Credit, the Renter's Credit (for renters with low to moderate income), and various education-related credits. Deductions — such as the standard deduction or itemized deductions — reduce your taxable income before the tax rate is applied, which lowers your overall tax bill.

The standard deduction for 2024 is $5,202 for single filers and $10,404 for married couples filing jointly. If your income is below the standard deduction, you may not owe California income tax at all, though you might still file to claim refundable credits like the EITC.

Non-residents and part-year residents

If you moved to California partway through the year, you are a part-year resident and owe tax only on income earned while you lived in the state. If you moved out of California, you owe tax only on income earned before you left. You file Form 540-NR/PY (non-resident or part-year resident return) instead of the standard Form 540.

Non-residents who work in California — for example, someone living in Nevada who works in California — owe California tax on income earned in the state. They file Form 540-NR. The state has reciprocal agreements with some neighboring states that may reduce or eliminate this tax, but you must still file to claim the exemption.

When and how to file your return

California income tax returns are due on the same date as federal returns, typically April 15. You file using Form 540 (residents) or Form 540-NR (non-residents). You can file online through the FTB website, use tax software, or file by mail. If you need more time, you can request an extension, which gives you until October 15 to file — though taxes are still due by April 15 or you will owe interest and penalties.

You must file even if you do not owe tax, if you are due a refund, or if you want to claim a refundable credit like the EITC. The FTB processes returns and issues refunds, which typically arrive within 30 days of filing if you file electronically and choose direct deposit.

Frequently Asked Questions

Do I have to pay California income tax if I live out of state but work in California?

Yes, you owe California tax on income earned in the state. You file Form 540-NR and report only the income you earned in California. Some states have reciprocal agreements with California that may exempt you, so check the FTB website to see if yours does.

What happens if I do not file or pay my California taxes?

The FTB can assess penalties and interest on unpaid taxes. Penalties start at 5% of the unpaid amount and can reach 25% if the tax remains unpaid for a long time. Interest accrues daily. The FTB can also place a lien on your property or garnish your wages to collect.

Can I deduct federal income tax from my California taxes?

No, California does not allow a deduction for federal income tax paid. You can deduct state and local taxes (SALT) on your federal return, but not the reverse.

Is retirement income taxed by California?

Most retirement income is taxed. Distributions from 401(k)s, IRAs, and pensions are taxable. Social Security is not taxed by California. Military retirement pay has special rules depending on when you served.

What if I owe more than I can pay right now?

The FTB offers payment plans and installment agreements. You can request a plan online or by phone. Interest and penalties continue to accrue, but a payment plan lets you pay over time rather than facing collection action immediately.