California charges a progressive income tax that ranges from 1% to 13.3%

California's state income tax is progressive, meaning the percentage you pay increases as your income increases. You do not pay one flat rate on all your income. Instead, your income is divided into brackets, and each bracket is taxed at its own rate. The lowest bracket starts at 1% and the highest reaches 13.3%. Where you fall depends on how much you earned that year and your filing status (single, married filing jointly, head of household, or married filing separately).

The state also adds a 1% Mental Health Tax on income over $1 million per year. This is separate from the regular income tax brackets and applies to high earners only. For most Californians, the top rate they encounter is somewhere between 9.3% and 12.3%, depending on their total income.

Key Takeaways

  • California income tax brackets change every year based on inflation, so the income ranges that trigger each rate shift annually.
  • Your tax rate depends on your filing status and total income, not on where you live within California.
  • The state withholds taxes from paychecks based on a W-4 form you complete with your employer.
  • You file California taxes using Form 540 (or Form 540-2EZ for simpler returns) by the same April deadline as federal taxes.

How tax brackets work in California

Each tax bracket represents a range of income. When your income falls into a bracket, only the money in that bracket is taxed at that rate. The money in lower brackets is taxed at lower rates. For example, if you are single and earn $50,000 in 2024, you do not pay 9.3% on all $50,000. You pay 1% on the first portion, then 2% on the next portion, then 4% on the next, and so on, until your income reaches $50,000.

The California Franchise Tax Board (FTB) publishes the exact bracket ranges each year. These ranges shift upward annually to account for inflation. A bracket that covered $0 to $10,000 one year might cover $0 to $10,500 the next year. You can find the current year's brackets on the FTB website or on your tax forms. The brackets differ by filing status: single filers have different ranges than married couples filing jointly.

What income counts toward California taxes

California taxes most income you receive: wages from a job, self-employment income, interest, dividends, rental income, and retirement distributions. Some income is excluded. For instance, certain federal benefits (like Social Security, in most cases) and workers' compensation are not taxed by California. Interest from federal bonds is also exempt from state tax.

If you work for an out-of-state employer but live in California, you still owe California tax on that income. If you live outside California but work for a California employer, you may owe California tax depending on the circumstances. The state taxes based on residency and source of income, not just where your employer is located.

How withholding works on your paycheck

Your employer withholds California state income tax from each paycheck based on the information you provide on Form W-4. The amount withheld is an estimate meant to cover your total tax liability for the year. If too much is withheld, you receive a refund when you file your return. If too little is withheld, you owe money when you file.

You can adjust your withholding at any time by submitting a new W-4 to your employer's payroll department. This is useful if your income changes, you have a major life event, or you consistently owe money or receive a large refund. The FTB also provides a withholding calculator on its website to help you estimate whether your current withholding is correct.

Self-employment and estimated tax payments

If you are self-employed or have income that is not subject to withholding, you may need to make estimated tax payments to California four times per year. These payments are due in April, June, September, and January. The amounts are based on your expected income and tax liability for the year.

You calculate estimated payments using Form 540-ES, which the FTB provides. If you do not make estimated payments and you owe a large amount at tax time, you may face penalties and interest. However, if your expected tax is under a certain threshold (which varies by year), you may not be required to make estimated payments.

Filing your California tax return

Most California residents file using Form 540 (the full return) or Form 540-2EZ (a shorter version for simple returns). The deadline is the same as the federal deadline: typically April 15. You can file by mail or electronically through the FTB website or an approved tax software provider. The FTB offers free filing options for lower-income residents through the Free Tax Program.

When you file, you report all income you received during the year and claim any deductions or credits you are may have access to to. California allows a standard deduction (which increases each year) or itemized deductions, similar to federal taxes. Common credits include the Earned Income Tax Credit (EITC) and the Child and Dependent Care Credit.

Frequently Asked Questions

Does California tax Social Security benefits?

California does not tax Social Security benefits for most people. However, if your total income (including half of your Social Security) exceeds certain thresholds, a portion of your benefits may be taxable. The thresholds are $25,000 for single filers and $32,000 for married couples filing jointly.

What is the difference between California and federal tax rates?

California's top rate is 13.3%, while the federal top rate is 37%. Both use progressive brackets. You pay both California and federal taxes on the same income. Your federal return and California return are filed separately, though they use similar information about your income and deductions.

Can I deduct federal taxes from my California taxes?

No. California does not allow you to deduct federal income taxes paid. However, you can deduct state and local taxes (SALT) on your federal return, up to $10,000 per year. This is a federal limitation, not a California rule.

What happens if I move out of California during the year?

You owe California tax only on income earned while you were a resident. When you move, you become a part-year resident. You file a part-year resident return (Form 540) and report only the income earned during the months you lived in California. You also file a return in your new state for income earned there.

Is there a penalty for filing late or paying late?

Yes. The FTB charges a failure-to-file penalty (typically 5% per month, up to 25%) and a failure-to-pay penalty (0.5% per month, up to 25%). Interest also accrues on unpaid taxes. If you cannot pay by the deadline, you can request a payment plan or an extension from the FTB.