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

California taxes your income at the state level. Unlike some states that have no income tax at all, California residents and anyone earning money in California must pay state income tax on wages, self-employment income, investment gains, and other earnings. The tax rate depends on how much you earn — California uses a progressive system where higher earners pay a higher percentage.

The state also taxes capital gains (profit from selling stocks or property), interest, and dividends. If you live in California or work there, you will owe state tax on that income even if you live elsewhere part of the year.

Key Takeaways

  • California's income tax rates range from 1% to 13.3% depending on your income level, with the highest rate explore to earnings over a certain threshold that changes yearly.
  • You must file a California state tax return if you earned income in the state or lived there during the tax year, even if you do not owe federal tax.
  • California taxes capital gains at the same rate as ordinary income, unlike some other states that treat investment profits differently.
  • Self-employed people in California owe both state income tax and the state portion of self-employment tax.

California's tax brackets and rates

California's income tax is progressive, meaning the rate increases as your income rises. You do not pay one flat rate on all your income — instead, different portions of your income are taxed at different rates. For the 2024 tax year, rates start at 1% on the lowest earners and go up to 13.3% on the highest. The exact income thresholds that trigger each rate change yearly to account for inflation.

The highest rate of 13.3% applies to a relatively small group of very high earners. Most California residents pay somewhere between 2% and 9.3% depending on their total income. The state also added a 1% tax on income over $25 million starting in 2023, which is separate from the regular brackets.

To find the exact brackets for your tax year, check the California Franchise Tax Board website or your tax software — the thresholds shift annually and differ slightly for single filers, married couples, and heads of household.

Who has to file a California state tax return

You must file a California return if you lived in the state at any point during the tax year and earned income above a certain threshold. That threshold varies by filing status and age. Even if you earned very little, you may still need to file if you had any income at all and lived in California.

If you moved to California partway through the year, you still file a full-year return for that year. If you moved out of California, you file a part-year return covering only the months you lived there. You report all income earned during those months, even if it came from work outside the state.

Non-residents who earned money in California also owe state tax on that income, even if they did not live there. This applies to people who worked in California temporarily or had rental property or business income from the state.

Self-employment tax in California

If you are self-employed in California, you owe state income tax on your net business income just like any other earner. You also owe the state portion of self-employment tax, which funds Social Security and Medicare. California does not have a separate self-employment tax — it is included in your regular income tax calculation.

Self-employed people can deduct business expenses (supplies, equipment, a home office) to reduce taxable income. You can also deduct half of your self-employment tax when calculating your adjusted gross income. Keep records of all business income and expenses to support your return.

Capital gains and investment income

California taxes capital gains — the profit you make when you sell stocks, real estate, or other investments — as ordinary income at your regular tax rate. This is different from the federal system, where long-term capital gains often receive preferential rates. In California, whether you held an investment for one year or twenty years, the gain is taxed the same way.

Interest from savings accounts, bonds, and other sources is also taxed as ordinary income. Dividends from stocks are taxed the same way unless they may have access to for a specific exemption. This means investment income can push you into a higher tax bracket if your total income for the year is high enough.

Deductions and credits available in California

California allows you to claim the standard deduction (a flat amount you can subtract from income) or itemize deductions if they are higher. The standard deduction amount changes yearly and depends on your filing status and age. For 2024, the standard deduction for a single filer under 65 is higher than it was in previous years.

The state also offers tax credits for certain situations: the Earned Income Tax Credit (EITC) for lower-income workers, credits for dependent care expenses, and credits for certain types of education costs. Credits are more valuable than deductions because they reduce your tax dollar-for-dollar rather than just reducing the income you are taxed on.

Some income is not taxed at all in California. Social Security benefits are generally not taxed by the state. Certain types of retirement income and disability payments may also be exempt depending on your situation.

When and how to file your California return

California follows the federal tax important date: returns are due April 15 (or the next business day if the 15th falls on a weekend). You can file electronically through the Franchise Tax Board website, through tax software, or by mail using paper forms. Electronic filing is faster and reduces errors.

If you cannot file by the important date, you can request an extension, but this only extends the filing important date — not the payment important date. If you owe tax, you should pay by April 15 to avoid penalties and interest, even if you file late.

You will need your Social Security number, W-2 forms from employers, 1099 forms for self-employment or investment income, and records of any deductions you plan to claim. If you had taxes withheld from paychecks, you will need to know how much was withheld to calculate whether you are owed a refund.

Frequently Asked Questions

Does California tax retirement income?

Social Security is not taxed by California. Distributions from traditional IRAs and 401(k)s are taxed as ordinary income. Roth IRA withdrawals are generally not taxed. Pension income from government or military service may have special exemptions — check the Franchise Tax Board rules for your specific situation.

What happens if I move out of California?

You file a part-year return for the year you move, reporting income only for the months you lived in California. Once you establish residency in another state, you no longer owe California tax on income earned after you leave, though you may owe tax to your new state. Keep documentation of when you moved.

Can I deduct federal taxes paid from my California return?

No. California does not allow you to deduct federal income tax, federal self-employment tax, or federal payroll taxes. You can deduct state income tax paid in previous years if you itemize deductions, but not federal tax.

What if I did not have taxes withheld from my income?

You may owe tax when you file. If you are self-employed or have income without withholding, you can make estimated tax payments quarterly to avoid a large bill at tax time. The Franchise Tax Board provides a worksheet to calculate estimated payments.

Is there a penalty for filing late?

Yes. If you file late and owe tax, you face a failure-to-file penalty and a failure-to-pay penalty plus interest. The penalties are calculated as a percentage of the unpaid tax. Filing even a few days late can trigger these penalties, so file as soon as you can.