California has a state income tax, and it applies to most people who work or live there

Yes, California charges state income tax. Unlike a handful of states that have no income tax at all, California taxes wages, self-employment income, investment gains, and other earnings. The tax rate varies depending on how much you earn — it ranges from 1% on the lowest incomes to 13.3% on the highest, making it one of the steepest state income tax rates in the country.

If you work in California or live there for more than part of a year, you almost certainly owe state income tax. Even if you live out of state but work in California, you may owe it. The state's Franchise Tax Board (FTB) administers the tax and handles returns, refunds, and enforcement.

Key Takeaways

  • California's state income tax rate ranges from 1% to 13.3% depending on your income level, with higher earners paying the top rate.
  • You owe California income tax if you live in the state for any part of the tax year or work there, even if you live elsewhere.
  • The Franchise Tax Board (FTB) is the state agency that collects income tax, processes returns, and issues refunds.
  • Tax brackets and rates change each year, so the amount you owe depends on your specific income and filing status in that year.

How California's tax brackets work

California uses a progressive tax system, meaning the rate increases as your income goes up. You do not pay the top rate on all your income — you pay different rates on different portions. For example, if you are single, the first portion of your income is taxed at 1%, the next portion at 2%, and so on, until you reach the highest bracket that applies to you.

The exact dollar amounts where each bracket begins and ends change every year because they are adjusted for inflation. A single filer in 2024 might pay 1% on income up to roughly $10,000, then 2% on income from $10,000 to $23,000, and so on. Married couples filing jointly have different bracket thresholds. The FTB publishes updated brackets each year on its website before tax season begins.

The top rate of 13.3% applies only to the highest earners — typically those making over $680,000 as a single filer, though this threshold shifts yearly. Most people pay rates between 1% and 9.3%.

Who has to file a California tax return

You must file a California return if you lived in the state for any part of the tax year and your income exceeds the filing threshold for your age and status. The threshold is lower than the federal threshold, so you might owe California tax even if you do not owe federal tax.

For 2024, a single person under 65 with income over roughly $20,000 must file. A married couple filing jointly with combined income over roughly $40,000 must file. These numbers change yearly. If you are 65 or older, the threshold is higher. Part-year residents — people who moved into or out of California during the year — must file if their income exceeds the threshold for the months they were in the state.

Even if your income is below the threshold, you should file if you had taxes withheld from your paycheck, because you may be owed a refund. Self-employed people generally must file if their net earnings are $400 or more.

Tax withholding from paychecks and estimated payments

If you work for an employer in California, your employer withholds state income tax from each paycheck based on a form you fill out — similar to federal withholding. The amount withheld depends on your income, filing status, and the number of dependents you claim. You can adjust your withholding by submitting a new form to your employer if you want more or less taken out.

If you are self-employed or have income that is not subject to withholding — such as rental income or investment gains — you may need to make estimated tax payments to California four times a year. These are payments you send directly to the FTB based on your expected annual income. Missing estimated payments can result in penalties and interest, even if you end up owing nothing when you file your return.

Deductions and credits that lower your California tax bill

California allows you to deduct certain expenses and claim credits that reduce the tax you owe. The standard deduction — a flat amount you can deduct if you do not itemize — varies by filing status and age. For 2024, a single filer under 65 can deduct roughly $4,700, while a married couple filing jointly can deduct roughly $9,400. These amounts increase each year.

You can also claim credits for things like dependent children, education expenses, and earned income if your income is low enough. Some credits are refundable, meaning if the credit is larger than the tax you owe, the state sends you the difference. Others are non-refundable, meaning they can only reduce your tax to zero. The California Earned Income Tax Credit (CalEITC), for example, is refundable and can result in a payment to you even if you owe no tax.

What happens if you do not pay or file

If you owe California income tax and do not pay, the FTB can assess penalties and interest on the unpaid amount. Penalties typically start at 5% of the unpaid tax and can reach 25% if the tax remains unpaid for a long time. Interest accrues daily at a rate set by the state, currently around 10% per year, though this changes quarterly.

If you do not file a return when you are required to, the FTB can file one on your behalf based on information from employers or other sources. This is called a substitute return, and it usually results in a higher tax bill because it does not include deductions or credits you could have claimed. The FTB can also place a lien on your property or garnish your wages to collect unpaid tax.

If you believe you cannot pay what you owe, the FTB offers payment plans and, in some cases, hardship relief. Contacting the FTB before the debt grows is usually the best approach.

Frequently Asked Questions

Do I owe California income tax if I moved out of state during the year?

You owe California income tax only for the months you lived in the state. If you moved out in June, you file as a part-year resident and owe tax only on income earned while you were there. You must report the date you left and your new state of residence on your return.

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

You owe California income tax on wages you earned in California, even if you live elsewhere. You may also owe tax to your home state on the same income, but most states offer a credit for taxes paid to other states to avoid double taxation. Check your home state's rules.

Can I deduct federal income tax from my California return?

No. California does not allow you to deduct federal income tax paid. However, you can deduct state and local taxes (SALT) up to $10,000 on your federal return if you itemize, which may offset some of the burden of paying both.

What is the difference between the standard deduction and itemized deductions?

The standard deduction is a flat amount everyone can deduct. Itemized deductions are specific expenses you list instead — like mortgage interest or charitable donations. You choose whichever gives you the larger deduction. Most people use the standard deduction because it is simpler and often larger.

Where do I file my California tax return?

You file with the Franchise Tax Board (FTB). You can file online through the FTB website, by mail, or through a tax preparer. The FTB also offers free filing for low-income residents through the CalFile program.