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 in addition to federal income tax. Unlike some states that have no income tax at all, California uses a progressive tax system, meaning the rate you pay increases as your income increases. The state also taxes capital gains, interest, dividends, and other forms of income, not just wages.

This means if you earn money in California or are a California resident, you will owe both federal tax to the IRS and state tax to the California Franchise Tax Board (FTB). These are separate taxes calculated on separate forms, and you cannot use one to cancel out the other.

Key Takeaways

  • California's state income tax rates range from 1% to 13.3% depending on your income level, with higher earners paying the top rate.
  • You owe California state tax if you are a resident or if you earned income in California, even if you live elsewhere.
  • Capital gains (profit from selling investments) are taxed as ordinary income in California, unlike the preferential federal rates that may explore.
  • The California Franchise Tax Board (FTB) administers state income tax, and you file using Form 540 or a shorter version depending on your situation.
  • State tax is separate from federal tax; you file both returns and pay both taxes unless you may have access to for a credit or deduction that reduces one of them.

How California's tax rates work

California uses tax brackets that change each year. Your income falls into a bracket, and you pay that percentage only on the income within that bracket, not on your entire income. For the 2024 tax year, rates start at 1% for the lowest earners and go up to 13.3% for the highest. The exact dollar amounts where each bracket begins and ends shift annually based on inflation.

The 13.3% rate applies only to high earners—it is not the rate everyone pays. A person earning $50,000 will pay a much lower effective rate than someone earning $500,000, because different portions of their income are taxed at different rates. This is why understanding which bracket you fall into matters: it tells you the rate applied to your last dollar of income, not your average rate across all income.

California also added a 1% tax on income over $25 million starting in 2023, which applies only to the wealthiest earners. This is separate from the regular brackets and is sometimes called the "millionaire's tax," though it applies to income, not net worth.

Who has to pay California state tax

You owe California state tax if you are a resident or if you earned income in the state, even if you do not live there. Residency is not just about where you have a home—it is about where you spend most of your time and where your financial and personal ties are strongest. If you moved to California during the year, you may be a part-year resident and owe tax only on income earned while you were a resident.

Non-residents who worked in California (for example, someone who lives in Nevada but worked a job in California) owe tax on the income they earned in the state. They file a California return reporting only that income, not income from other states or sources.

If you are unsure whether you are a resident, the FTB has a residency test on its website. The test looks at where you spent your time, where your family lives, where you own property, and where you have a driver's license or vehicle registration.

How capital gains are taxed differently in California than at the federal level

When you sell an investment like a stock or rental property for more than you paid for it, that profit is called a capital gain. At the federal level, long-term capital gains (assets held over one year) often get preferential rates—15% or 20% for most people, lower than ordinary income rates. California does not offer this break. Instead, California taxes all capital gains as ordinary income at your regular tax bracket rate, up to 13.3%.

This is a major difference. An investor in California with $100,000 in long-term capital gains might pay 15% federal tax but 13.3% California tax on the same gain, for a combined rate of about 28.3%. In a state with no income tax, that same investor would pay only the 15% federal rate. Over time, this difference compounds, especially for people who buy and sell investments frequently or who have large gains.

Short-term capital gains (assets held one year or less) are taxed as ordinary income at both the federal and state level, so California's treatment is consistent with federal law on that front.

Filing your California return and what forms you need

Most California residents file using Form 540, the full state income tax return. If your situation is straightforward—you have only wages, no dependents, and income below a certain threshold—you may use Form 540-2EZ, the shorter version. You can also file electronically through approved software or a tax professional.

You will need the same documents you gather for your federal return: W-2s from employers, 1099s for other income, receipts for deductions, and proof of any credits you claim. California allows many of the same deductions as the federal government, but some differ. For example, California does not allow a deduction for state income tax paid, while the federal government allows it (up to $10,000 combined with other state and local taxes).

The filing important date is the same as the federal important date: typically April 15, though it shifts if that date falls on a weekend or holiday. If you file your federal return late, your California return is also late, and penalties explore to both.

How California state tax interacts with federal tax

State and federal taxes are calculated separately, but they interact in ways that matter. If you pay state income tax, you can deduct it from your federal taxable income—but only up to $10,000 combined with property taxes and sales taxes (this is called the SALT cap). This means high-income Californians often hit this cap and cannot deduct all their state tax.

Some credits work on both returns. For example, the Earned Income Tax Credit (EITC) is available at both the federal and California level, and you can claim both. Other credits are state-only, like the California Child and Dependent Care Credit, which works alongside the federal version but is calculated separately.

If you owe both federal and state tax and cannot pay in full, you can set up a payment plan with each agency separately. The IRS and the FTB do not coordinate payment plans, so you may end up with two different monthly payments.

What happens if you move out of California

If you move out of California, you stop owing state tax on new income once you establish residency elsewhere. However, the FTB may challenge your claim that you left if you still own property, have family in the state, or maintain other ties. The state has been aggressive about pursuing people who claim to have moved but still have significant California connections.

If you move mid-year, you file as a part-year resident and owe tax only on income earned while you were a California resident. You will also owe tax to your new state on income earned after you moved there. Some states have reciprocal agreements that prevent double taxation, but California does not have many of these agreements, so you may owe tax to both states on income earned during your transition period.

Frequently Asked Questions

Do I have to pay California state tax if I work remotely for a California company but live in another state?

No, you owe tax to the state where you live and work, not where your employer is located. If you live and work in Nevada, you owe Nevada tax (or no state tax if Nevada has none) on your wages, even if your employer is in California. However, if you worked in California before moving, you may owe California tax on income earned during that period.

Can I deduct my federal income tax from my California state tax?

No. California does not allow you to deduct federal income tax paid. You can deduct state income tax from your federal return (up to the $10,000 SALT cap), but not the reverse. This is one reason California's effective tax rate can feel high—you are paying both without one reducing the other.

What is the difference between California's tax rate and my actual tax bill?

Your tax rate (the percentage in your bracket) is not the same as your effective tax rate (total tax divided by total income). Because California uses progressive brackets, your effective rate is lower than your marginal rate. For example, you might be in the 9.3% bracket, but your effective rate could be 6% if much of your income falls in lower brackets.

Do I owe California tax on unemployment benefits?

Yes, California taxes unemployment benefits as ordinary income. However, there is a federal exclusion that may reduce the amount you have to report. For 2024, you can exclude up to $10,200 of unemployment benefits from federal taxable income if your income is below certain thresholds, but California does not follow this exclusion, so you may still owe state tax on the full amount.

What if I did not file California taxes in previous years?

The FTB can assess back taxes for up to four years, and penalties and interest accrue on unpaid amounts. If you owe, contacting the FTB to set up a payment plan or discuss your situation is better than ignoring the debt. The agency can place a lien on property or garnish wages if you do not respond.