California taxes income, and the rates are higher than the federal standard

Yes, California has a state income tax. It applies to wages, self-employment income, investment gains, and other earnings. The state tax rate ranges from 1% to 13.3% depending on your income level — California uses a progressive tax system, meaning higher earners pay a higher percentage. This is separate from federal income tax, so you owe both.

California also taxes capital gains (profits from selling stocks, real estate, or other assets), though there are some special rules. Long-term capital gains — assets held for more than a year — are taxed at the same rates as ordinary income in California, unlike the federal system which has lower capital gains rates. Short-term gains are taxed as regular income.

The state also collects sales tax (which varies by county, typically 7.25% to 10.5%), property tax on real estate, and excise taxes on fuel and other goods. This guide focuses on state income tax, which is what most people encounter first.

Key Takeaways

  • California's state income tax ranges from 1% to 13.3% based on your income bracket, and you owe it in addition to federal income tax.
  • The state taxes both ordinary income and capital gains at the same rates, with no preferential rate for long-term investment profits like the federal system offers.
  • You file California taxes using Form 540 (or 540-2EZ for simpler returns) and must report all income earned in the state, even if you lived there only part of the year.
  • California allows deductions for federal taxes paid, mortgage interest, charitable donations, and other expenses, which can lower your taxable income.
  • If you move out of California, you may still owe state tax on income earned while you lived there, and the state has specific rules about when you are considered a resident.

How California's income tax brackets work

California uses tax brackets that change each year based on inflation. For the 2024 tax year, a single filer with $20,000 in taxable income pays 1% on the first $10,099, then 2% on income between $10,099 and $23,942. As income rises, the rate increases at each bracket until reaching 13.3% on income over $680,063.

The brackets are different for married couples filing jointly, heads of household, and married filing separately. A married couple with the same total income as a single filer will typically owe less tax because the brackets are wider. You can find the current-year brackets on the California Department of Tax and Fee Administration (CDTFA) website or on the Franchise Tax Board (FTB) website — the FTB handles income tax specifically.

Your marginal rate (the rate on your last dollar earned) is not the same as your effective rate (the average rate on all your income). If you earn $50,000, you do not pay 9.3% on all of it — you pay 1% on the first portion, 2% on the next, and so on. Understanding this difference matters when deciding whether to take on extra income or make charitable donations.

What income California taxes and what it does not

California taxes W-2 wages, self-employment income, rental income, interest, dividends, and capital gains. If you worked in California during the year, even for part of it, you owe state tax on that income. If you are a California resident, you also owe tax on income earned outside the state — the state taxes based on residency, not just where the work happened.

Some income is exempt. Social Security benefits are not taxed by California (though they may be taxed federally). Certain retirement distributions, disability benefits, and workers' compensation are also exempt. Municipal bond interest is not taxed by California or the federal government. If you received a Roth IRA distribution of contributions (not earnings), that is not taxable.

The state does not tax income earned by nonresidents who worked in California but did not live there. However, determining residency can be complex — California looks at where you spent most of the year, where your family lives, where you own property, and where you have a driver's license or vehicle registration. If you moved to another state mid-year, you may need to file as a part-year resident.

Filing requirements and important date

You must file a California state return if you owe state income tax or if you had California income tax withheld from your paychecks. Even if you do not owe tax, filing may be worth it — you might be due a refund if too much was withheld. The important date is the same as the federal important date: April 15 of the following year (or the next business day if April 15 falls on a weekend or holiday).

Most people file using Form 540 (the full return) or Form 540-2EZ (a simplified version for people with straightforward tax situations). You can file on paper by mail or electronically through the FTB website or through tax software. If you file electronically, you typically get a refund faster — usually within 2 to 4 weeks if you chose direct deposit.

If you cannot file by April 15, 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 even if you file late, or you will owe penalties and interest. The extension gives you until October 15 to submit your return.

Deductions and credits that lower your California tax bill

California allows you to deduct federal income tax paid during the year, which is a significant deduction for many filers. You can also deduct state income tax, property tax, sales tax (you choose one), mortgage interest, charitable donations, and certain business expenses if you are self-employed. These deductions reduce your taxable income, which lowers the tax you owe.

The state also offers tax credits, which directly reduce the tax you owe rather than reducing your income. 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 Child and Dependent Care Credit, the Dependent Parent Credit, and credits for taxes paid to other states are also available depending on your situation.

California has a standard deduction (like the federal system) or you can itemize deductions if they total more than the standard amount. For 2024, the standard deduction is $4,783 for single filers and $9,566 for married couples filing jointly. If your deductions are close to the standard amount, it may be worth calculating both ways to see which saves more tax.

What happens if you move out of California

If you moved out of California during the year, you file as a part-year resident and owe tax only on income earned while you lived in the state. You will need to report the date you moved and show proof — a lease, utility bill, or driver's license with the new address typically works. Income earned after you moved is not subject to California tax (though it may be subject to your new state's tax).

California considers you a resident if you spent more than nine months in the state during the year, even if you intended to move. The state also looks at where your family lives, where you own property, and where you have a driver's license. If you are borderline, document your time outside the state carefully — keep receipts, lease agreements, and records of where you stayed.

If you left California and the state believes you are still a resident, you can file a Resident Return Form (Form 540-NR) to claim part-year resident status. This is not a dispute — it is straightforward the correct form to use. If the FTB disagrees with your residency claim, they may audit you, so keep documentation of your move.

Self-employment income and estimated taxes

If you are self-employed, you owe California income tax on your net profit (revenue minus business expenses). You also owe self-employment tax to cover Social Security and Medicare, which is a federal obligation. California does not have a separate self-employment tax, but you must pay state income tax on your profit.

If you expect to owe more than $500 in California income tax for the year, you should make estimated tax payments quarterly — on April 15, June 15, September 15, and January 15. You can pay online through the FTB website or by mail. If you do not pay enough during the year, you will owe penalties and interest when you file, even if you ultimately pay all the tax owed.

To calculate your estimated payment, estimate your annual profit, subtract deductions, and use the tax tables to find what you owe. Divide that by four and pay that amount each quarter. If your income varies, you can pay more in high-income quarters and less in low ones. Many self-employed people overpay slightly to avoid penalties.

Frequently Asked Questions

Do I have to pay California state tax if I work remotely for a company outside the state?

If you are a California resident, yes — the state taxes income based on residency, not where your employer is located. If you worked remotely from California for an out-of-state company, you owe California tax on those wages. If you are not a resident but worked in California (even remotely), you owe tax only on the income earned while you were a resident.

What is the difference between California and federal tax brackets?

California has its own separate tax brackets and rates that are different from federal brackets. Your federal tax is calculated using federal brackets, and your California tax is calculated using California brackets. You owe both. The federal system has preferential rates for long-term capital gains (0%, 15%, or 20%), but California taxes all capital gains at ordinary income rates.

Can I deduct state income tax on my federal return?

Yes, you can deduct state income tax paid (or estimated to be paid) on your federal return, up to $10,000 per year. This is called the SALT deduction. On your California return, you deduct the federal income tax you paid, which is a separate deduction. The two deductions work in opposite directions to avoid double-taxation.

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

You should file as soon as possible. The FTB can assess tax going back four years, and penalties and interest accrue each year. If you are owed a refund, you have four years to claim it. Filing late is better than not filing — the penalty for filing late is smaller than the penalty for not filing at all.

Does California tax retirement income differently?

Social Security is not taxed by California. Distributions from traditional IRAs and 401(k)s are taxed as ordinary income. Roth IRA distributions of contributions (not earnings) are not taxed. Military pensions and some other government pensions have special exemptions. Pension income from private employers is taxed as ordinary income unless it qualifies for a specific exemption.