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

California taxes income earned within the state at rates ranging from 1% to 13.3%, depending on how much you earn. Unlike some states that have no income tax at all, California funds its schools, infrastructure, and social programs partly through this tax. If you live in California or earn money there, you will owe state income tax on most types of income — wages, self-employment earnings, investment gains, and retirement distributions all count.

The state uses a progressive tax system, meaning the rate you pay increases as your income rises. A single filer earning $10,000 pays a much lower percentage than one earning $500,000. California also allows you to claim deductions and credits that can lower your taxable income, similar to the federal system but with some differences in what qualifies.

Key Takeaways

  • California's state income tax rates range from 1% to 13.3%, with the highest rate explore only to income over $680,000 for single filers in 2024.
  • You owe California state tax on wages, self-employment income, capital gains, retirement account withdrawals, and most other income sources if you live or work in the state.
  • California allows you to deduct federal income tax paid, mortgage interest, charitable donations, and certain other expenses, which reduces your taxable income.
  • If you move out of California, you may still owe tax on income earned while you were a resident, and the state has specific rules about when residency ends.

How California's tax brackets work

California divides income into brackets, and you pay the stated rate only on income that falls within that bracket. For 2024, a single filer pays 1% on the first $10,099 of taxable income, then 2% on income between $10,099 and $23,942, and so on, with rates stepping up to 13.3% on income over $680,063. The brackets adjust each year for inflation, so the dollar amounts change annually.

The key point is that moving into a higher bracket does not mean all your income is taxed at that rate. If you earn $50,000, you do not pay 6% on everything — you pay 1% on the first portion, 2% on the next portion, and so on until you reach $50,000. This is why your effective tax rate (the average rate you pay on all income) is always lower than your marginal tax rate (the rate on your last dollar earned).

California also imposes a 1% Mental Health Tax on income over $1 million, which applies on top of the regular brackets. This tax was added in 2021 and affects high earners specifically.

What income is subject to California state tax

California taxes most types of income, but the rules differ slightly depending on the source. Wages and salaries are fully taxable. Self-employment income is taxable, though you can deduct half of your self-employment tax (the Social Security and Medicare portion you pay). Interest and dividends are taxable. Capital gains — profit from selling stocks, real estate, or other assets — are taxed as ordinary income, not at a special rate like the federal system.

Retirement account distributions are taxable when you withdraw them, with some exceptions. Traditional IRA and 401(k) withdrawals are fully taxable. Roth IRA withdrawals are not taxable if you meet certain conditions. Social Security benefits may be partially taxable depending on your total income. Unemployment benefits are taxable. Gambling winnings are taxable.

Some income is not taxable in California. Municipal bond interest is exempt. Certain disability benefits are exempt. Workers' compensation is exempt. Some scholarships and grants are exempt if used for tuition and fees. If you are unsure whether a specific income source is taxable, the California Franchise Tax Board (FTB) website lists detailed rules for each type.

Deductions and credits that lower your California tax bill

California allows you to claim a standard deduction or itemize deductions, similar to federal tax filing. For 2024, the standard deduction is $5,202 for single filers and $10,404 for married filers filing jointly. If your deductions exceed the standard amount, you can itemize instead. California allows deductions for federal income tax paid, state and local property taxes (up to $10,000 combined with state income tax), mortgage interest, charitable donations, and certain other expenses.

California also offers tax credits that directly reduce the amount of tax you owe. 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 helps offset childcare costs. The Renter's Credit provides relief to renters with low income. The Golden State Earned Income Tax Credit (CalEITC) is California's version of the federal EITC and is more generous for some filers. Unlike deductions, which reduce your taxable income, credits reduce your tax dollar-for-dollar.

How to file California state income tax

You file California state income tax using Form 540 (the long form) or Form 540-2EZ (the short form for straightforward returns). You can file on paper by mailing the form to the FTB, or you can file electronically through the FTB website or through tax software. Many tax software providers include California state filing as part of their package, though some charge extra for state returns.

The important date to file is typically April 15, the same as the federal important date. If you cannot file by then, you can request an extension, which gives you until October 15. An extension to file is not an extension to pay — if you owe tax, you should pay by April 15 to avoid penalties and interest, even if you file late.

If you are a resident of California, you must file a state return if your income exceeds the filing threshold for your filing status. If you are a nonresident who earned income in California, you may also owe a return. The FTB website has a filing requirement calculator to help you determine whether you must file.

Residency rules and when you owe California tax

California taxes residents on all income, regardless of where it was earned. If you live in California, you owe tax on wages from a job in another state, investment income, rental income from property outside California, and any other income source. The state defines residency based on where you spend your time and where your permanent home is located.

If you move out of California, you stop owing state tax on income earned after you leave, but the state has specific rules about when residency officially ends. straightforward renting an apartment in another state does not end California residency if you still own a home in California or spend significant time there. The FTB looks at factors like where your spouse and dependents live, where you work, and where you maintain your permanent home. If you are planning to move, it is worth documenting your move carefully — keeping records of your new lease, utility bills, and driver's license change — because the FTB may challenge your claim that you are no longer a resident.

Nonresidents who earn income in California (such as someone who works remotely for a California company while living in another state) owe California tax only on that California-source income, not on income earned elsewhere.

Frequently Asked Questions

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

Yes, you owe California tax on the income you earn from that job, because the income is California-source. However, you also owe tax to the state where you live. Most states offer a credit for taxes paid to other states to prevent double taxation, so you will not pay the full rate to both, but you will owe something to each.

What happens if I do not file a California state return when I should have?

The FTB can assess penalties and interest on unpaid tax. The penalty for failing to file is typically 5% of the unpaid tax per month, up to 25%. Interest accrues daily at a rate set quarterly by the FTB. If you owe a large amount, the FTB can place a lien on your property or garnish your wages. If you realize you missed a year, you can file a late return, and the FTB may reduce penalties if you have a reasonable cause.

Can I deduct state income tax paid to California on my federal return?

Yes, but only if you itemize deductions on your federal return. You can deduct up to $10,000 of state and local taxes combined (including income tax, property tax, and sales tax). Most filers use the standard deduction instead, which means they do not benefit from this deduction.

Is Social Security taxable in California?

No, Social Security benefits are not taxable in California, even if they are taxable on your federal return. This is one area where California is more generous than the federal system. You do not need to report Social Security income on your California return.

What is the difference between California's capital gains tax and the federal capital gains tax?

California taxes capital gains as ordinary income at your regular tax rate, which can be as high as 13.3%. The federal government taxes long-term capital gains at preferential rates (0%, 15%, or 20% depending on income). This means selling an appreciated asset in California can result in a much higher state tax bill than the federal tax on the same gain.