California taxes your income at rates between 1% and 13.3%, depending on how much you earn

California has a progressive income tax system, meaning the tax rate increases as your income increases. You do not pay the highest rate on all your money — you pay different rates on different portions of your income, moving up through tax brackets as you earn more. The lowest bracket starts at 1% for single filers earning under $10,000 per year. The highest bracket, 13.3%, applies only to income above $680,000 for single filers (the threshold varies for married couples and other filing statuses).

California taxes all income you receive during the year: wages from a job, self-employment income, rental income, investment gains, and retirement distributions. If you live in California or work there, you owe California income tax on that money. The state also taxes income from out-of-state sources if you are a resident.

You file your California return using Form 540 (or Form 540-2EZ if your situation is simple). The deadline is the same as the federal deadline: April 15 of the following year, unless you request an extension. If you owe money, you pay the California Franchise Tax Board directly. If you overpaid through withholding, you receive a refund.

Key Takeaways

  • California income tax rates range from 1% to 13.3% depending on your income level and filing status.
  • You pay tax on all income — wages, self-employment, rental, investment gains, and retirement distributions — if you live or work in California.
  • You file Form 540 with the California Franchise Tax Board by April 15 each year, or request an extension.
  • If your employer withholds taxes from your paycheck, you may receive a refund if too much was withheld, or owe additional tax if too little was withheld.

How tax brackets work in California

California divides income into brackets, and you pay a different rate on income within each bracket. For example, if you are a single filer in 2024, you pay 1% on income from $0 to $10,000, then 2% on income from $10,001 to $23,942, then 4% on income from $23,943 to $37,788, and so on. You do not jump to the highest rate all at once — only the income that falls into each bracket is taxed at that rate.

The brackets adjust every year for inflation, so the dollar amounts change annually. The California Franchise Tax Board publishes the current year's brackets on its website before tax season begins. Your filing status matters: single filers, married couples filing jointly, heads of household, and married couples filing separately all have different bracket ranges.

To find your tax, you locate your income level, find the bracket it falls into, and calculate the tax owed on each portion. Many people use tax software or a tax preparer to do this automatically, but you can also calculate it by hand using the tax tables the state provides.

What income counts and what does not

California taxes most types of income. This includes wages and salaries, tips, bonuses, self-employment income (if you run a business or freelance), rental income, capital gains from selling stocks or property, interest and dividends, retirement distributions from IRAs and 401(k)s, and unemployment benefits. If you received money during the year, California likely wants to know about it.

Some income is exempt from California tax. Federal Social Security benefits are not taxed by California (though they may be taxed federally). Certain disability benefits, workers' compensation, and some military benefits are also exempt. Gifts and inheritances do not count as income. Money you borrowed does not count as income either.

If you are unsure whether a specific type of income is taxable, the California Franchise Tax Board publishes a guide on its website, or you can speak with a tax preparer. The key rule: if you earned it or received it as payment for something, it is probably taxable.

Withholding and how much comes out of your paycheck

If you work as an employee, your employer withholds California income tax from each paycheck based on a form you fill out called a W-4. The W-4 tells your employer how much to withhold — the more dependents or deductions you claim, the less is withheld. The less you claim, the more is withheld.

The goal of withholding is to pay in roughly the amount of tax you will owe by the end of the year. If your withholding is too high, you overpay and receive a refund. If it is too low, you owe money when you file. You can adjust your withholding at any time by submitting a new W-4 to your employer, which is useful if your life circumstances change — you get married, have a child, take a second job, or have a major change in income.

If you are self-employed, you do not have an employer to withhold for you. Instead, you make estimated tax payments four times per year (quarterly) to the California Franchise Tax Board. These payments are due in April, June, September, and January. If you do not pay enough in estimated taxes, you may owe a penalty when you file your annual return.

Deductions and credits that lower your tax

California allows you to reduce your taxable income using deductions. You can choose between the standard deduction (a flat amount based on your filing status) or itemized deductions (adding up specific expenses like mortgage interest, property taxes, and charitable donations). Most people use the standard deduction because it is simpler and often results in a lower tax.

California also offers tax credits, which directly reduce the tax you owe rather than reducing your income. The Earned Income Tax Credit (EITC) is a major credit for lower-income workers. The Child and Dependent Care Credit helps people who pay for childcare. The Renter's Credit provides money back to renters with low income. Unlike deductions, credits reduce your actual tax dollar-for-dollar, making them more valuable.

To claim deductions and credits, you list them on your Form 540 when you file. Tax software typically walks you through questions to determine which ones you can claim. If you are unsure, a tax preparer or the California Franchise Tax Board's website can help you understand which deductions and credits apply to your situation.

Filing your California return and paying what you owe

You file your California return by April 15 each year using Form 540 (or Form 540-2EZ if you have simple income). You can file by mail, electronically through tax software, or through a tax preparer. Electronic filing is faster and reduces errors. If you cannot file by April 15, you can request an extension, which gives you until October 15 to file — but note that an extension to file is not an extension to pay, so you should still pay any tax you owe by April 15 to avoid penalties and interest.

If you owe California income tax, you pay the California Franchise Tax Board. You can pay online through their website, by mail, by phone, or through your tax software. If you are receiving a refund, the state processes it and sends it to you by mail or direct deposit, typically within a few weeks of filing.

If you do not file or pay on time, the state charges penalties and interest. The failure-to-file penalty is 5% per month (up to 25%) of the unpaid tax. The failure-to-pay penalty is 0.5% per month (up to 25%) of the unpaid tax. Interest accrues daily at a rate set by the state. If you owe and cannot pay in full, you can set up a payment plan with the Franchise Tax Board.

Frequently Asked Questions

Do I have to file a California return if I live out of state?

No, unless you worked in California during the year. If you lived out of state the entire year and earned no California income, you do not file a California return. However, if you worked in California even part of the year, you must file and pay tax on that income, even if you now live elsewhere.

What happens if I move to California mid-year?

You are a California resident for the portion of the year you lived there, and you owe California tax on all income you earned while a resident. You file a California return reporting your income for the months you lived in the state. You may also owe tax to your previous state for the months you lived there. Both states will want a return, but you typically receive a credit on one return for taxes paid to the other.

Can I deduct federal income tax from my California taxes?

No. California does not allow you to deduct federal income tax paid. However, you can deduct state income tax paid on your federal return. The two tax systems are separate, and each has its own rules about what is deductible.

What if I disagree with my tax bill?

You can file a protest with the California Franchise Tax Board within a set timeframe (usually within 30 days of receiving a notice). You must provide documentation supporting your position. If you and the state cannot agree, you can request a hearing or pursue other dispute resolution options. The Franchise Tax Board website has instructions for filing a protest.

Is there a penalty if I file late but pay on time?

Yes. The failure-to-file penalty applies even if you pay by April 15. You should file by the deadline to avoid this penalty. If you cannot file on time, request an extension before April 15 to avoid the penalty.