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

California taxes income earned by residents and part-year residents at rates ranging from 1% to 13.3%, depending on your income level. The state uses a progressive tax system, meaning higher earners pay a higher percentage. Unlike some states, California taxes wages, investment income, retirement distributions, and other forms of income. If you work in California but live elsewhere, you may owe California tax on wages earned in the state.

The 13.3% rate is the top marginal rate and applies to the highest income bracket. However, most Californians pay less because only income above a certain threshold is taxed at that rate. The state also imposes an additional 1% tax on income over $1 million, which was originally temporary but has been extended multiple times.

Key Takeaways

  • California's income tax ranges from 1% to 13.3% depending on your income, making it one of the highest state rates in the nation.
  • The tax is progressive, so only income within each bracket is taxed at that bracket's rate, not your entire income.
  • You owe California tax if you are a resident, a part-year resident, or if you earned income within the state regardless of where you live.
  • California taxes retirement account withdrawals, investment gains, and other income sources the same way it taxes wages.
  • You file California taxes using Form 540 or 540-2EZ, and the important date matches the federal important date unless you request an extension.

How California's tax brackets work

California divides taxable income into brackets, and the rate for each bracket applies only to income that falls within it. For example, if you are single and earn $75,000, you do not pay 9.3% on all of it—you pay 1% on the first portion, then 2% on the next portion, and so on until you reach the top of your income. Only the dollars in the highest bracket you reach are taxed at that bracket's rate.

The brackets themselves change each year because California adjusts them for inflation. The 2024 brackets for single filers start at 1% on income up to roughly $10,000, then step up through 2%, 4%, 6%, 8%, 9.3%, 10.3%, 11.3%, 12.3%, and finally 13.3% on income over roughly $680,000. Married couples filing jointly have higher thresholds for each bracket. Head of household and married filing separately filers have their own bracket structures.

The additional 1% tax on income over $1 million applies on top of the regular brackets. This means high earners can face a combined marginal rate of 13.3% plus 1%, or 14.3%, on income above that threshold.

Who must file California taxes

You must file a California return if you are a resident, a part-year resident, or a nonresident who earned income in California. A resident is someone who lives in California or maintains a permanent home there. A part-year resident is someone who moved into or out of California during the tax year. A nonresident is someone who lives outside California but earned wages, self-employment income, or other income within the state.

The income threshold for filing also depends on your age and filing status. Generally, you must file if your income exceeds the standard deduction for your situation. For 2024, the standard deduction for a single person under 65 is roughly $5,200, but this amount changes yearly. If you are 65 or older, the threshold is higher. Even if you do not meet the income threshold, filing may be worth it if you are owed a refund or if you want to claim the California Earned Income Tax Credit.

If you are a nonresident, you file the same Form 540 as residents but report only the income you earned in California. You will need to allocate income between California and your home state if you worked in both places during the year.

Retirement income and investment income in California

California taxes most retirement distributions as ordinary income. Withdrawals from traditional IRAs, 401(k)s, and similar accounts are taxed at your regular rate. However, Social Security benefits are not taxed by California, which is a significant advantage for retirees. Military pensions are also exempt from California tax.

Investment income—capital gains, dividends, and interest—is taxed as ordinary income in California. If you sell an investment at a profit, the gain is added to your other income and taxed at your marginal rate. Long-term capital gains (gains on assets held over one year) receive no special rate reduction in California, unlike federal tax. This means a long-term gain is taxed the same way as short-term gains or wages.

If you have significant investment income, consider the timing of sales and distributions. Bunching gains into a single year may push you into a higher bracket, while spreading them across years may lower your overall tax. This is one area where working with a tax professional can pay off.

How to file your California return

You file California taxes using Form 540 (the full return) or Form 540-2EZ (a simplified version for lower-income filers). The 540-2EZ is available if your income is below a certain threshold (roughly $13,000 for 2024) and you meet other requirements. Most filers use the full Form 540.

You can file by mail, online through the California Franchise Tax Board website, or through tax software that supports California returns. The important date is the same as the federal important date—normally April 15—unless you request an extension. If you request a federal extension, you automatically receive a California extension as well, giving you until October 15 to file.

You will need your Social Security number or ITIN, your W-2 forms or 1099 forms showing income, records of any estimated tax payments you made, and documentation of deductions or credits you plan to claim. If you are self-employed, you will also need Schedule C (or Schedule F if you are a farmer) to report business income and expenses.

Deductions and credits available in California

California allows you to claim either the standard deduction or itemize deductions, just like federal tax. The standard deduction for 2024 is roughly $5,200 for single filers under 65, with higher amounts for those 65 and older and for married couples. If you itemize, you can deduct state and local taxes (SALT), mortgage interest, charitable contributions, and other may have access to expenses, subject to limitations.

California also offers several credits that directly reduce your tax. The California Earned Income Tax Credit (CalEITC) is available to low- and moderate-income workers and can result in a refund even if you owe no tax. The Young Child Tax Credit provides up to $1,000 per child under six. The Dependent Parent Tax Credit and other credits may also explore depending on your situation.

Unlike federal tax, California does not conform to all federal deductions and credits. For example, California does not allow the federal deduction for student loan interest. Always check whether a federal deduction or credit is also available under California law, because the rules differ.

Tax planning strategies for California residents

Because California's top rate is high, timing of income and deductions can matter. If you are self-employed or have control over when you receive income, deferring income to a lower-income year can reduce your tax. Conversely, if you expect to be in a higher bracket next year, accelerating income into the current year may be beneficial.

Bunching deductions is another strategy. If you are close to itemizing, you might accelerate charitable contributions or property tax payments into a single year to exceed the standard deduction, then take the standard deduction in the following year. This works best if you have flexibility over the timing of these payments.

For investment income, tax-loss harvesting—selling investments at a loss to offset gains—can reduce your taxable income. Because California taxes long-term gains at ordinary rates, this strategy is particularly valuable. However, the wash-sale rule prevents you from buying the same or substantially identical investment within 30 days of the sale, so plan accordingly.

If you are considering moving out of California, understand that the state taxes residents on worldwide income. Once you establish residency elsewhere, you stop owing California tax on new income, but the timing of your move and the documentation you maintain matter. Consult a tax professional before relocating if you have significant income or assets.

Frequently Asked Questions

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

No, if you are a resident of another state and work remotely, you owe tax only to your home state, not to California. However, if you worked in California in person during part of the year before moving, you may owe California tax on income earned while you were physically present in the state. The key is where you performed the work, not where the company is located.

Is Social Security taxed in California?

No, California does not tax Social Security benefits. This is one of the few income sources that receives preferential treatment. However, other retirement income such as IRA and 401(k) withdrawals are taxed as ordinary income.

What happens if I do not file a California return?

If you owe tax and do not file, the Franchise Tax Board can assess penalties and interest. If you are owed a refund, you have a limited time to claim it—generally four years. Filing even if you do not owe can protect your right to a refund and avoid penalties.

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

You can deduct California income tax as part of your state and local taxes (SALT) on your federal return, but only if you itemize deductions. The total SALT deduction is capped at $10,000 per year, which affects many California residents because state income tax alone often exceeds this limit.

How do I know if I am a California resident for tax purposes?

You are a California resident if you live in California or maintain a permanent home there. The Franchise Tax Board also considers factors like where you spend most of your time, where your family lives, and where you are registered to vote. If you are unsure, the FTB website provides guidance, or you can contact them directly.