California Income Tax Calculator (2025)
Enter your gross income and filing status to see your estimated California state income tax for tax year 2025 (returns due April 2026). The calculator applies the nine progressive CA brackets, the 1% Mental Health Services Act surtax on income above $1 million, the California standard deduction, exemption credits, and the 1.2% SDI payroll deduction. Your effective rate, marginal rate, and estimated take-home update instantly as you type.
How California income tax is calculated
California taxes resident income through nine progressive brackets ranging from 1% to 12.3%, plus a 1% Mental Health Services Act (MHSA) surtax on income above $1 million, giving an effective top rate of 13.3%. The calculation follows four steps. First, subtract any pre-tax retirement contributions (traditional 401(k) or deductible IRA) from gross income to arrive at Adjusted Gross Income (AGI). Second, subtract the California standard deduction: $5,706 for single filers and $11,412 for joint filers and heads of household. Third, apply the progressive rate schedule to the resulting taxable income to get a gross bracket tax. Fourth, reduce that number by your nonrefundable exemption credits: $144 per filer (plus an extra $144 each for being 65 or older or legally blind) and $475 per qualifying dependent. The result is your California income tax liability.
SDI: California State Disability Insurance
In addition to the income tax, employees pay California State Disability Insurance (SDI) at 1.2% of gross wages for 2025. Since Senate Bill 951 took effect in January 2024, there is no taxable wage cap, so SDI applies to every dollar you earn. For a worker earning $85,000 that means $1,020 in SDI for the year. SDI funds short-term disability and paid family leave benefits administered by the California Employment Development Department (EDD). Note that the SDI rate is set annually: it was 0.9% in 2023, 1.1% in 2024, and is 1.2% for 2025.
Standard deduction versus itemizing
California allows its own standard deduction that is separate from, and much smaller than, the federal amount: $5,706 for single filers and $11,412 for joint filers and heads of household in 2025. Because California does not conform to the federal standard deduction, many taxpayers who take the standard deduction on their federal return may still benefit from itemizing on their California return. State and local taxes paid to other states, mortgage interest, casualty losses, and charitable contributions can all count toward a California itemized deduction. This calculator uses the standard deduction as the default; if you plan to itemize, replace the standard deduction amount with your total California itemized deductions to get a more accurate estimate.
Exemption credits and dependents
California provides nonrefundable exemption credits that reduce your tax dollar-for-dollar, rather than deductions that only reduce taxable income. For 2025 these are: $144 personal credit per filer (so $288 for a joint return), an extra $144 if you or your spouse are 65 or older by December 31, an extra $144 per person if legally blind, and $475 per qualifying dependent child or relative. These credits phase out for higher-income taxpayers: the phase-out begins at $200,000 adjusted gross income for single filers and $400,000 for joint filers, reducing the credits by 6% of AGI above those thresholds. This calculator does not apply the high-income phase-out, so results for very high incomes may be slightly understated on the credit side.
California 2025 Income Tax Brackets - Single Filers
| Taxable Income | Rate | Tax on This Band |
|---|---|---|
| $0 - $11,079 | 1.0% | Up to $111 |
| $11,080 - $26,264 | 2.0% | Up to $304 |
| $26,265 - $41,452 | 4.0% | Up to $608 |
| $41,453 - $57,542 | 6.0% | Up to $966 |
| $57,543 - $72,724 | 8.0% | Up to $1,215 |
| $72,725 - $371,479 | 9.3% | Up to $27,788 |
| $371,480 - $445,771 | 10.3% | Up to $7,653 |
| $445,772 - $742,953 | 11.3% | Up to $33,576 |
| $742,954+ | 12.3% | 12.3% on each dollar |
| Over $1,000,000 | +1.0% | MHSA surtax (cumulative 13.3%) |
Progressive rates for single filers. Married Filing Jointly limits are approximately doubled; Head of Household uses slightly higher lower brackets.
Frequently asked questions
What is the top California income tax rate for 2025?
The top standard rate is 12.3%, which applies to taxable income above $742,953 for single filers and $1,485,906 for married filing jointly. If your taxable income exceeds $1 million, an additional 1% Mental Health Services Act (MHSA) surtax applies, bringing the effective top rate to 13.3%. This makes California's top income tax rate one of the highest of any U.S. state.
Is California SDI the same as income tax?
No. California State Disability Insurance (SDI) is a separate payroll deduction from the income tax. For 2025 it is 1.2% of all gross wages with no wage cap. It funds short-term disability pay and paid family leave through the EDD. Unlike income tax, it is not progressive: the same flat rate applies regardless of how much you earn.
How does California's standard deduction compare to the federal one?
California's standard deduction is much lower than the federal amount. For 2025, single filers can deduct $5,706 at the state level versus $15,000 federally; joint filers get $11,412 in California versus $30,000 federally. The gap means your California taxable income is often significantly higher than your federal taxable income, even if you take the standard deduction on both returns.
Does California tax capital gains as ordinary income?
Yes. California does not have a preferential rate for long-term capital gains. All capital gains, whether short-term or long-term, are taxed as ordinary income at the same progressive rates as wages. This is a significant difference from federal law, where long-term gains are taxed at 0%, 15%, or 20% depending on income.
Can I reduce my California taxable income with a 401(k) contribution?
Yes, to some extent. Traditional 401(k) and deductible IRA contributions reduce your federal AGI, and California uses your federal AGI as the starting point for the state return. So pre-tax retirement contributions lower your California taxable income before the standard deduction is applied. Roth contributions do not reduce AGI and therefore do not lower your CA tax.
Are Social Security benefits taxed in California?
No. California is one of the few states that fully exempts Social Security benefits from state income tax, regardless of your income level. This is an advantage over the federal system, which taxes up to 85% of Social Security benefits for higher earners.