California Capital Gains Tax Calculator
California taxes capital gains as ordinary income at the state level, which means a gain on selling shares, property or other investments is added to your other income and taxed using the California income tax brackets, with no separate preferential long-term rate like the federal system provides. This calculator estimates the California state tax on a capital gain by stacking the gain on top of your other taxable income and applying the sourced California Franchise Tax Board brackets for tax year 2025, then taking the difference. Enter your gain, your other annual taxable income and your filing status to see the state tax attributable to the gain and the effective rate on it. The result is the California state portion only; federal capital gains tax, which has separate short-term and long-term rates set by the IRS, is calculated separately. Because the gain stacks on your other income, the same gain is taxed at a higher rate the more you already earn. Some states provide specific exclusions or preferential treatment for certain gains; this tool uses the standard ordinary-income method and links the California Franchise Tax Board so you can confirm any special rule that applies to you.
California taxes capital gains as ordinary income. A $20,000.00 gain on top of $60,000.00 of other income (single) adds about $1,555.45 in California state tax, an effective rate on the gain of 7.78%.
How California taxes capital gains
California taxes capital gains as ordinary income, so the gain is added to your other income and taxed at the California bracket rates.
state tax on gain = state income tax on (other income + gain) - state income tax on (other income)
effective rate on gain = state tax on gain / gain x 100
California capital gains tax: frequently asked questions
How are capital gains taxed in California?
California taxes capital gains as ordinary income at the state level: the gain is added to your other taxable income and taxed using the California income tax brackets published by the California Franchise Tax Board. This calculator applies those brackets to your gain. Some states provide specific exclusions or rates for particular gains; confirm your situation with the California Franchise Tax Board.
How much state tax will I pay on a $20,000.00 capital gain in California?
Stacked on $60,000.00 of other income, a $20,000.00 gain adds about $1,555.45 of California state income tax for a single filer, an effective rate on the gain of 7.78%. Your figure depends on your total income and filing status; enter them above.
Does California have a separate long-term capital gains rate?
Most states, including the default treatment here, tax long-term and short-term capital gains at the same ordinary income rates, unlike the federal system which has preferential long-term rates. Any state-specific exclusion or preferential rate is set by the California Franchise Tax Board; this calculator uses the ordinary income method and links the source.
What is California's top income tax rate?
California's top marginal rate is 13.3% (12.3% plus the 1% Mental Health Services Tax surcharge on income above $1,000,000), making it the highest state income tax rate in the United States. Source: 2025 California 540 Tax Rate Schedules, FTB.
What is the standard deduction in California for 2025?
For 2025, California's standard deduction is $5,706 for single filers and married filing separately, and $11,412 for married filing jointly, qualifying surviving spouse, or head of household. Source: 2025 Form 540 Booklet, FTB.
Does California tax Social Security benefits?
No. California does not tax Social Security benefits at the state level. However, you may still owe federal income tax on a portion of your Social Security income. Source: FTB Publication 1005.
What is California's SDI rate for 2025?
California's State Disability Insurance (SDI) withholding rate is 1.1% of all wages with no wage cap for 2025. SDI is a separate payroll withholding and does not factor into the income tax bracket calculation. Source: California Employment Development Department.
Official sources
- California income tax rates applied to capital gains (tax year 2025): California Franchise Tax Board, as at Jun 12, 2026.
Reviewed by the CalculatorHub team, edited by James Graham, 25 June 2026. See our methodology. General information, not financial or tax advice. State-specific exclusions, if any, are set by the California Franchise Tax Board.