California Capital Gains Tax Calculator - Estimate California state tax on stock, crypto, and real estate gains before you file.
The California Capital Gains Tax Calculator estimates the California personal income tax owed on short- and long-term capital gains by adding the gain to your other income and applying California's 2024 brackets, including the 1% Mental Health Services surcharge above $1,000,000.
California Capital Gains Tax Calculator
Results
What Is California Capital Gains Tax Calculator?
The California Capital Gains Tax Calculator estimates the California state tax owed on profits from selling stocks, crypto, real estate, and other investments. California treats capital gains as ordinary personal income, so the estimate adds your gain to the rest of your California taxable income and applies the state's progressive brackets, including the 1% Mental Health Services surcharge above $1,000,000.
- • Selling stock or crypto: Estimate the California tax before you realize a brokerage or digital-asset gain.
- • Closing on real estate: See how a home or land sale changes your California return through the brackets.
- • Year-end tax planning: Check whether a gain pushes you into a higher marginal bracket.
- • Offsetting with losses: Model how capital losses reduce the amount California taxes.
California does not have a separate capital gains tax rate or a discounted long-term rate. Instead, gains are added to your California adjusted gross income and taxed under the same individual income tax schedule that applies to wages. The calculator separates short- and long-term buckets so the federal holding-period distinction stays visible, even though both are taxed the same at the state level.
This tool models California state tax only. It does not compute your federal capital gains tax, which follows separate federal rates and holding-period rules. Use it together with a federal estimate if you want the combined picture.
Because the federal side uses different rates, our federal capital gains tax calculator shows the separate IRS tax you will also owe on the same sale.
How California Capital Gains Tax Calculator Works
The calculator combines your gains and losses, places the result inside your California bracket, and isolates the tax attributable to the gain.
- Short-Term Gain: Profit on assets held one year or less, added to California income in full.
- Long-Term Gain: Profit on assets held more than one year; California taxes it the same as ordinary income.
- Capital Losses: Net losses that offset gains first, reducing the amount subject to tax.
- Other CA Taxable Income: Wages and other income that set which California bracket your gains fall into.
California uses a nine-bracket schedule from 1% to 13.3%, with a 1% Mental Health Services surcharge on taxable income above $1,000,000 that lifts the top effective rate to 14.3%. The California Capital Gains Tax Calculator applies these layers after netting gains and losses, so the result tracks the actual schedule rather than a single flat rate.
To isolate the tax on just your gains, the calculator computes California tax on your full income, then subtracts California tax on your other income alone. The difference is the California tax produced by the capital gain. This marginal approach reflects how California actually applies the schedule.
Single filer, $10,000 short-term and $30,000 long-term
Short-term gain $10,000, long-term gain $30,000, losses $3,000, other income $120,000, filing status single.
Net gain is $37,000. Combined California income is $157,000. California tax on $157,000 minus tax on $120,000 isolates the gain tax.
California tax on the gains is about $3,441, an effective rate near 9.3% on the gain.
The rate sits below the 13.3% top rate because the gain is stacked inside the middle brackets rather than taxed at the top.
According to the California Franchise Tax Board, California taxes capital gains as ordinary personal income with a top rate of 13.3% and a 1% Mental Health Services tax above $1,000,000 of taxable income.
According to IRS Publication 544, capital gains and losses are netted and the one-year holding period separates short-term from long-term treatment before state rules apply.
Real estate sales can also create an ongoing tax bill, so our California property tax calculator estimates the annual property side of ownership.
Key Concepts Explained
Four ideas explain why the California Capital Gains Tax Calculator looks different from a flat-percentage guess.
Ordinary income treatment
California adds capital gains to your regular income and taxes them at the same rates as wages, rather than using special capital gains rates.
No preferential long-term rate
Unlike the IRS, California does not give a lower rate for assets held more than one year; short- and long-term gains are taxed identically.
Marginal brackets
Your other income fills the low brackets first, so a gain may be split across the 1% through 13.3% layers.
Mental Health Services surcharge
A 1% surcharge on taxable income above $1,000,000 lifts the effective top rate on gains to 14.3% once you cross the line.
Investment income shares California treatment with dividends, so our dividend tax calculator covers the similar dividend side of the same brackets.
How to Use This Calculator
Gather your gain and income numbers, then run the estimate in six steps.
- 1 Pick filing status: Select single or married / RDP, matching the status on your California return.
- 2 Enter short-term gain: Add profit on assets held one year or less.
- 3 Enter long-term gain: Add profit on assets held more than one year, keeping the bucket separate for clarity.
- 4 Add losses and other income: Enter capital losses to offset gains and your other ordinary income to set the bracket.
- 5 Read the results: Review California tax on gains, the effective rate, and your marginal rate.
- 6 Adjust and compare: Change income or filing status to see how the marginal rate moves.
A single filer with $120,000 of wages, a $30,000 long-term stock gain, and $3,000 of capital losses would enter those figures and see about $3,441 of California tax on the gain, with an effective rate near 9.3%.
If the gain comes from selling digital assets, our crypto tax calculator handles the crypto-specific basis tracking at the federal level.
Benefits of Using This Calculator
The tool helps California residents plan around a rule that surprises many taxpayers.
- • Shows the state piece separately: It isolates the California tax so you are not mixing it with your federal bill.
- • Reveals marginal movement: You can see how a single sale shifts your marginal bracket.
- • Flags the surcharge: It warns you when a gain crosses the $1,000,000 Mental Health Services line.
- • Compares both buckets: Even though California taxes them the same, the short- and long-term split stays visible for federal purposes.
Because California brackets are progressive, the difference between a gain taxed inside the 9.3% layer versus the 13.3% layer can be thousands of dollars on a mid-size gain, which makes the estimate worth checking before you sell.
A capital gain is separate from the sales tax you pay on everyday purchases; the California sales tax calculator covers that transaction-level side.
Factors That Affect Your Results
Several inputs shape the result, and a few limits keep the estimate simple.
Other income level
Higher wages push gains into higher brackets, while low other income lets more of the gain sit in the 1% to 9.3% layers.
Filing status
Married / RDP filers get roughly doubled bracket thresholds, so a given gain is taxed at lower marginal rates.
Capital losses
Losses reduce taxable gain dollar for dollar before the brackets apply, directly lowering the tax.
The $1,000,000 line
Once combined taxable income exceeds $1,000,000, the 1% surcharge raises the top rate to 14.3% on the portion above the line.
- • This calculator estimates California personal income tax only and does not include the federal capital gains tax, the 3.8% net investment income tax, the AMT, or local taxes.
- • It uses the 2024 brackets and does not model credits, itemized deductions, or the federal $3,000 excess-loss cap beyond the gain offset.
Net capital loss carryforwards and certain California credits can change a real return. Treat the output of the California Capital Gains Tax Calculator as a planning estimate and confirm the final figure with the Franchise Tax Board forms or a tax professional.
According to the California Revenue and Taxation Code, the Mental Health Services Act imposes the 1% surcharge on taxable personal income above $1,000,000, including capital gain income.
To see your full federal picture alongside the state estimate, our federal income tax calculator applies the IRS brackets to the same income.
Frequently Asked Questions
Q: Does California tax capital gains?
A: Yes. California treats capital gains as ordinary personal income on your state return. Unlike the federal government, California does not apply a separate, lower long-term capital gains rate, so both short- and long-term gains are taxed through the same progressive brackets as your wages.
Q: What is the California capital gains tax rate?
A: California has no standalone capital gains rate. Your gain is added to the rest of your California taxable income and taxed from 1% up to 13.3%. The rate you actually pay depends on your total income, not on how long you held the asset.
Q: Does California give a lower rate for long-term capital gains?
A: No. California does not conform to the federal long-term capital gains preference. A stock held for ten years is taxed the same as one flipped in a week. The holding period still matters for the IRS, but it does not lower your California rate.
Q: Is there a California millionaire tax on capital gains?
A: Yes. The Mental Health Services Act adds a 1% surcharge on taxable personal income above $1,000,000. Because capital gains count as ordinary income, the surcharge raises the effective top rate on gains to 14.3% once your total California taxable income crosses $1,000,000.
Q: Does this calculator include the federal capital gains tax?
A: No. This tool estimates only the California state portion. To see what you owe to the IRS, use a federal capital gains estimate; your total bill is the sum of the two. The federal rate is usually lower for long-term gains, which is why the state piece often dominates a California resident's bill.
Q: How do capital losses affect California capital gains tax?
A: Capital losses first offset capital gains, and any remaining loss can reduce up to $3,000 of other income on your federal return. California generally follows the federal gain or loss figure, so entering your net losses lowers the taxable gain this calculator taxes.