Capital Gains Calculators
California Capital Gains Tax Calculator
California gives no discount for patience — a gain you've held 10 days or 10 years is taxed exactly the same, stacked on top of your other income at ordinary rates up to 13.3%.
Calculate your California capital gains tax
Includes federal capital gains tax and NIIT for the full combined picture.
Assumes the gain is long-term for federal purposes (short-term federal gains are taxed as ordinary income too, at a higher rate). California bracket thresholds are a close approximation for 2026 — the core mechanic (ordinary rates, no LTCG discount) is exact; confirm precise thresholds with the California FTB.
The fact that surprises the most people
Why the gain "stacks" matters more than the rate itself
Because California taxes a gain as ordinary income added on top of everything else you earned that year, a large one-time gain can push your entire income into a higher bracket — not just the gain itself, but potentially some of your regular wages too, depending on where the bracket lines fall. A $500,000 gain on top of $200,000 in wages doesn't get evaluated on its own; it's evaluated as a $700,000 year.
California's brackets, and the surcharge that isn't inflation-adjusted
| Bracket | Rate |
|---|---|
| Regular progressive brackets | 1% to 12.3% |
| Mental Health Services Tax (income over $1,000,000) | +1%, for a 13.3% top rate |
The $1,000,000 Mental Health Services Tax threshold (also called the Behavioral Health Services Act surcharge) is the same flat number for every filing status — it isn't doubled for married couples filing jointly the way most of California's other brackets are, and it isn't adjusted for inflation. That makes it a fixed target that becomes easier to cross every year as incomes rise with inflation.
Combined with federal tax, the total adds up fast
A top-bracket Californian selling a large long-term gain can face roughly 13.3% state, up to 20% federal long-term capital gains tax, and an additional 3.8% federal Net Investment Income Tax — a combined rate that can approach 37% on the same dollar of gain. Unlike the federal system, which rewards a long holding period with a lower rate, California gives that patience no credit at all.
What actually helps California filers
- Loss harvesting — realizing losses in the same year to offset gains, since California allows the same $3,000 annual capital loss deduction against ordinary income as the federal system, with unused losses carried forward indefinitely.
- Spreading a large gain across tax years where structurally possible (such as an installment sale), to avoid stacking the entire amount into the 13.3% bracket in a single year.
- Timing relative to the $1,000,000 MHT threshold, since it's a fixed, non-inflation-adjusted line that a single large sale can cross even if your income wouldn't otherwise approach it.
California's lack of a preferential capital gains rate confirmed directly by the Franchise Tax Board's own published guidance. Bracket thresholds are a close approximation for 2026 based on multiple independent sources and inflation-indexing patterns; the $1,000,000 Mental Health Services Tax threshold and its non-doubling for joint filers are both confirmed precisely. This is a planning estimate, not tax advice — a CPA can model your specific situation, especially near major bracket thresholds.
Frequently asked questions
Before you sell an appreciated asset in California.
Does California have a lower tax rate for long-term capital gains?
No. California taxes all capital gains — short-term and long-term alike — as ordinary income, using the same progressive brackets that apply to wages. There's no discount for how long you held the asset.
What is California's top capital gains tax rate?
13.3% — the top regular bracket of 12.3%, plus an additional 1% Mental Health Services Tax on taxable income above $1,000,000.
Is the $1,000,000 Mental Health Services Tax threshold doubled for married couples?
No. Unlike most of California's other tax brackets, the $1,000,000 threshold is the same flat number regardless of filing status, and it isn't adjusted for inflation.
How does a capital gain affect my overall California tax bracket?
The gain is added directly to your other income for the year, and the combined total is taxed under the regular brackets — a large gain can push both the gain itself and potentially some of your regular income into a higher bracket.
What's the combined state and federal tax on a large California capital gain?
For a top-bracket filer, roughly 13.3% California plus up to 20% federal long-term capital gains tax plus 3.8% federal Net Investment Income Tax — a combined rate that can approach 37% on the same gain.