arkadvisors.co › capital-gain-tax-rate-2021-californiaCapital Gain Tax Rate 2021 California - Ark Advisor May 01, 2021 · With california not giving any tax breaks for capital gains, you could find yourself getting hit with a total state tax rate of 13.3% on your capital gains. Regardless of the year, the california capital gains tax rate of 2021 is based on the type of asset that made profitable gains that need to be assessed.