California sales tax calculator is as per the California sales tax percentage rate effective 1st January 2020. The statewide California sales tax rate is 7.25%. This rate is made up of 6.00% state sales tax rate and an additional 1.25% local rate. Further,there can be California local sales tax rates which vary by district. Sellers must collect sales tax along with applicable local taxes from buyers for any sale transaction within the limit of the state of California