California has a 7.5 percent base sales and use tax, but application of city, county, and district sales tax results in a confusing maze of tax rates varying by location and changing frequently. In an effort to reduce retailer errors and consumer complaints, the California State Board of Equalization (BOE) released an online mapping tool, which provides the applicable tax rate upon entry of an address. Tax rates, as well as city and county boundary lines are subject to change. Therefore, it is recommended retailers use the tool to easily find the current tax rate at a specific location.  

To access the tool, click here.