Used car sales tax and dealer fees in California
California charges sales tax on a used car at the rate for the address where you register it: 7.25% statewide plus local district taxes (10.25% in the city of Los Angeles). A trade-in doesn't lower the tax. A private-party purchase is taxed the same way, paid to the DMV when you register.
By the LotGauge team
The short answer
California charges sales tax on a used car at the rate for the address where you register it: 7.25% statewide plus local district taxes (10.25% in the city of Los Angeles). A trade-in doesn't lower the tax. A private-party purchase is taxed the same way, paid to the DMV when you register.
How the rate works in California
California's statewide sales and use tax rate is 7.25%. Most cities and counties add district taxes, so combined rates run from 7.25% to over 11%. The city of Los Angeles is 10.25%, San Francisco 8.625%, Sacramento 8.75% and San Diego 7.75% (rates effective October 1, 2026).
For a car, the rate is set by where you'll register it, not where the dealer is. A dealer in a lower-tax city still charges the rate for your registration address.
Does a trade-in lower the tax in California?
California doesn't give a trade-in tax credit. The dealer's allowance for your trade-in is included in the taxable amount, so you pay tax on the full price of the car you're buying.
A trade-in still lowers how much you finance; it just doesn't lower the sales tax.
Buying from a private seller in California
Buying from a private seller, you owe use tax instead of sales tax. It's the same rate (based on your registration address) on the full purchase price, and you generally pay it to the DMV when you register the car.
A car bought from certain close family members who aren't in the car business is exempt from use tax. Stepparents, stepchildren and ex-spouses after a divorce don't qualify.
Example: a $25,000 car with a $5,000 trade-in in Los Angeles
At Los Angeles's rate (10.25%), the tax on a $25,000 used car from a dealer is about $2,562.50, with or without a $5,000 trade-in, because California doesn't give a trade-in tax credit.
10.25% of the full $25,000 price is $2,562.50. The $5,000 trade-in doesn't change the tax in California, so it's $2,562.50 either way. Open this example in the calculator, then change the price, trade-in and ZIP to your own.
Dealer doc fees in California
On top of tax, dealers charge a documentation ("doc") fee for paperwork. The average doc fee in California is about $85, against a national average of $471 (CarEdge, State of Dealer Fees 2026).
California caps doc fees at $85 ($70 for dealers that don't register cars electronically with the DMV). A higher doc fee is above the legal limit, so ask the dealer to explain it or remove it.
The LotGauge calculator checks any doc fee you enter against the California average and the legal limit. See also how to get the out-the-door price.
Related guides
How sales tax works on a used car · The trade-in tax credit by state · Private seller vs. dealer · How to read a buyer's order
Sources
California Department of Tax and Fee Administration (CDTFA), City & County Sales & Use Tax Rates (effective October 1, 2026). CDTFA, Publication 105: District Taxes and Sales Delivered in California (vehicles taxed at the registration address). CDTFA, Annotation 140.0100 (Regulation 1654): trade-in allowances are included in the measure of tax. CDTFA, Use Tax on Vehicles (private-party purchases and family exemption). California Vehicle Code § 4456.5 (document fee limit). Doc fee averages: CarEdge, State of Dealer Fees 2026; doc fee limit: California official source. Checked November 2026. Tax figures are examples for a typical dealer purchase, not tax advice; confirm the exact amount on your purchase contract.