Used Car Sales Tax in California: Rates, Exemptions & Refunds

Used car sales tax in California runs between 7.25% and 11.25% of the purchase price, depending on where you register the vehicle. The 7.25% statewide base rate applies everywhere; local district taxes add anywhere from nothing to about four additional percentage points on top.¹ The rate is tied to your home address, not the dealership’s, and the taxable amount is the full price of the car with almost no deductions.

How Your Rate Is Determined

Every used car sale starts with the 7.25% state base. Most cities and counties then add voter-approved district taxes, which range from 0.10% to 2.00% per district and can stack when a location falls inside more than one district.¹

What matters is the address where the vehicle will be registered.² Buying across a county line to chase a lower rate doesn’t work; the DMV applies the rate for your residence. As of January 2026, combined rates run from 7.25% in lower-tax counties like Alpine and El Dorado up to 11.25% in cities such as Lancaster and Palmdale.³ The CDTFA publishes an online rate lookup keyed to street address, and running your address through it before you sign anything is the easiest way to know your exact number.

What Counts as the Purchase Price

The CDTFA defines the taxable purchase price broadly. It includes cash, checks, assumed loans, and the fair market value of anything traded or exchanged for the vehicle.² A few specifics catch buyers off guard.

Trade-Ins Don’t Reduce the Tax

California is not a state that lets you subtract your trade-in before computing tax. Buy a $20,000 car and hand over a $5,000 trade, and you still owe tax on the full $20,000. The regulations explicitly require the trade-in allowance to be counted in the measure of tax.⁴ Buyers moving from states that offer a trade-in deduction are the ones most often surprised.

Rebates Versus Negotiated Discounts

A negotiated discount lowers the taxable amount because it lowers the price you actually agree to pay. Negotiate an $18,000 car down to $16,000 and you owe tax on $16,000. A manufacturer rebate works differently. Pay $18,000 and receive a $2,000 rebate check from the manufacturer afterward, and you still owe tax on the full $18,000. Third-party incentives are treated the same way as rebates.

Dealer Fees

Document preparation fees, mandatory warranties, and dealer-imposed smog certification charges are taxable. The DMV collects tax on the vehicle sales price at registration, and the dealer separately reports and remits tax on those add-on charges through its own CDTFA return.⁵ Even when they show up as separate line items on your contract, you’re paying tax on them.

Government charges are outside the taxable base. DMV registration, title transfer fees, and the California Tire Fee ($1.75 per new tire, listed separately on the receipt) are not part of the purchase price for tax purposes.⁶

Optional Warranties and Service Contracts

An optional extended warranty or service contract sold through the dealer is not subject to sales tax, as long as the dealer remits the premium to the warranty provider.⁷ If you buy one at the same time as the vehicle, check that it appears as a separate, non-taxable line on the contract.

Dealer Sale or Private Sale: Who Collects, When You Pay

The rate is the same either way. What changes is who handles the paperwork. California imposes use tax at the same rate as the sales tax whenever a vehicle is bought for use in the state and the seller doesn’t collect sales tax.²

A licensed dealer collects the full tax at the point of sale and remits it to the CDTFA and DMV. You pay it upfront as part of the deal, and it appears on the sales contract.

In a private-party sale, you pay the use tax directly to the DMV when you register the vehicle and transfer the title.² The DMV wants documentation of the price, either the amount written on the back of the title or a separate bill of sale. If for any reason you don’t complete registration through the DMV, you owe the tax to the CDTFA directly.

When the DMV Questions Your Purchase Price

The DMV won’t automatically accept a suspiciously low price. If the number looks off, you may be asked to fill out a Statement of Facts (REG 256) explaining why. If you can’t justify it, the DMV bases the use tax on a higher figure. When neither buyer nor seller can establish a price, the DMV may use the midpoint between low and high values in a current vehicle valuation guidebook.⁸

If you legitimately paid below market, bring the paperwork. A detailed bill of sale, photos of damage, repair estimates, or a vehicle history report showing salvage or flood history all help. Without that kind of evidence, expect the taxable value to be adjusted upward.

Transfers That Are Exempt From Tax

A few transactions don’t trigger tax at all, but the qualifying rules are narrow.

Transfers Between Family Members

Use tax doesn’t apply when a vehicle is transferred between a parent, grandparent, child, grandchild, or spouse, provided the seller isn’t in the business of selling vehicles. Registered domestic partners qualify as well. Sibling transfers are exempt only if both siblings are minors related by blood or adoption.⁹ The registration application has to include a completed REG 256 identifying the family relationship.¹⁰

Gifts

A true gift, with nothing exchanged in return, is exempt. “Gift” must be written on the title where the purchase price would ordinarily go, and the new owner has to submit a REG 256 confirming the gift and stating the vehicle’s estimated value.¹⁰ If the DMV finds that something of value changed hands, the exemption fails.

Revocable Trust Transfers

Transfers into a revocable trust are exempt only when four things line up: the seller keeps an unrestricted power to revoke the trust, beneficial ownership doesn’t change, the trust provides that the property reverts to the seller on revocation, and the only consideration is the trust’s assumption of an existing loan secured solely by the vehicle.⁹ Miss one condition and the transfer is taxable.

Cars Bought Out of State

A used car bought in another state and brought to California owes California use tax. You get credit for any sales or use tax already paid to the other state, so you only owe California the difference. Pay $1,500 in tax elsewhere and owe $2,000 to California, and your balance due is $500.² The credit only covers taxes equivalent to a retail sales or use tax that were paid before you stored or used the vehicle in California.¹¹

There’s also a 12-month presumption to know about. If you’re a California resident and you bring the vehicle into the state within 12 months of purchase, the CDTFA presumes it was bought for use in California and taxes it.² You can rebut the presumption with documentation showing the vehicle was first functionally used and registered outside California, but the burden is on you.

Getting a Refund If You Overpaid

If tax was overcharged, whether because of a wrong rate, an incorrect purchase price, or a missed exemption, you can file for a refund using CDTFA Form 101-DMV, either by mail or online. The claim needs the exact refund amount, your VIN, the vehicle make and year, the purchase price, the date you paid the tax, and a written explanation. Include the bill of sale, purchase contract, or other proof of what you actually paid.¹²

File within three years from the date you registered with the DMV, or six months from the date of overpayment, whichever is later.¹² A denial comes with a written explanation of the reasons. You can request an appeals conference, though granting one is at the CDTFA’s discretion. If the denial holds, you have 90 days from the mailing of the Notice of Denial to file a refund suit in court.¹³

1
California Department of Tax and Fee Administration. California City and County Sales and Use Tax Rate Information
2
California Department of Tax and Fee Administration. Tax Guide for Purchasers of Vehicles
3
California Department of Tax and Fee Administration. California City and County Sales and Use Tax Rates
4
California Department of Tax and Fee Administration. Sales and Use Tax Regulations – Article 14 – Exchanges, Returns, Defects
5
California Department of Tax and Fee Administration. Important Information for Used Motor Vehicle Dealers Paying Tax to DMV
6
California Legislative Information. California Public Resources Code 42885
7
California Department of Tax and Fee Administration. Sales and Use Tax Annotations – 490.0620 – Parts Furnished by Dealer Under Used Car Warranty
8
California State Department of Motor Vehicles. 4.010 Calculating Use Tax Amount
9
California Department of Tax and Fee Administration. Sales and Use Tax Law – Section 6285
10
California State Department of Motor Vehicles. 4.035 Transactions Not Subject to Use Tax
11
California Department of Tax and Fee Administration. Sales and Use Tax Law – Section 6406
12
CA.gov. Claim for Refund or Credit for Tax Paid to DMV – CDTFA-101-DMV
13
California Department of Tax and Fee Administration. Appeals Procedures Sales and Use Taxes and Special Taxes and Fees