Selling a car in San Diego County: four routes, and what each one asks of you
You can sell a car in San Diego County four ways: to a private buyer, as a trade-in at a dealer, to a licensed dismantler, or by sending a request to Sell My Car SoCali. On every route California leaves the same three jobs with you: sign the title over, report the sale to the DMV within 5 days, and settle the smog certificate. What changes from route to route is who pays the DMV, how the tax is figured, and how much of the work stays yours. Below is each route, then the buyer's use tax by city.
Sources re-checked .
Short answer
In San Diego County you can sell to a private buyer, trade in at a dealer, sell to a licensed dismantler, or send a request to Sell My Car SoCali. Each route still needs your signed title, a release of liability within 5 days and a settled smog certificate. On a private sale the buyer pays use tax, 7.75% to 8.75% by city.
CDTFA: City and county tax rates; DMV: Notice of Transfer and Release of Liability
Three duties that follow you down every route
The registered owner named on the title signs it over. You report the sale with a Notice of Transfer and Release of Liability, online or on form REG 138, no later than 5 calendar days after the sale. On the smog side, the Bureau of Automotive Repair (BAR) puts the test before the sale and on the seller.
BAR's reference guide (revised 11/21/2025) requires the sale check in all three of the state's program areas, so no address in San Diego County or southwest Riverside County falls outside it. BAR's page names two exceptions: gasoline, hybrid and alternative-fuel cars four model years old and newer, and a transfer between immediate family members. The DMV adds a third for a car transferred to be dismantled, covered below. A passing certificate stays good for 90 days. The full list is on the San Diego smog check guide.
Source: DMV: Notice of Transfer and Release of Liability; BAR: Smog Check; BAR: Smog Check Reference Guide (11/21/2025); DMV manual 19.030: Junking a vehicle, individual.
Selling to a private buyer
You get the smog check before the sale, hand the buyer a copy of the inspection report, sign the title, and file your release within 5 days. Selling a car you bought and used as your own needs no license: the DMV's licensee manual says such a seller is not a dealer.
The buyer takes the signed title to the DMV and takes the bill too: the DMV's change-of-ownership page puts every transfer fee on the buyer and gives 10 days to report the change. If the buyer waits more than 30 days to pay, the DMV adds a penalty, $15 in its fee table, and the release you filed stands as your record of the sale date.
For payment, meeting places and test drives, see selling privately in San Diego County.
Source: DMV: How to change vehicle ownership; DMV manual 2.025: Dealer; DMV: Registration fees.
Trading the car in at a dealer
On a trade-in the dealer is both your buyer and the retailer of your next car, and California does not subtract the trade-in from the taxable price. CDTFA's Regulation 1654 says "the retailer accepting the trade-in must include in the measure of tax the amount agreed upon between seller and buyer as the allowance for the merchandise traded in". So if you register the new car in Chula Vista or Escondido, the 8.75% rate runs on its full price, not on the price minus your trade.
The rate follows the registration address here too: CDTFA's rate guide tells a retailer selling a vehicle to collect the rate of the district where it will be registered. Two jobs stay yours. File the release with the dealer's name and the handover date. And BAR's smog page puts the check on the seller without naming any dealer exception, so agree in writing who orders it before you sign.
Source: CDTFA Regulation 1654: Barter, exchange and trade-ins; CDTFA: Know your rate; DMV: Notice of Transfer and Release of Liability; BAR: Smog Check.
Selling to a licensed dismantler
The DMV defines a dismantler as a business that buys vehicles in order to dismantle them or deals in their parts, and BAR's Consumer Assistance Program page lists selling directly to a local dismantler as one alternative to state retirement.
Under the DMV's procedures manual, a car sold for wrecking needs no smog certificate, and the dismantler owes no registration or transfer fee on it. The dismantler reports the car on a REG 42 and turns in its last plates, or a notice that it destroyed them. Your part is the signed title and the release within 5 days. For the City of San Diego's and the county's junk-car rules, see the junk car guide.
Source: DMV manual 2.030: Dismantler; DMV manual 19.030: Junking a vehicle, individual; DMV manual 19.025: Junking a vehicle, dismantler; BAR: Consumer Assistance Program.
Sending a request to Sell My Car SoCali
Sell My Car SoCali, a family owned and operated business whose owner is Christian John, buys cars across San Diego County and in southwest Riverside County, from Perris south to Temecula. A sale starts in one of two places: the form on the request page, or a call to (657) 699-0008. After a request comes in, a person calls you back.
Comparing routes? List in the request the year and mileage, whether the car starts and drives, any smog result you have, and what the title shows, such as a lender, a missing title or a Salvaged brand. The California duties do not move: the title needs your signature, and the release goes to the DMV within 5 days.
Source: DMV: How to change vehicle ownership; DMV: Notice of Transfer and Release of Liability.
What the buyer pays the DMV, city by city
On a private sale the buyer owes the tax. CDTFA: "The use tax rate is the same as the sales tax rate and is based on the address where you register your vehicle." In CDTFA's rate table effective October 1, 2026, each San Diego County rate is the 7.25% state rate plus the half-cent TransNet tax that SANDAG administers, plus any district tax the city has added:
- 7.75%: the unincorporated county, Carlsbad, Coronado, Encinitas, Poway, San Diego and Santee.
- 8.25%: El Cajon, Oceanside and Vista.
- 8.50%: La Mesa.
- 8.75%: Chula Vista, Del Mar, Escondido, Imperial Beach, Lemon Grove, National City, San Marcos and Solana Beach.
- Southwest Riverside County: 7.75% in Canyon Lake and unincorporated Riverside County; 8.75% in Perris, Menifee, Lake Elsinore, Wildomar, Murrieta and Temecula.
Example: on a $6,000 private sale, a buyer registering in Chula Vista owes $525 in use tax; a buyer in the City of San Diego owes $465. CDTFA's vehicle publication warns that a ZIP code crossing city or county lines can produce the wrong rate; check the street address on CDTFA's rate map.
As of the DMV's fee table, the buyer also pays the $15 transfer fee, an $8 smog transfer fee on a car four model years old or newer, and registration fees if the registration has lapsed or is about to. Your parent, grandparent, child, grandchild, spouse or registered domestic partner owes no use tax when you are not in the car business; siblings qualify only if both are minors, and ex-spouses after a divorce decree do not. The buyer claims it on a Statement of Facts (REG 256).
Source: CDTFA: Vehicles and use tax; CDTFA: City and county tax rates (effective October 1, 2026); CDTFA: Sales and use tax rates; SANDAG: TransNet; CDTFA Publication 52; DMV: Registration fees; DMV: Standard title transfer checklist; DMV: How to change vehicle ownership.
Repair first or sell as it is: a worked example
Example: a drivable 2010 sedan registered in Escondido fails its pre-sale smog check. You have three choices.
- Repair, then sell privately. A passing certificate lasts 90 days, so repair close to listing. After a failure BAR's steps are to review the report, repair and retest, and its Consumer Assistance Program helps pay for emissions repairs if you and the car qualify.
- Retire it through BAR's Consumer Assistance Program. As of BAR's retirement page, a car that failed its most recent smog check can bring $1,350 with no income test, or $2,000 for a household at or under 225% of the federal poverty level. The car must be drivable, you wait for BAR's letter of eligibility, and the car must not be mid-transfer, so retirement and a sale cannot overlap.
- Sell it as it is. A transfer to be wrecked or dismantled is smog-exempt, so a licensed dismantler can take the car without a passing certificate. Or put the failed result in a request to Sell My Car SoCali and go over it when a person calls you back.
The decision rule: repair only when a private buyer's price for the passing car, minus the repair bill, beats both your best as-is figure in writing and the retirement payment you qualify for. The car retirement guide compares the two.
Source: BAR: Vehicle retirement; BAR: Smog Check; DMV manual 19.030: Junking a vehicle, individual.
Questions sellers ask about where to sell
Who pays the use tax when I sell my car privately in San Diego?
The buyer pays it to the DMV, at the rate for the address where the buyer registers the car. CDTFA's table effective October 1, 2026 runs from 7.75% in the City of San Diego and the unincorporated county to 8.75% in cities such as Chula Vista and Escondido. The transfer fees are the buyer's too. Sources: CDTFA vehicle use tax, DMV ownership changes.
Does trading in my car lower the sales tax on the next one in California?
No. Under CDTFA's Regulation 1654, the dealer counts the trade-in allowance it agreed with you in the amount it taxes, so the rate for your registration address applies to the full price of the car you buy. A trade-in can spare you the work of a private sale, but it does not shrink the tax. Source: CDTFA Regulation 1654.
Where your sale goes from here
If a private sale wins, read how to sell privately and safely before you post the car. If you would rather describe the car once and take a call back, send a request on the request page or call (657) 699-0008.
More on selling a car in San Diego
- PaperworkEvery paper in a San Diego County car sale: the California title lines you sign, REG 227 and REG 262, the REG 135 bill of sale, and the DMV offices that do transfers.
- Smog checkWho gets the smog test when you sell a car in San Diego County, how long the 90-day pass lasts, which sales skip it, and what to do with a car that failed.
- Release of liabilityThe 5-day NRL or REG 138 a San Diego County seller files with the DMV: what it covers, what to keep, and how to answer a later ticket, tow or toll notice.
- Junk carHow to junk or sell a dead car in San Diego County: DMV junk status, the City's 72-hour and 4-hour street limits, and county yard rules.
- Title problemsLost pink slip, a loan still on it, an owner who died, or two names joined by AND: the California forms that clear each title problem before a San Diego sale.
- Any conditionSelling a car in San Diego County that will not start, flooded, burned, lost its catalytic converter or shows high miles: what to disclose, smog, and where it can wait.