Quick answer: California uses the Total Loss Formula: if the cost of repairs plus the vehicle's salvage value equals or exceeds its actual cash value (ACV), the insurer may declare it a total loss. There's no fixed percentage threshold like in some states.
The formula, in practice
When the estimated cost of repair plus the vehicle's salvage value equals or exceeds its actual cash value immediately before the crash, the vehicle can be declared a total loss. In practice, most vehicles total out when repairs approach roughly 70–80% of ACV, because salvage value fills the rest of the formula — but the law is the formula, not a percentage.
What the insurer actually owes you
Actual cash value is what your specific vehicle — year, trim, mileage, options, condition — would have sold for locally the day before the accident. It is not what you owe on the loan, and not the cost of replacing it with a new one. Under California's claims regulations (10 CCR 2695.8), the insurer's settlement must be based on comparable vehicles in your local market, and must include sales tax and transfer/registration fees on top of the ACV. Check the comparable listings the insurer relied on; if they used the wrong trim or ignored your recent tires and service records, push back with documentation — settlements move more often than people expect.
If you disagree — or want to keep the car
You can invoke the appraisal provision in your policy, escalate with the carrier, or complain to the California Department of Insurance. If you'd rather keep the car, California allows owner-retained salvage: the insurer pays ACV minus salvage value and deductible, and the vehicle gets a salvage title, with inspections required before it's road-legal again.
Why the estimate quality matters
Borderline cars sometimes get totaled because parts are backordered or hidden damage is suspected — and sometimes a car that “looks totaled” is very repairable. At Spark Collision Center in Fremont we write honest teardown-based estimates, and we'll tell you early if we think your vehicle is heading toward the formula — before you burn weeks waiting. If it's repairable, we'll document why, which can matter when a marginal ACV call goes either way.