What is loss of use after a car crash in California?

It's money for being without your car while it's repaired or replaced after someone else damaged it. California's civil jury instruction CACI No. 3903M measures it as the reasonable cost to rent a similar vehicle for the time reasonably necessary to repair or replace yours.

How many days of loss of use can I claim?

CACI No. 3903M ties it to the amount of time reasonably necessary to repair or replace the vehicle. Delays you can't explain may be disputed, so keep the shop's timeline, parts-delay notes, and your messages with the adjuster.

Does uninsured motorist property damage coverage pay for a rental?

Not under the coverage described in Insurance Code section 11580.26. That section says uninsured motorist property damage does not include compensation for loss of use, and it caps that coverage at the car's actual cash value or $3,500, whichever is less. Rental reimbursement under your own policy is a separate coverage, if you have it.

How long does the insurer have to answer my claim?

Under the California Fair Claims Settlement Practices Regulations, an insurer generally must accept or deny a claim within 40 calendar days after receiving proof of claim (10 CCR 2695.7(b)), and a denial of a third-party claim must be in writing.

Loss of use in California: getting paid for the days without your car

General information, not legal advice. This site is not a law firm and does not provide legal services. Laws change and every claim is different. Check the official sources linked below, and talk to a licensed professional about your situation.

The short version

Loss of use is money for the time you're without your car after someone else damaged it.
California's civil jury instruction measures it as the reasonable cost to rent a similar vehicle for the time reasonably necessary to repair or replace yours (CACI No. 3903M).
It applies whether the car is being repaired or replaced (for example, after a total loss).
Uninsured motorist property damage coverage doesn't include loss of use (Insurance Code §11580.26).
The general deadline to sue over damage to a car is 3 years (Code of Civil Procedure §338(c)(1)). Small claims court handles claims up to $12,500 for individuals.

What "loss of use" means

When someone else's driver hits your car, the repair bill isn't the only cost. You may spend days or weeks without a car. California law treats that lost time as part of the damage.

The jury instruction California courts use, CACI No. 3903M, says that to recover loss of use you must prove "the reasonable cost to rent a similar" vehicle "for the amount of time reasonably necessary to repair or replace" it. Source: CACI No. 3903M, Loss of Use of Personal Property (Judicial Council of California Civil Jury Instructions, 2026 ed.)

The court cases listed with that instruction say the same thing in older language. One California Supreme Court case says recovery for losing the use of a damaged vehicle "is generally to be determined with reference to the period of time reasonably required for the making of repairs" (Valencia v. Shell Oil Co. (1944) 23 Cal.2d 840, 844). Another says the value of loss of use "is the rental value of a substitute vehicle" (Collin v. American Empire Insurance Co. (1994) 21 Cal.App.4th 787, 818).

This sits on top of California's general rule that someone who causes harm owes enough to "compensate for all the detriment proximately caused" by it (Civ. Code §3333).

Who pays it

Where you're claiming	What usually decides it
The at-fault driver and their liability insurer (third-party claim)	California damages law: CACI No. 3903M and Civ. Code §3333. You still have to show the days and the rental cost were reasonable.
Your own collision coverage	Your policy. Rental reimbursement is usually a separate, optional coverage with its own daily and total limits. Check your declarations page.
Your uninsured motorist property damage (UMPD)	Insurance Code §11580.26 says this coverage "does not include compensation for loss of use of the motor vehicle," and caps it at the car's actual cash value or $3,500, whichever is less.

Source: Ins. Code §11580.26

How the amount is figured

Two numbers drive it:

The daily cost of a similar vehicle. "Similar" is the key word in CACI No. 3903M. A compact rental for a compact car is easy to defend. A luxury SUV for a compact car isn't.
The number of days reasonably needed to repair the car, or to replace it if it's a total loss.

Arguments usually happen over the second number. The insurer may say the shop was slow, parts delays weren't necessary, or you waited too long to get the car into a shop. You don't have to accept that, but you'll need records to answer it.

What to save

Rental receipts if you rented, showing the daily rate and dates.
The shop's timeline: drop-off date, estimate date, when the insurer approved the repair, parts-delay notes, and pickup date.
Your messages with the adjuster, especially anything about approving the repair or a rental.
If you didn't rent, a written list of the dates you were without the car and a few quotes for a similar rental from that time, since the instruction ties the amount to what a similar rental reasonably costs.
For a total loss, the date the insurer told you it was a total loss and the date it paid.

Insurer timelines that can help

The California Fair Claims Settlement Practices Regulations set deadlines for insurers:

They generally must accept or deny a claim within 40 calendar days after receiving proof of claim, and a denial of a third-party claim must be in writing (10 CCR §2695.7(b), (b)(1)).
A written denial must tell you that you can have it reviewed by the California Department of Insurance, with the address and phone number of the unit that does it (10 CCR §2695.7(b)(3)).
If they need more time, they must tell you in writing what they still need, and update you every 30 calendar days (10 CCR §2695.7(c)(1)).
They may not try to settle with an offer that is unreasonably low (10 CCR §2695.7(g)).

Sources: 10 CCR §2695.7 text (Cornell LII) · Fair Claims regulations index, CA Dept. of Insurance

Delays on the insurer's side are worth writing down. They can matter when you're explaining why the repair took as long as it did.

If the insurer won't pay

Ask in writing and include your days, the daily rate, and your records. Our diminished-value demand letter template has an optional loss-of-use line you can use even for a loss-of-use-only request.
Get any denial or partial offer in writing, with the reason.
Ask the Department of Insurance for help if you think the claim is being mishandled: CDI, Getting Help.
Small claims court. Individuals can sue for up to $12,500, the filing fee is $30 to $100, you can't bring a lawyer into court, and if you file the case you can't appeal a loss. You usually sue the driver, not the insurance company, and the court expects you to ask for the money first. California Courts, Small claims · Ask for the money

Watch the 3-year deadline for property-damage lawsuits: CCP §338(c)(1). If a government vehicle was involved, the claim process and deadlines are different and much shorter; start with the courts' ask-for-money page.

What diminished value is and when California drivers can claim it: the value your car loses even after a good repair.
California diminished-value demand letter template
The 17c formula and why it isn't California law

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Published 2026-10-25 · Last reviewed October 2026