Short answer
California generally gives an insurer up to 15 calendar days to acknowledge a notice of claim and respond to communications that reasonably call for a response. After receiving proof of claim, the general rule is up to 40 calendar days to accept or deny all or part of it. Neither period guarantees a diminished value payment.
What to remember
- The 15-day duties concern acknowledgment, assistance, investigation, and responses to claimant communications.
- The 40-day period generally begins after the insurer receives proof supporting the claim and amount, not automatically on the collision date.
- If a decision requires more time, the insurer generally must send a compliant written notice within 40 days and repeat it every 30 calendar days while the decision remains pending.
- Acceptance, settlement, and payment are separate events; the Department’s guide describes a separate payment period after settlement is reached.
Start with three different claim events
People often put every claim date into one bucket. California’s rules separate notice of claim, proof of claim, and settlement. A collision can occur on one date, the owner can notify the insurer days later, and a diminished value packet can arrive only after repairs are complete.
| Event | What it means in practice | Why it matters |
|---|---|---|
| Notice of claim | A written or oral communication reasonably telling the insurer that you want to make a claim. | This starts acknowledgment, assistance, and investigation duties. |
| Proof of claim | Documentation in your possession that supports the existence and magnitude or amount of the loss. | This is the reference point for the general 40-day accept-or-deny rule. |
| Settlement reached | The claim or an agreed part of it has been accepted and the parties reach settlement. | The Department’s consumer guide describes a separate payment period after this point. |
The California Department of Insurance gives these definitions in its post-accident consumer guide. The guide is a practical summary. The full Fair Claims Settlement Practices Regulations control where their text applies.
What happens during the 15-day periods?
The Department’s guide says an insurer generally must acknowledge the claim, start any necessary investigation, provide forms and instructions, and give reasonable assistance immediately, but no later than 15 calendar days after receiving notice of claim. It also summarizes a 15-calendar-day period for responding to communications that reasonably expect a response.
That does not mean the insurer must value and pay a new diminished value request within 15 days. An acknowledgment may confirm receipt, ask for material documents, name the adjuster, or explain the next investigative step.
What does the 40-day rule actually require?
The Department’s consumer summary says an insurer generally must accept or deny the claim, in whole or in part, immediately but no later than 40 calendar days after receiving proof of claim. “Proof” is broader than a special notarized form: the guide describes documentation in the claimant’s possession that supports the claim and its magnitude or amount.
A well-organized diminished value packet can make the receipt date and evidence clear. Include the claim number, vehicle, requested amount, calculation, final repair records, market support, and an attachment index. The claim letter guide provides a concise outline.
What if the insurer says it needs more time?
A claim may require more investigation because responsibility, coverage, prior damage, repair completion, ownership, or market data is unresolved. Under California Code of Regulations section 2695.7(c)(1), an insurer that cannot decide within the general 40-day period must send written notice within that period. The notice must specify any additional information required and the continuing reasons for the delay. It must then be repeated every 30 calendar days until a determination is made or notice of legal action is served.
If the decision depends on a future event, the notice must describe the situation and estimate when a determination can be made. The regulation contains a limited exception for information that could reveal a suspected-fraud investigation. None of these provisions makes the original receipt of proof disappear: a later document request does not, by itself, reset that receipt date.
- Record the date and method of every submission.
- Ask which specific issue or document prevents a decision.
- Answer a material request once and keep the exact copy sent.
- Ask for the next written status date when the investigation continues.
- Correct factual errors promptly, but do not send unrelated material merely to add volume.
Acceptance, settlement, and payment are not the same date
California Code of Regulations section 2695.7(h) provides that, after an insurer accepts a claim in whole or in part and, when necessary, receives a properly executed release, it must immediately—and no later than 30 calendar days afterward—tender the accepted amount or otherwise perform its claim obligation. The regulation contains exceptions, including listed claim types and a policy waiting period. The Department’s guide summarizes this as payment within 30 days after settlement. A valuation offer is not necessarily an acceptance or settlement, and the parties may still disagree.
Read any check language and release before treating the matter as resolved. Confirm whether the payment addresses only diminished value, all property damage, or a broader group of claims. The property-damage release checklist covers the questions to ask.
What should you do when a response is late or incomplete?
- 1
Send a dated follow-up
Identify the original submission, delivery date, attachments, and the specific response still needed.
- 2
Ask for a supervisor
Escalate with a short chronology when the assigned adjuster does not respond or explain the delay.
- 3
Use the right outside help
The California Department of Insurance can review a claim-handling complaint. A lawyer can advise on rights, parties, releases, and deadlines.
- 4
Protect the separate legal deadline
Do not assume continued adjustment, an internal review, or a regulator complaint pauses the time to file an action.
A late response does not prove the amount of diminished value. Preserve the process issue and continue to keep the market evidence accurate. The denial guide explains how to separate claim conduct from the valuation itself.
Source check
Sources used for this guide
The links below support the legal, regulatory, market, or process points made above. They were checked on July 27, 2026.
- So You’ve Had an Accident, What’s Next?California Department of Insurance
- Fair Claims Settlement Practices RegulationsCalifornia Department of Insurance
- Consumer insurance help and complaint processCalifornia Department of Insurance
- California Code of Civil Procedure § 338California Legislative Information
Quick answers
Frequently asked questions
Does a California insurer have 15 business days or calendar days?
The California Department of Insurance describes the relevant periods as calendar days. Review the current regulation and any applicable exception for the exact claim.
When does the 40-day period start?
The general rule runs from receipt of proof of claim, not automatically from the accident date. Preserve the complete submission and delivery record because the content and receipt date can matter.
Must the insurer pay a diminished value claim within 40 days?
No. The general 40-day rule concerns accepting or denying after proof of claim. Under section 2695.7(h), the separate 30-day performance period follows acceptance and, when necessary, receipt of a properly executed release, subject to the regulation’s exceptions.
Can the insurer ask for more information?
Yes, when the information is reasonably required and material to the investigation. If a decision remains pending beyond the general 40-day period, the insurer ordinarily must state the required information and continuing reasons in writing and repeat the notice every 30 calendar days. A bare request does not automatically reset the original proof-of-claim receipt date.
How often must the insurer send a status notice if it needs more time?
After the notice due within the general 40-day decision period, section 2695.7(c)(1) generally requires another written notice every 30 calendar days until the insurer makes a determination or receives notice of legal action. A future-event notice must also estimate when a decision can be made.
Does waiting for the insurer extend the lawsuit deadline?
Do not assume so. Claim-handling periods and legal filing deadlines are separate. Government claims, contracts, releases, tolling, and other facts may change the deadline analysis.