How long does the insurance have to claim fault?

It been almost 1 week since the car accidents. The insurance is still waiting to contact the other driver who should be at fault.

My question, how long does it take to decide rather they're at fault or not?

Answer

Sounds like you are dealing with the other person's insurance.

Insurance companies have up to 30 days before making a decision. We know that is a long time waiting without a vehicle, but state's legislators allow for that time frame on the coverage, liability, and total loss issues.

Good Luck,
Hector.