If William does not file a claim, he is going to spend $1,100 out-of-pocket to fix the other car. Due to having insurance but not filing a claim, all expenses then become out-of-pocket. Some people chose not to file a claim because they do not want the claim on their insurance, their insurance to rise or to fix their car. Since he will now incur the expenses of the other car, he will pay the full repair amount.