With the exception of Alaska, Delaware, District of Columbia and Puerto Rico, the remaining states have a regulation regarding the payment of interest on delayed claim. When the wording differs from state to state, the idea is to protect the beneficiary from undue claim delays while the insurance company earns interest on that claim money. Illinois regulation 215ILCS 5/224(1)(l) states the interest rate is 9% annually if the claim is not paid within 15 days from the date of the receipt of a due proof of loss. Insurers are required to provide notice of interest under this regulation to the beneficiary at the time of the filing of the claim. It is not uncommon for insurers to give notice or pay the interest.