S.C. Code Ann. § 38-63-80: Interest on lump sum payment of life insurance proceeds.

When an individual life insurance policy provides for payment of its proceeds in a lump sum upon the death of the insured and the insurer fails to pay the proceeds within thirty days of submission of proof of death and all necessary claim papers needed in order to pay the claim properly, the payment must include interest at the legal rate from the date of death of the insured until the date the claim is paid.