(1) Except as otherwise provided in this section, upon prepayment in full of a precomputed consumer credit sale, refinancing or consolidation entered into after September 28, 1976, the creditor shall rebate to the consumer an amount not less than the unearned portion of the credit service charge computed according to this section. If the rebate otherwise required is less than one dollar, no rebate need be made.

(2) Upon prepayment of a consumer credit sale, whether or not precomputed, except a consumer lease or one pursuant to a revolving charge account, the creditor may collect or retain a minimum charge not exceeding fifteen dollars, if the minimum charge was contracted for and the credit service charge earned at the time of prepayment is less than the minimum charge contracted for.

(3) In the following subsections these terms have the meanings ascribed to them in subsection (1) of § 37-2-204: computational period, deferral, deferral period, periodic balance, standard deferral, sum of the balances method, and transaction.

(4) If, with respect to a transaction payable according to its original terms in no more than 61 installments, the creditor has made either:

(a) no deferral or deferral charge, the unearned portion of the credit service charge is no less than the portion thereof attributable according to the sum of the balances method to the period from the first day of the computational period following that in which prepayment occurs to the scheduled due date of the final installment of the transaction; or

(b) a standard deferral and a deferral charge pursuant to the provisions on a standard deferral, the unpaid balance of the transaction includes any unpaid portions of the deferral charge and any appropriate additional charges incident to the deferral, and the unearned portion of the credit service charge is no less than the portion thereof attributable according to the sum of the balances method to the period from the first day of the computational period following that in which prepayment occurs except that the numerator of the fraction is the sum of the periodic balances, after rescheduling to give effect to any standard deferral, scheduled to follow the computational period in which prepayment occurs. A separate rebate of the deferral charge is not required unless the unpaid balance of the transaction is paid in full during the deferral period, in which event the creditor shall also rebate the unearned portion of the deferral charge.

(5) In lieu of computing a rebate of the unearned portion of the credit service charge as provided in subsection (4), the creditor:

(a) shall, with respect to a transaction payable according to its original terms in more than 61 installments, and a transaction payable according to its original terms in no more than 61 installments as to which the creditor has made a deferral other than a standard deferral; and

(b) may, in other cases, recompute or redetermine the earned credit service charge by applying, according to the actuarial method, the annual percentage rate of credit service charge required to be disclosed to the consumer pursuant to law to the actual unpaid balances of the amount financed for the actual time that the unpaid balances were outstanding as of the date of prepayment, giving effect to each payment, including payments of any deferral and delinquency charges, as of the date of the payment. The administrator shall adopt rules to simplify the calculation of the unearned portion of the credit service charge, including allowance of the use of tables or other methods derived by application of a percentage rate which deviates by not more than one-half of one percent from the rate of the finance charge required to be disclosed to the consumer pursuant to law, and based on the assumption that all payments were made as originally scheduled or as deferred.

(6) Except as otherwise provided in subsection (5), this section does not preclude the collection or retention by the creditor of delinquency charges (§ 37-2-203).

(7) If the maturity is accelerated for any reason and judgment is entered, the consumer is entitled to the same rebate as if payment had been made on the date judgment is entered.

(8) Upon prepayment in full of a precomputed consumer credit sale by the proceeds of consumer credit insurance (§ 37-4-103), the consumer or his estate is entitled to the same rebate as though the consumer had prepaid the agreement on the date the proceeds of insurance are paid to the creditor, but no later than 20 business days after satisfactory proof of loss is furnished to the creditor.