31-1-235. Delinquency fee. (1) The holder of a retail installment contract or a retail charge account agreement may collect a delinquency charge on each installment in default for a period not less than 10 days in an amount not to exceed $10 or, alternatively, the holder may calculate a fixed delinquency fee that is expressed as an interest rate not exceeding 15% of each installment in default. The delinquency charge expressed in this subsection as a simple interest rate represents a method of calculating a fixed delinquency charge and is not interest.

(2) This section does not preclude a holder of a retail installment contract or retail charge account agreement from collecting, in addition to the delinquency charge, regularly accruing interest at the current contract rate applicable under the terms of the buyer's and seller's contract, provided the contract was made on simple interest and is not a precomputed contract.

(3) A retail installment contract may provide for the payment of both a delinquency charge as permitted in subsection (1) and attorney fees not exceeding 15% of the amount due and payable under the contract when the contract is referred for collection to an attorney not a salaried employee of the holder of the contract and for court costs and actual and reasonable out-of-pocket expenses incurred in connection with the delinquency.