OAR 441-730-0170: Precomputed Interest

(1) When a loan contract is repayable in substantially equal and consecutive monthly installments of principal and interest combined, interest may be precomputed and added to the principal. Interest may be precomputed even though the first installment period is more or less than one month. (2) If the first installment period exceeds one month, the amount of the agreed monthly interest charge must be reduced for the first period by 1/30th of the amount for each extra day in the first period. If the first installment period is less than one month the amount of the agreed monthly interest charge must be reduced for the first period by 1/30th of the amount for each day that the first installment period is less than one month.