Section 345.155 - Time Price Differential Computation and Amount(a) A time price differential authorized under Subchapter C shall be computed using the average daily balance method.(b) If the amount of a time price differential otherwise authorized under Subchapter C for a billing cycle in which a balance is due is less than 75 cents a month, the holder may charge an amount that does not exceed 75 cents a month.Amended By Acts 2011, 82nd Leg., R.S., Ch. 1182, Sec. 7, eff. 9/1/2011. Acts 1997, 75th Leg., ch. 1008, Sec. 1, eff. 9/1/1997.