Tex. Bus. & Com. Code § 92.055
(b) A rental-purchase agreement may require the consumer to pay a late charge or reinstatement fee only if:
(1) a periodic payment is delinquent for more than:
(2) the charge or fee is in an amount not less than $5 and not more than the lesser of:
Added by Acts 2007, 80th Leg., R.S., Ch. 885 (H.B. 2278), Sec. 2.01, eff. April 1, 2009.