Tex. Finance Code § 347.204: PURCHASE OF ADDITIONAL INSURANCE AFTER DATE OF CREDIT DOCUMENT.

(a) A consumer may:

(1) purchase any insurance authorized by this chapter after the date of the credit document; and

(2) include the amount of the insurance premium in the unpaid balance of the credit transaction.

(b) Interest accrues on the insurance premium at a rate that does not exceed the interest rate or time price differential applicable to the credit transaction on the date the insurance is purchased.

(c) The additional insurance premium and interest may be paid in any period and any number of installments to which the consumer and creditor agree.

Acts 1997, 75th Leg., ch. 1008, Sec. 1, eff. Sept. 1, 1997.