Tex. Labor Code § 203.105

(a) An unemployment obligation assessment shall be imposed as provided by this section if after January 1 of a year:

(1) an interest payment on an advance from the federal trust fund will be due and the estimated amount necessary to make the interest payment is not available in the obligation trust fund or available otherwise; or

(2) bond obligations are due and the amount necessary to pay in full those obligations, including bond administrative expenses, is not available in the obligation trust fund or available otherwise.

(b) The unemployment obligation assessment rate is the total of the amounts required to make the payments necessary under Subsections (a)(1) and (2). The commission shall set the unemployment obligation assessment rate in an amount sufficient to ensure timely payment of interest under Subsection (a)(1), but not exceeding two-tenths of one percent. The commission shall set the unemployment obligation assessment rate in an amount sufficient to ensure timely payment of the bond obligations, including administrative expenses, and to provide an amount necessary in the commission's judgment to enhance investor acceptance of the bonds. The rate shall be based on a formula prescribed by commission rule, using the employer's experience rating from the previous year. The unemployment obligation assessment rate applies to the same wage base to which the employer's unemployment tax applies for the year.

(c) The unemployment obligation assessment is due at the same time, collected in the same manner, and subject to the same penalties and interest as other contributions assessed under this subtitle.

(d) Revenue from the unemployment obligation assessment under this section shall be deposited to the credit of the obligation trust fund under Section 203.102.