Section 213.021 - Interest on Past Due Contribution(a) An employer who does not pay a contribution on or before the date prescribed by the commission is liable to the state for interest of one and one-half percent of the contribution for each month or portion of a month that the contribution and interest payments are not paid in full. The total interest applied may not exceed 37-1/2 percent of the amount of contribution due at the due date.(b) Liability for interest under Subsection (a) does not apply to an employer who: (1) failed to pay a contribution because of the bona fide belief that all or some of its employees were covered under the unemployment insurance law of another state; and(2) paid when due a contribution on all the wages of those employees under that law.Amended by Acts 1995, 74th Leg., ch. 76, Sec. 9.38(a), eff. 9/1/1995. Acts 1993, 73rd Leg., ch. 269, Sec. 1, eff. 9/1/1993.