Relating to the accrual of interest on overdue child support.

HB 4213 increases the interest rate for overdue child support payments in Texas from 3% to 6% simple interest annually. It directly affects non-custodial parents who owe unpaid child support, applying the new rate to: (1) delinquent payments exceeding monthly obligations, (2) confirmed child support judgments, and (3) lump-sum retroactive payments. The bill sets the new rate to apply to payments due on or after January 1, 2026, while existing arrears before that date follow transitional rules (3% before 2002, current rate 2002-2025, then 6% from 2026). The law takes effect September 1, 2025, but the rate change only applies to future obligations.