Relating to the calculation of the penalty and interest incurred on a delinquent ad valorem tax.

HB 21 modifies Texas property tax penalties and interest rates for late payments. It reduces the initial penalty from 6% to 3% for the first month a payment is late, then 0.5% per month (down from 1%) for each additional month. For taxes delinquent on July 1, the total penalty drops from 12% to 6%. The bill also halves the interest rate to 0.5% per month and applies only to penalties accruing after its effective date.