Texas Local Government Code - LOC GOV'T § 375.121. Interest on Assessments; Lien

(a) Assessments bear interest at a rate specified by the board that may not exceed the interest rate permitted by Chapter 1204, Government Code.

(b) Interest on an assessment between the effective date of the order or resolution levying the assessment and the date the first installment and any related penalty is payable shall be added to the first installment. The interest or penalties on all unpaid installments shall be added to each subsequent installment until paid.

(c) An assessment or any reassessment and any interest and penalties on that assessment or reassessment is a lien against the property until it is paid.

(d) The owner of any property assessed may pay at any time the entire assessment against any lot or parcel with accrued interest to the date of the payment.