Texas Property Code - PROP § 28.002. Prompt Pay Required

(a) If an owner or a person authorized to act on behalf of the owner receives a written payment request from a contractor for an amount that is allowed to the contractor under the contract for properly performed work or suitably stored or specially fabricated materials, the owner shall pay the amount to the contractor, less any amount withheld as authorized by statute, not later than the 35th day after the date the owner receives the request.

(b) A contractor who receives a payment under Subsection (a) or otherwise from an owner in connection with a contract to improve real property shall pay each of its subcontractors the portion of the owner's payment, including interest, if any, that is attributable to work properly performed or materials suitably stored or specially fabricated as provided under the contract by that subcontractor, to the extent of that subcontractor's interest in the owner's payment.  The payment required by this subsection must be made not later than the seventh day after the date the contractor receives the owner's payment.

(c) A subcontractor who receives a payment under Subsection (b) or otherwise from a contractor in connection with a contract to improve real property shall pay each of its subcontractors the portion of the payment, including interest, if any, that is attributable to work properly performed or materials suitably stored or specially fabricated as provided under the contract by that subcontractor, to the extent of that subcontractor's interest in the payment.  The payment required by this subsection must be made not later than the seventh day after the date the subcontractor receives the contractor's payment.