Texas Government Code - GOV'T § 2253.076. Limitations on Certain Claims;  Maximum Retainage

(a) The amount of a subcontractor's claim, including previous payments, may not exceed the proportion of the subcontract price that the work done bears to the total of the work covered by the subcontract.

(b) A claim for specially fabricated material that has not been delivered or incorporated into the public work is limited to material that conforms to and complies with the plans, specifications, and contract documents for the material.  The amount of the claim may not exceed the reasonable cost, less the fair salvage value, of the specially fabricated material.

(c) A claim for retainage in a notice under this subchapter is not valid for an amount greater than the amount of retainage specified in the public work contract between the payment bond beneficiary and the prime contractor or between the payment bond beneficiary and the subcontractor.  A claim for retainage is never valid for an amount greater than 10 percent of the amount of that contract.