No payment shall be delayed because of the failure of another prime contractor on the project to complete his contract. Should final payment to any prime contractor beyond the date the contracts have been certified to be completed by the designer or architect, accepted by the owner, or occupied by the owner and used for the purposes for which the project was constructed, be delayed by more than 45 days, the prime contractor shall be paid interest, beginning on the 46th day, at the rate of one percent (1%) per month or fraction thereof unless a lower rate is agreed upon on the unpaid balance as may be due. In addition to the above final payment provisions, periodic payments due a prime contractor during construction shall be paid in accordance with the provisions of this section and the payment provisions of the contract documents that do not conflict with this section, or the prime contractor shall be paid interest on any unpaid amount at the rate stipulated above for delayed final payments. The interest shall begin on the date the payment is due and continue until the date on which payment is made. The due date may be established by the terms of the contract. Funds for payment of the interest on state-owned projects shall be obtained from the current budget of the owning department, institution, or agency. Where a conditional acceptance of a contract exists, and where the owner is retaining a reasonable sum pending correction of the conditions, interest on the reasonable sum shall not apply.
N.C. Gen. Stat. § 143-134.1