Establishes rules to govern contracts between contractors, subcontractors, and other parties to construction contracts

HB 1089 establishes clear rules for payment and contract terms in Missouri's private construction industry. It requires owners to pay contractors within 40 days of receiving a valid invoice and invalidates contract clauses that allow withholding payment for unrelated disputes, force continued work without payment, or require extra work without prior payment agreements. The bill directly affects owners, contractors, subcontractors, and suppliers by ensuring timely payments and preventing unfair terms that could delay or block payment for completed work. Key provisions include banning "pay-if-paid" clauses (where payment to subcontractors depends on owner payment) and requiring written notice before taking adverse actions like withholding payment. These changes aim to streamline payments and protect workers and subcontractors from payment delays caused by contractual loopholes.