Establishes rules to govern contracts between contractors, subcontractors, and other parties to construction contracts
HB 3166 creates a new section of Missouri law governing private construction contracts and payment practices among owners, contractors, subcontractors, sub-subcontractors, and suppliers. It defines key terms such as “construction contract,” “owner,” “pay application,” “subcontractor,” and “work,” and applies to a broad range of construction-related services and tiers in the contracting chain. The bill is aimed at non-governmental construction projects and generally covers written or oral agreements for construction, renovation, repair, demolition, design, engineering, and related labor and materials.
The bill makes the rights and duties it creates nonwaivable, meaning contract language that tries to override them would be void as against public policy. It prohibits a range of common contract provisions, including clauses that allow withholding payment beyond the disputed amount, require continued work without payment, force waiver of claims as a condition of payment, impose certain adverse actions without notice and an opportunity to cure, require out-of-state law or dispute resolution, or make payment from an upstream party a condition precedent to payment downstream. It also requires prompt payment rules: owners must pay contractors within 40 days after receipt of an invoice or pay application for satisfactorily completed work, and contractors must pay subcontractors within seven days after receiving payment from the owner for that subcontractor’s work.
The bill also imposes notice requirements before payment can be withheld. An owner who intends to withhold payment must provide written notice within 15 days, stating the amount withheld, the specific reasons, the responsible party or trade, and the portion attributable to each responsible party; failure to give timely notice is treated as acceptance of the pay application, subject to a later claim for newly discovered noncompliant work. Similar notice obligations flow down the chain from contractor to subcontractor and to lower-tier parties, and the bill requires that withholding be limited to the reasonable value of the noncompliant work. The measure excludes owner-occupied residential property of four units or less and applies only to contracts entered into after August 28, 2026.
The general sentiment reflected in the bill text and caption is pro-payment and pro-contract fairness for contractors and subcontractors, with an emphasis on preventing unfair withholding and shifting of risk down the construction chain. Because there are no committee transcripts or recorded votes provided, there is no direct evidence of debate or partisan division in the available materials. The structure of the bill suggests support for stronger prompt-payment protections and limits on one-sided contract terms, while the main likely point of contention is whether the bill unduly restricts private contracting freedom and owner leverage to address defective or delayed work.
HB 3166 would add section 436.302 to chapter 436, RSMo, creating a new statutory framework for private construction contracts in Missouri. It would invalidate conflicting contract terms, require prompt payment and notice procedures, and extend payment and notice protections through multiple tiers of contractors and suppliers. The bill would affect owners, general contractors, subcontractors, sub-subcontractors, and suppliers on nonresidential and most non-owner-occupied residential construction projects, while exempting owner-occupied residential projects of four units or fewer and applying only to contracts entered into after August 28, 2026.
The bill appears generally favorable to contractors and subcontractors by strengthening prompt-payment rights, limiting pay-if-paid and similar clauses, and restricting unilateral withholding or termination practices. In the absence of recorded committee discussion or votes, the available context suggests a policy choice aimed at fairness and predictability in construction payment disputes rather than a controversial partisan measure. Any opposition would likely come from owners, developers, or contract drafters concerned about reduced flexibility in allocating risk and managing noncompliant work.
The main points of contention are likely to be the bill’s limits on private contract terms and its mandatory payment timelines. Owners may object to the prohibition on clauses that condition payment on upstream payment, the restriction on withholding beyond the disputed amount, and the requirement to provide detailed notice within short deadlines before withholding funds. Contractors and subcontractors, by contrast, would likely support these provisions as protections against delayed payment, unfair backcharges, and forced waiver of claims. Another possible dispute is the bill’s broad application to lower-tier parties and its treatment of out-of-state law and dispute resolution clauses, which could be viewed as a significant override of negotiated contract terms.