Material suppliers certified payroll requirements generally do not apply to a business whose only role on a federal or federally assisted project is delivering materials, articles, supplies, or equipment. The Davis-Bacon Act (DBA) has long exempted bona fide material suppliers from prevailing wage and certified payroll obligations. That exemption ends the moment a supplier's employees perform construction, alteration, or repair work at the site of the work beyond simply dropping off a product.
This distinction carries real payroll risk. Suppliers, contractors, and payroll teams often assume "we just deliver materials" settles the question, but fabrication location, onsite installation, and how a facility is set up all factor into whether a supplier's workers count as covered laborers and mechanics. Getting this wrong can mean unpaid back wages, denied invoices, or an audit finding months after the work is done. eBacon tracks certified payroll hours separately for crews that both deliver and install, so WH-347 reporting reflects only the covered portion of the work.
A bona fide material supplier's only obligation on the contract is supplying materials, not performing labor at the jobsite.
A subcontractor, by contrast, performs actual construction, alteration, or repair work at the site of the work. Once a supplier's employees do more than deliver a product, such as installing it, assembling it onsite, or performing site-specific fabrication, that portion of the work can shift them into subcontractor territory. The key question is not what the business calls itself. It is what the workers actually do and where they do it.
Fabrication performed at a supplier's permanent, established manufacturing or processing plant, away from the jobsite, generally stays outside Davis-Bacon coverage as material supply. Fabrication performed at a facility set up specifically for the project, sometimes called a secondary construction site, can be treated differently and may trigger coverage depending on the facts.
Onsite installation is the clearest trigger point for certified payroll. Suppliers who merely deliver materials to the jobsite are not covered. Suppliers whose crews then install, assemble, or fabricate at the jobsite are generally performing construction work for that scope, which typically requires certified payroll reporting for the employees and hours involved, even if the same company's manufacturing employees remain exempt.
Payroll teams run into the same handful of errors on almost every mixed supplier contract. Catching these early prevents back wage claims and rejected certified payroll submissions.
Review every supplier contract for scope beyond delivery before payroll setup begins. If installation, assembly, or onsite fabrication is part of the deal, plan for certified payroll on that portion of the work from day one, not after a compliance review flags it. eBacon follows through where others just promise, automating WH-347 generation for the covered portion of a mixed supplier scope so your team is not left reconstructing records after the fact.
Bona fide material suppliers whose only obligation is delivering materials are generally exempt. The exemption does not extend to installation, assembly, or onsite fabrication work performed by the same company's employees.
Fabrication at an established, non-project-specific commercial facility generally stays outside Davis-Bacon coverage. Fabrication at a site set up specifically for the project may be treated differently depending on the facts.
A material supplier only delivers a product. A subcontractor performs construction, alteration, or repair work at the jobsite. A single company can be both, depending on the specific task.
Drivers who only transport and deliver materials to the site are generally not covered. Time spent performing labor at the site beyond delivery, such as unloading into a specific installation, may require closer review.
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