What is certified payroll?
Certified payroll is a weekly payroll report, signed under penalty of perjury, proving that everyone who worked on a prevailing-wage job was paid at least the wage and fringe rate the contract requires for their classification. It exists because on publicly funded work the wage rate is part of the deal, and the signature is what makes the claim enforceable.
Where the obligation comes from
On federal work it is the Davis-Bacon Act and its related acts, which set prevailing wage determinations by locality and classification. Many states have their own “little Davis-Bacon” laws covering state and municipal projects, sometimes with lower thresholds and their own forms. The wage determination attached to your contract — not a national average, not what you normally pay — is the number that governs.
What goes on the report
Each worker, their classification, hours worked each day, straight and overtime rates, gross wages, every deduction, net pay, and the fringe benefits paid — either into a bona fide plan or as cash in lieu. Then the statement of compliance, signed. Form WH-347 is the Department of Labor’s free version and most agencies accept it; some states and portals require their own.
Where it goes wrong
Classification is the expensive mistake. Paying a labourer’s rate for work the determination classifies as a finisher can mean back wages for every hour, plus liquidated damages, plus withheld contract payments — and on federal work, potential debarment. Fringe accounting is the subtle one: crediting benefits you cannot document as a bona fide plan turns a compliant wage into an underpayment on paper. Apprentices only count at apprentice rates if they are in a registered programme and within ratio.
How it touches your billing
Practically, certified payroll is a condition of getting paid: agencies and general contractors routinely hold a pay application until the week’s reports are in. So the report and the pay application move together, and prevailing-wage rates have to be in the bid in the first place — which means burdened labour rates that reflect the determination, not your usual crew cost. The labor burden calculator is the right place to work that out before the number is committed.
This is general information, not legal or payroll advice. Prevailing-wage compliance depends on your contract’s wage determination and the rules of the funding agency — confirm both with your payroll provider or counsel.