Prevailing Wage & Certified Payroll Basics for Subcontractors

Landing a public works job is a win — until you open the contract and find a wage determination, a weekly certified payroll requirement, and a statement of compliance you have to sign under penalty of perjury. For a subcontractor bidding prevailing wage work for the first time, the paperwork side can feel like a second job.

This guide explains what prevailing wage is, which projects trigger it, what certified payroll reporting requires, and how to keep the hour-by-hour records that make compliance manageable rather than a quarterly scramble.

What is prevailing wage?

Prevailing wage is the minimum rate of pay — wages plus fringe benefits — that contractors and subcontractors must pay workers on covered government-funded construction projects. The idea is that publicly funded construction should not undercut local wage norms. The rate varies by:

• Trade classification. Electricians, plumbers, carpenters, laborers, ironworkers, and dozens of other classifications each carry their own rate. Pay an electrician at a laborer rate and you have a violation, even if the worker is fine with it.
• Geographic area. Rates are set county by county or region by region. A project in one county may have a different rate than one twenty miles away.
• Funding source. Federal contracts (and federally assisted contracts over $2,000) fall under the Davis-Bacon Act. State-funded projects fall under the relevant state's prevailing wage law — if it has one.

The applicable wage rates are published in a wage determination — a document issued by the Department of Labor (for federal work) or the state labor agency (for state work) that lists the required rates for each classification in the project's area. That wage determination gets incorporated into the prime contract, and your subcontract.

Which projects require prevailing wage?

The trigger is the funding source, not the owner's identity. The most common triggers a subcontractor will encounter:

• Federal construction contracts over $2,000 (Davis-Bacon Act), including contracts with federal agencies and most federally assisted housing, highway, and transit projects.
• State public works projects in the roughly 30 states with their own prevailing wage laws. Some match Davis-Bacon closely; others set higher rates or different thresholds.
• Projects with federal funding passed through a state agency — school construction under certain education funding, water and wastewater projects under infrastructure funding, and similar programs often carry Davis-Bacon obligations even when the contracting entity is a local government.

The fastest way to know for certain: read the contract. If prevailing wage applies, the wage determination will be attached or incorporated by reference, and there will be a clause requiring weekly certified payroll submittals.

Understanding the wage determination

A wage determination lists trade classifications and their corresponding rates in two parts: the basic hourly rate and the fringe benefit rate. Together they make up the prevailing wage obligation.

The fringe benefit piece is where many subs get caught. You can satisfy the fringe obligation in two ways:

• Pay it in cash. Add the fringe amount on top of the hourly wage. If the determination shows $38.00 basic + $14.50 fringe, paying $52.50/hr in wages satisfies it.
• Fund a bona fide benefit plan. Health insurance, retirement contributions, apprenticeship training — if the benefit plan qualifies, contributions toward it count toward the fringe obligation hour for hour.

Most subcontractors running a union workforce find that their collective bargaining agreement's wages and benefit contributions naturally meet or exceed prevailing wage. The complexity tends to land on open-shop subs who need to verify their pay structure against the applicable determination before they start the job.

Worker classifications: the most common compliance trap

Prevailing wage violations often aren't about intentionally underpaying — they're about misclassifying the work. Every trade classification in a wage determination describes a specific type of work. If a worker is performing electrician work, they must be paid at the electrician rate, even if you call them a laborer on the certified payroll.

A few classification patterns that trip subs up:

• Apprentices vs. journeyworkers. Apprentices enrolled in a registered apprenticeship program can legally be paid at reduced rates set by the program. Workers who are not registered cannot be paid apprentice rates, even if they're in training.
• Foremen. A working foreman who spends most of their day performing craft work must be classified and paid as a journeyworker, not a supervisor. A pure superintendent who isn't performing craft work is generally not covered.
• Multi-trade work. When a worker performs tasks that fall under more than one classification in a single day, they typically must be paid the higher rate for the time spent in each classification. Keeping notes on what was performed helps you document this split.

When you're unsure how work should be classified, the wage determination sometimes includes scope-of-work descriptions for each classification. If it doesn't, request a conformance (an official classification ruling) from the contracting officer before the work starts — not after.

What is certified payroll reporting?

Certified payroll is the weekly documentation requirement that goes alongside the wage obligation. Every week you have workers on a prevailing wage project, you submit a payroll report covering that week's work. On federal projects, this is typically done on Department of Labor Form WH-347. Many state agencies have their own required forms.

Each week's report lists, for every worker:

• Name, address, and the last four digits of their Social Security number
• Work classification
• Hours worked each day and total hours for the week
• Hourly rate paid and overtime rate (if applicable)
• Gross wages earned
• All deductions
• Net wages paid

The report is signed by a company officer or a designated authorized person under a Statement of Compliance — a declaration that wages were paid correctly and that the information is accurate. Signing a falsified certified payroll report is a federal crime under 18 U.S.C. § 1001. This is not paperwork formality; it is a legal certification.

Reports are typically submitted to the prime contractor, who collects from all subs and forwards them to the contracting agency. The prime is generally liable if a sub fails to comply, which is why most primes require certified payrolls promptly each week and will hold payment until they receive them.

Where records break down: the daily hours problem

Accurate certified payroll depends on one thing: knowing exactly who worked, doing what, for how many hours, on which day. When that information lives in text messages, a foreman's memory, or a spreadsheet reconstructed on Friday from the week's notes, errors accumulate before the certified payroll form even opens.

Common failure points:

• Hours rounded or estimated. When time is collected informally, it often gets rounded in ways that, across a crew and a long project, add up to under- or over-reporting.
• Project attribution errors. A crew working across multiple projects in a week needs hours assigned to the correct project. Hours attributed to the wrong job create both certified payroll errors and job cost problems.
• Classification not documented in the field. If the daily record doesn't capture what type of work was performed, classifications have to be reconstructed after the fact.
• Overtime missed or miscounted. Davis-Bacon itself doesn't require overtime pay (the FLSA and CWHSSA do), but the daily and weekly hours totals on the certified payroll must match the actual hours worked. Gaps get noticed in audits.

Building the daily record that supports certified payroll

Whatever software or process you use, certified payroll compliance comes down to having a daily record of who worked, on which project, for how many hours. That record has to be captured at the time — not reconstructed at the end of the week.

In BuildWorkPro, time tracking is built around exactly this: crew members or their supervisors log time entries tied to a specific project and date, with hours recorded in quarter-hour steps. Every entry shows who worked, when, on which job, and for how long. Notes fields let you record the type of work performed — useful for projects where one worker is covering multiple classifications in a week.

Labor rates are set per person per project, so the system computes dollar cost automatically. That's primarily useful for job costing and comparing your labor spend to what you carried in the bid — but the accurate hour-per-day record it produces is the same record you need to fill out a certified payroll report.

A manager can review entries before they're finalized, which catches the most common errors — wrong project, wrong date, transposed hours — before they become discrepancies in a weekly payroll report. Filter by project and date range and the header totals the hours for that period.

For the other half of the daily picture — what work was actually performed, by which workers, in which areas of the project — site logs capture that in a separate field record tied to the same project and date. Together, the time entry and the site log give you the documentation that both supports certified payroll and protects you in disputes.

Overtime on prevailing wage projects

The Davis-Bacon Act itself sets minimum wage rates but does not independently require overtime pay. However, two other federal laws typically apply simultaneously:

• Contract Work Hours and Safety Standards Act (CWHSSA) — applies to most federal and federally assisted construction contracts over $100,000 and requires overtime pay (1.5× the basic rate) for hours over eight in a day or 40 in a week.
• Fair Labor Standards Act (FLSA) — requires overtime for non-exempt employees for hours over 40 in a workweek. Prevailing wage classifications don't change FLSA applicability.

State laws may set stricter requirements. On daily-overtime states (California being the most common), workers on state-funded prevailing wage projects often receive daily overtime after eight hours even if they haven't hit 40 for the week.

The certified payroll form has separate columns for straight-time and overtime hours. If your time records don't capture daily hours (only weekly totals), you can't accurately complete those columns — which is another reason daily hour-by-hour logs matter more than weekly summaries.

Audit exposure and recordkeeping

The Department of Labor's Wage and Hour Division can audit prevailing wage compliance on any covered project. Prime contractors are usually required to make payroll records available to the contracting agency on request, and state agencies conduct their own audits on state-funded work.

Federal regulations under Davis-Bacon require payroll records to be maintained for three years after the project's completion. State requirements vary but are generally in the same range. What gets audited:

• Certified payroll reports
• Basic payroll records — hours worked, wages paid, deductions
• Worker classifications vs. work actually performed
• Fringe benefit plan documentation (if benefits are being credited)
• Apprenticeship program registration documents (if apprentice rates are used)

The strongest audit defense is clean records kept contemporaneously — daily time logs that match weekly payroll totals that match certified payroll reports. Discrepancies between any of those three layers are where auditors focus.

Before you bid a prevailing wage job

Most compliance problems start at bid time, not on the job. A few things to sort out before your number goes in:

• Get the wage determination early. It should be in the bid documents. If it isn't, request it — you can't price the labor component without knowing the required rates.
• Know which classifications your scope touches. Check every classification that applies to your trade. Electrical scopes, for example, often span multiple classification tiers depending on the work (inside wireman, communications, HVAC controls).
• Confirm your fringe obligation. If you're meeting the fringe requirement through benefits rather than cash, verify that your benefit plans qualify and that you have documentation of the contribution amounts.
• Plan for certified payroll submission frequency. Weekly certified payroll reporting is the norm. Make sure whoever is handling payroll knows the submission deadline — missing a week's submittal can trigger payment withholding from the prime.

Public-works jobs often carry better cash flow — progress billing with clear payment terms and government backing — but the compliance overhead is real. Pricing the job accurately and setting up the paperwork process before work starts is how experienced subs handle it. Our guide to creating a construction bid covers how to factor labor rate differences into your estimate when you're pricing prevailing wage work against your usual rate structure.