Davis Bacon Act Explained for GCs: Require…

The Davis Bacon Act requires every contractor and subcontractor on federally funded construction projects over $2,000 to pay workers the prevailing wage rates determined by the Department of Labor. Enacted in 1931 to protect local wage standards from out-of-area underbidding, the Act now affects over $182 billion in federal construction spending annually.

This guide explains the Davis Bacon Act in practical terms so you can build compliance into your operations from day one.

The Core Requirement

The Davis Bacon Act creates one mandatory obligation: pay every laborer and mechanic on a covered project at least the prevailing wage rate for their trade classification in the county where the work occurs.

"Prevailing wage" means the hourly rate (base pay plus fringe benefits) determined by the DOL to be the standard for that trade in that area. Rates vary by state, county, and construction type. A carpenter in Manhattan earns a different prevailing wage than a carpenter in rural Montana.

The Act does not set a single national rate. It localizes wage standards so federal construction projects pay workers at rates consistent with local market conditions.

Who the Act Covers

The Davis Bacon Act applies to two categories of workers on covered projects.

Laborers. Workers who perform physical work on the construction site. This includes all manual tasks from digging to cleaning to material handling.

Mechanics. Workers who apply a trade skill on the construction site. Electricians, plumbers, carpenters, ironworkers, operating engineers, and similar tradespeople all qualify as mechanics under the Act.

The Act does not cover clerical staff, supervisors who do not perform manual work, engineers who only design, or security guards. The dividing line is whether the worker performs physical construction activity at the site of the work.

How Coverage Gets Triggered

A project falls under Davis-Bacon coverage when three conditions are met simultaneously.

Federal contract or assistance. The project must be directly contracted by a federal agency or receive federal financial assistance through one of the 60+ related acts. Federal assistance includes grants, loans, loan guarantees, and insurance.

Construction activity. The work must involve construction, alteration, or repair of public buildings or public works. Maintenance, janitorial services, and non-construction activities are generally excluded.

Contract value exceeds $2,000. The total contract amount must exceed $2,000. Once the threshold is met, coverage applies to the entire contract, including any portions below $2,000.

Covered Activities	Not Covered
New building construction	Architectural and engineering design
Renovation and alteration	Equipment supply without installation
Demolition	Landscaping maintenance
Site preparation and grading	Security guard services
Mechanical/electrical installation	Janitorial services
Road and bridge construction	Survey work without construction

Understanding Wage Determinations

The wage determination is the document that lists every applicable rate for your project. Getting the right one matters more than any other compliance step.

How to find it. Go to SAM.gov, navigate to Wage Determinations, and search by state, county, and construction type (building, heavy, highway, or residential).

What it contains. Each determination lists trade classifications with two components: the base hourly rate (what hits the paycheck) and the fringe benefit rate (paid as cash, contributed to benefit plans, or both).

Lock-in rule. The determination in effect when bids open (or when the contract is awarded for negotiated contracts) applies for the project's duration. If rates increase after lock-in, your locked rate controls. This protects your bid margin from mid-project rate increases.

Multiple determinations. Projects spanning multiple counties or mixing construction types may require more than one determination. Apply the correct determination based on where and what type of work each worker performs.

Certified Payroll Step by Step

Certified payroll is how you prove compliance to the contracting agency and the DOL. Here is the process.

Step 1: Collect time data. Record every worker's daily hours by project, trade classification, and work type (straight time vs. overtime). Use time sheets, electronic time capture, or biometric systems.

Step 2: Apply rates. Calculate gross pay using the applicable determination rates. Base rate applies to straight time hours. Overtime receives 1.5x the base rate on hours exceeding 40 per week. Fringe benefits apply at the flat rate for all hours (no overtime multiplier on fringes for federal projects).

Step 3: Process deductions. Apply only lawful deductions: taxes, court-ordered garnishments, and voluntary deductions authorized in writing by the worker. No other deductions are permitted under the Copeland Anti-Kickback Act.

Step 4: Complete Form WH-347. Enter all worker data, rates, hours, and pay amounts. Complete the Statement of Compliance on the reverse. Have an authorized representative sign and date the form.

Step 5: Submit weekly. Send the completed certified payroll to the contracting agency within seven days of the payroll period end. Retain a copy in your project file.

The Subcontractor Chain

Davis-Bacon compliance flows through the entire subcontractor chain. Every tier, from your first-tier electrical sub to the third-tier specialty installer they hire, must comply with the same requirements.

GC responsibilities:

Include Davis-Bacon clauses in every subcontract
Attach the applicable wage determination to every subcontract
Collect certified payrolls from every sub tier weekly
Review sub certified payrolls for accuracy
Monitor sub worker classifications through site observations
Report suspected violations to the contracting agency

Joint liability. The DOL can pursue the GC for back wages, penalties, and debarment based on subcontractor violations. This liability exists regardless of whether the GC knew about the violation. Active monitoring is your best defense.

Common Compliance Pitfalls

These five errors generate the majority of Davis-Bacon enforcement actions.

Wrong determination. Using the wrong county, construction type, or modification number. Always verify the determination number in your contract matches the one in your files.

Misclassification. Listing skilled workers as laborers to pay lower rates. The DOL compares certified payroll classifications against observed duties during site visits.

Fringe shortfalls. Assuming existing benefit plans cover the full fringe requirement without doing the hourly equivalent calculation. Even a $0.50/hour shortfall creates a violation for every hour worked.

Late payrolls. Certified payrolls submitted more than two weeks late attract compliance officer scrutiny and often trigger broader reviews.

Missing flow-down. Failing to include Davis-Bacon clauses in subcontracts. Without the clause, you have no contractual leverage to enforce sub compliance, but you still carry the liability.

FAQs

When was the Davis Bacon Act passed and why? Congress passed the Davis-Bacon Act in 1931 in response to reports that federal construction contractors were bringing in low-wage workers from other regions to undercut local labor markets. The Act was designed to protect local wage standards on federally funded projects. It has been amended several times, with the most recent significant update in 2023.

Does the Davis Bacon Act apply to state and local projects? The Davis-Bacon Act itself applies only to federal contracts and federally assisted projects. However, 32 states have their own prevailing wage laws (called "little Davis-Bacon" acts) that apply to state and locally funded projects. When a project receives both federal and state funding, both sets of requirements apply, and the higher rate governs.

What is the penalty for violating the Davis Bacon Act? Penalties include back wages to all underpaid workers, civil fines up to $1,100 per violation, contract payment withholding, and debarment from federal contracts for up to three years. Criminal penalties apply to kickback schemes. Under the 2023 rule, a single willful violation can trigger debarment.

Can workers waive their Davis-Bacon rights? No. Workers cannot waive their right to prevailing wage. Any agreement between a contractor and worker to accept less than the prevailing wage is unenforceable. The DOL will still require back wages regardless of any waiver the worker signed.

How do apprentice rates work under Davis-Bacon? Apprentices enrolled in DOL-registered or state-approved programs may be paid a percentage of the journeyman rate as specified in their apprenticeship agreement. The apprentice-to-journeyman ratio must comply with the program's standards. Unregistered apprentices must receive full journeyman rates.

Does Davis-Bacon cover truck drivers delivering materials? Truck drivers are covered only when they perform work at the site of construction beyond simple delivery. A driver who drops off material and leaves is generally exempt. A driver who operates a concrete pump truck or assists with material placement at the site is covered for those hours.

Simplify Davis Bacon Act Compliance

SubcontractorAudit automates certified payroll review, classification monitoring, and compliance tracking across all subcontractor tiers. Request a demo to see how the platform handles Davis-Bacon compliance for GCs.

Ready to connect your money layer? SubcontractorAudit links GCs, subcontractors, owners, and lenders on every construction project — one platform for every dollar and document. Book a demo or see the platform in action.

About SubcontractorAudit

SubcontractorAudit is the Procore for the money layer — the financial nervous system connecting general contractors, subcontractors, owners, and lenders on every construction project. We automate the document, dollar, and compliance flows that move between every party on a jobsite, so money moves faster and nothing falls through the cracks.

See how it works · Compare platforms · Read our methodology