Davis-Bacon Overtime Rules: 40-Hour Trigger, Fringes, and Penalties

Davis-Bacon overtime rules require contractors on covered federal construction contracts over $100,000 to pay laborers and mechanics one and one-half times their basic hourly rate for every hour worked beyond 40 in a workweek.¹ The 1.5 multiplier applies to the cash wage portion of the prevailing rate only. Fringe benefits are paid at straight time for every hour worked, including overtime hours. Confusing those two components is the most common and expensive mistake on federal jobs.

The 40-Hour Weekly Trigger, and No Daily Overtime

Overtime on Davis-Bacon projects is governed by the Contract Work Hours and Safety Standards Act (CWHSSA). It uses a weekly threshold: any covered hour past 40 in a workweek gets the premium.¹

There is no federal daily overtime requirement. CWHSSA originally included a daily trigger, but Congress repealed it in 1986.² A worker can put in four ten-hour days and owe zero overtime as long as weekly hours stay at 40 or below. Some states impose their own daily overtime rules on top of federal law, and where they do, the stricter standard controls. From the federal side, only the workweek matters.

If a particular contract falls below CWHSSA’s $100,000 threshold or a worker sits outside CWHSSA coverage, the Fair Labor Standards Act still applies to eligible employees.³ The rate and trigger are the same. The difference is enforcement: CWHSSA carries its own liquidated damages.

Calculating the Premium on the Basic Rate Only

Start with the basic hourly rate listed in the wage determination for the worker’s classification. That rate is the cash wage portion, not the fringe. Multiply it by 1.5. That is your overtime rate.

Say the wage determination sets a basic rate of $30.00 with a $10.00 fringe. The full prevailing wage is $40.00 per hour. For an overtime hour:

Basic rate times 1.5: $30.00 × 1.5 = $45.00
Fringe at straight time: $10.00
Total owed for the overtime hour: $55.00

A contractor who mistakenly multiplies the full $40.00 by 1.5 ends up paying $60.00 per overtime hour. That overpayment doesn’t get you in trouble with the Department of Labor, but it does blow up your bid math. The dangerous mistake is the other direction: paying 1.5 times only $30.00 and forgetting the fringe entirely, or paying the straight $30.00 plus fringe with no premium at all. Both scenarios generate back wages, potential withholding from your contract payments, and, in a serious case, debarment.⁴

Fringe Benefits During Overtime Hours

You owe the full prevailing fringe amount for every hour a worker performs covered work, overtime hours included. But the fringe stays at the straight-time figure. The half-time premium does not attach to fringe contributions, whether those are paid into a bona fide plan (health, pension, apprenticeship) or paid as cash in lieu of benefits.⁵

Some wage determinations list the fringe as a percentage of the basic rate rather than a flat dollar figure. In that case, the percentage still applies to the straight-time basic rate during overtime hours. A 10 percent fringe on a $30.00 basic rate is $3.00 per hour during both straight time and overtime. You do not recalculate it against the $45.00 overtime rate.⁵

Payroll records need to separate the base wage, the overtime premium, and the fringe contribution for each worker. Lumping them together is a red flag in an investigation.

When a Worker Performs Two or More Classifications

A single worker often performs tasks in more than one classification during a week. Thirty hours of concrete work at one rate, eighteen hours of carpentry at a higher rate, and now you are eight hours into overtime. Two methods are available for the premium on those eight hours.

The default is a weighted average. Add up all straight-time earnings for the week, excluding fringes. Divide by total hours worked. That gives you the “regular rate” for the week. The overtime premium owed is half of that regular rate, multiplied by the overtime hours. If total straight-time wages come to $516.00 across 48 hours, the regular rate is $10.75, and the premium owed is $10.75 × 0.5 × 8 = $43.00 on top of the straight-time pay already earned.

The alternative requires a written agreement in advance between the worker and the contractor. Under that agreement, the overtime hours are paid at 1.5 times the rate for whichever classification the worker is actually performing during those specific overtime hours. Depending on which classification the overtime falls in, the premium can be higher or lower than under the weighted average.⁶ Without that agreement in place before the work is done, the weighted average controls.

Which Contracts and Workers Are Covered

The Davis-Bacon Act itself applies to federal construction contracts exceeding $2,000.⁴ CWHSSA’s overtime provisions kick in at a higher threshold: contracts exceeding $100,000.⁷ A contract between $2,000 and $100,000 still requires prevailing wages, but its overtime obligations run through the FLSA rather than CWHSSA’s penalty structure.

Coverage reaches laborers and mechanics on the site of the work, including apprentices and trainees in registered programs.⁸ Supervisory, administrative, and clerical staff who do not perform physical or manual work on the site fall outside both the prevailing wage and overtime rules. CWHSSA also does not apply to contracts for transportation, communications, or the purchase of supplies and materials ordinarily available on the open market.⁷

Truck drivers are a special case. As of mid-2024, a nationwide court injunction blocks the Department of Labor from enforcing a provision that would have covered delivery drivers’ onsite time. While that injunction is in place, drivers making deliveries from offsite locations are generally not covered for loading, unloading, or waiting time. If a driver performs actual construction work on the site beyond delivery, that non-delivery time is covered at the appropriate classification rate.⁹

Certified Payroll: What Proves You Paid Correctly

Every week in which covered work is performed, the prime contractor and every subcontractor must submit a certified payroll to the contracting agency. The standard form is the WH-347, though any format with the same information is acceptable.¹⁰ Each submission needs an individually identifying number for each worker (typically the last four digits of a Social Security number), daily hours, the wage rate, and a breakdown of straight-time and overtime pay. Full Social Security numbers do not go on the weekly transmittal.¹¹

A signed Statement of Compliance accompanies each certified payroll, confirming the records are accurate, every worker was paid the full prevailing wage, and no improper deductions were taken. Electronic submission is fine if the system uses a legally valid electronic signature. Records must be kept for three years after all work on the prime contract is complete.¹¹ The prime is responsible for making sure its subs submit on time.¹²

Penalties for Getting Overtime Wrong

CWHSSA violations carry liquidated damages of $33 per worker per day for each day a covered employee is underpaid overtime. That amount is adjusted periodically for inflation; the $33 figure took effect in January 2025 and applies until the next adjustment.¹³ Damages are assessed on top of the back wages owed. Short ten workers across two weeks and the penalty tally runs into thousands before the underpaid wages are even added in.

The contracting agency can withhold payments from the contract itself to cover unpaid wages and liquidated damages, either on its own or at the Department of Labor’s direction. Underpaid wage claims sit ahead of nearly every other creditor, including IRS tax levies, reprocurement costs, and even a bankruptcy trustee’s claim.¹⁴

The heaviest sanction is debarment. When the Secretary of Labor finds a contractor has disregarded its obligations to workers, that contractor and its responsible officers are barred from all federal and federally assisted contracts for three years.¹⁵ Debarment reaches any firm, corporation, or partnership in which the debarred contractor or officer holds an interest. For a company built around government work, three years off the bid list is often terminal.

1
Office of the Law Revision Counsel. 40 USC 3702 – Overtime Pay Requirement
2
U.S. Department of Labor. Field Operations Handbook – Chapter 15
3
U.S. Department of Labor. Fact Sheet 66B – Interplay Between the DBRA, MSA, and PCA
4
U.S. Department of Labor. Fact Sheet 66 – The Davis-Bacon and Related Acts
5
U.S. Department of Labor. Fact Sheet 66E – Compliance with Fringe Benefit Requirements
6
U.S. Department of Labor. Overtime Pay on DBA/DBRA Contracts
7
Office of the Law Revision Counsel. 40 USC 3701 – Application and Exceptions
8
U.S. Department of Labor. Davis-Bacon and Related Acts Coverage
9
U.S. Department of Labor. Davis-Bacon and Related Acts
10
U.S. Department of Labor. Instructions for Completing Payroll Form WH-347
11
eCFR. 29 CFR 5.5 – Contract Provisions and Related Matters
12
U.S. Department of Labor. Employment Law Guide – Prevailing Wages in Construction Contracts
13
U.S. Department of Labor. Civil Money Penalty Inflation Adjustments
14
U.S. Department of Labor. Investigative Process, Withholding, and Disbursement of Funds
15
eCFR. 29 CFR 5.12 – Debarment Proceedings