How to Calculate Fringe Benefits for Certified Payroll

To calculate fringe benefits for certified payroll under the Davis-Bacon Act, divide the annual employer cost of each qualifying benefit by the total hours the worker performed across all jobs that year, then compare that hourly figure to the fringe rate listed in your project’s wage determination. If your hourly benefit value meets or exceeds the required rate, you’re covered. If it falls short, you owe the difference in cash for every hour the worker spent on the covered project.¹

The rule applies on federal construction contracts over $2,000, and it treats the fringe amount as a separate obligation from the base cash wage. Paying more than the base rate in cash does not cure a fringe shortfall, and providing more in benefits than the fringe rate requires does not let you reduce the base cash wage.

Finding the Required Fringe Rate

The wage determination attached to your contract lists a base hourly rate and a fringe rate for every trade classification on the project. A line might read “Electrician — $38.50/hr + $15.20 fringe.” The $15.20 is the number your hourly benefit value has to match. Contracting officers pull these determinations from the Wage Determinations at SAM.gov site.²

The Annualization Calculation

The core formula is a single division: annual employer cost of the benefit ÷ total annual hours worked (federal and private combined) = hourly credit.³ This is called annualization, and it exists to stop contractors from loading a year’s worth of benefit cost onto the hours a worker happened to log on federal projects.

A worked example. You pay $6,000 a year for a worker’s health insurance. That worker logs 2,000 total hours across all jobs during the year. The hourly credit is $3.00 ($6,000 ÷ 2,000). If the wage determination requires $7.50 in fringes, you’re $4.50 short and owe that amount in cash for every Davis-Bacon hour. Change the total hours to 1,200 with the same premium, and the credit rises to $5.00, cutting the shortfall to $2.50.

Run the calculation worker by worker. Contribution amounts differ, hours differ, and the credit changes with them. Add up the hourly credits from every qualifying benefit for that worker to get the total hourly fringe value.

What Counts Toward the Fringe Rate

Only certain benefits are creditable. The categories recognized under the regulations are health, hospital, dental, and vision insurance premiums; retirement contributions, including 401(k) employer matches; life and disability insurance premiums; vacation and holiday pay; apprenticeship or similar training program costs; and accident, sickness, or unemployment benefit plans that go beyond what the law already requires.⁴

A benefit also has to be structured correctly. The plan must be legally enforceable and communicated to workers in writing. For funded plans, contributions must go to a trustee or unrelated third party at least quarterly.⁵

What Does Not Count

Payments that are already required by other laws do not count. That means employer-paid Social Security taxes, workers’ compensation insurance, and state unemployment insurance are excluded from your fringe credit.⁶ Claiming credit for these is one of the fastest ways to end up with a back-wage liability during a Wage and Hour Division audit.

Your administrative costs for running benefit plans are also out. Claim filing, invoice tracking, recordkeeping, tax document distribution, and the fees of a third-party administrator are business overhead, not fringe benefits.⁷ The Department of Labor also treats the cost of your own Davis-Bacon compliance tracking as administrative expense.

The Per-Hour Pension Exception

Annualization has one significant carve-out. If you contribute to a defined contribution pension plan on a per-hour-worked basis, and the plan provides for immediate participation with vesting inside 500 hours, the per-hour contribution counts at face value.³ Contribute $5.00 an hour to a qualifying plan and you take a $5.00 credit. No division by total hours.

For other benefit types, you can request an exception from the Wage and Hour Division, but the benefit cannot be continuous in nature and cannot compensate both private and Davis-Bacon work in the same period.

Unfunded Vacation and Holiday Pay

Vacation and holiday pay often come out of a contractor’s general funds rather than a separate trust. The math is the same, but there’s an extra step: you have to get the plan approved by the Department of Labor before you can take any credit for it.⁶ Approval requests go to the Division of Government Contracts Enforcement and must show that the plan is legally enforceable, financially responsible, and communicated in writing to workers. You can submit by email to unfunded@dol.gov or by mail. Without an approval on file, unfunded vacation and holiday pay does not reduce your fringe obligation.

Reporting the Hourly Credit on Form WH-347

Certified payroll is due each week Davis-Bacon work is performed.⁸ Most contractors use Department of Labor Form WH-347, though other formats are allowed if they include the required data.⁹ The form has a fringe benefits column where you enter the hourly credit for each worker, including both plan contributions and any cash paid to close the gap.

The Statement of Compliance on page two, signed under penalty of perjury, has three boxes for how you’re meeting the obligation. Box 4(a) means everything is paid to approved plans, funds, or programs. Box 4(b) means the full fringe is paid to workers as cash. Box 4(c) covers a mix of the two. Box 4(c) is the most common choice, because benefit packages rarely land exactly on the wage determination’s fringe figure.

How the Credit Affects Overtime

Overtime kicks in at time-and-a-half after 40 hours in a workweek, and fringe amounts get special treatment in the calculation. Employer contributions to bona fide fringe benefit plans can be excluded from the regular rate used to compute overtime, so long as excluding them does not drop the regular rate below the base cash rate in the wage determination.¹⁰

Cash paid in lieu of fringe benefits follows the same rule. If the determination requires $4.00 in fringes and you pay that $4.00 as cash instead of routing it to a plan, you can still exclude it from the overtime regular rate.¹¹ Cash that is simply part of straight-time wages, rather than a substitute for a specific fringe, stays in the regular rate and drives the overtime premium up. Employee contributions taken out of a paycheck are never excludable; overtime is computed on earnings before any employee-side deductions.

Apprentices

If your workers include registered apprentices, the fringe number they’re owed comes from their apprenticeship program, not automatically from the journeyworker line on the wage determination.⁵ If the program is silent on fringes, the apprentice gets the full journeyworker fringe rate. The apprentice fringe rate also only applies while the job site meets the program’s required ratio of journeyworkers to apprentices. If the ratio is off, each affected apprentice may be owed the full journeyworker fringe.

What a Miscalculation Costs

Getting the number wrong triggers back wages. The Wage and Hour Division requires the contractor to pay the difference between what workers received and what they were owed, and the contracting agency can withhold contract funds to cover it. Overtime violations under the Contract Work Hours and Safety Standards Act add liquidated damages of $33 per calendar day for each worker who worked over 40 hours without proper overtime pay.¹² Because the Statement of Compliance is signed under penalty of perjury, a good-faith math error is a compliance problem, but knowingly submitting false fringe figures moves the exposure into criminal and False Claims Act territory. Keep the arithmetic honest, the inputs documented, and the excluded items out of the calculation.

1
U.S. Department of Labor. Davis-Bacon and Related Acts
2
Acquisition.gov. FAR 22.1008-1 Obtaining Wage Determinations
3
eCFR. 29 CFR 5.25 Rate of Contribution or Cost for Fringe Benefits
4
eCFR. 29 CFR 5.29 Specific Fringe Benefits
5
U.S. Department of Labor. Fact Sheet 66E The Davis-Bacon and Related Acts Compliance with Fringe Benefit Requirements
6
eCFR. 29 CFR Part 5 Subpart B Interpretation of the Fringe Benefits Provisions of the Davis-Bacon Act
7
eCFR. 29 CFR 5.33 Administrative Expenses of a Contractor or Subcontractor
8
eCFR. 29 CFR 5.5 Contract Provisions and Related Matters
9
U.S. Department of Labor. Form WH-347
10
eCFR. 29 CFR 5.32 Overtime Payments
11
eCFR. 29 CFR 4.182 Overtime Pay of Service Employees Entitled to Fringe Benefits
12
eCFR. 29 CFR 5.8 Liquidated Damages under the Contract Work Hours and Safety Standards Act