Fringe Benefits on Prevailing Wage Projects: What Contractors Need to Know

Fringe benefits are one of the most misunderstood parts of prevailing wage compliance. Many contractors focus on getting the base hourly rate right and then overlook or miscalculate the fringe benefit obligation — a mistake that can be just as costly as underpaying wages.

Under the Davis-Bacon Act, contractors must pay workers the full prevailing wage rate, which includes both a basic hourly rate and a fringe benefit rate. These are two separate obligations, and failing to meet either one constitutes a violation.

This guide covers everything contractors need to know about fringe benefits on prevailing wage projects: what qualifies, how to calculate your obligation, the cash-in-lieu option, and the most common mistakes that trigger DOL investigations.

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What Are Fringe Benefits Under Davis-Bacon?

The Davis-Bacon Act defines fringe benefits as employer contributions to bona fide benefit plans that provide workers with medical or hospital care, pensions, life insurance, disability benefits, vacation pay, holiday pay, sick leave, and other similar benefits.

Each wage determination published by the Department of Labor specifies both a basic hourly rate and a fringe benefit rate for each worker classification. For example, a wage determination might specify:

In this example, the contractor must ensure the worker receives $42.50/hour in direct wages plus $18.75/hour in fringe benefits (or cash equivalent). Paying only the basic hourly rate without addressing the fringe obligation is a violation, even if the worker does not complain.

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The Four Main Types of Fringe Benefits

Fringe benefits under Davis-Bacon generally fall into four categories. Understanding each one helps you determine whether your current benefit programs satisfy the prevailing wage requirement.

1. Health and Welfare Benefits

This is typically the largest fringe component. It includes employer contributions to:

• Medical insurance (health, dental, vision)
• Hospitalization coverage
• Prescription drug plans
• Life insurance
• Accidental death and dismemberment (AD&D) insurance
• Short-term and long-term disability insurance

To count toward the fringe obligation, these must be provided through a bona fide benefit plan — meaning an established plan with a definite formula for determining contributions and benefits. Simply reimbursing workers for out-of-pocket medical expenses does not qualify.

2. Pension and Retirement

Employer contributions to retirement plans can satisfy part or all of the fringe obligation. Qualifying plans include:

• Defined benefit pension plans
• 401(k) plans (employer contributions only — employee deferrals do not count)
• Profit-sharing plans
• Union pension funds
• Annuity plans

3. Vacation, Holiday, and Sick Leave

Paid time off benefits can count toward the fringe obligation when provided through a bona fide plan. This includes:

• Paid vacation days
• Paid holidays
• Paid sick leave
• Paid personal days

To calculate the hourly value of paid leave, you divide the total annual cost of the benefit by the total hours worked. For example, if a worker receives 10 paid vacation days (80 hours) at a rate of $42.50/hour, the annual cost is $3,400. If the worker works 2,080 hours per year, the hourly fringe credit is $3,400 / 2,080 = $1.63/hour.

4. Training Fund Contributions

Employer contributions to apprenticeship or training programs recognized by the Department of Labor or state apprenticeship agencies can count toward the fringe obligation. This includes:

• Union apprenticeship and training funds
• Industry training programs
• State-approved apprenticeship programs

Training fund contributions are common in unionized construction and can represent a significant portion of the total fringe obligation.

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Cash in Lieu of Fringe Benefits

The Davis-Bacon Act gives contractors the option to pay fringe benefits as cash in lieu of benefits. Instead of providing actual benefit plans, you can add the fringe rate directly to the worker's hourly pay.

Using our electrician example above:

• Option A (Benefits): Pay $42.50/hour in wages + provide $18.75/hour worth of bona fide benefits
• Option B (Cash): Pay $61.25/hour in wages (base + fringe combined)
• Option C (Split): Pay $42.50/hour in wages + provide $10.00/hour in benefits + pay $8.75/hour in cash

All three options are fully compliant. Many contractors, especially smaller ones, choose the cash-in-lieu option because it is simpler to administer. There is no need to set up benefit plans, manage enrollments, or track plan compliance.

When Cash in Lieu Makes Sense

• Small contractors who do not have established benefit plans
• Short-term projects where setting up benefits is impractical
• Mixed workforce where some workers are on prevailing wage projects and others are not
• Non-union contractors who do not have existing fund contribution agreements

When Bona Fide Benefits Make Sense

• Union contractors who already contribute to union benefit funds
• Larger contractors with established health insurance and retirement plans
• Contractors doing frequent government work who benefit from the tax advantages of fringe plans
• Employers who want to attract and retain workers through comprehensive benefits

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How to Calculate Your Fringe Benefit Obligation

Calculating fringe benefits correctly requires careful accounting. Here is the step-by-step process:

Step 1: Identify the Required Fringe Rate

Look at the applicable wage determination for your project. Find the worker's classification and note the fringe benefit rate. This is expressed as an hourly amount.

Step 2: Inventory Your Current Benefits

List every benefit you currently provide to the worker and calculate the hourly cost of each. For benefits paid on a per-hour basis (like union fund contributions), the calculation is straightforward. For benefits paid monthly or annually, divide by the expected annual hours worked.

Step 3: Calculate the Hourly Value of Each Benefit

Step 4: Determine the Gap

Subtract the value of benefits you provide from the required fringe rate:

$18.75 (required) - $6.66 (provided) = $12.09/hour shortfall

You must make up this difference, either by providing additional benefits or by paying $12.09/hour in cash in lieu.

Step 5: Document Everything

Maintain records of every benefit plan, contribution rate, and calculation. The DOL can request documentation at any time, and clear records are your best defense during an audit.

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Common Fringe Benefit Mistakes

These are the errors we see most frequently — and the ones that trigger DOL enforcement actions:

Mistake 1: Ignoring the Fringe Obligation Entirely

Some contractors pay the basic hourly rate and assume that is sufficient. It is not. The fringe benefit rate is a separate, mandatory obligation. Ignoring it means you are underpaying workers by the full fringe amount — potentially $15-25+ per hour.

Mistake 2: Counting Employee Contributions as Employer Fringe

Only the employer's portion of benefit costs counts toward the fringe obligation. If a worker pays $200/month toward their health insurance premium, that $200 is not part of the employer's fringe credit.

Mistake 3: Using Benefits That Are Not Bona Fide

To qualify as a bona fide fringe benefit, a plan must meet specific DOL requirements. Ad hoc reimbursements, gift cards, or informal arrangements do not qualify. The benefit must be provided through an established plan or program with a definite formula.

Mistake 4: Not Adjusting for Classification Changes

Different worker classifications have different fringe rates. If a worker performs work under multiple classifications during a week (for example, electrician work on Monday-Wednesday and general labor on Thursday-Friday), the fringe obligation must be calculated separately for each classification.

Mistake 5: Failing to Pay Fringe on Overtime Hours

The fringe benefit obligation applies to every hour worked, including overtime hours. While the base rate must be paid at 1.5x for overtime, the fringe rate is paid at the straight-time rate for all hours (both regular and overtime). This distinction trips up many contractors.

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Reporting Fringe Benefits on the WH-347

The WH-347 form has specific columns for reporting fringe benefits. Getting this right is critical because auditors review these columns carefully.

Column 6: Rate of Pay

Column 6 is split into two parts:

• Column 6A: The basic hourly rate (excluding fringe). Using our example: $42.50
• Column 6B: The fringe benefit amount. This is where you report how you are meeting the fringe obligation.

How to Fill In Column 6B

In Column 6B, you enter the hourly fringe rate. If you are paying all fringe as cash in lieu, enter the full fringe amount ($18.75 in our example). If you are providing benefits through a bona fide plan, enter the hourly value of those benefits.

If you are using a combination (some benefits + some cash), enter the total hourly value of benefits plus cash that makes up the full fringe rate.

The Statement of Compliance (Page 2)

On the second page of the WH-347, the Statement of Compliance asks you to check a box indicating how fringe benefits are being paid:

• Box 4(a): All fringe benefits are paid to approved plans, funds, or programs
• Box 4(b): All fringe benefits are paid as cash in lieu
• Box 4(c): Fringe benefits are paid partially in cash and partially to approved plans (explain in the remarks section)

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Bona Fide Benefit Plans vs. Cash Payments: A Comparison

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State-Specific Fringe Requirements

Federal Davis-Bacon fringe requirements apply to all federally funded projects. But many states also have their own prevailing wage laws (sometimes called "little Davis-Bacon" acts) with their own fringe benefit requirements.

State fringe requirements can differ from federal requirements in several ways:

• Different fringe rates: State prevailing wage determinations may specify different fringe amounts than federal determinations
• Different qualifying benefits: Some states have stricter definitions of what constitutes a bona fide benefit
• Additional reporting: Some states require separate certified payroll forms with their own fringe reporting fields
• Stricter cash-in-lieu rules: A few states limit or restrict the cash-in-lieu option

States with notable prevailing wage laws that include fringe requirements include California, New York, Massachusetts, Illinois, Michigan, Ohio, New Jersey, and Washington. Each has its own nuances that contractors working in those states must understand.

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How CertifiedPayrollPro Handles Fringe Benefits

CertifiedPayrollPro automates the most error-prone parts of fringe benefit compliance:

• Automatic fringe calculations: Enter your benefit plan details once, and the system calculates hourly fringe credits for every worker on every report
• Gap detection: The platform flags when your benefits do not fully satisfy the fringe obligation, so you know exactly how much cash-in-lieu to add
• WH-347 auto-fill: Column 6B and the Statement of Compliance checkboxes are filled correctly based on your configuration
• Multi-classification support: Workers performing under multiple classifications get the correct fringe calculation for each set of hours
• Compliance assistant: Lydia can answer specific fringe benefit questions and explain calculations step by step

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This guide is for informational purposes only and does not constitute legal advice. Fringe benefit requirements can vary by project, location, and applicable wage determination. Always consult with a compliance professional for project-specific questions. Last updated: March 2026.