Certified Payroll vs. Union Payroll: Know the Difference Before It Costs You

The WH-347 was late.

The fringe rate was wrong.

The GC flagged it.

That's a $40,000 problem on a job you already bid too tight.

This scenario plays out more often than anyone in the trades wants to admit. And in almost every case, the root cause is the same: a union contractor running a public job treated certified payroll vs. union payroll as one process, managed by one person, through one system.

They're not.

They never were.

And the gap between them is exactly where compliance risk lives. ---

Certified Payroll vs. Union Payroll: TWO OBLIGATIONS. ZERO OVERLAP.

If you're a union contractor working public jobs in New York, New Jersey, or Pennsylvania, you are legally obligated to manage both. They share some data — worker names, hours, wages — but the requirements, reporting cadences, and consequences for errors are entirely different.

CERTIFIED PAYROLL

- Required on all prevailing wage / public work contracts

- Governed by the Davis-Bacon Act (federal) and state equivalents

- Requires weekly WH-347 submission to GC or contracting agency

- Wage rates set by published wage determinations per trade

- Non-compliance triggers DOL investigation and back-pay orders

- Persistent violations can result in debarment from public work

UNION PAYROLL

- Required for all workers covered under a Collective Bargaining Agreement

- Governed by your specific CBA — not federal wage schedules

- Requires accurate fringe benefit contributions per trade classification

- Pension, health, annuity, and training fund contributions tracked separately

- Non-compliance triggers union grievances and fund audits

- Errors compound — underpayments accrue interest and penalties

IMPORTANT: Prevailing wage rates and union CBA rates are not always the same. On some jobs, the CBA rate exceeds the prevailing wage determination — and you must pay the higher of the two. Miss that distinction and you're underpaying your workers and out of compliance simultaneously. ---

WHAT A 50-EMPLOYEE UNION SHOP ACTUALLY LOOKS LIKE ON A PUBLIC JOB

Let's make this concrete. Fifty workers on site — electricians, laborers, ironworkers. The job is prevailing wage. Your crew is unionized.

Every single week you are managing:

• Multiple wage rates per trade classification — electricians, laborers, and ironworkers each carry different prevailing wage determinations, and those rates can differ by county in NY, NJ, and PA

• Union fringe benefit contributions tracked per CBA — health fund, pension, annuity, and training contributions calculated separately for each classification, remitted to the correct union funds on time

• Weekly WH-347 certified payroll reports prepared accurately and submitted to the GC or contracting agency before the deadline — every week, without exception • Workers' comp classifications that can shift mid-project as workers move between tasks, creating liability if not tracked and updated in real time

• State-specific prevailing wage compliance across NY, NJ, or PA — each state has its own prevailing wage law, its own wage schedules, and its own enforcement posture One miscalculation — a wrong fringe rate, a missed wage determination, a late WH-347 — and you're facing back-pay liability, a DOL inquiry, or a debarment risk that could cost you far more than the contract was ever worth. ---

THE 5 MOST COMMON CERTIFIED PAYROLL MISTAKES UNION CONTRACTORS MAKE

1. USING THE WRONG WAGE RATE Prevailing wage determinations are published per trade, per county, and updated periodically. Using last year's rate — or the wrong county's rate — results in underpayment that triggers back-pay orders. This is the single most common audit finding in NY, NJ, and PA.

2. MISCOUNTING FRINGE BENEFITS TOWARD PREVAILING WAGE Employers can credit bona fide fringe benefits toward the prevailing wage fringe requirement — but only if those benefits meet specific criteria. Most contractors either overcredit or undercredit, creating liability in both directions.

3. LATE OR INCOMPLETE WH-347 SUBMISSIONS Certified payroll reports must be submitted weekly for every week work is performed — including weeks with no work. Late or missing reports are immediate red flags for GCs and contracting agencies, and repeated issues can get you removed from a job.

4. MISCLASSIFYING WORKERS A laborer performing work typically done by a tradesperson must be paid the tradesperson's wage rate. Misclassification — intentional or not — is one of the most aggressively pursued violations in prevailing wage enforcement.

5. TREATING UNION REMITTANCES AS AN AFTERTHOUGHT Union fringe contributions are not optional and they are not flexible. Late remittances accrue interest. Underpayments trigger fund audits. And union grievances over benefit shortfalls create labor relations problems that extend well beyond any single job. ---

HOW MY CONSTRUCTION PAYROLL RUNS BOTH — SO YOU DON'T HAVE TO

My Construction Payroll is a specialized payroll and PEO service built exclusively for construction contractors across New York, New Jersey, and Pennsylvania. We don't serve restaurants, retailers, or tech companies. We serve contractors — and we understand the difference between a WH-347 and a fringe remittance report because this is all we do.

CERTIFIED PAYROLL — MCP HANDLES:

✓ Prevailing wage rate verification per trade and county

✓ WH-347 preparation and weekly submission

✓ NY, NJ and PA state-specific compliance

✓ Worker classification review and documentation

✓ Audit-ready certified payroll records on demand

UNION PAYROLL — MCP HANDLES:

✓ CBA-specific fringe benefit calculations per classification

✓ Pension, health, annuity and training fund contributions

✓ Multi-trade classification management across one job

✓ Timely remittance reporting to union funds

✓ Fringe benefit credit analysis against prevailing wage

Both payrolls. Every week. Accurately. And when a DOL inquiry comes or a GC asks for documentation, you have everything ready — because we built it that way from day one. -

FREQUENTLY ASKED QUESTIONS

Q: Do I need certified payroll if I'm already running union payroll?

A: Yes. If your job is publicly funded — federal, state, or municipal — certified payroll reporting is required regardless of your union status. Union payroll satisfies your CBA obligations. Certified payroll satisfies your prevailing wage reporting obligations. They are separate compliance requirements.

Q: What happens if I miss a WH-347 submission?

A: Missing or late certified payroll submissions are contract violations. Your GC can withhold payment until reports are received. Persistent non-compliance can trigger a DOL investigation, back-pay orders, and in serious cases, debarment from public work contracts in that state.

Q: Can my union fringe benefits count toward the prevailing wage fringe requirement?

A: Yes, but only if they qualify as bona fide fringe benefits under the Davis-Bacon Act. The calculation is nuanced — you must determine the hourly equivalent of each benefit and compare it against the published fringe determination. Overestimating the credit is a common audit trigger.

Q: Does prevailing wage law differ between NY, NJ, and PA?

A: Significantly. New York has some of the strictest prevailing wage enforcement in the country. New Jersey's Wage and Hour Division actively audits public contracts. Pennsylvania operates under its own Prevailing Wage Act with distinct wage schedules and enforcement procedures. A contractor working across state lines needs state-specific expertise for each jurisdiction. ---

15 MINUTES. ZERO OBLIGATION.

Book a strategy call with our team. We'll review your current payroll setup, identify your compliance gaps, and show you exactly how MCP takes this off your plate — starting this week.

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