WRONG WORKER CLASSIFICATION IS YOUR #1 PREVAILING WAGE RISK.
Prevailing wage worker classification errors are the most common compliance violation for subcontractors doing public work across the civil, electrical, plumbing, mechanical, and masonry trades. The main mistakes are applying the wrong trade classification to the work performed, failing to pay the full fringe benefit rate for each classification, running one overhead rate for both public and private bids, and filing certified payroll with incorrect classification data. Back wage liability reaches back to the first day of the error, which can cover an entire project.
The reason this one gets missed is that nobody in the field treats it as a money problem. A foreman puts an electrician on formwork for half a day because that's who was free, and the certified payroll says electrician because that's what the man does for a living. Two years later a Wage and Hour reviewer reads the same timecard and reads it differently. The back wages are owed for every hour, for every worker with the same error, and the check comes out of a job you closed a long time ago.
WHAT IT MEANS.
Prevailing wage worker classification is the trade category a worker gets paid under on a public job, set by the type of work performed that day rather than by the worker's usual trade.
Classification follows the work, not the worker's primary trade. That one rule is where most of this starts and ends. A journeyman who spends two hours on his own trade and four hours on general labor has two classification entries on that day's certified payroll, and the wage determination sets the rate for each one.
WHERE CLASSIFICATION GOES WRONG.
Using the wrong trade classification
Prevailing wage classification depends on the type of work performed, not on the worker's primary trade or standard pay rate. An electrician doing concrete formwork on a prevailing wage job has to be classified as a laborer or a carpenter for those hours, not as an electrician. If the electrician rate is the higher of the two, using it overpays the job. If the laborer rate is higher, the underpayment creates liability that grows every week nobody catches it.
Not paying the full fringe benefit rate
Prevailing wage rates cover base wages plus fringe benefits, meaning health and welfare, pension, and apprenticeship training fund contributions. Paying the correct base wage while underpaying fringe creates back wage liability equal to the fringe shortfall for every hour worked on the project. Most fringe underpayments come from using a rate off an older wage determination or off a determination written for a different project location.
One overhead rate for both public and private work
Prevailing wage work carries a heavier labor burden, because fringe benefits add $12 to $22 per hour on top of base wages and private work doesn't have that cost at all. A contractor using one blended overhead rate underprices prevailing wage work by the fringe difference on every public bid. Two overhead rates, one for each type of work, is what accurate bid pricing on both requires.
WHAT IT LOOKS LIKE IN DOLLARS.
Back wages equal the difference between what was paid and what the correct prevailing wage rate required, for every hour of misclassified work. If a worker was paid $38/hour as an apprentice and the work performed required the $48/hour journeyman rate, the back wage is $10/hour times all hours worked at the wrong classification, times every worker carrying the same error. A four month run on a six man crew isn't a rounding item.
A verified civil client doing $6.7M in revenue ran 35% of that revenue on DOT prevailing wage work, bid all of it off a single blended overhead rate, and assembled certified payroll manually from timesheets. A pre-audit review found two classification errors, one of which had been running for 4 months. Both were corrected before any compliance audit, so the back wage exposure never became a formal claim, and the line of credit went from $348,000 to $0 in 60 days once the billing structure and the separate prevailing wage overhead rate were corrected.
HOW TO FIX CLASSIFICATION.
Each worker's classification on a prevailing wage project is set by the work they perform each day, not by their regular trade classification. A journeyman electrician who spends two hours on electrical work and four hours on general labor gets two separate classification entries in that day's certified payroll. The wage determination gives the rate for each classification, and the payroll has to reflect the work that got done.
Prevailing wage rates update periodically. Federal Davis-Bacon rates are published on SAM.gov, and state prevailing wages are published by the applicable state agency. Using a rate that was current 18 months ago and has gone up since means the labor cost in the bid is wrong before the job starts. Pull the current determination out of the bid documents on every prevailing wage bid.
SPM builds prevailing wage project cost codes in ControlQore by worker classification: journeyman, apprentice by year, laborer, operator, and foreman. When time is entered for a prevailing wage project, the worker selects the classification that matches the work performed that day. The certified payroll report is generated out of that classification time entry data instead of being assembled manually from payroll timesheets.
Certified payroll submissions are built and filed separately from regular payroll processing. SPM produces the certified payroll report from ControlQore data weekly for each prevailing wage project, and the report is reviewed for classification accuracy before it goes out. Corrections get made before filing rather than after a compliance audit finds them.
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| Last 12 months revenue | Monthly fee |
|---|---|
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| $1M to $3.5M | $2,600 to $3,900 |
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| $6.5M to $9.5M | $5,100 to $7,100 |
| $9.5M to $12.5M | $6,100 to $8,500 |
| $12.5M to $15.5M | $7,400 to $11,000 |
| $15.5M to $18.5M | $9,400 to $13,500 |
| $18.5M+ | Quoted individually |
Range reflects the three tiers below. Which one you're in depends on how much of the work you want off your desk. No payroll. No hidden line items.
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