Who Sets the Prevailing Wage on a Federal Job, and How They Do It

If you take a job wiring a federal courthouse, a VA hospital, or a grant-funded wastewater plant, your hourly rate is not set only by you and your contractor. Federal law puts a floor under it called the prevailing wage. The question most new electricians ask is where that number comes from and who decides it.

The Wage and Hour Division of the U.S. Department of Labor decides it. Under the Davis-Bacon Act, federal and District of Columbia construction contracts over $2,000 must pay laborers and mechanics at least the locally prevailing rate, and related acts extend the rule to many projects funded with federal grants and loans. The division surveys what contractors actually pay on similar projects in the same area, one classification at a time. A rate prevails if more than half of surveyed workers earn it. If no rate reaches a majority, the rate paid to the largest group prevails, as long as that group is at least 30 percent. Only when both tests fail does the division use a weighted average. The 30 percent step was restored by a rule effective October 23, 2023.

The results are published as wage determinations on SAM.gov, the official source since June 14, 2019. General wage determinations cover most counties for each broad type of construction, such as building, heavy, and highway, and list a base hourly rate and a fringe benefit rate for each craft. An electrician line with an ELEC identifier reflects a union-negotiated rate; a line marked SU was derived from survey data on non-union pay. On a sealed bid, the determination generally locks at bid opening, and modifications issued after award generally do not apply. If the work needs a classification the determination does not list, the contractor files a conformance request proposing a rate that bears a reasonable relationship to the listed ones.

For your paycheck, the fringe figure matters as much as the base. A contractor can meet the obligation entirely in cash or through a mix of cash and bona fide benefits such as health insurance, pension, and vacation. Covered workers must be paid weekly, and the contractor submits certified payroll to the contracting agency every week, which is why public-work employers are strict about classifications and hour records. Apprentices can be paid below the listed rate only if they are individually registered in a program approved by DOL or a state apprenticeship agency and the program's ratios are respected. A helper who is called an apprentice but is not registered is owed the full rate.

The common misconception is that prevailing wage simply means the union rate. It does when union pay is what the majority, or the largest group of at least 30 percent, earns in that county. Where it is not, the published rate reflects surveyed non-union pay or a weighted average. Davis-Bacon is also not the only rule in play: many states and cities run their own prevailing wage laws, and one project can be covered by both.

To see the real number, pull the current determination for your county on SAM.gov and compare the electrician line, base plus fringe, with the offers in front of you. For how public-work rates stack up against private commercial pay, read the AmpScouts Commercial Electrician Salary Guide.