Davis-Bacon Wage Classifications and Apprentice Rates, Explained
A Davis-Bacon wage classification is tied to the work actually performed, not a job title or a license. Here's how classifications and classification descriptions work, what the four wage determination types mean, what happens when your work doesn't match a listed classification, and when a worker can legally be paid less than the classification rate as an apprentice.
Where a wage classification actually comes from
A Davis-Bacon wage classification describes a type of work, not a person's job title. "Laborer," "Electrician," "Operator: Crane" and similar entries on a wage determination each carry their own base rate and fringe rate, and the classification a worker falls under for a given day is whatever they actually did that day, not whatever their business card says.
A worker who does electrical work Monday and general labor Tuesday gets paid two different classification rates for those two days, on two separate lines of the WH-347.
The classification descriptions aren't written fresh for your project. They come from standard trade classifications used across Davis-Bacon wage determinations nationally.
A wage determination only lists the classifications relevant to the type of construction it covers.
A few common classification examples, to make this concrete:
Classification
Typically covers
Laborer: Common or General
General site labor not tied to a specific trade skill
Carpenter
Form work, framing, and finish carpentry
Electrician
Wiring, conduit, and electrical systems installation
Operator: Crane
Operating a crane specifically, distinct from other heavy equipment
Ironworker
Structural steel and reinforcing work
The four wage determination types, and why it matters
Davis-Bacon wage determinations are split into four construction types, and each type has its own set of classifications and rates, even for the same trade:
Building: enclosed structures, like offices, schools, and hospitals
Residential: single-family houses and apartment buildings up to four stories
Heavy: large-scale infrastructure that doesn't fit building or highway, like dams, water treatment plants, and pipelines
Highway: roads, streets, bridges, and related paving work
The same job title can have a different rate depending on which of these four types your project falls under. This is also why copying a classification and rate from a past project's wage determination onto a new one is risky: the type, and therefore the rate, may not match.
When your work doesn't match any classification on the wage determination
This comes up more than people expect, especially on specialized or newer types of work. If the work performed genuinely doesn't fit any classification already listed on your wage determination, you can't just pick the closest-sounding one and move on. The process, called a conformance, works like this:
Check the wage determination thoroughly first. Many "missing" classifications are actually listed under a different name than you'd expect. A drywall finisher's work, for example, sometimes falls under "taper" or "painter." A fence erector's work sometimes falls under "laborer" or "ironworker." Conformance is for genuinely uncovered work, not a way to carve a cheaper rate out of an existing one.
If it's genuinely not there, the request goes through Form SF-1444 (Request for Authorization of Additional Classification and Wage Rate), and it has to clear three conditions, all at once:
The work isn't performed by any existing classification on the wage determination.
The classification requested is one actually used in that area by the construction industry, not something invented for the project.
The proposed rate bears a reasonable relationship to the rates already established for similar classifications on that wage determination.
The request routes subcontractor → prime contractor → contracting officer → the Department of Labor's Wage and Hour Division (submitted to DBAConformance@dol.gov). The contractor doesn't submit it directly to DOL.
Pay at least the proposed rate from day one, and note the pending request on your certified payroll. If DOL later sets a higher rate, you owe retroactive back pay for the difference, going back to when the worker started that classification.
Start this after contract award, but before that work begins. Sorting out the correct classification only when an audit asks about it is the wrong order of operations.
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Neither the contractor nor the contracting officer can approve a new classification and rate on their own. Only the Department of Labor can, and only after all three conditions are met.
A pending conformance means paying a proposed rate for weeks, sometimes months, before DOL confirms it, and correcting it retroactively if the final rate differs. Certified Payroll tracks that classification and rate consistently across every week in between, so nothing gets lost between the request and the approval.
Davis-Bacon apprentice rates: when a worker can be paid less than the classification rate
An apprentice can legally be paid less than the full classification rate, but only if all of the following are true:
They're individually registered in a bona fide apprenticeship program, approved by the Department of Labor's Office of Apprenticeship or a recognized state apprenticeship agency.
The percentage they're paid matches that specific program's approved wage schedule for their current step, not a number you look up on the wage determination itself. Programs set their own schedules, and they commonly start well below the full journeyman rate and step up in increments as the apprentice progresses, but the exact percentages vary by trade and by program.
The apprentice-to-journeyman ratio on site stays within what that program allows.
What to have on file
Why
Proof of individual registration
An apprentice rate only applies to that specific worker, not "someone still learning the trade"
Program name and sponsor
Confirms it's a DOL-recognized program, not an informal in-house arrangement
Current step or period
Determines the exact percentage of the journeyman rate they're owed right now
Ratio compliance for the site
Too many apprentices per journeyman on site can invalidate the apprentice rate for the excess workers
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If a worker tells you they're an apprentice but you don't have their registration on file, the safe move is to pay them the full journeyman rate for their classification until you do. "They said they were an apprentice" isn't documentation, and documentation is exactly what an auditor asks for.
Where this shows up on the WH-347
Column 3 needs the exact classification name from your wage determination (or from an approved conformance, if you had to request one), not a shorthand version or your internal job title for the role. An apprentice should appear with their classification clearly marked as an apprentice rate, at the percentage their specific program has them at for that period, matching their registration.
Marking a worker RA and entering their program percentage is one line in a no-signup demo, if you want to see it applied automatically.
Frequently asked
Can I just classify every laborer as "Laborer" to keep the paperwork simple?+
No. The classification has to match the work actually performed that day. A worker doing two different types of work in the same week needs two classification lines, not one averaged or simplified one.
What if I have apprentices but no registered apprenticeship program?+
Then they aren't Davis-Bacon apprentices for pay purposes, regardless of experience level or what your company calls them internally. Pay the full journeyman rate for the classification of work they're doing.
Who decides if a new classification request gets approved?+
The Department of Labor, after the request routes through the prime contractor and contracting officer. Neither the contractor nor the contracting officer can approve one on their own.
Does an apprentice get the full fringe rate too?+
It depends on what the wage determination or the apprenticeship program specifies for fringes at that step. Don't assume it's the same treatment as the base rate without checking.
Does the wage determination type (building, residential, heavy, highway) ever change mid-project?+
No, it's fixed to the contract at award based on the nature of the work. What can change mid-project is the modification number on that same wage determination, which updates the rates.
Certified Payroll keeps classifications and apprentice rates tied to your actual wage determination, so a rate is never carried over from a project, or a wage determination type, it doesn't belong to.