The classification for the work the worker actually performed, as the wage determination in your contract names it. A worker who did two kinds of work gets a row for each, with the hours split between them and each paid at least that classification's rate. If the determination has no classification for work someone performed, contact the Contracting Officer or agency representative immediately.
Watch out: Without an accurate breakdown of hours by classification, all of the worker's hours are owed at the highest applicable rate, basic plus fringe (the DOL instructions; 29 CFR 5.5(a)(1)(i)). Box 3 on page 2 certifies the classifications are the work actually performed.
Go deeper
This answer is one paragraph of a longer page, which has the context around it and the rest of the form or the week.
Column 3Sources, pulled on 2026-10-02
Every rule on this page comes from one of these, pulled from the government site on the date shown and written against that text. Open them; they are the authority, not us.
- 29 CFR 5.5, Davis-Bacon contract clauses (records, certified payrolls, Statement of Compliance)
eCFR. eCFR up to date as of 10/01/2026; last amended 90 FR 1859, Jan. 10, 2025. Pulled 2026-10-02.
- Instructions for completing Form WH-347
DOL Wage and Hour Division. For the January 2025 form; pulled from the live page (no revision date shown). Pulled 2026-10-02.
Other quick answers
- Is certified payroll the same as the WH-347?
- Do I file certified payroll for a week when nobody worked on the project?
- What do I do if a certified payroll I already sent is wrong?
- Does the state want its own certified payroll too?
- What goes in the certified payroll number and header of the WH-347?
- Does the WH-347 need each worker's full Social Security number?