How Certified Payroll Works
Learn how certified payroll works on public works projects, what data must be reported weekly, and how contractors reduce compliance risk.
Last updated: May 2026
Certified payroll is a reporting requirement tied to labor standards on many government-funded projects. It is not only about paying people on time. It requires weekly, worker-level documentation showing that every laborer was paid correctly for their classification and location.
If your company handles public works, this guide explains the operational workflow from time collection to submission, common failure points, and where payroll software helps. For broader payroll evaluation, see our best payroll software and payroll comparisons.
What Certified Payroll Is
The compliance layer on top of payroll.
Certified payroll is a weekly submission that documents wages paid on covered public jobs. The most common format is WH-347 plus a signed statement of compliance. Agencies use it to verify that workers received at least required wage and fringe amounts under project labor standards.
Typical fields include worker name/ID, classification, daily and weekly hours, base wage, fringe treatment, gross pay, deductions, and net pay.
Certified Payroll Workflow
How operations teams run it week to week.
- Capture project-level time daily so each hour is tied to the right contract and classification.
- Validate wage determination rates before payroll close, including county and labor class differences.
- Run payroll and fringe calculations with documented deduction logic and overtime handling.
- Generate and review WH-347 output for missing classifications, rate mismatches, and hour anomalies.
- Submit before agency deadlines and retain an audit-ready copy with supporting timesheets.
What Data You Need Weekly
Data quality determines compliance outcomes.
Teams that pass compliance reviews consistently track these fields well:
- Worker classification by task performed, not only by job title.
- Daily hours, split by straight-time and overtime.
- Prevailing wage and fringe treatment for each classification.
- Deductions with documentation that matches policy and agreements.
Missing these details usually causes rejected submissions and payment delays. This is where integrated time + payroll systems have real operational value, especially compared to manual spreadsheet assembly.
How Payroll Software Helps With Certified Payroll
Where software reduces risk and rework.
Software can materially improve certified payroll operations by:
- Linking time entries to jobs and classifications before payroll runs.
- Applying pay rules consistently across crews and projects.
- Producing cleaner reports for WH-347 preparation and review.
- Maintaining historical records for audits and back-wage investigations.
Compare platforms with construction-heavy payroll needs in our construction payroll guide and specific reviews like QuickBooks Payroll and ADP.
Common Certified Payroll Mistakes
Where contractors usually get flagged.
- Using one classification for all hours on mixed-scope work.
- Applying outdated wage determinations after project updates.
- Fringe benefit math that does not reconcile to policy and payroll.
- Late weekly submissions that hold up draw requests or pay apps.
Teams with recurring issues should standardize approval workflows and pre-submission checks before signing the weekly compliance statement.
FAQs
Quick answers for owners and payroll admins.