The difference between Davis-Bacon and the McNamara-O’Hara Service Contract Act (SCA) determines how workers must be paid, how payroll is reported, and which compliance rules apply to a project. For payroll teams, confusing the two can lead to misclassification, underpaid wages, rejected invoices, and audit findings.
The key difference between Davis-Bacon and the Service Contract Act is the type of work covered.
Each law has its own wage rules, classifications, and reporting expectations.
The Davis-Bacon Act requires contractors on covered construction projects to pay workers no less than the prevailing wage set by the U.S. Department of Labor.
Key Davis-Bacon requirements include:
Davis-Bacon applies when a federal construction contract exceeds $2,000.
The Service Contract Act applies to federal contracts where the primary purpose is to provide services, not construction.
Key Service Contract Act requirements include:
SCA generally applies to service contracts exceeding $2,500.
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Payroll teams must determine which law applies before payroll runs, not after an audit.
Misapplying Davis-Bacon or the Service Contract Act can result in:
Mixed-scope projects are especially risky. Some contracts include both construction and service components, each governed by different rules.
Identify whether the primary work is construction or service based.
Construction uses Davis-Bacon wage determinations. Service work uses SCA wage determinations.
Do not rely on job titles. Classification must match the work performed.
If a project includes both construction and service work, payroll must reflect each law correctly.
Keep wage determinations, classifications, and payroll records available for inspection.
These mistakes usually stem from contract review gaps, not payroll calculation errors.
If your team handles federal projects, your next steps should be:
Many payroll teams use construction-specific payroll platforms like eBacon to manage prevailing wage rules, classifications, and reporting across both Davis-Bacon and service-related work without manual rework.
The difference between Davis-Bacon and the Service Contract Act comes down to construction versus service work, but the payroll impact is significant.
Knowing which law applies protects payroll accuracy, compliance standing, and contract payments. Clear contract review and classification discipline prevent costly corrections later.
See how eBacon simplifies prevailing wage and federal contract payroll. Book a quick demo.
Davis-Bacon applies to construction work, while the Service Contract Act applies to service work on federal contracts.
Yes. Some contracts include both construction and service components, requiring separate payroll handling.
No. Certified payroll reporting is specific to Davis-Bacon covered construction projects.
Both laws are enforced by the U.S. Department of Labor through the Wage and Hour Division.
The material presented here is educational in nature and is not intended to be, nor should be relied upon, as legal or financial advice. Please consult with an attorney or financial professional for advice.