Prevailing Wage Guide for California Contractors

Any contractor working on public works projects in California must comply with prevailing wage requirements. These mandates apply to construction, alteration, demolition, installation, and repair work paid for with public funds. Understanding these rules is not optional — violations carry severe penalties including debarment from future public work.

What Are Prevailing Wages?

Prevailing wages are the hourly rates (including fringe benefits) that the Director of Industrial Relations determines to be standard for a specific trade in a specific county. These rates typically match or exceed union scale wages.

Each trade classification — journeyman carpenter, electrician, plumber, HVAC mechanic — has its own prevailing wage rate that varies by county. Riverside County rates differ from Los Angeles County rates, so you must verify rates for each project location.

Who Must Comply?

Any contractor or subcontractor performing work on a public works project exceeding $1,000 (construction) or $15,000 (maintenance) must pay prevailing wages. This applies regardless of whether your company is union or non-union.

Private projects can also trigger prevailing wage requirements if they receive public funding, tax credits, or other government subsidies. Always verify the project funding structure before bidding.

Certified Payroll Requirements

Contractors must submit certified payroll records (CPRs) for every worker on a prevailing wage project. These records document hours worked, classifications, wages paid, and fringe benefits. Records must be submitted electronically through the DIR's eCPR system.

Accuracy is critical. Misclassifying workers or underreporting hours can result in penalties of $200 per violation per day, plus back wages owed to affected workers.

DIR Registration

Before bidding on any public works project, your company must be registered with the Department of Industrial Relations (DIR). This registration must remain active for the entire duration of the project.

Registration is annual and requires proof of workers' compensation insurance. Subcontractors at every tier must also maintain current DIR registration.

Practical Compliance Tips

Designate a prevailing wage compliance officer within your company — someone who tracks rate changes, manages certified payrolls, and ensures proper worker classifications. Invest in payroll software that handles prevailing wage calculations automatically.

Build prevailing wage costs into your bids from the start. Too many contractors underbid public projects by using standard wage rates, then face margin compression when prevailing wage requirements kick in.