Construction Industry Payroll Guide: Prevailing Wage, Certified Payroll & More

Construction payroll is among the most complex in any industry. Between prevailing wage laws, union agreements, multi-state work, and job-cost tracking, errors are expensive and audits are common. This guide covers the essentials.

Prevailing Wage Laws

Davis-Bacon Act (Federal)

Applies to federal construction contracts over $2,000. Requirements:

• Pay the locally prevailing wage for each trade and occupation
• Pay the prevailing fringe benefit rate (can include bona fide benefits or cash)
• Post the applicable wage determination at the job site
• Submit Certified Payroll Reports (WH-347) weekly

State "Little Davis-Bacon" Laws

More than 30 states have their own prevailing wage laws for state-funded projects. Thresholds and covered trades vary by state.

How Prevailing Wages Are Determined

The Department of Labor surveys contractors in a geographic area to establish prevailing wage rates by classification. Rates are updated periodically and published on the DOL website.

Important: Fringe benefits paid to employees (health insurance, retirement contributions, vacation) can be credited toward the required fringe benefit rate. This is a significant opportunity to optimize cash flow.

Certified Payroll Reporting

For Davis-Bacon and most state prevailing wage projects, you must submit weekly certified payrolls showing:

• Employee name, address, Social Security Number (or last 4 digits)
• Work classification
• Hours worked each day (regular and overtime)
• Wage rate paid
• Fringe benefits paid/provided
• Deductions
• Net wages paid

A signed Statement of Compliance certifies the accuracy of the report under penalty of law. False statements can result in criminal charges.

Most states now require electronic submission through Labor Compliance software or the LCPtracker/DIR portals.

Trade Classifications and Wage Rates

Common construction classifications:

• Carpenter
• Cement Mason
• Electrician (Commercial vs. Residential)
• Iron Worker
• Laborer (multiple sub-classifications)
• Operating Engineer (equipment type matters)
• Painter
• Plumber
• Roofer
• Sheet Metal Worker
• Truck Driver

Assigning the wrong classification to a worker can trigger back wages and penalties covering the entire project duration.

Union Payroll Considerations

Union construction payroll adds additional layers:

Union Fringe Contributions

• Health & Welfare: Hourly contribution to union health fund
• Pension/Annuity: Defined contribution to union retirement fund
• Vacation/Holiday: Some unions require contributions to vacation funds
• Training/Apprenticeship: Hourly contributions to joint apprenticeship programs
• Other funds: Industry advancement, legal, etc.

These are employer contributions paid in addition to wages — not deductions from employee pay.

Reporting Requirements

• Monthly or quarterly reports to each union trust fund
• Fringe benefit payments typically due 15th of the month following the pay period
• Late payments trigger penalties, interest, and audit rights for union trustees

Multi-Union Projects

Many commercial projects involve multiple trade unions. Each trade has its own CBA, wage rates, and fringe contribution rates.

Multi-State Construction Payroll

Construction crews often work across state lines. Issues to manage:

State Income Tax

• Workers owe income tax to the state where they work (not where they live)
• Some states have reciprocity agreements
• Workers working in multiple states need withholding from each state

State Unemployment Insurance

• Typically allocated to the state where work is performed
• Multi-state employers may file with multiple state agencies

Workers' Compensation

• Each state has jurisdiction for work performed there
• Many carriers provide multi-state endorsements
• Ensure coverage is in place before crews cross state lines

Job Costing Integration

Construction companies need payroll tied to job costs:

• Allocate labor costs by job/project code
• Track labor against budget by phase
• Include workers' comp, payroll taxes, and fringes in fully-loaded labor rate
• Monitor labor cost as a percentage of revenue by project type

A fully-loaded labor rate typically runs 130–145% of base wages when you include taxes, insurance, and benefits.

Recordkeeping Requirements

• Davis-Bacon: Payroll records for 3 years after project completion
• FLSA: 3 years for payroll records, 2 years for time and pay records
• I-9: 3 years from hire date or 1 year after termination
• State laws: Often longer retention requirements

Common Construction Payroll Mistakes

1. Missing certified payroll submissions – Even one missed week can jeopardize your contract
2. Wrong trade classifications – Laborers doing carpenter work must be paid carpenter rates
3. Failing to credit fringe benefits – Missing the opportunity to offset cash wages with bona fide benefit costs
4. No multi-state withholding – Assuming home state withholding is sufficient
5. Misclassifying workers as 1099 – Especially problematic on prevailing wage projects
6. Inadequate timekeeping – Relying on memory or paper timesheets is a compliance risk

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Construction payroll requires specialized expertise. Our team has deep experience with Davis-Bacon compliance, union payroll, and multi-state construction work across all major trades.