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Construction Payroll Outsourcing: Cost vs. Hiring Payroll Manager (2026)
Construction payroll is one of the most complex payroll environments in any industry. You are managing multiple job sites, multiple states, certified payroll for prevailing wage contracts, union and non-union crews, job costing allocations, and a workforce that changes size week to week. One misclassification or missed certified payroll filing creates penalties that dwarf the cost of running payroll correctly.
The question most contractors face is whether to keep a payroll manager in-house or outsource to a provider that specializes in construction. Here is the full cost comparison, including the numbers most contractors never see until it is too late.
The True Cost of an In-House Construction Payroll Manager
A construction payroll manager or HR coordinator with union and certified payroll experience earns $52,000-$72,000 in base salary. That is the number contractors usually quote when comparing options. Here is the full picture:
| Cost Category | Annual Cost |
|---|---|
| Base salary (payroll manager with construction experience) | $52,000-$72,000 |
| Benefits (health, dental, 401K) ~30% | $15,600-$21,600 |
| Payroll taxes (FICA, FUTA, SUTA) ~10% | $5,200-$7,200 |
| Payroll software license | $2,400-$5,400 |
| Training & compliance updates (Davis-Bacon, state laws) | $1,500-$3,500 |
| Hiring & onboarding cost (amortized over 2-yr tenure) | $2,000-$4,700 |
| Total loaded cost | $78,700-$114,400 |
And this does not account for risk exposure when that person makes a certified payroll error, misapplies a prevailing wage determination, or leaves the company mid-project.
The Cost of BEG Managed Payroll at $25-$45 PEPM
| Crew Size | Monthly | Annual | vs. In-House |
|---|---|---|---|
| 30 employees | $750-$1,350 | $9,000-$16,200 | Save $62K-$102K/yr |
| 60 employees | $1,500-$2,700 | $18,000-$32,400 | Save $46K-$89K/yr |
| 100 employees | $2,500-$4,500 | $30,000-$54,000 | Save $25K-$72K/yr |
| 150 employees | $3,750-$6,750 | $45,000-$81,000 | Varies at scale |
All-inclusive: certified payroll reports, job cost allocation, prevailing wage processing, multi-state tax filing, union deductions, W-2s, and compliance updates. No per-project fees. No separate certified payroll module.
The Hidden Costs Most Contractors Miss
Certified payroll penalty exposure. A missed or incorrect certified payroll filing on a prevailing wage project can result in debarment from future government contracts, back-pay liability for misclassified workers, and penalties starting at $10,000 per violation under the Davis-Bacon Act. Many construction payroll managers are competent at standard payroll but are not deeply versed in prevailing wage compliance.
Workers' comp misclassification. In construction, workers' comp premiums vary dramatically by classification. A laborer, a carpenter, and a project manager carry very different rates. Misclassification at audit creates retroactive premium adjustments that can run 15-25% of total payroll for the entire audit period.
Overtime pyramid errors. California and several other states require daily overtime in addition to weekly. For construction workers on California projects or crossing state lines, this creates significant compliance exposure that general payroll managers frequently miss.
Workforce size volatility. Construction crews scale up and down by project. An in-house payroll manager is a fixed cost whether you have 40 people on a job or 120. Outsourced payroll scales with your headcount -- lower cost when crews are small, reasonable cost when they grow.
What Construction Payroll Requires That Generic Payroll Does Not
- Certified payroll reports (WH-347): Required for any project receiving federal or state prevailing wage funding. Must be filed weekly, accurately, with correct wage determinations by job classification.
- Job cost allocation: Labor costs must be allocated to specific projects, cost codes, and phases for accurate job costing. This feeds project management and accounting -- it is not optional for profitability tracking.
- Prevailing wage determinations: Wage rates vary by county, trade classification, and sometimes project type. These must be updated when federal or state agencies publish new determinations.
- Multi-state payroll: Workers traveling to job sites in different states create withholding and unemployment obligations in each state they work in, even temporarily.
- Union vs. non-union payroll: CBA-governed workers have different wage scales, benefit contributions, and reporting requirements that must run correctly in the same payroll cycle as non-union staff.
Decision Framework: When to Outsource Construction Payroll
| Company Size | Recommendation | Primary Reason |
|---|---|---|
| Under 40 employees | Outsource | Volume does not justify in-house hire. Compliance risk is high without a specialist. |
| 40-150 employees | Outsource | Strongest ROI range. Saves $22K-$90K/yr with full compliance coverage included. |
| 150-300 employees | Outsource or hybrid | Outsourcing remains cost-effective. Hybrid works if you want internal HR for workforce management. |
| 300+ employees | Assess annually | Scale may justify in-house, but certified payroll complexity still argues for outsourcing. |
Construction Payroll, Handled.
Certified payroll, Davis-Bacon, job costing, multi-state compliance -- all at $25-$45 per employee per month. Answer a few quick questions to see what it costs for your crew size and project mix.
FAQ: Construction Payroll Outsourcing
How does outsourced payroll handle Davis-Bacon certified payroll?
A managed payroll provider generates certified payroll reports (WH-347 format) automatically each cycle for any federally funded project. Wage determinations are applied by job classification, and the report is produced alongside standard payroll with no manual assembly required. This is a standard service for contractors with federal or state prevailing wage requirements.
Can you run payroll by job code so we can track labor costs per project?
Yes. Job costing integration is a core capability for construction payroll. Each employee's hours are allocated to specific job codes, cost centers, or project numbers. This produces labor cost reports per project that your PM team and accountants can use -- something that is difficult to maintain accurately with a manual in-house process.
How do you handle union and non-union employees on the same crew?
We configure separate wage schedules, benefit deductions, and reporting for union and non-union employees within the same payroll run. CBA rules are applied to union workers, standard rules to non-union, and the output is clean and reconciled. No separate systems needed.
What about workers on multiple states or jobs in multiple jurisdictions?
Multi-state payroll is standard. Each employee's wages are allocated to the correct state based on where they worked, apportioned by hours if they cross states in a single pay period. Each state's withholding, unemployment, and minimum wage rules are applied correctly.
How long does it take to get set up?
Most construction contractors are live in 3-5 business days. We configure job codes, union rules, prevailing wage determinations, and state registrations, run a parallel test cycle, and go live. The cleanest time to switch is at the start of a new project or new quarter.
What does BEG charge for construction payroll?
BEG manages construction payroll at $25-$45 per employee per month, all-inclusive. That covers payroll processing, certified payroll reports, tax filings, W-2s, multi-state processing, and compliance updates. For a crew of 60, that is $1,500-$2,700 per month.
Anthony leads payroll and HR solutions at Business Executive Group, a national managed payroll firm serving contractors, engineering firms, and skilled trades operations. BEG handles certified payroll, Davis-Bacon, union CBAs, and multi-state compliance at $25-$45 PEPM, all-inclusive.
Authoritative source: IRS: Independent Contractor or Employee
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