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Engineering & Professional Services Firms: Multi-Location Payroll Guide (2026)
Multi-location payroll for engineering firms means one payroll with per-location cost centers, a state account wherever a location or a remote employee sits, headcount thresholds counted across the whole company, and the engineering firm rules cited here applied at every site. BEG runs engineering firm payroll for $45 per employee per month inside the payroll software you already use, all-inclusive, live in 3 to 5 business days.
Rules that change with a second engineering firm location
For every week in which Davis-Bacon covered work is performed, the contractor or subcontractor must submit a certified payroll with a signed Statement of Compliance to the contracting agency; the prime contractor is responsible for all subcontractor submissions, and certified payrolls and basic payroll records must be preserved for 3 years after all work on the prime contract is completed.
Engineering is listed as a field of science or learning for the learned professional exemption, so engineers whose primary duty requires advanced knowledge acquired through prolonged specialized instruction and who are paid on a salary or fee basis at the standard salary level are exempt from overtime. Job titles alone do not determine exemption status.
What is counted company-wide
OSHA recordkeeping, the ADA and Title VII, COBRA, FMLA and the ACA employer mandate all count employees across every location, so a second site can trip a threshold no single site reaches. FMLA eligibility is the exception: the 50-employee test is measured within 75 miles of the employee's own worksite. A location in a new state adds a withholding account (unless the state has no wage tax), an unemployment account, that state's minimum wage and overtime rule for engineers and project managers, and its new hire and final pay deadlines.
How the payroll is structured
One EIN, one payroll, one set of pay codes for prevailing wage for government projects, billable hour payroll allocation and PE license classification, with location as a cost center on every employee record so labor cost, tax registrations and required postings resolve by site. Separate EINs per location are a legal-entity decision, not a payroll one, and each EIN files its own 941s and W-2s.
The rules behind this page, with sources
General information, not legal advice. Every rule below was read on the agency page linked next to it.
- For every week in which Davis-Bacon covered work is performed, the contractor or subcontractor must submit a certified payroll with a signed Statement of Compliance to the contracting agency; the prime contractor is responsible for all subcontractor submissions, and certified payrolls and basic payroll records must be preserved for 3 years after all work on the prime contract is completed. [29 CFR 5.5(a)(3)]
- Engineering is listed as a field of science or learning for the learned professional exemption, so engineers whose primary duty requires advanced knowledge acquired through prolonged specialized instruction and who are paid on a salary or fee basis at the standard salary level are exempt from overtime. Job titles alone do not determine exemption status. [DOL Fact Sheet #17D]
Read the full guide to how to manage payroll in multiple states, and the rest of the engineering firm payroll library.
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Frequently Asked Questions
Does a second engineering firm location need its own payroll?
No. One payroll with location cost centers is the norm under a single EIN. A second EIN, if the entity structure requires one, files its own returns and W-2s.
Which thresholds count employees across all engineering firm locations?
OSHA logs, Title VII and the ADA, COBRA, FMLA coverage and the ACA employer mandate. FMLA eligibility for an individual is measured within 75 miles of that employee's worksite.
Engineering firm multi-site rule: 29 CFR 5.5(a)(3)
For every week in which Davis-Bacon covered work is performed, the contractor or subcontractor must submit a certified payroll with a signed Statement of Compliance to the contracting agency; the prime contractor is responsible for all subcontractor submissions, and certified payrolls and basic payroll records must be preserved for 3 years after all work on the prime contract is completed.
What does managed payroll cost for an engineering firm?
$45 per employee per month, all-inclusive, inside the payroll software you already use, with no monthly minimum. Prevailing wage for government projects, billable hour payroll allocation and PE license classification are configured at setup, not billed as add-ons.
Related Resources
Anthony leads payroll solutions at Business Executive Group, a national managed payroll firm serving businesses across industries including Engineering & Professional Services Firms. BEG manages payroll at $45 PEPM, all-inclusive, with deep expertise in compliance, multi-state filing, and industry-specific payroll requirements. Get instant pricing at beghr.com.
Authoritative source: U.S. Department of Labor: Wage and Hour Division
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