Temporary Workforce in Manufacturing: Managing Co-Employment Risk and Payroll Complexity

Last updated: June 2026

Temporary workers are a fixture of manufacturing operations. Demand fluctuates, headcount needs to flex, and staffing agencies provide a buffer between a facility’s permanent workforce and the volatility that comes with production schedules, seasonal peaks, and contract work. It’s a practical arrangement — until it isn’t.

The legal and payroll complexity that comes with a temporary workforce is significant, and manufacturing HR teams who treat temp workers as someone else’s problem — the agency’s problem — are setting themselves up for exposure they don’t expect. Co-employment risk is real. Misclassification is real. And the workers’ compensation and overtime questions that arise when temps work alongside direct hires are genuinely complicated in ways that matter during an audit or a lawsuit.

Understanding Co-Employment in Manufacturing

Co-employment exists when two entities — typically a staffing agency and a client manufacturer — share control over a worker’s employment. The staffing agency handles the formal employment relationship: it recruits, hires, pays wages, withholds taxes, and handles workers’ compensation. The manufacturer directs the work: it sets hours, provides supervision, controls the worksite, and decides when the worker is no longer needed.

That division of responsibility sounds clean. In practice, the manufacturer’s control over day-to-day work creates a secondary employment relationship that carries legal consequences. Courts and agencies applying the joint employer doctrine — under the FLSA, the National Labor Relations Act, and state law — look at the economic reality of the working relationship, not just what the staffing agreement says. A manufacturer that directs a temp’s work as closely as it directs its direct hires may be a joint employer, regardless of what the contract with the agency says.

What Co-Employment Liability Looks Like in Practice

Joint employer liability means the manufacturer can be held responsible for wage and hour violations the agency committed — or that arose from the combined arrangement. The most common: overtime violations when temp hours are not aggregated with direct hire hours in the same workweek, minimum wage violations when piece-rate or incentive pay structures depress effective hourly rates below the applicable minimum, and failure to pay for all hours worked when temps are required to be on-site before their scheduled shift or after it ends.

The Department of Labor’s Wage and Hour Division has historically targeted staffing agency arrangements in manufacturing enforcement actions precisely because the shared control structure makes wage violations harder to detect and attribute. When a violation is found, both the agency and the manufacturer may be on the hook.

Payroll Complexity: Where Manufacturing Facilities Get Into Trouble

Overtime When Temps Work Alongside Direct Hires

If a temp worker works 20 hours for the agency’s other clients in the same week they work 30 hours at your facility, your facility’s payroll system doesn’t know about those other 20 hours. Under the FLSA, if the agency is the sole employer, this isn’t your problem — the agency handles the overtime calculation. But if the economic reality of the relationship makes you a joint employer, those hours are your problem too.

The practical risk for manufacturers: temp workers who work long stretches at a single facility with minimal other assignments start to look economically dependent on that facility. The longer the arrangement continues, the stronger the joint employer argument becomes — and the greater the exposure for any overtime that was calculated incorrectly.

Workers’ Compensation Coverage Gaps

Staffing agencies are required to maintain workers’ compensation coverage for their employees, including temps placed at client facilities. But coverage gaps exist: if the agency’s coverage lapses, if the classification of the work performed doesn’t match the policy’s risk categories, or if the agency misclassifies the worker’s role, an injury at your facility may result in a disputed claim.

Manufacturing HR teams should verify agency workers’ compensation coverage before onboarding temp workers — and periodically throughout a long-term arrangement.

Conversion and Misclassification Risk

Many staffing agreements include provisions about “converting” temp workers to direct hires — either after a specified period or by paying a conversion fee to the agency. What’s less discussed: a temp worker who has been working at your facility continuously for six months or more, performing the same work as your direct hires, under the same supervision, with similar integration into your operations, may have a misclassification argument regardless of what the staffing agreement says. Courts look at the economic reality, not the contract label.

Managing the Temp Workforce Without Creating New Compliance Exposure

Using temporary workers in manufacturing isn’t inherently risky. The risks come from specific practices that blur the line between the agency’s responsibilities and the manufacturer’s.

• Document the division of control: The staffing agreement should clearly specify what the agency controls (hiring, wages, benefits, workers’ comp) and what the manufacturer controls (work direction, scheduling, safety). This doesn’t eliminate joint employer risk, but it establishes the parties’ intent and can be relevant in a dispute.
• Track temp hours alongside direct hire hours: Even if the agency is handling payroll, maintain your own records of hours worked by temp workers at your facility. If joint employment is ever asserted, you want to be able to demonstrate that hours were accurately tracked.
• Verify insurance coverage before onboarding: Get certificates of insurance for workers’ compensation and general liability from the agency before the first temp worker sets foot on your floor. Update these annually and when coverage periods roll over.
• Apply your OSHA safety program to temp workers: OSHA’s multi-employer worksite policy makes clear that both the agency and the manufacturer share responsibility for temp worker safety. Your safety training, hazard communication, and PPE requirements apply to temp workers on your floor.
• Use your HR system to track temp tenure: When temp workers pass the 90-day or 6-month mark, that’s a signal worth reviewing — both for conversion opportunity and for misclassification risk assessment.

Netchex’s HR management tools and time and attendance tracking give manufacturing HR teams the visibility to monitor temp worker hours alongside direct hire data — so you’re not learning about a compliance issue from an agency invoice or an audit notice. Pair that with payroll and tax tools built for complex workforce structures, and you have a defensible paper trail if questions ever arise.

Frequently Asked Questions

This guide reflects publicly available product information and independent reviewer data (G2, Capterra, Trustpilot, Yelp, Better Business Bureau, Reddit, Software Advice, GetApp) as of 2026. Feature availability and pricing may vary by plan. Contact each provider for current details.

Disclaimer: Any product roadmap or future plans provided herein are for informational purposes only. They do not represent a commitment to deliver any material, code, feature, or functionality. Plans may change without notification. The development, release and timing of any features or functionality described remain at the sole discretion of Netchex, its affiliates, and partners. Netchex does not give legal, tax, or accounting advice. You are responsible for ensuring your use of Netchex product meets your individual business and compliance requirements.

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