Why Joint Employment Matters in Recruitment

Joint employment is the legal doctrine that causes staffing agencies in the US to lose sleep. When two entities share control over a worker's employment conditions, a court or regulatory agency can determine that both are employers, with full legal liability shared between them. For a staffing firm, that means liability for wage-and-hour violations at the client site, discrimination claims involving workers on client premises, OSHA violations occurring at client locations, and in some cases, responsibility for benefits the client fails to provide.

The financial exposure is real. The Department of Labor's joint employer rule under the Fair Labor Standards Act (FLSA) allows workers to pursue wage claims against staffing agencies for minimum wage and overtime violations that occurred at the client's worksite, if the agency is found to have joint employer status. NLRB decisions on joint employment affect union organising: if the staffing firm and client are joint employers, union certification at the client may extend to the agency's workers placed there.

Joint employment is not a theoretical risk for large agencies only. Smaller staffing firms with informal arrangements, verbal-only client agreements, or practices that blur the lines of who directs the work are often the most exposed, precisely because they have the fewest compliance resources to identify and document the risks.

How Joint Employment Works

Joint employer status is determined by courts and regulatory agencies based on the economic reality of the working relationship, not on what the contract says. A contract that states the client is not the employer does not prevent a joint employer finding if the facts of control say otherwise.

The most commonly applied federal test for joint employment under the FLSA examines four factors: whether the potential joint employer hires or fires the worker, supervises and controls the worker's schedule or conditions of employment, determines the worker's rate and method of pay, and maintains employment records. Courts apply a totality-of-the-circumstances analysis, so all four factors are weighed together rather than any single one being determinative.

Under the NLRA, the National Labor Relations Board's standard for joint employment has shifted multiple times over the past decade between the Obama-era Browning-Ferris standard (reserved control over terms and conditions is sufficient) and Trump-era rules (direct and immediate control required). Staffing agencies operating in labour-organised industries or with clients that have union exposure need to track the current NLRB standard because it affects whether their workers can be drawn into client-side union organising.

State law adds another layer. California's joint employer doctrine is broader than the federal standard. Several states have passed legislation that expressly holds staffing agencies jointly liable with clients for wage theft, safety violations, or worker misclassification, regardless of contractual provisions to the contrary. Agencies operating in California, New York, Illinois, and Washington face more expansive joint employer exposure than those operating exclusively in lower-regulation states.

A compliance director at a national staffing firm placing warehouse workers reviews every new client agreement before workers are placed. She looks for several risk factors in the relationship structure: does the client have the ability to request specific individuals or to reject workers the agency sends, does the client set work schedules directly, does the client supervisor direct day-to-day tasks without routing through the agency, and does the client have any role in determining pay rates for the workers. Where any of these factors are present, she documents the agency's controls to establish that direction of work flows through agency management, and she ensures the client agreement specifies in writing that the client does not retain authority over wages, scheduling, or disciplinary decisions.

Joint Employment vs Co-Employment

Joint employment and co-employment are related but distinct concepts. Co-employment is the general arrangement in which a staffing agency and a client business share employer responsibilities by design: the agency handles HR compliance, payroll, and benefits, while the client directs the day-to-day work. Professional employer organisations (PEOs) operate on a formal co-employment model. Joint employment, by contrast, is a legal determination that two entities are both employers even if they did not intend to be, because the facts of control establish it. Co-employment is a structured arrangement; joint employment is often an unintended legal consequence.

Joint Employment Risk in Practice

A regional staffing agency placed 45 warehouse operatives at a distribution centre client. Over 18 months, the client's floor managers had taken on increasing control of the workers' schedules, shift assignments, and performance reviews, while the agency's on-site coordinator had effectively become a payroll administrator with no active management role. When three workers filed a wage claim for unpaid overtime, the agency received a joint employer finding alongside the client. The DOL investigation covered 14 months of payroll records across all 45 workers. The agency's share of the settlement was $218,000. A subsequent review of the firm's other client relationships identified four similar arrangements where control had drifted to the client over time. The firm implemented quarterly relationship audits and on-site coordinator authority checklists to document and maintain agency control of employment conditions.