When you're hiring, the choice of employment agency (or whether to use one at all) comes down to three questions: how fast do you need the role filled, how specialized is the skill set, and what's your budget. The answer shapes whether you should hire a staffing agency, a contingency recruiter, a retained executive search firm, or skip agencies entirely and rely on in-house recruiting. Each model has a different fee structure, a different incentive problem, and a different best-fit scenario. This page walks through the four main types of employment agencies, how they get paid, and how to pick one that fits the role you're trying to fill.
The Main Types of Employment Agencies
Staffing agencies place temporary and contract workers, usually for short-term or project-based needs. The staffing firm is technically the employer of record, handling payroll , payroll taxes, and benefits; the client company pays the staffing firm a markup on the worker's hourly rate. Typical markup is 40% to 70% on top of pay.
Contingency recruiters focus on permanent placements and only get paid when they successfully place a candidate. Fees run 15% to 25% of the candidate's first-year base salary. Retained executive search firms work on exclusive engagements for senior roles, collecting fees in three installments (usually 33% up front, 33% at shortlist, 33% at placement) totaling 25% to 35% of first-year compensation. State-run job centers (part of the American Job Center network operated by the DOL) offer free placement services focused on workforce re-entry and lower-wage roles.
How Agency Fee Structures Create Different Incentives
Contingency recruiters are paid only on placement, which creates a volume incentive. Expect more candidates, faster, but less depth on fit. Retained search is paid whether or not placement happens, which creates quality incentive but costs more up front. Staffing markups are per-hour, which creates an incentive to keep workers placed as long as possible rather than to convert them to full-time.
None of the incentive patterns are bad, but they're real. Pick the model that matches your role. A role where speed matters (replacing a departed manager) is usually a contingency job. A role where fit matters more than speed (a VP hire) is usually retained. A role with a short duration (maternity leave coverage) is staffing.
When Should You Go With a Retained Search?
Senior roles where a bad hire is very expensive, roles where confidentiality matters (replacing an incumbent who doesn't know yet), and roles where the candidate pool is very small and needs active headhunting. For everything else, retained search is usually overpriced.
Joint Employment Risks With Staffing Arrangements
When you hire through a staffing agency, federal law may treat both the agency and the client as joint employers for certain purposes. That matters most around wage-hour compliance, discrimination , and unionization. The DOL FLSA guidance covers joint employer analysis under wage-and-hour rules.
For temp-to-perm conversions, track hours carefully. After a certain tenure or pattern of exclusive work, a staffing worker can start looking more like your employee in the eyes of regulators, even if the staffing agency is still issuing the paycheck. Employment counsel should review conversion policies.
Getting Real Value From Your Employment Agency Relationship
Two practices separate companies that get their money's worth from those that don't. First, set a clear brief: the three must-haves, the three nice-to-haves, and the three non-negotiables. A vague brief produces vague candidate slates. Second, measure agency performance over time: time-to-slate, slate quality (interview-to-offer conversion), compensation accuracy, and 1-year retention of placed hires.
Keep a shortlist of 2 to 4 agencies per role family. Running the same role past multiple agencies creates noise and damages relationships. Running different role families through specialist agencies (a fintech search firm for a fintech role, a technical recruiter for engineering) usually outperforms a generalist. The American Job Centers network is worth a look for entry-level roles and hourly hiring, especially if your company participates in workforce development or apprenticeship programs.
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