Staffing agencies place more than 16 million workers every year in the United States alone, according to the American Staffing Association. If you've never used one, you might wonder what they actually do, what they cost, and whether they're the right fit for your next hire.

This guide answers all three. You'll get a plain-English definition, a step-by-step walkthrough of how agencies work, a full breakdown of every fee model, and a three-way comparison against the alternative hiring models most growing companies are now weighing.

What Is a Staffing Agency?

A staffing agency is a company that connects employers with job candidates for temporary, temp-to-hire, or permanent positions. The agency sources, screens, and vets candidates on behalf of the employer, then places workers who match the role requirements. Employers pay the agency a fee, typically a markup of 25–75% on the worker's hourly wage for temp placements, or 15–30% of the first-year salary for direct hires. Candidates never pay the agency.

Staffing agencies are not a replacement for an in-house HR team. They supplement it. Companies typically engage them when a skills gap opens faster than internal recruiting can close it, when a project creates short-term headcount demand, or when a specialized role requires a candidate network the company doesn't have on its own.

The US staffing market reached $189.9 billion in 2025, growing 3% year-over-year, according to Staffing Industry Analysts  That scale reflects how embedded agency hiring has become across industries from healthcare to logistics to technology.

How Do Staffing Agencies Work?

The process is more structured than most employers expect. Here's what happens once you engage an agency.

Step 1: You submit a job description

You contact the agency and describe the role: title, required skills, compensation range, start date, and whether it's a temp, temp-to-hire, or permanent placement. The more specific you are here, the shorter the process.

Step 2: The agency sources candidates

The agency posts the role and draws from its existing candidate database. Most established agencies maintain pre-screened talent pools for their specialty areas, which is part of what you're paying for. They're not starting from zero.

Step 3: Screening and shortlisting

Depending on the role and agency, screening typically includes a resume review, phone or video screen, reference check, and background check. For technical or specialized roles, some agencies add a skills assessment at this stage.

Step 4: You review the shortlist and make the call

The agency presents 3–5 qualified candidates. You conduct a final interview or approve a placement directly. The hiring decision is always yours.

Step 5: Placement and administrative handoff

For temp and contract placements, the agency handles payroll, employment compliance, and in some cases benefits for the placed worker. For direct hire placements, the worker moves onto your payroll and the agency's role ends.

For common role types, this process takes 2–4 weeks. For specialized technical hires, the timeline extends: DistantJob cites a 50-day average for tech roles using traditional agency models.

Types of Staffing Agencies

Not all staffing agencies work the same way. The type you choose should match the kind of hire you need to make.

Temporary Staffing Agencies

These place short-term or hourly workers for seasonal demand, project spikes, or coverage gaps. The placement can last days, weeks, or months. The fee model is a markup on the worker's hourly wage, typically 25–75%. The agency handles payroll throughout the engagement.

Temp-to-Hire Agencies

The worker fills a role on a temporary basis for an agreed trial period, usually 90 days. If the fit works, you convert them to a permanent employee. This model reduces hiring risk: you evaluate performance before committing to a full-time headcount addition.

Direct Hire and Permanent Placement Agencies

The agency sources and vets candidates for a permanent role. You hire the placed worker directly onto your payroll. The agency charges a one-time placement fee, typically 15–30% of the worker's first-year salary. There's no ongoing payroll relationship with the agency after placement.

Executive Search Firms

These handle senior and C-suite placements. They operate on a retained basis (you pay a portion of the fee upfront before the search begins) or on contingency (you pay only on successful placement). Fees typically run 25–35% of first-year salary. The search process is more intensive and timelines are longer.

Specialized and Niche Agencies

These agencies focus on a specific industry or function: technology, healthcare, legal, finance, or creative. Their candidate networks are narrower but deeper. If you're hiring specialized remote developers, a niche tech-focused agency will typically outperform a generalist firm on candidate quality and fit.

Put these types side by side with alternative hiring models and the differences get sharper.

Staffing Agency vs. Temp Agency vs. Freelance Platform: How They Compare

This is the comparison most guides skip. A temp agency is a specific type of staffing agency. A freelance marketplace is a different model entirely. Here's how all three look side by side.

Data sources: ASA industry averages, altLINE market data ($189.9B US staffing market, 2025), DistantJob 50-day tech hiring timeline.

What the table shows: staffing agencies and temp agencies make the most sense for volume hiring, compliance-heavy local roles, and situations where your team doesn't have recruiting bandwidth. They absorb the administrative work. Freelance marketplaces trade that administrative offload for speed, global access, and cost efficiency.

Neither model is universally better. The right choice depends on the role, the timeline, and how much direct control you want over the hiring relationship. If you're evaluating a freelance marketplace with transparent pricing as part of that comparison, the cost structure difference is significant: a flat 7.95% platform fee compares favorably to a staffing markup of 25–75% on every hour worked. 

How Do Staffing Agencies Vet Candidates (And How Platforms Do It Differently)

Vetting quality is the factor most hiring guides don't examine closely. Here's what each model actually does.

Agency-side vetting typically includes:

• Resume and work history review
• Phone screen or in-person interview
• Background check and reference verification
• For specialized roles: a skills assessment, though depth and rigor vary significantly by agency

The limitation is opacity. You receive a shortlist, but you rarely see the evaluation process that produced it. How were candidates scored? What did the phone screen reveal? What did the references actually say? Most agencies treat this as proprietary.

Freelance marketplace vetting adds a different layer:

• Verified portfolio and past project history, visible to you before you engage
• Client ratings and review history are public and persistent across all engagements
• Skills tests or certification badges, passed at a defined threshold
• AI-assisted matching against role and team requirements
• Cultural fit signals derived from behavioral and communication patterns across past engagements

The key difference is transparency. On a marketplace, the vetting is multi-signal and visible. You're not taking the agency's word for it. You're reading 18 months of reviews from real clients who worked with this person on projects similar to yours.

On the goLance platform, that translates into a public-facing pool of vetted freelancers and active client companies, with cultural-fit filtering built into the candidate match. MANGO AI layers on AI-ranked candidate strengths and a plain-language "AI Manager" view that explains why a given freelancer matches a given role — so the shortlist isn't a black box, and a shortlist a client could review in two minutes is the norm rather than the exception. 

What Are the Benefits of Using a Staffing Agency?

For the right type of hire, staffing agencies deliver real value. Here's where they earn their fee.

Wider talent pool. Agencies maintain pre-screened candidate databases built over years of placement activity. For roles where your own network is thin, that existing pipeline matters.

Faster time-to-hire for common roles. For administrative, industrial, and general office roles, agencies can present candidates within days. The ASA reports average time-to-fill for common positions running well under the 50-day tech-hiring average cited above.

Administrative offload. For temp placements, payroll processing, employment compliance, and in some cases benefits administration stay with the agency. For smaller HR teams, this is a meaningful reduction in operational load. If building a flexible team without adding permanent headcount is a priority, the temp model handles this cleanly.

Flexible headcount. You can scale up for a product launch or seasonal peak and scale back down without the obligations of a permanent hire.

Compliance support. Agencies manage employment law and worker classification risk for placed workers, which matters for companies operating across multiple states or jurisdictions.

How Much Does a Staffing Agency Cost?

Fees vary by placement type. Here are the structures you'll encounter.

Temporary and contract placements. You pay a markup on the worker's hourly wage. The markup typically ranges from 25–75%, meaning a worker earning 37.50–$52.50/hour total. The agency earns the difference. This covers sourcing costs, payroll administration, employer taxes, and margin.

Direct hire and permanent placement. The agency charges a one-time fee of 15–30% of the placed worker's first-year salary. On an $80,000 salary, that’s  12,000–$24,000. Some agencies negotiate a tiered rate based on placement volume.

Executive search. Senior and C-suite placements typically run 25–35% of first-year salary. Retained engagements require a partial fee upfront, before the search begins, as a commitment from the employer that the role is real and funded.

Who pays. Employers always pay. Candidates never pay staffing agencies for placement services. If an agency charges candidates, that is not a staffing agency. It falls outside industry norms (American Staffing Association). This answers the common misconception directly.

For comparison, freelance marketplace fees work differently. The employer pays a platform service fee of 5–20% rather than a markup on wages, and the talent relationship is direct.

How to Choose the Right Staffing Agency

Five criteria are worth evaluating before you sign anything.

1. Match agency specialty to your role type. A generalist agency for a senior software engineer is a mismatch. Their candidate pool won't have the depth you need. Look for an agency whose portfolio of past placements aligns with the specific function and seniority level you're filling.

2. Evaluate their vetting process explicitly. Ask what screening steps they use. How do they assess for your industry? What's their process for technical roles? Generic answers ("we screen all candidates thoroughly") are a red flag. Specific answers signal experience.

3. Understand the full cost before signing. Get the markup percentage or placement fee in writing. Compare it against the total cost of alternative approaches: job boards, direct sourcing, or freelance platform fees. For a step-by-step guide to hiring freelancers directly, the cost comparison often surprises people.

4. Check geographic reach. Temp agencies tend to operate locally. If you're managing a distributed or remote team, a specialized or national agency (or a marketplace) gives you a larger candidate pool.

5. Clarify their placement guarantee. What happens if a placed worker leaves within 30, 60, or 90 days? Most agencies offer a replacement or partial refund within a defined window. Confirm this is written into the agreement before signing.

Is a Staffing Agency the Right Choice for Your Business?

The honest answer: it depends on the role.

Use a staffing agency when:

• You need high-volume local hiring fast: industrial, administrative, or logistics roles where the agency has an existing pipeline
• The role is compliance-heavy and you want payroll administration handled outside your team
• You need a temp-to-hire arrangement to evaluate fit before converting to a permanent headcount
• Your HR team is small and lacks the sourcing capacity to run a full recruiting process

Consider a freelance marketplace instead when:

• The role is remote, project-based, or requires a specialized technical or creative skill
• Speed matters: you need a vetted match in 24–72 hours rather than 2–8 weeks
• You want direct visibility into a candidate's portfolio, ratings, and real client reviews before engaging
• You're managing budget carefully: platform fees of 5–20% compare favorably to agency markups of 25–75% on every hour worked
• You need to scale a team internationally without local compliance overhead

On platforms like goLance, clients typically receive matched candidates within 72 hours and pay a flat 7.95% platform fee rather than a per-hour markup. The hiring relationship is direct, the candidate's performance history is visible before you commit, and AI-assisted matching through MANGO AI ranks candidate strengths and cultural fit in plain language.

If you're evaluating staff augmentation as a middle path between full-agency retainers and direct freelance hiring, that model is worth comparing here as well.

The two models aren't mutually exclusive, either. Some companies use staffing agencies for local compliance-heavy roles and freelance platforms for remote and technical hires at the same time.

Frequently Asked Questions

What is the difference between a staffing agency and a temp agency?

A staffing agency is the broader category, covering temporary, temp-to-hire, and permanent placement services. A temp agency is a specific type of staffing agency focused on short-term or hourly placements. All temp agencies are staffing agencies, but not all staffing agencies are temp agencies. The primary distinction is the length and permanency of placements they offer.

How do staffing agencies make money?

Staffing agencies charge employers a markup on the worker's compensation. For temporary placements, the markup is typically 25–75% of the worker's hourly wage. For direct hire or permanent placement, the agency charges a one-time fee of 15–30% of the placed worker's first-year salary. Candidates never pay staffing agencies. All fees are paid by the hiring company.

Is it free to use a staffing agency?

For job seekers, yes. Staffing agencies do not charge candidates. For employers, no. Temporary placement markups typically range from 25–75% on the worker's hourly wage. Permanent placement fees typically range from 15–30% of the placed worker's annual salary. Both are paid by the employer, not the worker.

What is the difference between a staffing agency and a recruitment agency?

The terms are often used interchangeably, but there is a meaningful distinction. Staffing agencies fill both temporary and permanent roles and often handle employment administration for temp workers (payroll, compliance, benefits). Recruitment agencies (also called executive search firms or headhunters) focus primarily on permanent or senior-level placements. They source and vet candidates but hand them off to the employer at placement. They do not typically remain the employer of record.

What are the benefits of using a staffing agency?

Key benefits for employers include access to a pre-vetted candidate pool, faster time-to-hire than posting on job boards, reduced administrative burden for payroll and compliance on temp workers, and flexible headcount scaling. For short-term or seasonal roles, staffing agencies can significantly reduce the cost and risk of a bad hire while keeping your internal HR team focused on permanent roles and culture.

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