Introduction
Most people first deal with a staffing agency when something is urgent. A project needs two extra engineers next week, or a job seeker needs work between full-time roles. Both sides end up asking the same questions: who actually employs the worker, who pays whom, and what's the catch?
This guide answers those questions plainly. It covers what a staffing agency does, how the money flows, the main types of agencies, and the contract terms worth checking before you sign anything.
TL;DR
- A staffing agency finds, screens and places workers with client companies, and on contract roles it usually employs those workers directly.
- On contract placements, agencies earn the difference between the bill rate the client pays and the pay rate the worker receives.
- On direct-hire placements, agencies charge a one-time fee, commonly a percentage of the new hire's first-year salary.
- Agencies range from general temp firms to specialists in IT, healthcare and executive search, so match the agency to the role.
- Before signing, check the markup, conversion fee, replacement guarantee and non-solicitation terms. Candidates should never pay an agency to get placed.
What is a staffing agency?
A staffing agency is a company that supplies workers to other businesses. It recruits candidates, screens them, and places them in temporary, contract, contract-to-hire or permanent roles with client companies.
For temporary and contract roles, the agency is usually the employer of record. The worker does the job at the client, but the agency runs payroll, withholds taxes, carries workers' compensation insurance and handles employment paperwork.
The industry is large. According to the American Staffing Association (ASA), nearly 2.0 million temporary and contract employees worked for U.S. staffing companies in an average week in 2025. The ASA also counted around 27,000 staffing and recruiting companies operating close to 54,000 offices in 2021.
Most agencies offer more than one service. The ASA lists temporary and contract staffing, recruiting and permanent placement, outsourcing and outplacement, and HR consulting as the main ones.
How a staffing agency works
Every staffing arrangement has three parties. Confusion usually starts when people aren't sure who's responsible for what.
On a direct-hire placement, the picture changes. The agency recruits and screens, the client hires the person onto its own payroll, and the agency steps out after the start date.
If you want to see what happens between intake and day one, our post on how staffing agencies handle vetting and onboarding walks through each stage.
How staffing agencies make money
This is the part most clients and candidates are least clear on, so it's worth spelling out.
Contract and temporary placements
The agency bills the client an hourly bill rate. It pays the worker a lower hourly pay rate. The gap between the two is the markup.
Here's a simple, hypothetical example. A contract developer earns a pay rate of $60 per hour. The agency bills the client $80 per hour. That $20 doesn't all go to profit. It has to cover:
- Employer payroll taxes
- Workers' compensation and liability insurance
- Benefits, where the agency offers them
- Recruiting, screening and background check costs
- Payroll processing, invoicing and account management
- The agency's margin
Markups vary widely by role, location, contract length and whether benefits are included. That's why a single "standard" markup figure is rarely useful. Ask for the breakdown instead.
Direct-hire placements
For permanent roles, the agency charges a one-time placement fee once the candidate starts. As our guide to IT staffing service models explains, this fee usually falls between 15% and 25% of the hire's first-year salary.
Most agreements include a guarantee period. If the hire leaves early, the agency replaces them or refunds part of the fee.
Contract-to-hire conversions
When a contractor converts to the client's payroll, many agencies charge a conversion fee. The fee often shrinks the longer the contractor has worked through the agency, and some contracts waive it after a set number of hours.
Bill rates can look expensive next to a salary. But a full-time employee also carries benefits, taxes and onboarding costs.
Our breakdown of IT contract staffing costs shows how that comparison usually plays out.
Types of staffing agencies
"Staffing agency" covers very different businesses. A firm that fills warehouse shifts operates nothing like one placing cloud engineers.
The ASA's occupational breakdown shows the spread: 36% of staffing employees work in industrial roles, 24% in office and administrative roles, 21% in professional and managerial roles, 11% in engineering, IT and scientific roles, and 8% in health care.
The last row surprises people. Some staffing companies don't serve end clients at all. They supply candidates to other agencies.
Our guide to staff augmentation company types explains how that model works and who it suits.
For technology hiring specifically, our list of top IT staffing companies in the USA compares the larger firms by size and specialty.
Staffing agency vs recruiting firm vs RPO
These terms overlap, and many companies offer all three. The practical differences:
- Staffing agency: fills individual roles, often employing contract workers directly.
- Recruiting or search firm: focuses on permanent hires and is paid a placement fee. The client employs the hire from day one.
- RPO provider: runs part or all of a company's recruiting function on an ongoing basis, usually under the client's brand.
If you're hiring at high volume across many roles, recruitment process outsourcing may fit better than placing roles one at a time.
When it makes sense to use a staffing agency
A staffing agency is usually worth it when:
- The role is urgent and an empty seat is already costing you.
- The work has a defined end date and you don't want permanent headcount.
- The skill set is specialized and your team rarely sources it.
- You want to test fit through contract-to-hire before committing.
- You'd rather not take on payroll and compliance for short-term workers.
It's less useful when your internal team already fills the role well, or when the position needs a long, culture-heavy search.
For a balanced look at the trade-offs, read our candid breakdown of using a staffing agency for tech roles.
Contract terms to check before you sign with a staffing agency
Most disputes between clients and agencies trace back to terms nobody read closely. Before signing, look for these:
- Bill rate and markup transparency. Ask what the bill rate includes and whether the agency will share the pay rate.
- Conversion fee. Check how much it costs to hire a contractor permanently and whether the fee drops over time.
- Guarantee or replacement period. Find out what happens if a placement leaves or doesn't work out in the first weeks.
- Non-solicitation clause. Confirm how long you're barred from hiring the agency's workers directly outside the agreement.
- Employer of record and insurance. Confirm the agency carries workers' compensation and general liability coverage for its workers.
- Screening standards. Get in writing which background checks, reference checks and skills assessments happen before submission.
- Subcontracting. Ask whether candidates come from the agency's own payroll or from subvendors further down the chain.
- Termination terms. Check the notice period for ending an assignment early.
For a longer evaluation checklist on technical roles, see our guide on how to choose the right IT staffing agency.
Staffing agency red flags
For employers, watch for agencies that:
- Send large batches of resumes that barely match the requirement
- Can't explain how they vetted a candidate
- Won't say whether candidates come from their own payroll or a subvendor
- Submit the same candidate you've already received from another firm
For candidates, the biggest red flag is a request for money. The FTC's guidance on job scams is clear that legitimate placement firms are paid by employers, not job seekers.
Other warning signs include vague job details, an agency that won't name the client after you've signed an RTR, and pressure to share bank details before an offer.
If you want a starting point for finding reputable firms, the ASA runs a member directory of staffing agencies, and its members agree to the association's code of ethics.
Working with a staffing agency as a job seeker
Staffing agencies are often the fastest route into contract work, especially in tech. The ASA reports that 64% of staffing employees use staffing companies to fill a gap between jobs or to help land a job.
A few habits help:
- Ask whether the role is W-2, C2C or 1099, and who your employer of record will be.
- Confirm pay rate, benefits, overtime rules and assignment length before signing.
- Read every right to represent (RTR) and make sure it names one specific job.
- Keep a list of where each agency has submitted you, so you're never double-submitted.
Our candidate guide to staffing agencies for remote jobs goes deeper on agency types and pay structures.
Choosing a staffing agency that fits
A good staffing agency does more than forward resumes. It understands the role, vets candidates properly, handles employment and compliance cleanly, and is upfront about what it charges.
Match the agency type to the role, read the contract terms closely, and judge the firm by the quality of its first few submittals, not the size of its pitch.
Start Strong With Consultadd
With 15 years in business and 5,000+ successful staffing engagements, we don't just fill roles, we build reliability into your process. We've supported 65 staffing companies in the past year alone and maintain MSAs with industry leaders like Robert Half and TEKsystems.
Here's what working with Consultadd looks like:
- Talent sourced in under 24 hours
- Ready-to-deploy candidates, vetted for experience and compliance
- Lower turnover risk: we match long-term goals, not just short-term needs
- Seamless compliance: visa, documentation, onboarding? Handled.
- Dedicated 1:1 account managers for responsive, personalized support
- Top 100 candidate matches delivered in the past year
- Strong partnerships with universities to tap into fresh, committed talent
- Post-placement support so your investment grows beyond day one
For candidates, your next opportunity is more than just a job title, it's a chance to build skills, gain experience, and move your career forward. At Consultadd, we connect technology professionals with projects and employers that align with their goals, whether they're looking for contract, contract-to-hire, or long-term opportunities.
The tech job market moves fast, but the right guidance can make all the difference. Ready to take the next step in your career journey? Explore Opportunities >>
Key takeaways
- A staffing agency recruits and places workers, and on contract roles it usually acts as the employer of record.
- Contract revenue comes from the markup between bill rate and pay rate, which also covers taxes, insurance and recruiting costs.
- Direct-hire placements typically carry a one-time fee of 15% to 25% of first-year salary, often with a guarantee period.
- Agency types differ sharply, so pick a firm that specializes in the roles you're filling.
- Read conversion fees, guarantees and non-solicitation terms before signing, and treat any candidate fee as a red flag.
FAQs
What does a staffing agency do?
A staffing agency recruits, screens and places workers with client companies. For temporary and contract roles, it usually employs the worker and handles payroll, taxes and insurance while the client directs the daily work. For permanent roles, it recruits candidates the client then hires directly.
How much does a staffing agency charge?
For contract roles, the agency adds a markup to the worker's pay rate, and that markup varies by role, location and benefits. For direct-hire roles, the fee is commonly 15% to 25% of the new hire's first-year salary. Ask any agency for a clear breakdown before you sign.
Do staffing agencies charge job seekers?
Legitimate staffing agencies are paid by the employer, not the candidate. If an agency asks you to pay for placement, training or an interview, treat it as a likely scam. The FTC warns job seekers against paying up front for the promise of a job.
What is the difference between a staffing agency and a temp agency?
A temp agency is one type of staffing agency that focuses on short-term assignments. Staffing agencies more broadly also handle longer contracts, contract-to-hire roles and permanent placements. Many firms do all of these.
Can a staffing agency job become permanent?
Yes. In a contract-to-hire arrangement, the worker starts on the agency's payroll and can convert to the client's payroll later. The client may pay a conversion fee, which often decreases the longer the worker has been on assignment.
Are staffing agency workers employees of the agency?
On most temporary and contract placements, yes. The agency is the employer of record and handles wages, tax withholding and workers' compensation. Some arrangements, like corp-to-corp contracts, work differently, so confirm the setup before you start.
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