In-House Recruiting vs Staffing Agency: Cost and Speed Comparison

In-house recruiting costs less per hire once you’re making 10 or more placements a year, but it’s slower and carries fixed overhead whether you’re hiring or not. A staffing agency charges 15% to 25% of first-year salary per placement, delivers shortlists in 10 to 14 days instead of 44, and you pay nothing when you’re not hiring. The right answer depends on your volume, your urgency, and which hidden costs you’re willing to count honestly.

That last part is where most comparison articles fall apart. They line up recruiter salary against agency fee, declare a winner, and call it analysis. The math isn’t wrong. It’s incomplete. Nobody counts the 18 hours your engineering director spent reviewing resumes last quarter. Nobody counts the $14,000 you lost when that in-house hire quit at month four and you had to restart the search from scratch. Nobody counts the $500-a-day revenue hit from leaving a senior developer seat empty for 60 days while your internal team worked through the pipeline.

We run IT staffing at KORE1. We earn a fee when you hire through us. I’m saying that now because the rest of this piece will include moments where I’ll tell you to build internally, and I want you to believe me when I do. Tom Kenaley, technical placements. The pricing breakdown for our services is public if you want the specifics on fee structures before you read further.

The Real Cost of In-House Recruiting

Most companies calculate their cost-per-hire by dividing total recruiting spend by total hires. The SHRM Benchmarking Report puts the national average at $4,700 for standard roles and $5,475 when you include the full internal cost stack. Tech roles run closer to $6,200. Executive hires jump to $35,879.

Those numbers are real. They’re also misleading, because they don’t include three costs that most companies never track.

Hiring manager time. Every open req eats 15 to 20 hours of a hiring manager’s calendar. Intake meetings, resume reviews, interview panels, debrief calls, offer negotiations, the back-and-forth with HR on comp bands. A mid-level engineering manager costs $85 to $110 per hour fully loaded, so those 15 to 20 hours add up to $1,275 to $2,200 per hire, buried in the engineering budget where finance never sees it. Finance doesn’t flag it. Nobody adds it to cost-per-hire. It’s real money.

The second invisible cost is the ATS and tool stack. A mid-market company running Greenhouse or Lever is paying $6,000 to $25,000 a year depending on headcount tier and module add-ons. LinkedIn Recruiter Lite runs $1,788 per seat per year. Indeed Sponsored Jobs, ZipRecruiter premium postings, niche job boards for specialized roles. A company making 15 hires a year easily spends $18,000 to $40,000 on tooling alone, and most of that spend is fixed. You pay it whether you fill two roles or twenty.

Third cost that nobody likes to talk about. Failed hires. The U.S. Department of Labor pegs a bad hire at roughly 30% of first-year earnings, which on a $120K engineer means $36,000 gone before anyone’s written the new job posting. Then add the vacancy cost of re-opening the search, the team disruption, and the morale hit to the people who interviewed that person and now have to do it all over again. We’ve watched clients lose north of $50,000 on a single failed senior hire when you add the restart cost. Agencies typically offer a 60- to 90-day guarantee. Your internal team offers no such thing.

Add it up for a company making 10 hires a year with one dedicated recruiter. You’re looking at $140,000 to $220,000 in total recruiting cost before you count the failed-hire exposure. Divide by 10 and your real cost-per-hire lands between $14,000 and $22,000. Not $4,700.

What a Staffing Agency Actually Charges

Three models. Figure out which one you’re actually buying before you compare prices.

Contingency placement is the most common for mid-level roles. The agency sources, screens, and presents candidates, and you pay a fee only when someone accepts your offer and actually starts working, which means you can run the process in parallel with your internal team’s efforts without any financial risk if the agency doesn’t produce. Standard fees run 15% to 25% of first-year base salary, with 20% being the number I hear most often for non-executive tech roles. On a $130,000 software engineer, that’s $26,000. On a $90,000 help desk manager, it’s $18,000. Nothing upfront. Nothing if the search fails. Most contingency agreements include a 60- to 90-day replacement guarantee, meaning if the hire leaves or gets terminated in that window, the agency reruns the search at no additional fee.

Retained search is for senior and executive roles where the agency commits dedicated resources and you commit upfront payment, usually in thirds. One-third at engagement, one-third at shortlist, one-third at placement. Fees run 25% to 35% of total first-year compensation including bonus. You’re paying for exclusivity and depth. The agency isn’t running your req alongside 40 others. They’re building a target list and going after specific people. This is the right model for VP-level hires, niche technical leadership, and any role where the candidate pool is genuinely small.

Contract and contract-to-hire uses a bill rate markup instead of a placement fee. The agency employs the worker, handles payroll and benefits, and bills you an hourly rate that includes a 25% to 50% markup over the worker’s pay rate. A contractor earning $65/hour might bill at $85 to $95/hour. If you convert to permanent after the contract period, there’s usually a conversion fee, but it’s often prorated based on hours already worked. Our contract staffing page walks through the conversion math in detail.

The Break-Even Math Everyone Gets Wrong

The standard comparison goes like this. Below 5 to 7 hires a year, agencies win because the math on a full-time recruiter just doesn’t work at that volume. If you’re making more than that, the in-house model wins because you spread the recruiter’s fixed cost across more placements.

That math is directionally correct. It’s also missing three things.

First, it assumes your internal recruiter fills every role. They won’t. A single technical recruiter can handle 15 to 25 open requisitions and close 3 to 5 hires per month when the pipeline is healthy and the roles aren’t niche. But when three of those reqs are for staff-level engineers with obscure stack requirements and two are for managers who need a security clearance, three of those reqs are going to an agency anyway. Now you’re paying the recruiter’s salary plus the agency fees on the hardest roles. The break-even model doesn’t account for that split.

Second, it treats all hires as equal. They aren’t. A junior QA analyst and a principal cloud architect do not cost the same amount to source. The internal recruiter fills the QA role in two weeks from inbound applications. The cloud architect search takes 90 days, involves sourcing 200 passive candidates on LinkedIn, and still might not close. The average cost-per-hire across both roles looks reasonable. The individual cost on the architect role is astronomical, and it would have been cheaper and faster to hand that one to an agency from the start.

Third, nobody accounts for vacancy cost. An open seat bleeds $4,000 to $9,000 per month according to SHRM, and that number moves with seniority. A senior software engineer seat sitting empty for 60 days costs the company somewhere around $8,000 to $18,000 in lost productivity, overtime for the team picking up the slack, and delayed project timelines. If an agency cuts that vacancy by even 20 days, you’ve recovered $2,700 to $6,000 in output that never shows up in the cost-per-hire spreadsheet.

That table looks clean. Real life isn’t. At the 12-hire mark you’re probably sending 2 to 3 of those to an agency because your recruiter can’t close them alone, which puts the actual cost closer to $245,000. At 25 hires you need a second recruiter or a coordinator, pushing the in-house number up by another $60,000 to $90,000. The crossover point moves depending on which costs you’re honest about.

Speed: Where the Agency Model Pulls Away

The national average time-to-fill is 44 days according to SHRM’s 2025 data. For senior technical roles, nearly 40% of searches exceed 90 days. That number hasn’t budged in three years even though every ATS vendor on the planet swears their AI sourcing feature is going to cut it in half, and the reason it hasn’t budged is that the bottleneck was never sourcing speed in the first place, it was interview scheduling, offer committee delays, and hiring managers who take nine days to give feedback on a phone screen.

Agencies operate differently. Not better. Differently. A contingency firm running a senior DevOps search already has 30 to 50 passive candidates in their network who told them six months ago they’d move for the right opportunity. They’re not starting from a job posting. They’re starting from a warm list. Shortlists of 3 to 5 qualified candidates typically arrive in 10 to 14 days, not 44.

There’s a math problem nobody talks about when it comes to speed. Every day a role sits open costs money. Not in a vague way. In a specific, calculable way. A senior software engineer billing internally at $600 to $700 per day in output value isn’t producing that value while the seat is empty. The team around them is absorbing the work, which means their output drops too. Cut 20 days off a search and you’ve recovered $12,000 to $14,000 in team productivity. That recovered value often exceeds the agency fee differential on a single placement.

Speed matters less for roles with deep candidate pools. Junior analysts, coordinators, entry-level developers in popular stacks. Your ATS inbox will be full in a week. It matters enormously for roles where the qualified candidate pool is measured in dozens, not thousands. Cloud security engineers. Staff-level backend developers with distributed systems experience. Engineering managers who’ve actually scaled teams past 30. Those searches are where 44 days becomes 90, where your internal recruiter sends 300 InMails and gets 11 responses, and where the agency’s existing network of passive candidates who already trust the recruiter’s judgment is worth every dollar of the placement fee because you simply cannot build that network from a standing start on a single req.

Where In-House Wins, and It’s Not Just About Cost

Building an internal recruiting function does three things an agency can’t replicate.

First, employer brand. Your internal recruiter is selling your company eight hours a day, five days a week. They learn the team dynamics, the real culture beyond the careers page copy, the specific reasons people stay and leave. That knowledge compounds. By month six, a strong internal recruiter can answer candidate objections about your company in ways an outside agency never will, because the agency is splitting attention across 15 to 20 clients and can’t possibly know all of them that well. We’re honest about this at KORE1. We know our repeat clients deeply. First-time clients, we’re learning on the fly, and the candidate experience is slightly thinner in those early engagements.

Second, institutional knowledge. Your recruiter who’s been around for two years knows the last three DevOps hires who stuck all came from consulting backgrounds. She knows the VP of Engineering will reject any process that includes a take-home assignment. She knows the San Diego office closes candidates at 15% higher rates than LA because of the commute difference, and she stopped routing LA-based candidates to the SD team six months ago without being told to. That pattern recognition takes time to build. An agency gets some of it during intake. Never all of it.

Third benefit is pipeline continuity. When your internal recruiter fills a role, the silver-medal candidates stay in your ATS. Six months later when a similar role opens, you’ve got a warm pipeline. An agency’s pipeline belongs to the agency. When the engagement ends, that pipeline walks out the door with it. Some agencies share candidate data. Most don’t, or share it with restrictions that make reactivation slow.

Am I underselling the in-house model? No. They do. Especially for companies with consistent, predictable hiring volume. If you know you’re making 15 to 20 hires a year, every year, in the same types of roles, building internally is almost always the right move. The economics work and the compounding advantages are real.

The trouble is that most mid-market tech companies don’t have consistent, predictable volume. They have quarters where they hire eight people and quarters where they hire zero. They have one unexpected resignation that creates an urgent backfill and three planned expansions that keep getting pushed to next quarter. That volatility is where in-house recruiting gets expensive, because you’re carrying the fixed cost through the dry spells.

The Hybrid Model Most Mid-Market Companies Actually Use

The companies that get the best results aren’t choosing one model or the other. They’re using both, selectively.

It usually looks something like this. One or two internal recruiters own the core hiring pipeline. They handle roles where the candidate pool is large, the requirements are well-understood, and speed isn’t life-or-death. Junior to mid-level developers, analysts, PMs in common verticals, operations staff. These are the roles where the internal team’s familiarity with the company, the hiring manager’s quirks, the team’s actual working style beyond what the careers page says, and the unwritten list of reasons the last three people in this role either thrived or flamed out gives them an edge that no external recruiter can match in a 45-minute intake call.

The agency relationship activates for the roles that break the internal model. Niche technical searches where the recruiter’s LinkedIn Recruiter license isn’t going to surface the right people because the right people stopped updating their LinkedIn profiles two years ago and only respond to recruiters they’ve worked with before. Urgent backfills where a 60-day vacancy would cost more than the agency fee. Confidential searches where you can’t post the role publicly. Executive and leadership hires where the retained model’s depth is worth the premium. Surge periods where you need 6 hires in 8 weeks and your recruiter already has 20 reqs open.

We see this model constantly at KORE1. About 60% of our client base has an internal TA function. They don’t call us because they can’t recruit. They call us for the roles their team can’t get to, or the ones that are hard enough to justify paying the fee for speed and access. The relationship works best when there’s a clear handoff protocol. Internal team owns roles under a certain seniority level or within certain skill profiles. Agency handles everything above that line, or everything that’s been open for more than 30 days without a viable shortlist.

Contract-to-hire is the bridge a lot of companies use when they’re not sure which model to commit to. You get agency speed for the initial placement, you evaluate the person on the job for three to six months, and you convert to direct hire if it works out. The conversion fee is typically prorated based on hours already worked, and the total cost usually comes in lower than a retained search for the equivalent permanent role, especially when you factor in the reduced risk of a bad fit because you’ve already watched the person do the actual work for three to six months before committing to a full-time offer. It’s risk mitigation. You’re trading a slightly higher per-hour cost during the contract window for the option to walk away if the fit isn’t right.

How to Decide: A Practical Framework

Forget the pros-and-cons lists. Here are five questions that actually drive the decision.

How many hires are you making this year? Under 8 and you probably shouldn’t carry a full-time recruiter. The fixed cost doesn’t pencil out. Over 15 and you almost certainly need at least one internal recruiter, supplemented by agency partnerships for niche or urgent roles. Between 8 and 15 is the gray zone where either model can work, and the right answer depends on the other four questions.

Is your hiring volume predictable? A company that hires 12 people every year, spread roughly evenly across quarters, is a textbook case for building internally. A company that hires 12 people this year, then 4 next year, then 18 the year after that, is going to waste somewhere north of $150,000 on a recruiter sitting idle during the slow quarters, and the internal justification for keeping the seat will shift from “we need them for hiring” to “well, they’ve been working on the careers page and the onboarding deck,” which is a polite way of saying the role has no ROI right now. Agencies flex with your volume. Internal teams don’t.

How niche are your roles? If 80% of your hires are in common skill sets with large candidate pools, your internal recruiter can handle it. If 40% of your hires require specialized skills, security clearances, or rare technology stacks, you’ll be sending those to an agency anyway, so your break-even calculation on the in-house model should only count the roles the internal team can actually close.

What does an empty seat cost you per week? If a 60-day time-to-fill is acceptable, internal recruiting works fine. If you have roles where every week of vacancy costs measurable revenue, the agency’s 10-to-14-day shortlist becomes worth the fee. Do the vacancy cost math. $600 per day times 20 days saved is $12,000 in recovered productivity. That changes the break-even point.

What’s your tolerance for failed hires? Agencies offer guarantees. Internal teams don’t. If you’re in a role where a bad hire creates cascading problems, the agency’s replacement guarantee has a dollar value. Not a huge one. But a real one.

What Hiring Managers Keep Asking Us

Is the agency fee actually worth it, or am I just paying for convenience?

Entirely depends on which role you’re filling. For a junior data analyst where you’ll get 200 applications from a LinkedIn post, probably not. The fee is buying speed you don’t need. For a staff-level Kubernetes engineer where the entire qualified candidate pool in your metro is maybe 40 people, the fee is buying access to candidates who will never see your job posting because they’re not looking. We had a client in Irvine last year who spent 11 weeks trying to fill a senior DevSecOps role internally. Called us at week 12. We placed someone in 16 days because the candidate was already in our network from a different search that didn’t close. The fee was $27,000. The vacancy had already cost them more than that in delayed SOC 2 audit timeline alone, and the auditor had started asking questions about whether the company had adequate security staffing, which is the kind of question that can turn a routine audit into a conditional finding that rattles your board.

Realistically, how fast can an agency fill a technical role?

10 to 14 days for a qualified shortlist of 3 to 5 candidates. Not placement, shortlist. The full cycle from kickoff to accepted offer usually runs 25 to 35 days for contingency placements, which is still faster than the 44-day national average for internal hiring. Retained searches run longer, 45 to 60 days, but those are for roles where thoroughness matters more than speed. The variable that blows up every timeline, agency or internal, is the client’s interview process. We can deliver a shortlist in 10 days, but if it takes two weeks to schedule the first round because the hiring manager is in back-to-back sprints, we’re both waiting.

Can I negotiate agency fees down?

Yes, but carefully. Volume commitments get you the best leverage. If you’re sending 5 or more placements per year to the same firm, a 2 to 3 point discount on the fee percentage is standard. Going from 20% to 17% on a $130K role saves you $3,900 per hire. Below 15% you’re in dangerous territory, because the agency deprioritizes your req in favor of clients paying standard rates, and you get the B-list candidates and the slower response times. I’ve seen companies negotiate a 12% fee and then complain that the agency isn’t producing. The agency isn’t producing because at 12%, your req isn’t profitable enough to assign a senior recruiter to. The discount isn’t free.

Do we lose control of the candidate experience when we use an agency?

To some degree, yes, and it’s worth being honest about that. The first touchpoint with most agency-sourced candidates is the agency recruiter, not your brand. That recruiter is representing you, but they’re also representing themselves and their other clients. If the agency does a poor job of selling your opportunity, the candidate’s first impression of your company is already tainted before you ever speak to them. The fix is simple but most companies skip it. Do a real intake call. Not a job description email. A 30-minute conversation where the agency recruiter asks hard questions about culture, comp, team dynamics, interview process, and deal-breakers. The agencies that don’t insist on an intake call are the ones that send you irrelevant resumes for three weeks.

At what point should we just build our own recruiting team?

When three things are true at the same time. You’re consistently making 12 or more hires per year. The volume is predictable enough that you won’t have a recruiter sitting idle for full quarters. And at least 60% of your roles are in skill sets where inbound applicants or basic LinkedIn sourcing will produce a viable pipeline. If all three of those are true, build internally, invest in the tools and the employer brand that make your recruiter’s job easier, and keep an agency relationship on standby for the 20% to 30% of roles that break the internal model because the candidate pool is too small or the timeline is too tight or the search needs to stay confidential. If any of those three conditions is false, the agency model is probably your primary play, supplemented by a part-time or freelance recruiter during peak periods. The worst outcome, and I’ve watched it happen at two different mid-market SaaS companies in the last 18 months, is building a recruiting team sized for 20 hires a year, watching demand drop to 6 after a budget freeze, and carrying $180,000 in fixed recruiting cost through three consecutive quarters where the team has almost nothing to do but run employer branding projects that nobody asked for.

Making the Call

The in-house versus agency decision isn’t a philosophy. It’s arithmetic with some judgment calls mixed in. Run the real numbers, including the costs most comparison articles leave out. Match the model to your actual hiring pattern, not the one you’re planning for. And be honest about which roles your internal team can close and which ones need outside help.

Most companies making between 8 and 20 hires a year land on a hybrid model. Internal for the repeatable roles. Agency for the hard ones. That’s not a compromise. It’s the approach that matches the math for most mid-market tech organizations once you stop pretending either model works perfectly across every role type.

If you want to talk through which roles in your pipeline would benefit from agency support, reach out to our team. We’ll walk through the math with you and flag the roles where we’d actually add value versus the ones where you’re better off running internally.