Recruitment process outsourcing (RPO), model by model
Recruitment process outsourcing is a form of business process outsourcing where an employer hands all or part of its recruiting to an external provider. What separates it from an agency is ownership: the provider designs and runs the process and carries responsibility for the results, under your employer brand.
What recruitment process outsourcing (RPO) is
Recruitment process outsourcing (RPO) A form of business process outsourcing where an employer transfers all or part of its recruitment processes to an external service provider, as the RPO Association defines it.
People also call it outsourced talent acquisition. The provider may bring its own staff, technology, methods and reporting, or run yours. Either way it assumes ownership of the process, which is the line between outsourcing recruitment and simply buying candidates.
RPO, an agency and retained search are 3 different purchases
| RPO | Staffing or recruiting agency | Retained executive search | |
|---|---|---|---|
| What you are buying | A recruiting function, designed and run for you, across a set of roles. | Candidates for a named opening, supplied against your own process. | A search for one senior seat, run to a brief you agree first. |
| Who owns the process | The provider. RPOA states it assumes ownership of process design and management, and responsibility for results. | You do. The agency supplies people into it. | The firm owns the search; you own the hiring decision and the process around it. |
| How it is paid | A management fee, a fee per requisition opened and filled, or a blend of the 2. | Usually a fee on placement, contingent on the hire happening. | A retainer billed in instalments over the search. See our executive search guide. |
| When it fits | Repeating volume, several functions, or a function with no recruiting capacity at all. | A gap you can name, a role at a time, when your process already works. | One confidential or board-level appointment where the shortlist matters more than the speed. |
Why the model names never match between providers
Read 4 provider sites and you get 4 vocabularies. Cielo publishes 5 models, KellyOCG 4, Wilson 5 plus an admin option, and Hudson 3. The RPO Association names 4 families of its own. Enterprise RPO is the one term all 3 of Cielo, KellyOCG and Hudson use. Almost nothing else lines up.
So compare 2 things and ignore the label: the scope, line by line, and the fee mechanism. A model name is a sales category. What you are buying is a list of activities and a way of paying for them, and both belong in the statement of work.
The 3 things you are actually choosing between
| What you outsource | What providers call it | What the provider owns | When it fits |
|---|---|---|---|
| The whole function | Enterprise RPO (Cielo, KellyOCG, Hudson); Strategic RPO (Wilson); Full Talent Lifecycle (RPOA) | Design and delivery end to end. KellyOCG describes its enterprise model as managing every stage from sourcing to onboarding. | Sustained hiring across business units or regions, with no internal team able to carry it. |
| Part of the function | Modular RPO (KellyOCG, Wilson); Hybrid RPO (Cielo, KellyOCG); Hybrid or Staff Augmentation (RPOA) | One layer. Wilson describes isolating a part of the process, such as sourcing candidates and talent mapping. | Your team is fine at closing and weak at finding, or the reverse. Keep the half that works. |
| Extra hands for a while | Project RPO (Cielo); Project and On-Demand RPO (Hudson); Recruiter on Demand (KellyOCG); Agile RPO (Wilson) | Delivery only, inside your process. KellyOCG says you keep control over process and outcome. | A funding round, a new site, a backlog with an end date. You want the capacity, not the redesign. |
What an RPO provider actually takes over
- Employer brand work and attraction, including what goes out under your name
- Candidate sourcing, including outbound to people who never applied
- Screening and assessment, and who sets the bar that screening applies
- Interview scheduling and coordination across your managers
- Offer administration, including who drafts and who approves
- Onboarding handover to HR, and where it stops
- Compliance and candidate records, which Hudson lists inside RPO scope
- Reporting: what you get weekly, and in whose system it lives
The 3 fee mechanisms, and what each one rewards
| Fee model | How it works | What it rewards, and what it does not |
|---|---|---|
| Management fee | A monthly or hourly fee covering staff costs, technology, sourcing, account management and overhead. | Buys capacity and predictability. It rewards nothing in particular about outcomes, so the service levels have to do that work. |
| Pay for performance | An open fee on each requisition, then a close fee once the job is filled. | Rewards filling requisitions, which is not the same as filling them well. Define quality and the probation window, or you are buying speed. |
| Hybrid or blended | Fixed monthly fees combined with per-placement charges. | Splits the difference, and splits the incentive. Worth it when volume is steady enough to forecast the fixed half honestly. |
Whose brand is on the outreach
An outsourced recruiter emails candidates under your name, not theirs. That is the point of the model, and it is why employer branding sits inside recruitment process outsourcing rather than beside it. Cielo states it protects, promotes and enhances the client's employer brand. Every provider says something similar. None of it is enforceable until it is a term.
So make brand governance a term. Agree the message templates and who may edit them, a response-time commitment for candidates who reply, who signs a rejection, and who handles a complaint that reaches your careers inbox. Ask to see the outbound copy before it sends, at least for the first month.
RPO, an in-house recruiter, an agency, or do it yourself
| RPO | In-house recruiter | Agency, per role | Do it yourself in software | |
|---|---|---|---|---|
| What you are buying | A function someone else designs and runs. | A person who learns your business and stays in it. | Supply against a role you already defined. | Tooling that does the finding and the first pass. |
| How it is paid | A management fee, per requisition, or a blend. | Salary, plus the tools and the manager's time. | On placement, per hire. | A subscription, whatever your volume. |
| How fast it starts | Weeks, after a ramp and a scoping exercise. | Months to hire, then more to be useful. | Days, if the brief is clear. | Same day, if someone will actually run it. |
| When it is the right call | Forecastable volume across functions, or no recruiting capacity at all. | Steady hiring in one place, and knowledge worth keeping. | Occasional roles, or a market you cannot reach. | Low steady volume where a management fee will never pay back. |
| What you own afterwards | The hires. The process knowledge and often the tooling leave with the contract. | Everything, while the person stays. | The hire, and nothing else. | The pool, the search history and the records, in your account. |
Before you sign
An RPO provider processes your candidates' personal data and screens people on your behalf. Both of those create obligations that stay yours. The contract has to say who does the work and who is accountable when it goes wrong.
5 things to settle in the RPO contract negotiation process
- Data protection, in writing If EU or UK candidate data is in scope, GDPR Article 28 requires a binding contract with the processor and sets out what it must contain. Put that list in the agreement rather than a privacy annex nobody reads. Documented instructions, staff confidentiality, security measures, help with data subject rights, deletion or return at the end, audit information, no sub-processor without written authorisation.
- Who employs the people, and who else might The EEOC's guidance on staffing firms says that where both the firm and its client have the right to control a worker, and each meets the employee threshold, they are joint employers and both can be liable. Control in fact decides it. Write down who directs the work day to day, because the fact-finder looks at the whole relationship, not the label on the contract.
- Records, and who keeps them EEOC regulations require employers to keep personnel and employment records for 1 year. Where a charge is filed, related records must be kept until final disposition of the charge or any lawsuit based on it. Name the system of record, the retention period, and the litigation hold process, in that order.
- Automated screening, if any is used New York City Local Law 144 binds employment agencies as well as employers, which is what a provider screening on your behalf is doing. It requires a bias audit within 1 year of use, public audit information, and notice to candidates. Ask which tools touch your candidates, who commissioned the audit, and where the summary is published. DCWP began enforcing on 5 July 2023.
- The exit, written before the start Agree now who keeps the ATS records, the candidate pool, the market map and the outreach history when the engagement ends. This clause decides how much of the work survives the contract. If the provider's platform is the only place the data lives, the answer is already no.
When the shortlist is the thing you are paying for
A 1-line brief becoming structured filters, then a judged and ranked list. Example values.
What an RPO's sourcing layer really sells is reach into people who never applied. The Cognitive does AI candidate sourcing across ~900M profiles from a plain-English brief, parsed into 2 filter groups: one about the person, one about their current employer.
5 situations, and what each one should push you towards
You are opening a site or a shift pattern and need 80 people hired by a fixed date, after which hiring returns to normal.
A project or on-demand engagement, scoped to the date, not an enterprise agreement. Our high-volume hiring page covers the mechanics of running the funnel itself.
How many recruiters land on this, by name, and what happens to them in month 4?
You are hiring clinical staff and the bottleneck is not finding people, it is getting them cleared to work.
Credentialling and licensure verification is the hard part of healthcare RPO. Healthcare RPO partnerships live or die on it. See our healthcare recruiting guide.
Who performs primary verification, in which system, and who is accountable if a credential lapses?
Your engineering managers say the shortlists are full of people who do not pass the first technical conversation.
The screening layer is where the money goes. For tech RPO, who screens matters more than how many profiles arrive.
What did the person screening my engineers do before recruiting, and can I sit in on one screen?
You need a confidential replacement for a function head and the incumbent does not know yet.
This is retained executive search, not RPO. Different brief, different fee mechanism, different people doing the work.
Read our executive search firms guide first, then ask any RPO provider who actually runs the search.
You hire 2 or 3 people a quarter, nobody internally has hours for outbound, and every provider quote assumes more volume than you have.
The management fee arithmetic never closes at this volume. Running the search yourself with software is the realistic route.
Before you call anyone, cost a year of the fee against a year of doing the sourcing in house.
When RPO is the wrong call
- You hire a handful of people a year. The ramp costs more than the hiring does.
- The role is so specialised that nobody can transfer the judgement inside a ramp period.
- You cannot name 1 decision-maker per requisition who will answer the same day.
- The real problem is that managers will not interview, which outsourcing does not fix.
- Nobody has agreed what happens to the candidate data and the process when the contract ends.
Comparing shortlists, whoever built them
Per-criterion scores out of 5 and an overall out of 100. Example content.
Submittals from a provider and candidates from your own search still have to be judged on the same terms. A live AI video interview produces a scorecard: each criterion out of 5, an overall out of 100 weighted from the role's criteria, and resume claims marked verified, refuted or unclear. Take one yourself at /try-interview.
Running the engagement once it starts
Do
- Give the provider 1 named decision-maker per requisition who answers the same day
- Agree the scope line by line against the checklist above, before the first requisition opens
- Review the funnel weekly against the agreed service levels, not monthly against the fee
- Keep your own ATS as the system of record from day 1
Do not
- Judging the first month on time to fill, before the ramp has finished
- Letting the provider's platform become the only place your candidate data lives
- Running an RPO and 3 contingency agencies against the same roles
- Signing a model name when what you needed was a scope
Where to go next
Staffing and recruiting companies · Executive search firms · High volume hiring · What candidate sourcing is · The recruitment process
Frequently asked questions
What is recruitment process outsourcing (RPO)?
The RPO Association defines it as a form of business process outsourcing where an employer transfers all or part of its recruitment processes to an external service provider. The provider may supply its own staff, technology, methods and reporting, or take over yours. What makes it RPO rather than outsourcing recruitment piecemeal is that the provider assumes ownership of the process design and management, and responsibility for the results.
What is the difference between RPO and a staffing agency?
Ownership. A staffing agency supplies candidates into a process you run and is usually paid when a placement happens. An RPO provider designs and manages the process itself and carries responsibility for results, which is how RPOA draws the line. That is also why outsourcing recruitment services is priced by management fee or by requisition rather than by placement.
What is enterprise RPO?
Enterprise RPO is the name Cielo, KellyOCG and Hudson each use for the full-function model, where the provider runs recruitment end to end rather than one layer of it. KellyOCG describes its enterprise model as a full-service solution managing every stage from sourcing to onboarding. Hudson describes deploying it across an entire global enterprise or within one region, division or function. Wilson calls the equivalent Strategic RPO.
How much does RPO cost?
The fee follows 1 of 3 mechanisms: a management fee covering staff, technology and overhead; pay for performance with an open fee per requisition and a close fee on filling it; or a blend of both. The number varies by scope, volume, seniority and market. We do not publish a range, and neither should anyone who cannot show where theirs came from. Get it written into the statement of work.
Who are the best RPO providers?
We do not publish a ranking of recruitment outsource providers, because a list cannot know your functions or your volume. Cielo, KellyOCG, Wilson and Hudson all publish their own model descriptions, which is a useful place to start reading. Then test 3 things: named placements in your exact function in the last year, who runs your engagement day to day, and what the exit clause says about your data.
Is outsourced talent acquisition the same as RPO?
In ordinary use, yes. Outsourced talent acquisition and outsourcing talent are the plain-English versions of the same arrangement. RPO is the industry's own term, and the trade association defines it as a form of business process outsourcing. If a provider draws a distinction between the two phrases, ask what changes in the scope and the fee, because usually nothing does.
Does an RPO handle executive search?
Some providers will take senior roles inside a wider engagement, and some sell a separate practice for it. Retained executive search is a different product with a different brief and a different fee mechanism, and for a confidential or board-level seat it is usually worth buying separately. Our guide to executive search firms covers how those searches are scoped and billed.
Is RPO used in healthcare recruitment outsourcing?
Yes, and healthcare is one of the clearest cases for it, because clinical hiring is continuous and licensure-bound. The hard part is rarely finding candidates. It is credentialling and licensure verification, so the contract has to name who performs the verification, in which system, and who is accountable if something lapses. Ask that question before any conversation about volume.
What is an RPO platform?
The phrase covers 2 different things. One is the software an RPO firm runs its own delivery on. The other is the technology a provider brings into your engagement; Cielo, for example, names Cielo TalentCloud as its own. Either way the question that matters is the same: when the contract ends, who keeps the candidate records, the search history and the pipeline data?
Can AI replace an RPO?
Not for a buyer who needs someone to own the process and answer for the results. But AI changes what the sourcing and screening layers cost, which changes the arithmetic wherever RPO was bought mainly as capacity. The Cognitive does AI candidate sourcing from a plain-English brief, then email and SMS follow-up sent in your recruiter's name that stops when someone replies. Start free at https://app.thecognitive.io/signup.
Explore: Staffing and recruiting companies · Executive search firms · High volume hiring · Healthcare recruiting · The recruitment process