Updated: June 2026 · By Álvaro ArrescurrenagaCEO of Voicit
When an important vacancy needs to be filled, the same question almost always arises: do we do it with our own staff? internal teamWe hired a headhunter or we leave it in the hands of a external consultantThere is no single answer: each model is best suited to a certain type of profile, budget, and timeframe, and making the wrong choice is costly.
In fact, a bad hire can cost around 30% of annual salary of that position, according to the U.S. Department of Labornot to mention the time lost and the impact on the team. This guide doesn't explain "how to recruit"—for that, you have our step-by-step recruitment process—, but it helps you to decide which model to use in each situation, with a breakdown of costs, times and a clear decision framework.
- The 3 selection models
- Headhunter, executive search, consulting, ETT and RPO
- Comparative table
- How much does each model cost?
- Time-to-hire and quality
- When to use each model
- Hybrid models by company size
- How to decide in 4 questions
- Mistakes when choosing a model
- The role of AI in any model
- Actionable summary
- Frequently Asked Questions
The 3 selection models, in detail
Internal (in-house) recruitment
Your own HR team or managers handle the selection process from start to finish: job definition, screening, interviews, and closing. It offers the maximum control of culture and employer branding, and the lower cost per hire in the long term. Its limits: It depends on the team's capacity and network, and for very scarce or managerial profiles it may fall short. When to avoid it: when you have a peak that your team can't handle or you're looking for a profile that you can't reach.
Headhunting (executive search)
Search direct and proactive of talent that is not actively being sought, usually for executive, highly specialized or confidential profilesIt is carried out by specialized firms or consultants who approach passive candidates one by one, discreetly. Its advantage: access to people who would never respond to an offer. When to avoid it: for high-volume or junior vacancies, where the cost does not compensate.
External recruitment consultant / RPO
You outsource all or part of the process to an agency. Ideal for hiring peaks, volume, or lack of own team. He RPO (Recruitment Process Outsourcing) is its most integrated version: it acts as an extension of your HR, and can be full (the whole process), selective (some phases) or on-demand (per project). Its limit: Less brand and culture control if not well coordinated.
Headhunter, executive search, consultancy, temporary employment agency and RPO: are they the same?
They are used as synonyms, but they are not. This table clarifies the entities:
| Term | What is |
| Headhunter / talent scout | Professional who seeks out and approaches passive candidates for a specific position, usually managerial. |
| Executive search | The discipline (and firms) of headhunting for senior management, almost always in the form of retained. |
| Recruitment consultant | Agency that manages selection processes, including volume and active candidates; may also offer search. |
| Temporary employment agency (ETT) | You provide temporary workers; the person is hired by the temporary employment agency, not by you. |
| RPO | Outsourcing the selection process as an extension of your HR (full, selective or on-demand). |
Comparative table: cost, time and profile type
| Model | When it fits | Typical cost | Time | Advantage | Limit |
| Internal recruitment | Continuous volume, junior-mid profiles, focus on culture | Cost of equipment + tools (low due to long-term contracting) | Variable (depending on equipment load) | In-depth knowledge of the company and culture | Limited by the team's capacity and network |
| Headhunting | Executives, scarce or confidential profiles | High: usually around 20-33% of gross annual salary | Weeks to months | Access to passive candidates and discretion | High cost; not cost-effective for mass vacancies |
| Consultant / RPO | Peaks, volume, no own equipment, or urgency | Medium: by contract or monthly fee (RPO) | Fast (network and processes already set up) | Capacity and speed without expanding staff | Less brand and culture control if not coordinated |
How much does each model cost? Actual breakdown
The cost isn't just the supplier's price; it includes your team's time and the risk of error. In short:
- Internal: The "invisible" cost of your recruiters' and managers' time, plus tools (ATS, job postings). The average cost per hire is around, according to SHRM, several thousand euros per vacancy, but it gets diluted if you hire a lot.
- Headhunting: fees of 20-33% of gross annual salary of the position. In modality retained (Exclusive, for management) is usually paid in thirds: upon signing, upon submitting the shortlist, and upon joining. contingency (success-based) you only pay if you hire someone.
- Consultant / RPO: per hiring (a fee for each addition) or a monthly fee in RPO. It's worthwhile when the volume is high or you don't have equipment.
| Model | Payment method | Relative cost | When does it pay off? |
| Internal | Team time + ATS + offers | Low hire if there's volume | Ongoing hiring |
| Headhunting | 20-33% of annual salary (retained/contingency) | High | Limited leadership and profiles |
| Consulting firm | Hiring fee | Half | Temporary vacancies or vacancies without equipment |
| RPO | Monthly fee / per FTE | Medium (scale with volume) | Peaks and stable outsourcing |
Time-to-hire and quality: speed versus accuracy
Two metrics govern this decision: the time-to-hire (how long it takes you to fill the position) and the quality of hiring (how well it fits in the medium term).
- Speed: A consultancy or RPO is usually the fastest option (they already have a network and established processes). Headhunting, by its very nature of direct search, is the slowest, especially for management positions.
- Quality/cultural fit: The internal team is usually more accurate in terms of culture because they know the company; headhunting provides quality in scarce profiles where the internal team cannot reach.
- The cost of failure rules: If making a mistake in that position is very expensive (a director, a critical profile), investing in headhunting or a more careful process pays for itself.
When to use each model
Choose internal recruitment if…
- You hire continuously and you have an HR team.
- Culture and employer branding are priorities.
- You are looking for junior or intermediate profiles with a certain number of candidates.
- You want to minimize the cost of long-term hiring.
Choose headhunting if…
- Are you looking for a managerial, highly technical, or scarce profile?
- The process must be confidential (e.g., replacing someone).
- Ideal candidates don't respond to offers: you have to go after them.
- The cost of not filling the position properly is very high.
Choose an external consultant / RPO if…
- You have a hiring peak or a one-off project.
- You don't have a selection team or it's overloaded.
- You need speed and capacity without expanding your staff.
- You want to outsource part of the process (screening, initial interviews).
Hybrid models: how to combine them according to company size
In practice, the most efficient approach is usually combine models. A typical hiring stack:
- Startup (without an HR team): Founders + ad hoc consultant for key profiles; headhunting only for one critical management position.
- Scale-up: Internal team for the bulk of vacancies + RPO for growth peaks + headhunting for the management layer.
- Corporation: Powerful internal talent acquisition + executive search for senior management + selective RPO in volume campaigns.
If you are a freelancer or recruitment consultant, this guide will help you. AI-powered recruitment for freelancers You'll see how to compete with larger structures.
How to decide in 4 questions
Executive/scarce/confidential → headhunting. Junior-mid-level with offer → internal or consultancy.
Peak or urgent situation without a team → consultant/RPO. Continuous flow → internal.
Yes → internal (supported by AI). No → consultancy or headhunting depending on the profile.
High demand (management, critical profiles) → headhunting. Feasible demand → internal/consulting firm.
Errors in choosing a selection model
Paying management fees for high-volume vacancies burns through budget unnecessarily.
If the consulting firm doesn't know your culture, they'll get the CV right but fail to find the right fit.
The real cost includes your team's time and the risk of a bad hire (~30% of salary).
Without time-to-hire or quality of hiring, you don't know which model works best for you.
Comparing interviews "from memory" leads to bias; document and structure each one.
The role of AI in any of the three models
Whichever model you choose, the quality of the decision depends on How do you document and compare candidates?Here, AI helps internal teams, headhunters, and consultancies alike: instead of taking notes by hand during the interview, a tool like Voicit It records it—in person or via video call, without bots—and generates a structured interview report with skills, experience and conclusions, saving up to 80% of the time editorial staff.
This allows for comparing candidates using homogeneous criteria—reducing bias. evaluate "memorized" responses— and deliver to the client or manager a selection report robust, whatever the model. AI also accelerates specific phases that are usually outsourced, such as CV screeningFor consultancies and headhunters, it's a way to professionalize delivery; for internal teams, it's a way to... strengthen your talent acquisition without expanding the workforce. And, in any case, it's advisable to support it with a good interview methodology.
Actionable summary
- ✅ Executive/scarce/confidential profile → headhunting (executive search).
- ✅ Continuous volume + culture → internal, supported by AI.
- ✅ Peak, emergency, or no equipment → consultant / RPO.
- ✅ Combine depending on your size (startup / scale-up / corporation).
- ✅ Measures time-to-hire and qualitynot just the supplier's price.
- ✅ Document each interview using consistent criteria to make better decisions.
Frequently Asked Questions
What is the difference between headhunting and a recruitment consultancy?
Headhunters proactively seek out passive candidates for executive or scarce positions, with discretion. A recruitment consultancy manages larger processes (including high-volume recruitment) and typically works with proactive candidates, although it may also offer search services.
What is the difference between headhunting and executive search?
They are practically the same: executive search is the term for headhunting for top management, almost always on a retained basis (exclusive and paid in stages). "Headhunting" is used more broadly.
How much does a headhunter cost?
It typically bills between 20% and 33% of the position's gross annual salary. In retained contracts, payment is made in phases (upon signing, upon submitting the shortlist, and upon onboarding); in contingency contracts, payment is only made upon hiring.
Which is better: a recruitment consultancy or an in-house team?
It depends. An in-house consultant is more accurate in terms of culture and is cheaper in the long run if there's volume; a consultancy provides speed and capacity to handle peak periods or when you don't have a team. Many companies combine both.
How long does it take to fill a position with each model?
Consulting firms and RPOs are usually the fastest because they have established networks and processes. Headhunting is the slowest due to the direct search, especially for management positions. Internal recruitment depends on the team's workload.
What is the difference between a headhunter and a temporary employment agency?
The headhunter finds a candidate for you to hire, usually for a skilled and permanent position. A temporary employment agency (ETT) provides workers temporarily and is the one who hires them.
What is RPO?
RPO (Recruitment Process Outsourcing) is outsourcing all or part of the selection process to a provider that acts as an extension of your HR department. It can be full, selective, or on-demand.
Can a small business afford a headhunter?
Yes, but it's best to reserve it for the position where it's hardest to make a mistake (usually a managerial or critical one) and use more economical models for the rest of the vacancies.
CEO and co-founder of Voicit. He works weekly with recruitment consultancies, headhunters, and HR teams.
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