You have finally approved the budget for a new hire. The job description is ready, the team is waiting, and then the applications start arriving: a crowded inbox, a few promising CVs, and plenty of people who seem to have applied by accident.
Three weeks later, the role is still open. Your manager is asking for updates, your team is covering the gap, and you are wondering whether an outside recruiter might have solved the problem already.
That is usually the moment businesses start calling recruitment agencies. It is also the moment to slow down slightly. The right agency can bring specialist knowledge, useful candidates, and a much faster process. The wrong one can send irrelevant CVs, blur the terms of the agreement, and leave you paying for a hire that does not work out.
In 2025, 69% of organisations reported difficulties hiring for full-time roles. Choosing an agency on the basis of a friendly sales call alone is not enough. You need to test how well it understands your market, how it measures performance, and what happens after a candidate accepts the offer.
Start with the hiring problem, not the agency shortlist
Before speaking to recruiters, define what you actually need help with. Are you looking for one permanent employee, a temporary team, an interim specialist, or a contractor for a fixed project? Those are different services, with different fee structures and different measures of success.
Private agencies placed 2.5 million people into permanent employment worldwide in 2024 and another 58.4 million into temporary work. The scale of the industry is enormous, but the numbers also show why labels matter. Permanent placement, temporary staffing, and contract recruitment are not interchangeable products.
An agency that excels at supplying warehouse staff may not be equipped to find a senior software engineer. A firm known for executive search may be unnecessarily expensive for a group of entry-level hires. Write down the role, expected start date, salary range, location, working arrangement, and the skills that genuinely cannot be compromised. This gives every agency the same brief and makes their proposals easier to compare.
Think about the level of market knowledge you need, too. If you are hiring for a common role in a major city, broad reach may be enough. If you need a regulatory specialist, a bilingual sales leader, or an engineer with experience in a narrow technology, industry access matters more than a large database.
A good recruiter should ask sharp questions at this stage. They should want to understand why the role is open, what has made previous hires succeed, and which candidates tend to leave. If the conversation stays focused on sending CVs as quickly as possible, be cautious.
Test whether their specialism is real
Ask the agency how many similar roles it has filled recently. Not vaguely similar roles. Similar roles in your sector, at your level of seniority, and in a comparable labour market.
The answer should include enough detail to be useful without revealing confidential information. You might ask about typical candidate backgrounds, salary expectations, hiring timelines, and the reasons offers are accepted or rejected. A specialist agency will usually have clear observations. It may tell you that a particular title is outdated, that your salary is below the current market, or that candidates expect a different working pattern than you offer.
That kind of practical challenge is valuable. You are not paying an agency merely to forward profiles you could find yourself.
The agency should also be able to provide relevant performance evidence. Large recruitment datasets can show broad patterns, but your decision should rest on results connected to your situation. One major analysis reviewed almost 90 million applications for 1.5 million jobs across 95 countries. That kind of scale is useful for understanding recruitment trends, yet it does not prove that a particular agency can fill your vacancy in your city or industry.
Ask for its own figures: shortlist-to-interview ratio, interview-to-offer ratio, offer acceptance rate, average time to fill, and retention after placement. Check how those figures are calculated. An agency can claim a fast placement by counting from the moment a candidate enters its database rather than from the date the vacancy was briefed.
The average time to fill executive and non-executive positions was approximately one and a half months in 2025. Treat that as a reference point, not a promise. Your role may be harder, your approval process slower, or your location less competitive. The useful question is whether the agency can explain its own benchmark and what it will do if the search falls behind it.
Ask what happens between the first search and the first day
Recruitment is not a magic act performed behind a curtain. You should understand the process from the first conversation with a candidate to the final reference check.
Ask where candidates come from. Are they found through advertising, direct outreach, referrals, an internal database, or a mixture of methods? How does the agency assess technical skills? Who conducts the first interview? How does it check that a candidate is interested in your actual role rather than simply exploring the market?
AI is now part of that process for many firms. Recruitment using AI was 26% faster in 2025, but speed alone says very little about quality. Ask precisely how the agency uses automation. Does software search CVs, rank candidates, write messages, schedule interviews, or screen applications? At which points does a person review the decision? How can a candidate challenge an inaccurate profile?
You do not need a technology lecture. You do need a straight answer. If the recruiter cannot explain why a candidate was selected, the process may be too opaque for an important hire. Human judgement should still have a visible role, particularly when a career history does not fit neatly into a keyword search.
Pay attention to communication promises. Will you have one dedicated consultant or several people working on the assignment? How often will you receive updates? Who handles feedback after interviews? A weekly message saying no suitable candidates have appeared is not helpful unless it also explains what the agency has tried and what will change next.
I once watched a hiring manager spend more time chasing an agency for basic updates than she would have spent contacting candidates herself. The problem was not the lack of activity; it was the lack of ownership. Make sure you know who is accountable for moving the search forward.
Compare the contract, not just the commission
Fees matter, especially for senior roles, but the lowest percentage is rarely the whole story. The cost of recruiting executive positions rose by 21% in 2025 compared with 2022 and by 113% compared with 2017. A small difference in commission can be outweighed by a weak replacement guarantee or an awkward payment schedule.
Ask whether the agency works on contingency, retained search, or a hybrid model. Clarify when invoices are issued, whether the fee is based on base salary or total compensation, and what happens if the candidate leaves during probation. Some agreements offer a replacement search; others provide a partial refund. The duration and conditions of the guarantee matter more than the reassuring word guarantee on its own.
Read the details about exclusivity. An agency may request exclusive access to the vacancy for a set period, which can be reasonable if it is investing significant time and specialist resources. It becomes less attractive if the agency has no clear delivery plan or if you cannot end the arrangement when progress stalls.
Check ownership clauses as well. If your team has already spoken to a candidate, or another agency introduces the same person later, the contract should explain who is entitled to a fee. Also look at data protection responsibilities, candidate consent, background checks, and the handling of confidential information.
A good agreement leaves little room for creative interpretation. If the recruiter resists reasonable questions before you sign, imagine how difficult the conversation might become after a candidate has accepted an offer.
Look for a working relationship your managers can sustain
The final choice often comes down to fit, but that does not mean choosing the recruiter you simply like most. Choose the one whose working habits match the way your business makes decisions.
If your hiring managers need detailed evidence, select an agency that reports clearly. If roles change quickly, find a recruiter who can adapt without treating every adjustment as a new project. If your employer brand is still developing, choose someone who can present the opportunity honestly rather than making promises your business cannot keep.
Speak with the consultant who will actually handle the search, not only the person who sold the service. Ask how many active vacancies they manage and who covers their work during holidays or sickness. Request references from clients with comparable hiring needs, then ask those clients whether the agency sent relevant candidates, communicated bad news promptly, and honoured the contract.
Before signing, agree on a short written brief, a realistic timeline, the reporting schedule, interview responsibilities, the definition of a qualified candidate, and the terms for ending the assignment. You should know what success looks like before the first CV arrives.
The best agency will not promise a perfect hire in record time. It will show you where the market is difficult, explain the trade-offs, protect your time, and give you enough information to make a sound decision. That is a much better sign than a polished presentation full of impressive but irrelevant numbers.