Which recruitment KPIs are suitable for hard-to-find candidates?

You can post the same vacancy across two teams and see completely different results: one team fills the role quickly with a steady influx of candidates, whilst the other spends weeks trying to get “more responses” without ever actually hiring anyone. When it comes to hard-to-find roles, the problem rarely lies with a single setting in your campaign. It’s down to your metrics: if you use KPIs that primarily reward volume, you’ll be heading in exactly the wrong direction when roles are in short supply.

Why standard recruitment KPIs are misleading in times of labour shortages

Many organisations measure recruitment as if every role were a marketing funnel that you can simply make bigger. As a result, KPIs such as “number of applications” or “cost per applicant” take centre stage, whilst the real bottleneck often lies further down the process: availability, speed of follow-up, persuasiveness, or confidence in the selection.

Scarcity changes the game. You focus less on abundance and more on certainty: will you even manage to get suitable candidates to talk to you, and will you actually be able to bring them on board?

That is why Recruitment KPIs for hard-to-find roles in particular KPIs that increase the likelihood of successful enrolment, rather than KPIs that merely report on activity.

A logical KPI framework: from scarcity to guidance

Start with one question: Why is this profile in short supply here? Is it a lack of vacancies in the region, fierce competition over employment terms, a long commute, shift work, or a recruitment process that is too demanding?

You then select KPIs that reflect that reality. In practice, four KPI categories work well: reach & interest, speed & process quality, selection quality, and intake reliability.

Block 1: Reach and interest (but with a focus on candidates)

When there’s a shortage, the question “how many people saw the job advert?” doesn’t tell you much. You want to know whether you’re reaching the right target audience and whether your message is credible.

• Qualified reach: reach within the relevant target group (e.g. job role, region, sector) rather than total reach.
• Click-to-apply rate: the percentage of clicks that actually result in an application (an indication that the message matches expectations).
• Apply completion rate: percentage of applicants who complete the application form (indicating friction, unclear questions or a form that is too long).
• Inbound enquiries per week: the number of relevant candidates who respond or make contact (applications plus conversations).

Please note: these KPIs are useful if you break them down by channel and by target audience segment. Otherwise, you’ll waste resources and fail to identify the real cause.

Block 2: Speed and process quality (the real benefit when resources are tight)

In tight markets, speed is often the difference between getting off the ground and hearing “I’ve already found something else”. That’s not just a gut feeling; it’s a fact of the process. Here, you want KPIs that push your team to pick up the pace without becoming reckless.

• Time to first response: time between an application/lead and the first personal response. Aim for hours, not days.
• Time for the interview: time until the first consultation (including the telephone intake).
• Time between stages: processing time per stage (intake → interview → second round → offer). This is where “silent weeks” often occur.
• Interview no-show rate: the percentage of candidates who fail to turn up. This is often a sign of poor follow-up or low engagement.

Combine this with a simple best practice: if a hiring manager only provides feedback after five days, you cannot improve the “time to hire” by increasing your advertising spend.

Block 3: Quality of selection (making decisions based on evidence, not on luck)

A shortage of players tempts teams to make concessions. In that situation, “hiring quickly” seems like a good idea, until you find yourself starting all over again after six weeks because the team isn’t right.

So don’t just measure speed; measure the quality of your selection as well. Practical KPIs:

• Shortlist ratio: How many candidates do you need to interview to find one serious contender? This will help you refine your shortlist.
• Offer rate: the percentage of candidates interviewed who receive a job offer. Too low = poor targeting or poor initial screening; too high = selection process may be too lenient.
• Hiring manager satisfaction (structured): a brief assessment after each recruitment process, focusing on job suitability, independence and ability to learn.
• Quality of hire after 90 days: a simple assessment (e.g. 1–5) of output and behaviour, linked to the criteria in your scorecard.

This works best if you conduct interviews using a standardised assessment tool. A structured interview and a scorecard make it possible to measure which indicators were predictive. This ties in with How to conduct a structured interview in 8 steps and on Create a selection scorecard for hiring managers.

Block 4: Security of supply (where shortages often occur)

When it comes to hard-to-find roles, the biggest frustration isn’t “we can’t recruit anyone”, but “we thought he’d start and then…”. That’s why you want KPIs that increase certainty from the moment you’ve identified a candidate.

• Offer acceptance rate: the percentage of offers that are accepted.
• Time to make an offer: the time between the last conversation and the offer. A delayed offer is a gift to competitors.
• Pre-start dropout rate: the percentage of candidates who, after being accepted, still withdraw before the start date.
• Start-to-90-day retention: drop-out within the first 90 days (often due to a mismatch, onboarding or expectations).

If your pre-start dropout rate is high, you usually have a problem with expectation management or the candidate experience. Sometimes it’s simply a matter of there being too little contact between signing up and starting.

Which KPIs make sense for each type of scarcity?

The same set of KPIs does not work for every type of scarcity. The table below helps you link KPIs to the most common causes, so that you don’t optimise blindly.

Pitfalls: KPIs that are best defined differently

Some KPIs aren’t “bad”, but they can be dangerous if you use them as they are when there is a shortage of candidates. Three that often backfire:

1) Cost per application (CPA)

When there’s a shortage of candidates, a low CPA can mean you’re mainly attracting a lot of unsuitable applicants. That might seem cheap, but it takes up time and creates confusion for hiring managers.

You’d better make it cost per qualified lead or cost per shortlisted candidate from.

2) Number of job applications

More is not necessarily better. For hard-to-find roles, “two to four good candidates a month” is often more valuable than 40 mediocre applications.

This ties in with the idea of streamlining the selection and shortlisting processes, so that your team only spends time on genuine candidates. This is also why many organisations sabotage themselves with the mistakes made in These 4 mistakes are costing you your best candidates include, in particular, sluggishness and jumping to conclusions.

3) Time to hire as the sole speed KPI

Time to hire is a performance metric. If you only measure it, you won’t know where to take action.

Break it down into time to first response, time for the interview and time to bid. That way, you can make targeted improvements.

How to make KPIs workable without turning them into a circus

A set of KPIs is only useful if your team can use them to drive performance on a weekly basis. In practice, this works well for roles where there is a shortage of suitable candidates:

• Choose up to 6 key KPIs by job category (e.g. fitters, operators, sales staff).
• Assign one person to be responsible for each KPI (recruitment, hiring manager or marketing), so that tasks do not get left undone.
• Place pre-determined decision-making rules fixed (cut-off marks, minimum scores, interview slots), otherwise you’ll end up having to negotiate with your own process afterwards.
• Discuss KPIs on a regular basis (weekly) and link them to specific actions.

If you’re looking for a single external reference to help you fine-tune your lead times and process steps, then the labour market information from Statistics Netherlands (CBS) a reliable source for monitoring developments in labour shortages and employment, and for substantiating the urgency of the matter internally.

A gentle next step that actually helps

If you have hard-to-fill vacancies, the quickest way to improve the situation is often not to “do more”, but to “measure things differently”. Choose one role where there is a shortage of candidates, set up the KPI framework, and spend four weeks identifying which bottleneck is the biggest.

If you’d like to have a chat about which Recruitment KPIs for hard-to-find roles If you’d like to understand how your roles fit together, or how to link them to a data-driven campaign and a more rigorous pre-selection process, a short session is often a good option. FosFor supports organisations with target audience data, labour market insights and guidance throughout the process, ensuring you speak to the very best candidates and make a confident hire more quickly.