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Cost-per-hire: how to calculate it honestly, and where it actually drops
Most teams underestimate what a hire costs because they count the invoices and forget the hours. Here's the honest formula, the hidden costs, and the levers that move it.
The biggest line in cost-per-hire is almost never an invoice. It's the hours your team spends, which is exactly the part nobody tracks.
The honest formula
Cost-per-hire is the total recruiting spend over a period divided by the number of hires in that period. Simple, until you ask what counts as spend. The honest version includes both external costs (job-board postings, agency fees, tools, assessments, travel) and internal costs (the hours recruiters, hiring managers and interviewers pour in, valued at their loaded salary). Most published figures quietly drop the internal hours, which is why they look suspiciously low.
Walk through a single hire: hours writing and posting the ad, hours screening, multiple interviewers times multiple rounds, debriefs, reference calls, offer back-and-forth. For a mid-level role that's easily dozens of person-hours, and senior people's time is expensive. This is why a "cheap" hire sourced for free can cost more than a paid one: the free channel flooded you with weak applicants and your team spent forty hours sifting. Counting only the invoice hides your single largest cost.
Where cost-per-hire actually drops
Because time dominates, the biggest savings come from spending fewer hours per hire, not from cutting job-board budget. Three levers: better sourcing (a channel that sends fewer, more relevant applicants beats a cheap firehose), faster decisions (a dragged-out funnel burns interviewer hours and loses candidates you then re-recruit), and reuse (a talent pool or an internal referral skips the top of the funnel entirely). Chasing the cheapest posting while ignoring the hours is optimising the small number and ignoring the big one.
Track it without a side spreadsheet
Cost-per-hire is only useful if you measure it per channel and per role, otherwise you can't see which source is secretly expensive. The inputs you need, applications per source, time in each stage, hires per source, already live in your applicant tracking system as a by-product of running the process. KI BMS records the source and the stage history on every application, so the funnel data that feeds a real cost-per-hire is there without a parallel tracking sheet. Measure per source, kill the channels that look cheap but cost hours, and the number falls on its own.
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