Short answer: Time to Fill measures how long a vacancy stays open – from the day the requisition is approved to the day a candidate accepts the offer. Time to Hire measures how fast a candidate moves – from the day they enter your pipeline to the day they accept. Fill is a business/capacity metric; Hire is a process-speed and candidate-experience metric. Time to Hire is always ≤ Time to Fill for the same hire, and confusing them makes your recruiting reports look either much better or much worse than reality.
One hire, both clocks
Follow a single requisition for a support engineer:
| Date | Milestone | Clock Status |
|---|---|---|
| Mar 3 | Requisition approved | Time to Fill clock STARTS |
| Mar 10 | Job posted | 7 days lost to JD approval & posting |
| Mar 24 | Deepa applies | Time to Hire clock STARTS |
| Mar 27 | Recruiter screen | |
| Apr 3 | Technical interview | |
| Apr 10 | Panel + manager round | |
| Apr 15 | Offer extended | |
| Apr 21 | Deepa accepts | BOTH clocks STOP |
- Time to Hire = 24 Mar → 21 Apr = 28 days (the candidate’s journey)
- Time to Fill = 3 Mar → 21 Apr = 49 days (the business’s wait)
The 21-day gap between the two numbers is itself diagnostic. It’s made of pre-candidate time: JD wrangling, approval loops, posting delays, and the sourcing window before the eventual hire showed up. A long Fill with a short Hire means your process is fine but your sourcing or approvals are slow. A long Hire means the funnel itself drags – interviews spread over weeks, slow feedback, slow offers. Same total, completely different fixes. Measure both: Time to Fill Calculator · Time to Hire Calculator.
Definitions vary – pick one and write it down
Part of the confusion is that published definitions genuinely disagree. Some sources start Time to Hire at application; others at first recruiter contact; a few start Time to Fill at job posting rather than requisition approval. None of them is “wrong” – but mixing definitions makes your numbers incomparable across months and meaningless against benchmarks.
Our recommendation (and what SmallHRTools’ calculators use):
| Metric | Starts | Stops |
|---|---|---|
| Time to Fill | Requisition approved | Offer accepted |
| Time to Hire | Candidate enters pipeline (applies, or is first contacted if sourced) | Offer accepted |
Both stop at offer accepted, not offer sent – negotiation and hesitation time is real time, and it’s often where deals die (see your Offer Acceptance Rate if the gap between sent and accepted is chronic). Document your start/stop rules in one paragraph in your ATS or HR handbook. Consistency beats correctness here.
Benchmarks
Cross-industry surveys put average Time to Fill around 40-45 days, with wide spread by role:
| Segment | Typical Time to Fill | Typical Time to Hire |
|---|---|---|
| High-volume / hourly / retail | 14-25 days | < 15 days |
| Mid-level professional | 35-50 days | 15-30 days |
| Senior engineering / specialised | 50-70 days | 30-45 days |
| Executive search | 90+ days | 45+ days |
Treat these as directional. The more useful benchmark is your own trailing median by role family – a 55-day fill for a niche ML role can be excellent while a 55-day fill for a support agent is a process failure. Batch mode in the Time to Hire Calculator gives you median and spread from your last 10-20 hires in a couple of minutes.
Which one should you report?
Report both, to different audiences:
- Time to Fill → leadership and finance. It answers “how long will that seat be empty?” – which drives revenue coverage, team overload, and the vacancy costs we modelled in the turnover-cost post. Fill time is also the number that headcount planning needs: if fills take 50 days, requisitions must open 50 days before the need. (Headcount Planning Calculator.)
- Time to Hire → the recruiting team and hiring managers. It answers “how fast does our funnel move a candidate?” – the lever recruiters actually control. Feedback SLAs, interview scheduling, and offer turnaround all show up here, and it’s the number candidates feel.
The anti-pattern is reporting only one. Fill-only reporting blames recruiters for approval delays they don’t control; Hire-only reporting hides three weeks of pre-posting bureaucracy from leadership entirely.
Reducing each number – different levers
To cut Time to Fill (the pre-candidate segment):
- Pre-approved JD templates per role family – the Mar 3→10 week in our example is pure template debt.
- Evergreen requisitions and warm pipelines for roles you hire repeatedly.
- A requisition SLA: approval to posting in 48 hours.
To cut Time to Hire (the funnel segment):
- 24-hour interviewer feedback SLA – elapsed hiring time is mostly waiting, not interviewing.
- Book the next round at the moment the previous one passes, not by email round-trips days later.
- Compress rounds: a half-day onsite beats four interviews across three weeks, and top candidates are off the market in ~10 days.
- Pre-approve the offer band so the offer goes out the day the debrief ends.
If your recruiters are simply overloaded, no SLA will save you – check load per recruiter against the Recruiter Capacity Calculator before blaming the process.
FAQ
Can Time to Hire exceed Time to Fill? Not for the same hire, using consistent definitions – the pipeline-entry date can’t precede requisition approval by definition of the vacancy. If your numbers show it, a candidate from an old pipeline was attached to a new requisition; decide how your policy handles re-engaged candidates.
Calendar days or working days? Calendar days for external benchmarking (surveys use them); working days for internal SLAs. Both calculators support either – just don’t mix them in one report.
What about internal transfers? Count the fill (the seat was empty and is now filled) but track internal fills separately – their Time to Hire is structurally shorter and inflates your average if blended.
Is a very short Time to Fill always good? Mostly, but check quality-of-hire (90-day attrition, hiring-manager satisfaction) alongside. A fast fill that leaves in four months costs more than a slow fill that stays – that’s the turnover math again.
Calculators referenced: Time to Fill · Time to Hire · Offer Acceptance Rate · Recruiter Capacity · Headcount Planning · Cost Per Hire. Benchmark ranges are directional, drawn from published cross-industry surveys; your own trailing medians by role family are the benchmark that matters.
