Most HVAC owners can tell you what a typical repair ticket is worth. Far fewer can tell you, to the dollar, what a missed ticket is worth. When we ran the numbers with 38 Canadian shops, the answer was stunningly consistent — and deeply uncomfortable.
A missed after-hours call is not a neutral event. It is a specific, measurable loss of revenue. And because it doesn't show up as a line item on any P&L, it quietly compounds every week until, by the end of a heating season, it has eaten a small truck's worth of income.
The per-call cost
Across the sample, the average HVAC ticket booked from an after-hours call landed between $340 and $1,280 depending on service type. Weighted by call volume, the blended average of a single missed after-hours call was $287 in immediate lost revenue.
That number assumes only the first job. Factor in the lifetime value of a retained HVAC customer — typically two maintenance visits per year plus one major service every 3-4 years — and the fully-loaded cost climbs to between $420 and $510 per missed call. Call it $450 to keep the math honest.
I always thought we lost maybe ten grand a year to missed calls. Turned out it was closer to sixty. Once you see the number, you can't un-see it. — Owner, 9-truck HVAC shop · Saint-Laurent, QC
What a Canadian season actually looks like
Most shops in our sample received between 8 and 22 inbound calls per day in peak season. Roughly 38% of those arrived outside business hours. Of those after-hours calls, the median "eventually returned" rate — i.e. the homeowner still booked with you when you finally called back the next morning — was just 24%.
Do the simple math on a shop with 12 calls per day, 38% after-hours, over a 150-day heating season:
- 684 after-hours calls arrive across the season.
- 520 go unreturned in time and are booked by a competitor.
- At
$450fully-loaded loss per call, that is $234,000 in revenue lost per season, every year, from a single shop.
The shops we studied were not aware of this number. When we showed it to them, three different owners asked us to re-run the math because they thought we'd made an error. We hadn't. The loss is invisible because it never appears as a negative on any report — it simply never arrives as a positive.
Why this hides in plain sight
Missed-call loss is the most under-measured cost in the HVAC P&L for three structural reasons:
- It doesn't leave a ticket. There's no invoice, no dispatch record, no accounting entry. The only trace is a voicemail nobody listens to.
- The competitor win is silent. You rarely learn that a homeowner called you first and then called someone else.
- The owner is in the field. The very people who should be measuring this are usually under a furnace when the call drops.
The fix is cheaper than one missed call per week
At $450 per missed after-hours call, a shop only needs to recover one call per week to pay for a 24/7 AI intake layer for the entire year — with the other 519 recovered calls dropping straight to revenue.
That is not a marginal ROI. That is a phone that answers itself paying for the truck that picks up the job. The owners who act on the number stop describing it as a "software cost" within about three weeks. By week four, they describe it as the shift that quietly saved their season.