How to Calculate the Real Cost of a Missed HVAC Call

Start with your answer rate, not your gut feeling

Most shop owners assume their team answers "almost everything." Then they pull the call logs. Between jobs on the road, lunch breaks, and after-hours calls that roll to voicemail, home service businesses commonly answer somewhere between 60% and 80% of inbound calls live. That gets worse during storms and cold snaps, which is exactly when call volume spikes.

Pull your phone system's report for the last 90 days and count total inbound calls versus calls answered live. That gap is your missed-call rate, and it is the first number you need.

Multiply by your close rate and average ticket

Not every missed call would have converted, but you cannot assume none of them would have either. Use your existing close rate on live-answered calls as your baseline: if you close 35% of the calls you do answer, it is reasonable to assume a similar share of missed calls were live opportunities, not spam.

Multiply: (missed calls per month) × (close rate) × (average ticket). For a shop taking 400 calls a month with a 25% miss rate, a 35% close rate, and a $450 average ticket, that is 100 missed calls × 35% × $450: over $15,700 a month in jobs that never made it onto the schedule.

Do not forget the emergency premium

Emergency and after-hours calls skew the math further, because they carry higher tickets (overtime rates, same-day dispatch) and lower patience. A homeowner with no heat at 10 PM is calling the next number on Google the moment yours does not pick up.

If you can, tag missed calls by time of day. The after-hours segment alone is often worth more than the daytime miss rate, dollar for dollar, because there is no second chance.

Add the compounding cost: reviews and referrals

A missed call does not just cost you one job. A homeowner who could not reach you during an emergency remembers that the next time a neighbor asks for a recommendation. Your missed-call cost is a floor, not a ceiling.