//Blog post
What a missed call costs a service business
A missed call costs a service business the average job value multiplied by the share of callers who would have booked. For most trades the caller does not leave a voicemail. They ring the next number on the list, and whoever answers first usually wins the job.
You do not need an industry statistic to know your own number. You need four figures from your own books, and about ten minutes.
The formula
Work it out per month:
Missed calls × booking rate × average job value = revenue that rang and went elsewhere
- Missed calls. Pull the call log from your phone provider and count calls that went unanswered or to voicemail, including after-hours and weekends. Do not estimate. The real count is almost always higher than the felt one.
- Booking rate. Of the calls you do answer, what share turn into a booked job? Use that, not an optimistic guess.
- Average job value. Revenue per job, not per year. If your jobs range from a small repair to a full install, use the middle, and run the maths again with a low and a high figure.
Multiply the three. That is the monthly figure. Multiply by twelve if you want the number that tends to change minds.
Why the real figure is usually bigger
The formula counts only the call itself. Three things sit on top of it.
Repeat and referral value. A first job often becomes a maintenance contract or a recommendation. A missed first call loses the whole chain, not just one invoice.
Emergency calls. A burst pipe or a dead heater does not wait until Monday. Emergency callers are the most likely to hire the first person who picks up, and the least likely to leave a message.
Peak-hour pile-ups. Calls cluster. When two come in while you are on a job, the second is missed even if you answer 90% of the day. A daily average hides the peaks.
Where the missed calls come from
Count them by cause before you fix anything, because each cause has a different fix:
- You are on a job. The most common one, and the hardest to remove by working harder.
- After hours. Evenings and weekends, which is when many homeowners actually have time to ring.
- Overflow. A second call arrives while the first is still going.
- Unknown numbers screened out. New customers, by definition, are numbers you do not recognise.
Notice that none of these is a staffing failure. They are structural. A person cannot be on a roof and on the phone.
What actually stops it
There are three honest options, in rising order of cost and capability.
- Forward to a mobile and answer faster. Free and worth doing first, but it does nothing for the job you are mid-way through.
- A human answering service. Takes a message. A message is a promise to call back, and the caller has often moved on by then.
- An AI voice agent. Answers every line at once, at any hour, qualifies the caller, books into your live calendar and sends you the summary. The comparison with an answering service covers when each one fits.
The right choice depends on your figure. If the monthly number from the formula is small, forwarding calls may be enough. If it is large, the cost of doing nothing is already higher than the cost of fixing it.
A simple way to test it first
Do not commit on a hunch. Run the formula for the last three months, then trial a voice agent on one line, such as after-hours only. That isolates the risk and gives you real numbers rather than a vendor's promises.
Check whether callers ended with a confirmed appointment, listen to ten actual recordings, and compare the booked-job count against the same weeks before.
What to do this week
- Export your call log for the last 90 days and count the unanswered calls.
- Work out your booking rate on answered calls and your average job value.
- Run the formula with a low and a high job value.
- Decide whether the result justifies a trial.
If you want help building the number or setting up a trial, our AI voice agents service starts with exactly this audit. You can also see how a booking workflow is built step by step before you commit to anything.