The only number that settles it: cost per booking
Arguments about whether software is worth it usually stall on the monthly price, which is the least informative number available. The figure that decides it is what each booking you would otherwise have lost ends up costing — and unlike most marketing arithmetic, you can work it out from things you already know.
The calculation
Take your monthly cost. Divide it by the number of bookings that came in through calls you would not have answered — evenings, weekends, the hours you were with customers. That is your cost per recovered booking. Compare it against what a booking is worth to you, and the decision makes itself in one line.
Why it usually looks decisive
For most appointment businesses, one recovered booking a month covers the subscription outright, because the average job is worth more than the plan. A salon at seventy pounds a head, a clinic at ninety, a trade at a couple of hundred — in each case the first recovered booking clears the cost and everything after it is margin. The arithmetic is unusual in being this blunt.
Count the repeat value too, carefully
A new customer in most of these businesses is not worth one appointment; they are worth however many times they come back. That materially changes the figure — but it is also where cost-per-booking arguments become dishonest, so use your real repeat rate rather than the optimistic one, and be willing to reach the answer that says no.
When the number says no
A handful of calls a month means very little to recover, whatever the value of each one.
If a booking is worth fifteen pounds and never repeats, the arithmetic is much tighter and may not clear.
Businesses whose phone is mostly support or suppliers are solving a different problem than this one.
How to get the real figure
Run it for a week and look at what actually came in outside your open hours, then annualise. A week of your own calls beats any industry benchmark, and it is the difference between a decision and a guess.
Frequently asked
Divide your monthly cost by the bookings that came from calls you would otherwise have missed — evenings, weekends, and the hours you were busy. Compare that against what a booking is worth to you.
For most appointment businesses, one a month. The average job is worth more than the plan, so the first recovered booking clears the cost.
Yes, but with your real repeat rate rather than an optimistic one. It changes the figure a lot, which is exactly why it is the number people inflate.
Very low call volume, low-value jobs that never repeat, or a phone that is mostly suppliers and support rather than potential bookings.
Run it for a week and count what came in outside your open hours. Your own week beats any benchmark.