Phone availability feels like a cost: you have to pay someone to answer. But the calculation works the other way around. Not being reachable costs money — every incoming call is an opportunity, and every missed call is an opportunity that goes to a competitor.
The core formula
The value of a missed call consists of three factors:
value per missed call = chance of a client × value of that client
Not every missed call is a new client — some callers are existing clients with a simple question, or a wrong number. But at a practice or office, a large share of inbound calls is a new or existing client who wants to arrange something.
An example (fill in your own numbers)
Take a practice with an average of 30 calls per day, of which on average 25% are missed — that is more than 7 missed calls per day, or around 150 per month.
Suppose, very conservatively, that you estimate 1 in 10 missed calls was a new client or an extra appointment. That is 15 missed new clients per month. If one new client is worth an average of €100 in revenue per year, that is €1,500 per year in missed revenue.
Now fill in your own figures: the amounts and ratios differ enormously per sector. At a law firm or notary, one missed estate or personal-injury case can easily be worth thousands of euros — see the AI receptionist for law firms.
Missed calls cost more than revenue
Beyond direct revenue, there is silent damage:
- Trust. A client who is not helped remembers that — and tells others.
- Urgency. In an emergency, a missed call is not a missed opportunity but a missed responsibility.
- Reputation. A practice that is unreachable after closing feels outdated.
Comparing the safety nets
A voicemail captures the call, but does not turn it into an appointment. A callback arrangement helps, but only if someone actually calls back. An AI receptionist turns a missed call into an answered call: the caller gets an answer, an appointment or a callback arrangement — 24/7.
That makes the trade-off simple: what does it cost you to miss calls, and what does it cost not to miss them? The answer to the second question is in what does an AI receptionist cost.