What a missed call really costs you
A call you don't answer isn't "zero": it's a customer going to a competitor. The problem is that this cost never shows up in your books, which is why it's so easy to ignore. Here's how to calculate it in five minutes.
The missed-call formula
Multiply three numbers: unanswered calls per month × the chance they were a new customer × the average value of that customer. The result is usually surprising.
Example: 40 missed calls a month, 30% would be customers, each worth €120 → that's €1,440 a month walking out unnoticed.
| Business | Missed calls/month | % that would be customers | Average customer value | Monthly cost |
|---|---|---|---|---|
| Dental clinic | 40 | 30% | €120 | €1,440 |
| Physiotherapy practice | 25 | 35% | €200 | €1,750 |
| Restaurant (bookings) | 60 | 50% | €45 | €1,350 |
| Estate agency | 15 | 20% | €1,500 | €4,500 |
Where they're actually lost
They're not lost mid-morning when everyone's available. They're lost at lunchtime, after hours, on weekends and at peak times, when your team is already serving someone.
Those are exactly the hours a human can't be on the phone, and an AI can.
What you can do this week
Turn on an automatic WhatsApp reply outside hours, even a basic one. Measure how many calls come in while you're closed. And if the number from the formula stings, consider a receptionist that always answers.
Frequently asked questions
How do I know how many calls I actually miss?
Most switchboards and business mobiles keep a missed-call log. If yours doesn't, the honest approximation is to count them by hand for two weeks and multiply: the number will be imperfect, but good enough to decide on, which is the point.
Can I really just guess the new-customer percentage?
No, which is why it is worth looking at where your current customers came from. With no data, use a conservative figure and see whether the result still stings: if it pays off at 20%, the decision doesn't hinge on refining the number.
What if my team calls back later?
It helps, but it doesn't close the gap. Some of the people who get no immediate answer have already rung the next name on the list; in sectors where customers shop around (property, fuel, garages) that is most of them.
Does this calculation work for WhatsApp?
It works just the same, and usually produces bigger numbers, because an unanswered message leaves no "missed call" trace and is even easier to ignore.
Want to put your own number on it?
In a 15-minute call we run the maths with your real business data.
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