What a missed call costs.

Written by the Incognito Labs engineering team 16 September 2026 7 min read

Search this question and you will be given confident figures. BT Business has been widely cited putting the average value of a missed business call at around £1,200. Other published work puts the annual cost to a typical UK small business at roughly £5,500. Research from call-handling firms has suggested UK SMEs miss somewhere around a quarter of inbound calls, with the rate materially higher for first-time enquiries from people who have never dealt with you before.

Treat all of these as an order of magnitude, not a measurement. Much of this research is published by companies selling call answering, the definitions of “missed” differ, and an average that mixes a plumber with a law firm is not describing either of them. A £1,200 average is meaningless if your average job is £90 — and badly understated if you install kitchens.

The reason missed calls cost more than they appear to is that the loss is invisible on both sides. The caller does not complain. You never learn what they wanted. Nothing appears in any system, because the defining feature of the event is that no record was created.

What the research consistently agrees on is caller behaviour: the large majority of people who reach voicemail do not leave a message, and a substantial share ring a competitor within the hour. Both findings match what any business owner recognises from their own behaviour as a customer. If you needed a locksmith, you would not leave a voicemail and wait.

So the cost is not one job. It is one job, plus every repeat job that customer would have brought, plus the referral they would have made — landing instead with whoever picked up. That is why the honest figure is usually larger than a single average sale, and why it compounds.

Image placeholder Suggested: a simple timeline of a missed enquiry — call at 18:40, voicemail ignored, competitor called at 18:47, job booked elsewhere by 19:05.

Missed calls are not spread evenly, which is useful: it means the fix does not have to cover every hour of the week.

They cluster in three windows. The middle of the day, when your team is on site or at lunch. After five, when your customers have finished their own work and finally have time to sort out theirs. And Saturday mornings, which for a domestic service business is prime buying time and for most suppliers is a closed office.

The pattern is unhelpful in an obvious way: the hours when motivated buyers are most likely to ring are exactly the hours when a small team is least able to answer. That is not a staffing failure. It is a structural mismatch, and it is why throwing willpower at it does not work.

In ascending order of cost and effectiveness. Most businesses should start at the top, not the bottom.

1. Divert, and mean it. A mobile divert and an honest voicemail that tells people exactly when you will call back, plus a text sent immediately afterwards, is free and beats what most businesses do now. The text is the important part: it turns a dead end into a thread the caller can reply to. If you do nothing else in this article, do this on Monday.

2. An answering service. A real person takes a message to a script. It works, and it has a per-call cost that grows with success. The limitation is that they cannot see your diary, so they take a message rather than book the job — and the caller still waits.

3. Capture and book automatically. The enquiry is answered immediately, whatever the hour, with something that can actually read your availability and hold a slot. Nobody rings you back tomorrow because the job is already in the diary. This is the one that removes the mismatch rather than staffing around it, and it is the fourth step in the sequence we set out in what to automate first — it needs your availability and your records to be in order before it can be any good.

An automatic reply that says “thanks, we have received your enquiry and will be in touch” is worse than silence. It spends the caller’s goodwill without moving the job forward, and it tells them they are dealing with a business that has bought software instead of answering.

If an enquiry is going to be handled automatically, it should do four things in the order a competent person would:

• Capture. Who is this, what do they want, how do we reach them. Written to a record, not an inbox.
• Qualify, lightly. Two or three questions that decide whether this is a job you do at all, and roughly what it is. Not an interrogation at nine at night.
• Book, or hold. Offer real slots from the real diary and take one. A slot that turns out not to exist is worse than no slot.
• Escalate what it cannot handle. Anything unusual goes to a named human with the context attached, and the caller is told a person will come back to them. Silent failure is the one outcome worse than a missed call.

You can see this shape working in the automations demo on our services section — out-of-hours calls answered, bookings taken, and only the exceptions reaching a person.

Three numbers, and you can get all of them this month without buying anything.

• Your miss rate. Most phone systems and mobile carriers will show missed calls by hour. Count a fortnight. Separate the ones outside working hours.
• Your first-time share. Of those missed numbers, how many are not already in your contacts? Those are the expensive ones — an existing customer will usually try again, a stranger will not.
• Your average job value. You already know this one.

Multiply the second by the third and you have a monthly figure that is actually about your business. It will not match anything published, and that is the point. Then compare it with what fixing it costs, which is the same arithmetic we describe in custom software or off-the-shelf.

If the number is small, do fix number one and stop. If it is a job a week, you have found something worth building.