How Much Do Missed Calls Cost a Small Business? (Do the Maths)
Every missed call feels like nothing — a buzz you’ll deal with later. Add them up across a year and they are usually one of the largest invisible costs in a small business. Here is the maths, with honest UK examples.
1. The formula
Missed calls/week × % that were new enquiries × average customer value × 52. That’s it. The only discipline is using honest numbers: count one normal week’s missed calls (your phone system logs them), assume 30–50% were new business, and use lifetime value where repeat custom is normal.
2. A plumber
20 missed calls/week (on the tools all day), 40% new enquiries, £350 average job: 20 × 0.4 × £350 × 52 ≈ £145,000/year of enquiries that rang someone else. Win even a quarter of those and it’s £36k.
3. A hair salon
15 missed calls/week, half wanting to book, £45 average appointment — but a retained client visits 8 times a year: 15 × 0.5 × £360 × 52 ≈ £140,000 of annual-value bookings at risk. No-shows make it worse; missed rebooking calls compound it.
4. A dental practice
Even 5 missed new-patient calls a week matters when a new patient is worth £700+/year in recurring care: 5 × £700 × 52 ≈ £182,000 of annual patient value ringing the practice down the road.
5. A letting agency
10 missed calls/week, 30% applicant or landlord enquiries, average tenancy worth £1,200 in fees and management: 10 × 0.3 × £1,200 × 52 ≈ £187,000 of pipeline. After-hours viewing requests — where most misses happen — are the highest-intent calls of all.
6. Why this keeps happening
Calls cluster exactly when you cannot answer: lunchtime, school run, mid-job, mid-client. Hiring for the peaks means idle staff in the troughs. That mismatch is structural — which is why the fix is structural too: something that answers every call instantly, regardless of when it lands.
What this looks like with Leron
Leron answers the calls you physically cannot — every one, in one ring, day or night — books the job into your diary and sends you the summary. Run YOUR numbers through the formula above; that is the budget conversation.
Frequently asked questions
What percentage of calls do small businesses miss?
Industry studies consistently put it between 25% and 40% during business hours — and close to 100% of out-of-hours calls. The bulk of missed callers do not leave a voicemail; they ring the next business on the list.
Do missed callers really go to a competitor?
Most do. A caller with intent has a list; if you do not answer, the next number gets the job. That is what makes a missed call a transfer of revenue, not a delay of it.
What is the simplest formula for the cost of missed calls?
Missed calls per week × the share that were new business × your average job or customer value × 52. Run it once with honest numbers; the result is usually uncomfortable.