When your phone rings and nobody answers, it costs more than a lost conversation. It costs revenue, reputation, and the kind of trust that takes months to build.
For small businesses, every call is a potential customer, a rebooking, a referral, or a complaint that could have been caught early. Yet most SMBs don’t track how many calls they miss, let alone what those missed calls cost.
Let’s put some numbers to it.
Research from BT and the Federation of Small Businesses consistently shows that the average UK SMB misses between 20% and 40% of inbound calls during working hours. After hours, the number is effectively 100% unless you’re paying for an answering service or running voicemail.
That’s two out of every three people who tried to reach you and simply gave up. They didn’t leave a message. They didn’t email. They called your competitor instead.
The cost depends on your industry and average deal value, but the maths is straightforward. Let’s work through a realistic example for a service-based SMB.
| Variable | Value |
|---|---|
| Missed calls per week | 15 |
| Percentage that were potential customers | 40% |
| New customer opportunities missed per week | 6 |
| Conversion rate (had you answered) | 30% |
| Lost new customers per week | 1.8 |
| Average customer value (first year) | £500 |
| Estimated revenue lost per month | £3,600 |
For a healthcare clinic, dental practice, or trades business, these numbers can be significantly higher. One franchise network we work with estimated that missed calls were costing individual clinics over £2,000 per month in unbooking appointments alone, before accounting for the lifetime value of those patients.
Revenue is the obvious number, but missed calls create a cascade of other problems:
A customer who can’t reach you doesn’t just go elsewhere. They form an opinion. “They never answer the phone” becomes the word-of-mouth story they tell friends, colleagues, and Google reviewers. One negative review mentioning poor availability can influence dozens of future buying decisions.
When someone does leave a voicemail, it creates a callback queue. Your team spends time playing phone tag instead of serving the customers already in front of them. Studies show that the odds of reaching a lead drop by 10x if you wait more than five minutes to call back.
Not every missed call is a new customer. Many are existing clients trying to rebook, extend a service, or ask about something additional. These are the highest-value calls you can receive, and they’re the easiest to lose because the customer assumes you’ll call back. You won’t, because you don’t know they called.
In most industries, a customer who can’t reach you will call the next business on Google within 60 seconds. They’re not loyal to your brand yet. They’re loyal to whoever answers the phone.
Quick test: Call your own business at 6pm on a Tuesday. What happens? Now imagine a customer doing the same thing. That experience is your brand.
Missed calls hit hardest in industries where:
If you recognise your business in that list, the cost of missed calls is likely higher than you think.
Traditionally, businesses had three options:
There’s now a fourth option: AI voice agents that answer your phone 24/7, on your existing phone system, using your business name and your processes.
Unlike a voicemail box, an AI receptionist actually handles the call. It identifies the caller, answers routine questions (opening hours, pricing, availability), books appointments directly into your diary, and routes anything complex to the right person with full context.
Unlike a human receptionist, it never calls in sick, never takes a lunch break, and costs a fraction of a salary.
If your business receives inbound calls and you don’t have someone (or something) answering every single one of them, you’re leaving money on the table. Not a trivial amount. Thousands of pounds per month for most SMBs.
The question isn’t whether you can afford an AI receptionist. It’s whether you can afford not to have one.
Edison AI Receptionist answers your phone 24/7 on your existing system. From £40/month. Setup included.
Book a 30-minute demo