What missed calls cost a private clinic

Missed new-patient calls a week, multiplied by the share who would have booked, multiplied by what a new patient is worth to you, multiplied by 52. That's the yearly cost in lost income, before you count unfilled slots.

You'll see headline figures for missed calls across all small businesses. A BT Business survey of UK small businesses, published on 1 October 2026, put the average yearly cost of missed calls at £1,597 for businesses with 1 to 9 employees. BT sells its own AI receptionist and describes the estimate as indicative, and it isn't specific to clinics. Your own figures will tell you far more.

Here's the sum with made-up inputs for a small clinic. Replace each line with yours.

1. 14 missed calls × 30% = 1.2 lost new patients a week.
2. 21.2 × £240 = £288 in lost income a week.
3. 3£288 × 52 = £14,976 a year.

If only one caller in ten would have booked, the same sum still comes to £4,992 a year. Our missed call calculator does the arithmetic with your own figures.

The sum treats every missed caller as lost, when some will ring back. It also leaves out what a happy patient brings later: repeat visits, a review and the friend they send to you. Those pull in opposite directions, so the plain sum is a fair starting point.

Usually more than one appointment. Work it out as your average appointment price multiplied by the number of appointments a typical new patient books in their first course of treatment.

Use your own records rather than a rule of thumb, because it varies so much between clinics. A physiotherapy clinic might see a new patient several times for one problem. An aesthetics clinic might see them once, then again months later. A podiatry clinic might see them regularly for years. Pull the last 50 new patients from your diary and average what they spent in their first three months.

Mostly unfilled slots. An existing patient who can't get through to cancel or move an appointment either doesn't turn up or tells you too late for anyone else to take the time.

As an example only: if two late cancellations a week reach you too late to refill, at £60 an appointment, that's £120 a week or £6,240 a year. Answering those calls doesn't stop people cancelling, but it gives you the chance to offer the slot to someone else. Our guide to clinic cancellations and no-shows covers reminders, waiting lists and fair cancellation policies.

New patients who want to be seen soon, and existing patients cancelling at short notice. Routine questions from existing patients cost the least, because those callers almost always try again.

Beyond the money, there's reputation. In BT Business's 2026 survey of 2,000 UK adults, 58% said they'd tell friends and family to avoid a business that didn't pick up. For a clinic that grows by word of mouth, that matters.

From your phone system's call log. Two normal weeks show the pattern.

1. 1Export two weeks of call history from your phone system or provider's portal.
2. 2Filter for unanswered calls and calls that went to voicemail.
3. 3Split them by time: during treatment sessions, at lunch, after closing and at weekends.
4. 4Mark calls from numbers that aren't existing patients. Those are your likely new patients.
5. 5Count how many you called back, and how many of those booked.
6. 6Note any cancellations you heard about too late to refill.

In a single-handed clinic, the gaps tend to match your own diary: when you're treating, nobody is answering. Our guide to out-of-hours calls for private clinics covers the evening and weekend share.

When the income it protects is more than it costs. At £99 a month, Ringzel Basic costs £1,188 a year, so with a new patient worth £240 it pays for itself if it saves five new patients a year.

A receptionist does much more than answer the phone, so this isn't like for like. Our guide to what a clinic front desk really costs works that figure out properly. If your log shows very few missed calls from new numbers, you may not need extra cover at all; a clear voicemail and a call-back slot between sessions could be enough.

If there is nobody free to pick up, divert busy and unanswered calls to an answering service or AI receptionist on the number patients already dial, so enquiries are captured while you treat.

• Set a no-answer divert, so calls move on after a few rings while you're treating.
• Block a few minutes between sessions to return calls, and keep to it.
• Let people book online for simple appointment types.
• Keep a short waiting list for patients who'd take an earlier slot.
• Have a plan for evenings and weekends, when many patients ring to book or cancel.
• Check the call log monthly, so you see when the pattern changes.

For bringing more new patients in once the phone is covered, see our guide to private clinic marketing.