What missed calls cost a law firm (and when cover pays for itself)

Missed new-client calls a week, multiplied by the share of those callers who would have instructed you, multiplied by your average fee per matter, multiplied by 52. That's the yearly cost in lost fees, before you count goodwill or fee earner time.

You'll see headline figures for missed calls across all 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 covers every kind of small business, not law firms. One lost probate or conveyancing instruction can be worth more than that on its own, so your own figures are the better guide.

Here's the sum with made-up inputs for a small firm. Change each line to match yours.

1. 13 missed calls × 25% = 0.75 lost instructions a week.
2. 20.75 × £1,200 = £900 in lost fees a week.
3. 3£900 × 52 = £46,800 a year.

Even if only one caller in ten would have instructed you, the same sum comes to £18,720 a year. Our missed call calculator does the arithmetic for you.

The example is deliberately simple. It treats every missed caller as lost, when some will ring back, and it ignores repeat work, such as the client whose conveyancing leads to a will. Those two effects pull in opposite directions, so the plain sum is a reasonable place to start.

New enquiries for work people shop around for, and new enquiries from people in a crisis. Existing clients chasing progress cost the least, because they almost always try again.

Referrals are worth protecting. In the Legal Services Consumer Panel's 2026 tracker survey of 3,802 legal services users in England and Wales, 21% chose a provider they or a family member had used before and 18% followed a recommendation from family or friends. Those callers arrive half-won. Missing them wastes the work that earned the recommendation.

Price shoppers are worth answering too. The same survey found 42% shopped around, and of those who compared providers, 57% compared price and 52% compared reputation. A caller who gets through can ask about your fees there and then; one who doesn't is comparing the firms that answered.

Reputation, time and a harder first conversation. None of these show up in the sum above, but they're real.

• Word of mouth. 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.
• Fee earner time. Every round of phone tag with a new enquiry is time a solicitor can't bill.
• A colder start. A caller you ring back hours later has had time to doubt themselves or to speak to someone else, and the first conversation is harder.
• Existing clients. A client who can't get through tends to ring more, not less, and their next call is often a complaint.

From your phone system's call log. Two normal weeks is enough to see the pattern.

1. 1Export two weeks of call history from your phone system or provider's portal.
2. 2Filter for unanswered and abandoned calls, including those that went to voicemail.
3. 3Split them by time of day: office hours, lunch, the first hours after closing and weekends.
4. 4Mark calls from numbers that aren't existing clients or contacts. Those are your likely new enquiries.
5. 5Count how many of those callers left a voicemail and how many you managed to call back.
6. 6Compare the total with the new matters you opened in the same fortnight.

Look especially at lunchtime, the hour after closing and Saturday mornings, when reception is often thin. Our guide to out-of-hours calls for law firms covers what to do with the evening and weekend share.

When the fees it protects are more than it costs. At £99 a month, Ringzel Basic costs £1,188 a year, so at an average fee of £1,200 it pays for itself if it saves one instruction a year.

A receptionist does far more than answer the phone, so this isn't a like-for-like comparison. Our guide to what a law firm receptionist really costs breaks that figure down. The point is narrower: covering the calls your team can't take is cheap compared with the fees a few missed enquiries carry.

If your log shows very few missed calls from new numbers, you may not need any extra cover. A better voicemail greeting and a firm call-back routine could be enough.

When daytime rings still slip through, add overflow cover that picks up after a few unanswered rings, takes the intake and sends you the details, rather than hoping people leave a voicemail.

• Set a no-answer divert, so calls move on after a few rings instead of ringing out.
• Cover lunch, either by staggering breaks or by diverting to an answering service.
• Have a plan for evenings and weekends, even if it's only taking details for a call back first thing.
• Give one person the job of returning overnight and missed calls before 10am.
• Offer website chat for people who'd rather type than ring.
• Check the call log monthly, so you notice if the pattern changes.

For more ways to turn enquiries into instructions, see our guide to how law firms get more clients.