Ask a managing partner how much a missed call costs and you'll usually get a shrug. It's one call. Someone will call back, or they'll email, or they'll find another way through. No harm done.
Run the numbers properly and the shrug stops.
The maths is simple
Say your firm bills at an average of £280 an hour and takes on one new matter for every eight enquiry calls. If you're missing even one in ten calls during business hours - a conservative figure for most firms without dedicated reception cover - that's roughly one lost instruction a month, every month, for as long as the gap exists.
Multiply that across a year and you're not looking at a rounding error. You're looking at the equivalent of a part-qualified solicitor's annual billing, gone, with nothing to show for it except a voicemail nobody checked in time.
It's not just the call you miss
The real cost isn't the call itself. It's what the caller does next. A prospective client who can't get through to a law firm rarely tries a second time. They try the next firm on the list. In a market where most firms in a given specialism look identical on paper, the one that answers wins the instruction - not necessarily the one with the better track record.
Existing clients are less forgiving still. A missed call from someone already paying your fees reads as neglect, not bad luck. It's the kind of thing that shows up eighteen months later as a lost renewal, with no obvious cause attached.
Why "we'll get better at answering" doesn't work
Most firms know this. Almost none fix it, because the fix usually means hiring - a receptionist, an answering service, or asking fee-earners to pick up between meetings. All three have the same flaw: they only work when someone is available, and availability is exactly the problem you're trying to solve.
An AI receptionist doesn't need a lunch break or a day off. It answers on the first ring, every time, and asks the questions your intake process actually needs answered - not a generic script, but the specific things your firm needs to know before it can qualify a lead or triage an existing client's query.
The call that used to go to voicemail becomes a booked callback in your fee-earners' diary, with the context already captured. That's not a marginal improvement. For most firms, it's the single highest-leverage change available.