What a missed call actually costs your business (and how to work out your own number)

A missed call is the only business failure that leaves no trace. Nothing arrives, nothing beeps, nothing goes on a list. The customer who called while you were on a roof, in a meeting or driving simply became somebody else’s customer, and the only evidence is a number you don’t recognize that you’ll mean to call back tomorrow.

That invisibility is the entire problem. In nineteen years of answering other companies’ phones, the most common reaction when a business first sees a month of its own call log isn’t "that’s expensive" — it’s "I had no idea there were that many."

This article is about producing your own number instead of borrowing someone else’s.

Why the industry statistics don’t help you

Search this topic and you’ll find confident percentages: what proportion of callers leave a voicemail, what proportion call a competitor, how much the average business loses a year.

Treat all of them with suspicion, for three reasons. Most trace back to a survey of a specific industry in a specific country and get quoted as universal. Almost none distinguish between a plumber and a law firm, whose economics differ by orders of magnitude. And the ones with the most alarming figures are usually published by companies selling the solution — including, to be fair, companies like ours.

Your own number is both more accurate and easier to get than it looks.

The calculation, in four inputs

You need four things. Three of them you already have; the fourth is the only one requiring research, and there’s a shortcut.

1. How many calls you miss a month. Your phone provider’s call log has this: inbound calls that rang out, went to voicemail, or were disconnected before answer. Most carriers show it in the online account under call history. If yours doesn’t, forwarding your line to an answering service for a month produces it as a side effect.

2. How many of those callers were potential customers. Not all of them. Subtract the sales pitches, wrong numbers and existing customers who’d have called back anyway. Sampling twenty of them is enough to estimate the proportion — for most service businesses it lands between a third and two thirds.

3. Your close rate on inbound enquiries. What proportion of genuine enquiries turn into paying work. Most owners know this within ten points, and if you don’t, it’s worth finding out for reasons well beyond this article.

4. Your average job or client value. For a one-off job, the job value. For anything recurring — a clinic, a firm, a maintenance contract — the lifetime value, not the first invoice. This is where most calculations go wrong: valuing a new dental patient at the price of one cleaning understates it by a factor of ten or more.

The arithmetic:

missed calls × % genuine enquiries × close rate × average value = monthly cost

Worked example. A plumbing company misses 40 calls a month. Half are genuine enquiries. It closes 40% of enquiries. Its average job is $450.

40 × 0.5 × 0.4 × 450 = $3,600 a month

The same arithmetic for a dental practice missing 30 calls with a new-patient lifetime value of $1,200 produces a very different figure, which is exactly why a generic industry statistic is useless to you.

The three things this calculation still underestimates

The callback tax. Every missed call you do return costs you a call to establish what they wanted, another to actually deal with it, and the gap in between during which they may have booked elsewhere. Two or three calls to replace one.

The reputation you never hear about. A caller who reaches voicemail forms an impression of a business too small to answer its phone. They don’t tell you. They occasionally tell other people.

The concentration. Missed calls are not evenly distributed. They cluster exactly when you’re busiest — the storm week, the flu season, the day three jobs overran. Which means the calls you miss are disproportionately the ones arriving during your peak demand, when they’re worth the most.

Where the calls actually go missing

Four windows, in rough order of size for most small businesses.

While you’re working. The largest by far. Hands full, on a ladder, with a client, driving.

After closing. Evenings and weekends, when your customers have finally finished their own working day. Small volume, high intent — the after-hours caller has usually already decided to act.

During peaks. Two calls arriving at once, and one of them waits.

Holidays and absences. Whole days where the phone is nobody’s job because the person whose job it was is away.

Knowing which of the four is yours changes the solution. If it’s the first, you need overflow cover. If it’s the second, after-hours cover is cheaper and does the job. If it’s the fourth, the problem is that reception is a single point of failure.

What to do with the number once you have it

Compare it against the cost of the options, and the comparison is usually short.

Do nothing. Free, and now you know what it costs.

Answer more of them yourself. Free in cash, expensive in interrupted work. Worth calculating what an hour of your time is actually worth before choosing this.

Hire. A receptionist covers business hours minus holidays and sick days, and does other work besides. Fixed cost regardless of call volume.

Overflow or after-hours cover. Your phone rings first; unanswered calls forward. You pay only for the calls that would otherwise have been lost, which makes the arithmetic unusually direct: if the monthly cost is below the monthly loss, it pays for itself.

For most of the businesses we work with, one recovered job a month covers the service. Whether that’s true for you depends entirely on the four numbers above — which is why we’d rather you calculate them than take our word for it.

Do the cheap version first

If the four inputs feel like work, there’s a shortcut that costs a month and produces better data than any estimate.

Forward your line on no-answer — your phone rings first, and only rolls over if nobody picks up — and read the log after four weeks. You’ll have the real count, the real mix, and the real hours. Then run the arithmetic on facts instead of guesses.

Either you’re losing more than you thought, or you’re not. Both answers are worth having, and right now you’re guessing.

How overflow cover works · pricing, per answered call · a free first month to run the experiment