The cost of missed calls: how to work out what you are losing

A missed call costs whatever that caller would have spent with you, multiplied by the chance they were a new customer and the chance they never tried again. For most service businesses that adds up to somewhere between a few hundred and several thousand in lost revenue every month. The formula below lets you calculate your own figure in about ten minutes, using numbers from your own phone log.

How many calls do businesses actually miss?

The best current evidence comes from call-tracking companies, which can see millions of real calls rather than relying on surveys. Invoca's 2026 benchmark report analysed more than 70 million calls across ten industries and found that 56% of inbound calls were answered by a person. Of those answered calls, 38% were genuine sales enquiries, and 42% of those enquiries turned into a sale or booking during the call itself.

Chart

What happens to 100 inbound business calls

• Calls received100
• Answered by a person56

  The other 44 calls were missed.

• Genuine enquiries among the answered calls21
• Enquiries converted during the call9

Show the data as a table

Stage	Calls out of 100
Calls received	100
Answered by a person	56
Missed	44
Genuine enquiries among answered calls	21.3
Converted during the call	8.9

Other studies point the same way, although with smaller samples:

• A 2016 study by 411 Locals monitored 85 small businesses for 30 days and found that only 37.8% of calls were answered by a person. A further 37.8% went to voicemail and 24.3% received no response at all.
• BT Business reported in 2026 that 67% of small and medium-sized businesses in the UK miss at least one call a day that could cost them work.

The pattern is consistent across studies and sectors: a large share of calls reach nobody, and small teams who are busy with customers miss the most.

Why so many missed-call statistics cannot be trusted

Search for this topic and you will find the same numbers repeated on hundreds of pages: 62% of calls missed, 85% of callers never calling back, and losses of $126,000 a year. A 2026 review by JustCall traced these figures and found that the 62% claim comes from the small 2016 study above, while the "85% never call back" and "$126,000" figures have no identifiable original source.

That matters because a business case built on a borrowed number is easy to dismiss. The approach below uses your own call data instead, so the result reflects your business and holds up when you share it with a partner, an accountant or an investor.

A formula for your own figure

Monthly cost of missed calls = missed calls per month × share that are new enquiries × share who do not try again × your conversion rate × average value of a new customer

Each input can be measured or estimated sensibly:

Three worked examples

The examples below use illustrative figures for three types of business. Replace each number with your own and the arithmetic works the same way in any currency.

Two things stand out. First, the plumbing company misses the highest share of calls because the people who answer the phone are also the people doing the work. Second, the salon's figure looks modest until you account for repeat visits: at one booking every six weeks, each lost client is worth around A$1,000 a year, and the annual loss rises accordingly.

The calls you miss are not random

Missed calls cluster at predictable times: early mornings, lunchtimes, evenings and weekends, and whenever the team is busy with customers. These are often the calls with the most intent, because people ring outside office hours when they have a problem that cannot wait.

Two further findings affect how you respond:

• People ignore unknown numbers. Hiya's 2026 State of the Call report found that 86% of calls from unknown numbers go unanswered. If you call back from a number the customer does not recognise, a short text message first ("Sorry we missed your call, this is the clinic, we will ring you in five minutes") greatly improves the chance of getting through.
• Speed decides the outcome. In a 2025 study of 1,333 US law firms, the median response to an online enquiry took 13 minutes, and 26% of firms never responded at all. Customers who do not hear back quickly tend to move on to the next business on the list.

What you can do this week at no cost

1. Pull your call log. Count missed calls for the last 30 days and note when they happened. This single number is the most useful input in the formula.
2. Rewrite your voicemail greeting. Say when you will call back, and offer a faster route: a booking link, a text number or a website form.
3. Turn on missed-call text-back if your phone provider offers it. An automatic text within a minute keeps many callers from ringing the next business.
4. Set a callback rule. Every missed call from a new number receives a text and a call within 15 minutes during opening hours.
5. Publish clear hours and a booking link on your website and Google Business Profile, so people who cannot reach you have another way to act.

When an AI receptionist is worth it

Once you know your monthly loss, the decision becomes straightforward arithmetic. If you are losing CA$3,000 a month in missed jobs, a service that answers every call for a fraction of that pays for itself quickly. If your loss is small, the free steps above are probably enough.

An AI receptionist answers every call, day or night, takes the caller's details, answers common questions, books appointments directly into your calendar and passes urgent calls to a person. For a fuller comparison with human answering services and in-house staff, read our guide to AI receptionists, answering services and in-house reception.

What we would do

For a typical small service business, we would start by measuring: one month of call logs and the formula above. If the loss is significant, we would set up missed-call text-back immediately, then add an AI receptionist to cover evenings, weekends and busy periods first, with calls passed to the team whenever a person is needed. That sequence recovers the most revenue for the least disruption, and it gives you real before-and-after figures to judge the result.

If phone calls are only one part of the admin load, our guide to choosing which business tasks to automate first sets out a simple way to prioritise the rest.