What missed calls cost you: how to calculate the money you're losing

The phone rings while you're with a customer. Or during your lunch break. Or at 6:10pm, when you've already closed. Nobody answers, and the person on the other end rings the next business on their list. You never find out you lost an order, because it doesn't show up anywhere: not in the till, not in your invoices, not in your CRM.

Missed calls are one of the most expensive losses in a small business, precisely because they're invisible. In this article I'll show you how to make them visible: where to get the data, which formula to use, how to read the result and what you can actually do to win back some of that money.

Why missed calls don't show up in your accounts

A lost sale leaves no trace. If a customer walks into your shop and leaves without buying, at least you saw them. If they ring and you don't answer, you don't know who it was or what they wanted. That's why many business owners underestimate the problem: "We miss a few calls, like everyone does."

The right question isn't "are we missing calls?" but "how much money do the calls we miss represent?". Only once you've put a figure on paper can you decide whether it's worth doing something and how much it's worth investing.

Step 1: find out how many calls you actually miss

Don't go on gut feeling. You need at least two weeks of data, ideally a month, to catch both busy days and quiet ones. Here's where to get it:

• Your phone system or operator. Most phone systems and business plans keep a call history with a "missed" status. Export it.
• The business mobile. If the business runs on a single mobile number, the call log shows your missed calls. Note them down daily in a simple spreadsheet.
• A manual tally. If you have no source at all, get someone to log every missed call for two weeks: the time, the day and whether the person called back.

Split the calls into three groups: those missed during opening hours (you're busy), those outside opening hours, and those from numbers that rang several times. The last group is a clear sign the person really wanted something from you.

Leave out obviously irrelevant calls: suppliers, marketing numbers, calls lasting a few seconds. You want a cautious figure, not an inflated one.

Step 2: what a call is worth

Not every call is a sale. Some people ring for information, others to complain, others just to compare prices. You need two figures:

1. Your call conversion rate. Of the calls you answer, how many turn into an order, a booking or an accepted quote? If you don't know, log the outcome of every answered call for a week.
2. Your average order value. Take it from your invoices or till: total sales for a month divided by the number of orders.

If you have repeat customers, you can go a step further and use a customer's value over a year, not just their first order. For a first calculation, though, stick with the value of a single order. It's more cautious and easier to defend.

Step 3: the lost-money formula

The formula is simple:

Money lost per month = relevant missed calls per day × conversion rate × average order value × working days per month

There's one more important detail: some of the people who can't get hold of you ring back later. If your history tells you that, say, one in four calls again, subtract that share. If you don't know, use a cautious estimate and write it down clearly next to the calculation.

A worked example (hypothetical figures)

The figures below are made up, just so you can see how it works. Replace them with your own data.

Let's take an imaginary business: a small car repair garage, with one person who answers the phone and also works on reception.

The calculation: 6 calls × 30% = 1.8 jobs lost per day. 1.8 × 600 lei = 1,080 lei per day. 1,080 lei × 22 days = 23,760 lei per month in sales that never happened.

Bear in mind this is lost turnover, not profit. If your margin is, say, 40%, the lost profit is roughly 9,500 lei a month. Both figures matter: the first shows how big the problem is, the second shows how much you can sensibly invest to solve it.

How to read the result

Once you have the figure, compare it with the cost of a solution. There are usually three options:

• Hire another person for the phones. It solves the problem during opening hours, but not in the evenings, at weekends or when that person is on holiday. And the salary is fixed, however many calls come in.
• Forward the calls. To a colleague or your personal phone. It works for a while, until you're busy too.
• Have an AI voice agent take the calls. It answers at any time, can talk to several customers at once, takes orders or bookings and sends you a summary of every conversation.

The common-sense rule: if the profit you lose each month is greater than the monthly cost of the solution, it's worth doing something. If it's much greater, it's worth doing something quickly.

What an AI voice agent can actually do

An AI voice agent is an assistant that answers the phone in a natural voice, understands what the customer wants and sees the conversation through. At Neurotech, our agents run on Claude, the model developed by Anthropic, with voice and telephony provided through ElevenLabs and Twilio. In practice, an agent can:

• answer frequently asked questions: opening hours, prices, address, availability;
• take an order or booking and write it straight into your system;
• transfer the call to a person when the conversation calls for it;
• send the customer a confirmation by SMS or WhatsApp;
• send you a summary of every call, so you know what was said.

A real example: a chain of patisseries in Sibiu uses an AI voice agent together with a custom-built ERP. The agent recovers around 20 calls a day that used to be lost and that meant missed orders.

Common mistakes when doing the sums

• Counting every call as a sale. Not every call is a customer. Apply the conversion rate, or the figure comes out exaggerated and nobody will take it seriously.
• Forgetting the people who call back. Some customers ring again. Take them out of the calculation.
• Confusing turnover with profit. When you decide how much to invest, look at profit.
• Measuring in an unusual week. A week with bank holidays or a promotion skews your average. Measure at least two ordinary weeks.
• Ignoring out-of-hours calls. Many customers ring in the evening, after work. If you don't count them, you miss exactly the part that's easiest to recover.

Quick checklist

1. Export your call history for the last 2–4 weeks.
2. Remove irrelevant calls.
3. Work out the daily average of relevant missed calls.
4. Estimate how many customers call back on their own.
5. Find the conversion rate of answered calls.
6. Work out your average order value.
7. Apply the formula and note lost turnover and lost profit separately.
8. Compare the result with the cost of a solution.

Beyond the phone

Missed calls are often just the symptom. Customers ring because they can't find the information anywhere else: your opening hours aren't up to date on the website, they can't book online, they get no reply on WhatsApp. When you do the sums, also note the main reason people call. If most of them ask the same thing, sometimes a simple automation or an automatic WhatsApp reply cuts call volume before you need anything else.

Next step

If you've done the sums and the figure has given you pause, we can look at it together. In a free 30-minute call we'll tell you honestly whether a voice agent makes sense for your call volume or whether a simpler solution will do.