What a missed call revenue calculator works out
A missed call revenue calculator is a simple sum that estimates the money a business loses when calls go unanswered. It multiplies missed calls per week by the share that are new enquiries, the share of those you would normally win, the value of a typical job, and the weeks you work in a year.
Written out, it looks like this:
missed calls a week × share that are new work × share you would win × value of a job × weeks worked a year
Nothing in that line comes from a survey. Every number is yours, so a dog groomer and a roofer can miss the same number of calls and lose very different amounts.
The $50k worked example, line by line
The $50,000 worked example is one made-up but ordinary trade business, not a claim about businesses in general. A sole trader misses eight calls a week, half are new enquiries, half of those would have booked, a typical job is worth $500, and the business works 50 weeks a year.
| Step | Example input | Running result |
|---|---|---|
| Calls missed in a week | 8 | 8 missed calls |
| Share that are new work | Half | 4 new enquiries |
| Share you would have won | Half | 2 jobs |
| Value of a typical job | $500 | $1,000 a week |
| Weeks worked in a year | 50 | $50,000 a year |
Eight missed calls a week is fewer than two a working day. For anyone who spends the day up a ladder or under a sink, that is not a wild number. Multiplying by 50 weeks is what makes it uncomfortable.
Change one number and watch it move
The example only matters if you can bend it to fit you. Here are three more made-up businesses run through the same sum.
| Example business | Missed a week | New work | Would win | Job value | A year (50 weeks) |
|---|---|---|---|---|---|
| Mobile dog groomer | 6 | 2 of them | Half | $80 | $4,000 |
| Electrician | 5 | 2 of them | Half | $350 | $17,500 |
| Roofer | 4 | 2 of them | One in four | $3,000 | $75,000 |
The roofer misses the fewest calls and loses the most, because one job is worth so much. The groomer's figure looks small until you remember that a happy dog owner comes back every six weeks, which this sum does not count.
Getting honest numbers from your own call log
The calculator is only as good as what you feed it. Each input has a place you can look it up, and a common way people get it wrong.
Missed calls a week
Open the call history on the phone your customers ring. Pick a normal fortnight, not the week you were away. Count every incoming call you did not answer, then halve it to get a weekly figure.
One blind spot: a caller who rings while you are already on the phone may not show up as missed at all, depending on your provider. If you are on calls a lot, your real number is a little higher than the log says.
The share that are new work
Go down the same list and mark each missed call as known or unknown. Known numbers are regulars, suppliers and family, and most of them will ring back. Unknown numbers are your first guess at new enquiries.
To tighten the guess, ring the unknown numbers back for one week and note what each call was about. After twenty or so you will know whether half is right for you, or a third, or most of them.
The share you would have won
Use your record when you do answer. If ten new callers usually turn into five booked jobs, your share is half. Be careful not to use your best month. Price shoppers and people outside your area are in the mix, and they count as calls you would not have won.
What a job is worth
Add up the last 20 invoices for first-time customers and divide by 20. Use that, not your biggest job. If your work is repeat by nature, such as a clinic, a salon or a maintenance contract, run the sum twice: once with the first visit and once with what a customer spends in a year. The gap between the two answers is often the real story.
Weeks worked
Take 52 and subtract your holidays and the weeks the phone goes quiet. Fifty is a fair default for most small businesses.
What pushes the figure up or down
Two corrections keep you honest.
Callbacks recover some of it. If you ring missed callers back quickly, a few will still be looking. Track it for a fortnight: of the unknown numbers you ring back, how many end in a booking? Take those away from your lost jobs. A caller with a problem today rarely waits, for the reasons in the cost of missed calls for a small business.
Repeat work adds to it. The sum counts one job per lost customer. If your customers come back, or send their neighbours, the true number is higher.
A sensible way to report the answer to yourself is as a range. Run a cautious version with low inputs and a likely version with your best guesses. If even the cautious figure is several times what it would cost to have every call answered, you have your decision.
Try the online missed call revenue calculator
If you would rather not do it on paper, the missed call calculator on our site runs the same kind of sum from numbers you type in: calls a week, the share you miss, the share of callers who become customers, what a job is worth and how long a typical call lasts.
It then shows the revenue those calls were worth each month, the minutes it would take to answer them, and the smallest plan whose included minutes cover that. It uses only your inputs, with no industry average inside it.
Putting the figure to work
A number on its own changes nothing. Compare it with the cost of the fix.
Take the price of whatever would answer those calls and divide it by the value of one job. That tells you how many recovered jobs pay for it. With Prepaid AI, a plan runs 30 days and starts at US$29 for 100 minutes, with US$79 for 350 minutes above it. For many trades, one job that would otherwise have gone to a competitor covers the plan. The full list is on the pricing page, and what AI phone plans cost sets them beside the other options. For the path from a late call to a diary entry, see turning after-hours calls into booked jobs.
Then look at when your missed calls happen. If they bunch up after five, start with after-hours cover. If they come while you are working, read nights, weekends and mid-job, and why answering services fall short for trades compares the ways to fill the gap.
Test your figure for free
You can check the sum against real calls before spending anything. Prepaid AI has a 7-day free trial with no card. Paste in your website, talk to your AI in the browser, and hear how it would have handled the calls on your missed list. When you are ready for a local number, pick a plan on the pricing page.
FAQ
How do I calculate revenue lost from missed calls?
Multiply your missed calls a week by the share that are new enquiries, the share of those you normally win, and the value of a typical job. Multiply the weekly result by the weeks you work in a year.
Is $50,000 a year a typical loss from missed calls?
No, it is a worked example with its inputs shown: eight missed calls a week, half of them new, half of those won, and $500 a job. Your own figure could be far lower or far higher.
How many missed calls are actually new customers?
It depends on your business, so count rather than guess. Unknown numbers in your call history are a fair first estimate, and ringing them back for a week will tell you how close it is.
Does calling people back recover the lost revenue?
Some of it. Count how many callbacks end in a booking over a fortnight and subtract those from your lost jobs.
Does the online calculator use industry averages?
No. It works only from the numbers you enter about your own business, plus our own plan minutes and prices.
