Missed-call revenue calculator
Put in the calls you miss in a typical week, the rate at which you close people you actually speak to, and your average ticket. It returns the booked work and the gross profit walking out the door every month. No email, no gate, and the arithmetic is shown below so you can check it.
Booked work walking away, per month
This is arithmetic on the numbers you entered, not a forecast. It assumes every missed call was a real prospect who would have closed at your normal rate — which is generous, so take a haircut. Weeks per month: 4.3. Nothing you type here is sent anywhere.
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How the math works
Four steps, and you can do them on a napkin:
- Calls missed per month = calls missed per week × 4.3
- Jobs lost per month = calls missed per month × close rate
- Booked work lost = jobs lost × average ticket
- Gross profit lost = booked work lost × gross margin
The gross-profit line is the one to act on. Revenue tells you how big the hole looks; gross profit tells you what plugging it is actually worth, and therefore what you can sensibly spend to plug it.
Where to get the inputs
- Missed calls. Almost every business phone system reports this. Look for “missed,” “abandoned” or “after-hours” over the last four weeks, then divide by four. If you are running the business off a personal cell, your carrier’s call log will show it — count the inbound calls you never returned.
- Close rate. Not your overall lead-to-job rate. The rate at which people you actually spoke to end up booking. It is usually higher than owners guess.
- Average ticket. Total revenue divided by jobs, last twelve months.
- Gross margin. Revenue less direct labour and materials, as a percentage. If you do not track it, 35–45% is a common band in the trades — but use yours if you have it.
Straight talk: how this number lies
It overstates. Not every missed call is a buyer. Some are suppliers, some are spam, some are price shoppers who were never going to book. If you want a conservative figure, cut it in half and act on that.
It also understates one thing. It counts the first job only. It does not count the repeat work, the referral, or the review that customer would have left.
And it says nothing about whether you can absorb the work. If you are booked eight weeks out, answering more calls does not create capacity — it creates a longer queue of people you disappoint. Fix the schedule before you fix the phone.
What to do with the number
If the monthly gross-profit figure is a few hundred dollars, buy missed-call text-back and stop reading. That is a few hundred dollars once, and it will recover a meaningful share of the after-hours bucket.
If it runs into the thousands, the honest next step is to find out which bucket the calls are leaking from — after hours, second-call-while-on-the-first, or on site — because the fix is different for each. That diagnosis is most of what the first hour of the audit does.
Either way, the sequence is the same: get the number, find the bucket, buy the cheapest thing that closes it. Not the other way around.
Bring the number and your call log. We will tell you which bucket the calls are leaking from and the cheapest fix that actually closes it — whether or not that fix is us.
Book Your AI Opportunity Audit — $1,000, credited toward your build