Free tool
What do missed calls cost your business?
Vendors selling call answering quote the same round percentage for missed calls, almost always without a source. You do not need it — your own phone system has the real number. Put your figures in below and the arithmetic is done in your browser. The result is the most a missed call text back or AI receptionist could recover; if it comes out small, that is a useful result too.
Everything above is calculated in your browser. Your numbers are never sent to us or stored — we only count, anonymously, that the calculator was used — and there is no email gate.
Where to get each number
| Input | Source | Stay conservative by |
|---|---|---|
| Inbound calls, and how many went unanswered | Phone system or call-tracking export, one full month | Counting only true misses, not short holds |
| Share that were real opportunities | Listen to a sample of the recordings | Taking the lower end of what you hear |
| Appointment-set rate | Your CRM | Using the trailing three months, not your best month |
| Show rate, close rate, profit per job | Your CRM, calendar or job records | Profit on the first job only — ignore repeat work |
Run it separately for business hours and after hours — the two usually have very different miss rates, and averaging them hides whichever one is actually broken.
Frequently asked questions
How do you calculate the ROI of missed call text back?
Start with what missed calls cost: monthly missed calls, times the share that were real new-job opportunities, times your booking rate on answered calls, your show rate, your close rate, and your average gross profit per job. That figure is the ceiling on what any fix can recover. Compare it with the monthly price of the text-back or AI receptionist you are considering, and remember that a text recovers only the callers who reply, while an AI that answers the call recovers more.
What percentage of calls do small businesses miss?
Call-answering vendors commonly claim a quarter or more of small-business calls go unanswered. Those figures come from companies selling the fix and are not independently audited, so treat them as directional. Your phone system holds the accurate number: export a full month of inbound calls, count the unanswered, abandoned and voicemail calls, and divide.
Does this tool store the numbers I enter?
No. The whole calculation runs in your browser. Your numbers are never sent to a server or written to a database or a log, and there is no email gate or signup. The only thing recorded is an anonymous, cookie-free count that the calculator was used.
What if my miss rate turns out to be low?
Then unanswered calls are not where your money is going, and you should not spend anything on fixing them. The next things worth measuring are how long a web lead waits for a first reply, and how many missed numbers ever get called back.
Read next
If the number is big, this is what closes it
An AI receptionist that answers the calls you miss, texts back the ones it cannot finish, and books the appointment — including nights and weekends. 7 days and 30 AI voice minutes free, no credit card.
Link to this tool
Free to use and free to link, no signup. If it helps your readers, copy either line below.
HTML link
<a href="https://www.leadfriendly.com/tools/missed-call-text-back-roi-calculator">Missed call text back ROI calculator</a> by Lead FriendlyCitation
Lead Friendly, "Missed call text back ROI calculator", https://www.leadfriendly.com/tools/missed-call-text-back-roi-calculator