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Missed calls.What they cost you.

Put in your own numbers. The maths is shown line by line, and nothing you type leaves your browser.

The short answer

Updated

The missed-call calculator estimates what unanswered calls cost a service business each month. You enter your weekly calls, the share you miss, how many of those callers don't try again, how often a call becomes a job and your average job value. It multiplies them out, shows every step and runs entirely in your browser.

Your numbers

All inbound calls, from your phone records.

Calls that ring out or go to voicemail.

Your best guess, or check how many missed numbers never called back.

Out of calls you do answer.

Average invoice for a first job.

With these numbers

$4,680

a month in jobs that went to someone else. $56,160 a year.

The maths

Missed calls a month
52
60 × 4.33 weeks × 20%
Callers who go elsewhere
26
52 × 50%
Jobs those callers were worth
10.4
26 × 40%
Revenue a month
$4,680
10.4 × $450

Damex's Missed calls and AI receptionist service is $197 a month. At $450 a job, it pays for itself if it saves 0.4 jobs a month.

With your numbers and the maths, ready to save as a PDF.

How it works.No hidden steps.

  1. 01Missed calls a month: calls per week times 4.33 weeks times the share you miss.
  2. 02Callers lost: missed calls times the share who don't call back.
  3. 03Jobs lost: callers lost times the share of calls that become a booked job.
  4. 04Revenue lost: jobs lost times your average job value. The yearly figure is that times 12.

What we store: nothing. The numbers you type stay in your browser and aren't sent or saved.

Questions people ask.Short answers.

Where do the starting numbers come from?

They are round numbers to show how the calculator works, not industry benchmarks. Use your own call logs for a real estimate.

How do I find my share of missed calls?

Your phone provider's call log or call tracking report shows answered and unanswered calls. Count a typical week, not your quietest.

Can I text back every missed caller?

Texts count as calls under federal rules, and we found no FCC statement that a missed call is consent to be texted. Keep the first reply informational with a STOP line, and continue only if the customer replies.

Sources

  1. FCC: Stop unwanted robocalls and texts · checked Oct 31, 2026
  2. 47 CFR 64.1200: Delivery restrictions (TCPA rules) · checked Oct 31, 2026

By Shakhawat Ullah Badhon, Founder, Damex Digital. Published Oct 31, 2026, updated Oct 31, 2026.