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Missed-call revenue calculator
Estimate how much revenue unanswered calls may be costing your business. Enter your own numbers: how many calls you get, how many go unanswered, how many of those are new enquiries, how many enquiries usually become customers, and what a customer is worth. There are no default figures and no sign-up. The method is explained below, and the options for answering more calls are in our AI receptionist in India guide.
By Vocora team · Published 7 October 2026
Your numbers
Everything starts blank. Use figures from your own call log and sales records. The calculator runs in your browser and doesn’t send what you type anywhere.
Fill in every field above (the last one is optional) to see your estimate. Percentages must be between 0 and 100.
How does the calculator work?
It runs five multiplications, in this order:
- Missed calls per month = calls per working day × share unanswered × working days per month. (Or the monthly figure you enter directly.)
- Missed new enquiries = missed calls × share of missed callers who are new enquiries.
- Lost customers = missed new enquiries × your usual conversion rate for enquiries.
- Revenue at risk per month = lost customers × average revenue from one new customer. The yearly figure is that × 12.
- Revenue you might win back = revenue at risk × the share you think faster answering or callbacks could recover (optional).
Where do I find each number?
| Input | Where to look |
|---|---|
| Calls per day and missed share | Your phone’s call history (filter by missed), a postpaid itemised bill, or the reports in your IVR or cloud telephony dashboard. Count a normal week, not a festival week. |
| Share that are new enquiries | Take the last 30 to 50 missed numbers and check them against your contacts or customer list. Leave out suppliers, staff, existing customers and spam. |
| Conversion rate | From your enquiry register or CRM: of the new enquiries you did answer, how many became paying customers? |
| Revenue from one new customer | Your accounts: the average first bill, or a lifetime figure if you track repeat visits. Be consistent about which you use. |
| Share you could win back | A judgement call. Try a cautious figure first, then a hopeful one, and see how far apart the answers are. |
Methodology and limits
The calculator is deliberately simple, so you can check every step by hand. Keep these limits in mind when you read the result:
- It assumes missed callers convert like answered ones. Some missed callers will try again or call back on their own, which would make the estimate too high. Others will simply call the next business on the list, which it ignores.
- Repeat calls inflate the count. If one person tried three times, count them once. Unique missed numbers are a better input than raw missed calls.
- Seasons change everything. Admission season, wedding season and festive sales can look nothing like a normal month. Run it for both.
- It is revenue, not profit. It does not subtract the cost of serving those customers or of answering the calls.
- No benchmarks are built in. We did not find reliable, public data on missed-call rates or conversion for Indian small businesses, so we don’t suggest any. If you see a confident industry statistic elsewhere, check where it came from.
What should I do with the result?
- Answer more calls first. Forward your number to a colleague or an AI receptionist when the line is busy or unanswered. Our call-forwarding guide has the steps for Jio, Airtel, Vi, BSNL, landlines and PBX systems.
- Call back fast, and say who you are. DoT told Parliament in August 2026 that Calling Name Presentation (CNAP) was still in trials for 4G and above, so many people will see only your number. Under TRAI’s amended TCCCPR, consent given for an ongoing transaction is valid for 7 days, another reason not to leave callbacks for later.
- Confirm on WhatsApp. A booking confirmed in writing is less likely to be forgotten. See missed-call recovery with Voice + WhatsApp.
- Script the first ten seconds. Our receptionist call scripts include a missed-call callback template.
Industry examples: clinics, car service centres, real estate, or all 18 industry playbooks. Terms such as CNAP and call forwarding are explained in the glossary.
FAQ
How do I calculate revenue lost from missed calls?
Multiply your missed calls per month by the share that are new enquiries, then by the share of enquiries that usually become customers, then by the average revenue from one new customer. Multiply by 12 for a yearly figure.
Why doesn’t the calculator have default numbers?
Because missed-call rates, conversion and customer value vary enormously between a clinic, a workshop and a coaching institute, and we could not find reliable public benchmarks for Indian businesses. A default would quietly become your answer. Your own call log is a better starting point.
Does the calculator include the cost of an AI receptionist?
No. It only estimates what unanswered calls put at risk. Compare the result with any quote you get, from Vocora or anyone else, and with the cost of extra staff hours.
Is my data saved?
No. The calculation runs in your browser and nothing you type is sent to us or stored.
Missed call se kitna nuksaan hota hai, kaise pata karein?
Apne call log se ek mahine ki missed calls giniye, unmein se naye enquiries ka hissa nikaaliye, phir aapka normal conversion rate aur ek naye customer ki average billing lagaiye. Upar ka calculator yahi hisaab karta hai.
What is a good way to recover missed calls?
Answer more calls in the first place (call forwarding to a colleague or an AI receptionist when the line is busy or unanswered), and call back the rest quickly with your business name in the first sentence.
Sources
- PIB — TRAI strengthens consumer protection with amendments to TCCCPR, 2018 (12 February 2025)
- Lok Sabha Unstarred Question 2851 — Calling Name Presentation (CNAP) system, answered 5 August 2026 (DoT)
The calculator gives an estimate based only on the numbers you enter. It is not a forecast, a quote or financial advice.
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