Research report · Dataset and article

The cost of missed calls small business owners absorb

The cost of missed calls small business owners carry is not a published statistic, it is an arithmetic. Calls that go unanswered, the share that were new business, the share that never come back, and what a first job or first visit is worth.

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The Missed-Call Cost Index is AssistBPO's first-party method for that arithmetic, published now with its assumption table; the first-party dataset measured on client desks arrives in the next edition.

The formula

Revenue at risk per 100 calls = 100 × (1 − A) × N × (1 − R) × K × T

A
Answer rate: calls answered by a person, divided by calls offered, business hours and after-hours computed separately
N
New-inquiry share of inbound calls
R
Callback recovery rate: missed new inquiries reached by callback, or who call back, and still book
K
Close rate on answered new inquiries
T
Average first-job or first-visit value, in your currency

At the planning defaults in the table below and business-hours answering, 100 × 0.20 × 0.40 × 0.70 × 0.50 comes to 2.8 first jobs at risk per 100 inbound calls; with no after-hours coverage the same 100 calls put 14 at risk. Multiply by your own T. The missed-call cost calculator runs the arithmetic with your numbers.

The assumption table

TypeParameterDefault or rangeUnitBasisYear
InputInbound calls per monthClient-suppliedcallsClient-supplied from the phone system report2026
InputAverage first-job or first-visit valueClient-suppliedlocal currencyClient-supplied from invoicing or the practice system2026
RateAnswer rate, business hours (A)80%Planning default; replaced by the phone system's answered-to-offered ratio2026
RateAnswer rate, after-hours with no live coverage (A)0%Definition: no person answers2026
RateNew-inquiry share of inbound calls (N)40%Planning default; measured per client in the first-party edition2026
RateCallback recovery rate (R)30%Planning default: share of missed new inquiries reached by callback, or who call back, and still book2026
RateClose rate on answered new inquiries (K)50%Planning default; segment values arrive with the first-party dataset2026
Cost of coverHuman answering service plan (50 to 500 minutes)235 to 1095USD per monthOnceHub, September 20262026
Cost of coverAI receptionist, flat plan25 to 300USD per monthAIRA, NextPhone2026
Cost of coverIn-house receptionist, median pay38010USD per yearUS Bureau of Labor Statistics, May 20252025
Cost of coverDedicated AssistBPO receptionistClient-suppliedn/aNo published rate card; custom staffing plan within 1 business day2026

Planning defaults are not measurements and not client results.1 Cost-of-cover rows are third-party plans as published. Plans start at $400 a month for 40 hours, at $10 an hour, and rates improve as you add assistants. Get a staffing plan within 1 business day.

The first-party dataset

This edition publishes the method and the assumption table only. The first-party dataset arrives in the next edition: answer rates, speed to answer, after-hours volumes, new-inquiry share and callback recovery measured on AssistBPO client desks, aggregated by segment with a minimum cell size so no single client can be identified. Until then the defaults above are planning values and are labeled as such.

Download: missed-call-cost-index-2026.csv (parameter, segment, low, high, unit, basis, year).

Methodology

  • Missed calls = inbound calls × (1 − answer rate A). Business hours and after-hours are computed separately because the answer rate differs.
  • New business missed = missed calls × new-inquiry share N. Existing customers who call back are not counted as lost revenue.
  • Lost opportunities = new business missed × (1 − callback recovery rate R).
  • Revenue at risk per month = lost opportunities × close rate K × average first-job or first-visit value T.
  • The index itself is revenue at risk per 100 inbound calls: 100 × (1 − A) × N × (1 − R) × K × T. It lets two businesses with different volumes compare their exposure on one scale.
  • Cost of cover is shown beside the index so the decision reads as a comparison: what missing calls costs against what answering them costs, from published third-party plans. AssistBPO has no published rate card.

How we count every number on this site

Guides that apply this index

Written from the same sources, with the arithmetic worked through on a real decision.

How do you cite this index?

AssistBPO, Missed-Call Cost Index 2026, assistbpo.com/research/missed-call-cost-index/, edition 2026. Licensed CC BY 4.0.

Please link to this page and keep the edition year. Corrections are welcome through the contact page and get a new date.

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