The Hidden Cost of Missed Calls: How Much Is Your Business Losing?

Updated: 3 November 2026. Published figures below describe specific studies and samples; they are not universal averages.

• Key findings at a glance
• Introduction
• How much does a missed call actually cost?
• The voicemail myth
• The competitor problem
• When are calls most likely to be missed?
• Industry deep dives
• The formula: calculate your own loss
• The hidden multipliers
• What businesses can do
• Summary
• Sources & references

Key findings at a glance

• 14%: the home services missed-call rate reported in CallRail’s 2025 benchmark. Healthcare, legal and real estate had different rates in the same report. [1]
• 68%: the share of callers who did not call back after failing to reach a business on their first attempt in Marchex’s 2019 US auto services study. This does not measure lost sales. [2]
• 42%: the share of surveyed SMB owners and managers who estimated losses of more than $500 per month from missed customer calls in Vida’s 2025 survey. These are self-reported estimates. [3]
• The cost depends on your business: estimate it using unique sales inquiries, recovery rates, conversion rates and a clearly defined revenue value.

Introduction

A phone number on your website makes your business easy to call. It does not tell you how often callers actually reach someone.

In a study published on 18 January 2016, 411 Locals monitored calls to 85 businesses across 58 industries for 30 days. It reported that 37.8% were answered, 37.8% went to voicemail and 24.3% received no response. In that sample, about 62% of calls did not receive a live answer. [4]

This is a historical finding from a small sample, not a current average for small businesses. It describes calls, not unique customers or confirmed lost sales. The published percentages total 99.9% because of rounding.

To understand the financial impact, businesses need to connect their call records with sales outcomes: which inquiries were missed, which were recovered and which might otherwise have become paying customers.

How much does a missed call actually cost?

A missed call has no single, reliable dollar value across businesses. A new sales inquiry, an existing customer’s question and a repeat attempt from the same caller have different financial implications.

Published missed-call benchmarks can help identify a problem. They cannot establish the value of every missed call. The table below keeps one dataset together rather than combining unrelated studies into an apparent industry range.

Source: CallRail’s January 2025 benchmark announcement, describing an analysis of 1.1 million de-identified conversations across seven industries. That is the total dataset, not the sample size for each row. These are vendor-platform benchmarks, not population-wide averages. Healthcare is a broad category; 32% is not a dental-specific estimate. [1]

For your own estimate, use the revenue from a completed sale or a defined customer cohort. A job price, first-year customer revenue and lifetime customer value are different measures and should not share one “cost per missed call” column.

The voicemail myth

Voicemail can capture inquiries, but relying on messages alone leaves gaps. In a 2024 article about home services, Invoca reported that fewer than 3% of callers pushed to voicemail left a message in its platform data. The article does not give the sample size or observation period for this figure. [5]

This finding does not establish a universal voicemail rate. It does support a practical check: compare the number of calls routed to voicemail with the number of messages received, and review missed-call records even when no message was left.

The competitor problem

A caller who cannot reach you may try another provider. Marchex’s study, based on more than 8.7 million calls across 11 US auto services brands, found the non-return rate highlighted above. [2]

Not calling back does not prove that someone bought from a competitor. The business may have returned the call, or the customer may have used another contact channel. Use the finding as a reason to follow up promptly, rather than as a universal lost-customer multiplier.

Assign responsibility for missed inquiries and record the outcome of each follow-up. This shows how much demand your business recovers instead of assuming every unanswered call is permanently lost.

When are calls most likely to be missed?

The answer should come from your own call records. Review call volume and missed-call rates by day, hour, location and routing scenario. Useful periods to check include:

• Opening time and the start of the working week: check whether incoming demand exceeds available staff.
• Staff breaks and busy on-site periods: check whether calls have a backup destination.
• Evenings, weekends and holidays: check what happens when the normal team is unavailable.

These are audit suggestions, not measured peak periods for every business. Calculate both the number and the proportion of calls missed in each period: a busy hour can have many missed calls without having the highest missed-call rate.

Industry deep dives

Home services (HVAC, plumbing, electrical, construction)

Invoca’s 2024 home services article reported that 27% of calls were not answered. [5] This comes from a different source than the CallRail benchmark above; the two figures should not be combined into a single rate or used to infer a trend.

For a contractor, separate new job inquiries from existing-customer calls and repeat attempts. Estimate the financial effect using your own completed-job conversion rate and revenue per job.

Dental practices

A missed dental call may concern a new appointment, an existing treatment, a cancellation or an administrative question. Counting every missed call as a lost new patient overstates the acquisition loss.

The healthcare benchmark above is not a dental-specific estimate. A practice should track unique new-patient inquiries, successful follow-up, completed visits and actual first-year patient revenue before assigning a financial value.

Law firms

Clio’s 2024 secret-shopper study contacted 500 law firms. Only 40% answered the initial phone call; 52% either answered or called back, leaving 48% unreachable by phone in the exercise. [6]

These are percentages of firms tested, not the share of all incoming calls missed. Separately, the CallRail table reports a call-based legal benchmark. For a firm’s revenue estimate, use qualified case inquiries and the proportion that become paying matters.

SMBs overall

Vida’s survey was conducted with SurveyMonkey in March 2025 among 320 SMB owners and managers and published in May. It also found that 22% used AI voice agents specifically; this does not mean that only that share used any form of automation. [3]

Survey estimates help describe respondents’ perceptions. They should not be presented as audited losses or the average loss for all small businesses.

The formula: calculate your own loss

Use the following planning model to estimate revenue at risk from missed new-business inquiries:

Estimated annual revenue at risk = U × (1 − R) × C × V × 12

• U: unique qualified sales inquiries per month whose initial call was missed. Count each opportunity once; exclude spam, duplicate attempts and non-sales calls. If the purpose of a missed call is unknown, estimate qualification separately and label that assumption.
• R: the share of those inquiries successfully recovered through a callback, a repeat call or another channel in time for the customer’s decision.
• C: the estimated completed-sale conversion rate those unrecovered inquiries would have achieved if handled. Use comparable answered inquiries as a starting point and state the assumption.
• V: average revenue per completed sale. For a first-year customer model, use revenue per acquired customer over that first year consistently instead.
• 12: annualizes a representative monthly estimate. For a seasonal business, estimate each month separately and add the results.

This is an illustrative forecasting model, not a formula validated by the studies above. The behavior of missed callers may differ from that of answered callers. If recovery or conversion is unknown, show alternative assumptions rather than presenting a single total as a measured loss.

Every input in these three examples is an assumption, including $850; none is presented as an industry average. Scenario C measures the first-year value of patients who might have been acquired during a year. That revenue would not all necessarily have been received in the same calendar year.

These figures estimate potential revenue, not profit or guaranteed recoverable sales. To assess an investment, apply the relevant contribution margin and compare the incremental contribution you expect to recover with the additional operating costs.

The hidden multipliers

Missed inquiries can affect more than the first transaction. Keep the following effects separate so they do not inflate the same loss twice:

Marketing efficiency. Track which paid campaigns generate missed sales inquiries and whether they are recovered. An overall missed-call rate cannot establish what share of your advertising budget was wasted.

Repeat business. For customer acquisition, lifetime value can be an alternative valuation horizon. Do not add full lifetime revenue to a first-sale estimate that it already includes.

Referrals. Missed relationships may reduce future recommendations, but do not apply a fixed referral multiplier without your own supporting data.

Customer experience. Review complaints and reviews for communication problems. Their financial effect should not be inferred from an unsupported universal percentage.

What businesses can do

1. Measure first. Review missed calls and follow-up outcomes. Zadarma’s Cloud PBX offers call statistics, queues and missed-call notifications.
2. Set up backup routing. Use forwarding and call distribution to reach an available employee when the first destination does not answer. Test the full caller journey.
3. Cover periods without staff. Zadarma’s AI Voice Agent can answer incoming calls around the clock, respond using a knowledge base and transfer calls according to configured rules. Define what happens when a human employee is unavailable.
4. Offer a click to Call option. Zadarma’s free Click to Call widget lets visitors call your team directly from their browser, without dialing a phone number or installing an app.
5. Manage follow-up in CRM. Free Teamsale CRM integrates with Zadarma PBX and maintains customer interaction history. Assign follow-up responsibilities and check that the required records and workflows are configured.

Measure completed sales and incremental contribution after making changes. The return depends on the inquiries recovered, their conversion and value, and the cost of handling them.

Summary

Published studies show gaps in call handling, but their samples and definitions differ. A historical small-business study, a vendor-platform benchmark and a secret-shopper exercise cannot be treated as interchangeable measurements.

The useful business question is how many unique sales inquiries you miss, how many you recover and how many might otherwise have become customers. Combine call records with CRM outcomes to estimate the revenue at risk and decide where better routing, coverage and follow-up can help.

Sources & references

Sources checked on 3 November 2026. All financial examples are explicitly illustrative. Business results depend on call mix, recovery, conversion, revenue horizon and operating costs.