The True Cost of Missed Calls Across Industries (Research)

Every unanswered call represents a small, mostly invisible loss — no invoice, no line item, just a customer who called someone else instead. Because that loss doesn't show up anywhere in standard bookkeeping, it's one of the least-tracked costs in small business operations, even though several research organizations focused on call analytics and marketing attribution have tried to quantify it. BIA Advisory Services, Invoca, and Twilio have each published research relevant to the question, and their findings — while using different methodologies — point in a consistent direction.

A note on sources: call analytics research is generally produced by companies that sell call tracking, call routing, or communications software, which have a commercial interest in demonstrating that calls matter. That context is worth factoring in. However, the underlying mechanics — a missed call is a lead with no immediate opportunity to convert — are not really in dispute, and the scale of the surveys involved (typically thousands of calls or businesses analyzed) makes the directional findings useful even where individual figures shouldn't be treated as precise. Much of the available research uses US call volume data; Canada-specific studies at this level of detail are limited.

A Significant Share of Business Calls Go Unanswered

Research aggregated by Invoca on inbound call handling across its client base found that approximately 20–30% of calls to small and mid-size businesses go unanswered during business hours, with the share rising substantially outside standard hours. The range varies significantly by industry and by how the business is staffed — a solo operator working in the field is simply not near a phone the way a business with a dedicated front-desk role is.

Home Services and Trades See Some of the Highest Missed-Call Rates

BIA Advisory Services, which has published research on call-driven revenue for local businesses for over a decade, has consistently found that phone calls remain one of the highest-value lead sources for home services businesses — plumbers, electricians, HVAC contractors, and similar trades — because a caller in this category is frequently already in urgent need of the service, converting to a booked job at a notably higher rate than a web form submission. That same research has flagged that trades businesses, whose technicians are often on job sites and away from a phone, tend to report some of the highest missed-call rates of any sector studied.

The revenue implication compounds because trades calls tend to carry higher average job values than many other service categories — a missed call for a same-day HVAC repair or an emergency plumbing call represents a meaningfully larger lost opportunity than a missed call to, say, a retail store with a low average transaction size.

Legal and Health Services: Lower Volume, Higher Value Per Call

Call tracking research from Invoca and similar attribution platforms has found that law firms and health-adjacent service businesses (dental, physiotherapy, specialty clinics) generally receive lower call volumes than trades or retail, but each call carries substantially higher potential lifetime value — a new client relationship rather than a single transaction. Missed calls in this category are frequently characterized in industry research as disproportionately costly precisely because the volume is too low to average out an occasional loss.

Callers Rarely Leave a Voicemail

Multiple sources in the call analytics literature, including data referenced by Twilio in its business communications research, point to a well-established pattern: the large majority of callers who reach voicemail do not leave a message, and instead either call a competitor or abandon the inquiry entirely. This finding is one of the more consistent ones across the research base and has significant implications for any business relying on "just leave a message and we'll call you back" as its default missed-call strategy — the data suggests most of those calls simply never generate a callback opportunity in the first place, because no message was left.

Retail and Restaurant Calls Skew Toward Simple, High-Volume Questions

Research on call patterns for retail and food service businesses has found that a large share of inbound calls in these categories are simple, high-frequency questions — hours, availability, order status — rather than complex sales conversations. This matters for how businesses in these categories should think about missed calls: the cost per missed call is typically lower than in trades or health services, but the volume of calls involved is often much higher, meaning the aggregate cost across a month can still be significant even though no single missed call feels consequential on its own.

What This Means for Canadian Small Businesses

The research consistently points to the same underlying reality across every industry studied: a missed call is not a neutral event, and callers who don't reach a person rarely give the business a second chance through voicemail. What differs by industry is the shape of the cost — trades and health services tend to face fewer, higher-value missed opportunities, while retail and restaurants face more frequent but lower-value ones. Either way, the aggregate revenue impact over a year is rarely trivial once a business actually measures its missed-call rate rather than assuming it's low.