A missed call does not feel expensive. Nobody sees it happen, and there is no line item for it on the P&L. But for any business where new customers arrive by phone, it is often the single most expensive thing that happens all day.
Speed decides who wins
The best-known research on response time comes from a 2011 Harvard Business Review study by James Oldroyd, Kristina McElheran and David Elkington. Looking at how companies responded to web leads, they found that firms that tried to contact a lead within an hour were nearly seven times as likely to qualify it as firms that waited even one hour longer, and more than 60 times as likely as firms that waited a day or more.
Most companies were nowhere near that fast. Only 37% responded within an hour, and the average response time was 42 hours.
The lesson generalizes beyond web forms: interest is perishable. Every hour between "I need this" and "someone got back to me" is an hour in which a competitor can answer first.
Many businesses do not pick up at all
Response time assumes someone responds. Often, nobody does.
The 2024 Clio Legal Trends Report sent secret shoppers to contact law firms as prospective clients. Only 40% of firms answered the phone, down from 56% in 2019, and only 33% replied to email. Nearly half of firms (48%) neither answered nor called back.
Law firms are not unusual here; they are just well studied. Any business whose staff are busy serving the customer in front of them, whether that is a patient, a diner or a homeowner, faces the same trade-off every time the phone rings.
How to estimate what it costs you
You do not need an industry benchmark to size the problem. You need four numbers from your own business:
- Inbound calls per month from your phone system.
- The share that go unanswered or to voicemail, also from your phone system.
- Your conversion rate from a new-customer call to a booked job, appointment or sale.
- The average value of a new customer, ideally over their lifetime.
Multiply them together:
Missed calls per month × share that are new customers × conversion rate × customer value = revenue at risk each month
Be conservative. Not every missed caller was going to buy, and some will call back. Even so, most owners are surprised by the result, because the cost of each missed call is the value of a customer, not the cost of a phone line.
What actually fixes it
There are three ways to close the gap, and they work best together:
- Answer every call. A voice agent can pick up on the first ring, at any hour, collect details, book the appointment and hand off anything complex to your team.
- Respond to every lead in minutes. Web forms and emails can trigger an immediate text or call-back, instead of waiting for someone to check the inbox.
- Follow up automatically. Open estimates and unanswered quotes get polite, persistent follow-ups until the customer decides.
None of this replaces your team. It makes sure your team only spends time on the conversations that need a person.
Want to see the numbers for your business? Our ROI calculator is a good place to start.
