What a missed call really costs a service business (and how to work out yours)

A missed call costs you the value of the customer it would have become, multiplied by how often a missed call turns into a lost customer. For most service businesses that is not one lost job a month. It is a steady leak that grows with every dollar you spend on ads.

How do you calculate what missed calls cost?

Use four numbers you already know: enquiries per month, the share that go cold because nobody replied in time, how many answered enquiries become customers, and what a customer is worth.

Monthly cost of slow replies = enquiries per month × share going cold × close rate × customer value.

Our free report uses a close rate of 1 in 4 answered enquiries. You can swap in your own. The share going cold depends on reply speed, so it is the number worth measuring first.

What share of enquiries goes cold?

Nobody can give you one true number for your business, so measure it. Until you do, our model uses these assumptions: 5% when you reply in under five minutes, 15% within the hour, 25% the same day and 40% the next day. Voicemail after hours adds 4 points, no after-hours cover at all adds 8, and no follow-up adds 7.

These are planning assumptions, not research findings. They are deliberately round so you can check them against your own call log.

What does that look like for a real-sized business?

Take a plumbing company with 120 enquiries a month and a $450 average job, replying next day with voicemail after hours and no follow-up. The model puts 51% of enquiries going cold: 61 a month. At 1 in 4 becoming a job, that is about 15 jobs, or roughly $6,900 a month.

Cut replies to under a minute and switch on follow-up, and the model drops to 5% going cold. The same ad budget now books around 14 more jobs a month. See the full worked examples.

How do you measure your own missed-call rate this week?

• Pull last month's call log from your phone provider and count calls marked missed or sent to voicemail.
• Submit your own website form at 8pm on a weekday and time the reply.
• Call your own number during lunch and on a Saturday.
• Check how many of last month's enquiries got a second message after the first.

Those four checks take under an hour and give you real inputs for the formula.

What are the cheapest fixes?

Start with the fixes that stop the leak without adding staff. A missed-call text-back sends an instant message to anyone whose call you miss, with a booking link. An after-hours answer, from an answering service or an AI receptionist, stops nights and weekends going to voicemail. A short follow-up sequence catches people who were interested but did not book first time.

Fix reply speed before you raise ad spend. More traffic into a slow funnel mostly buys voicemails.

Want the number for your own business? Paste your website and the free report runs this formula with your inputs.