Ask a small business owner of a plumbing company, a dental office, or a salon whether they miss calls, and most will say, “a few, sometimes.” Ask how many, and when, and what those calls were worth, and the answer usually turns into a shrug.
That shrug is expensive. For a service business, the phone is often the front door: It’s where a new customer decides whether to book with you or call the next name on the list. You can’t manage what you haven’t measured, though, and the good news is that measuring this takes about an hour and costs nothing.
Here’s how to work out what missed calls cost your business, using your own numbers instead of someone else’s statistics.
Step 1: Pull One Normal Week Of Call Records
Almost every business phone system keeps a call log: your mobile carrier’s app, a VoIP provider’s dashboard, or the online account for your desk phones. Export or screenshot one ordinary week. Avoid holiday weeks and your slowest season.
For each call you want three things: the time it came in, whether it was answered, and the caller’s number. If your system shows “missed” or “unanswered” calls separately, even better.
A quick warning about the industry statistics you find online: Many of the widely quoted figures on missed calls and voicemail come from companies that sell phone-answering products, and they vary enormously. Your own log is the only number that matters for your business.
Step 2: Count The Unanswered Calls, Then Sort Them By Time
Count how many calls went unanswered. Then group them into a few buckets:
- Business hours, while you were busy: with a customer, on a job site, or on another call
- Lunch and breaks
- Before opening and after closing
- Weekends
The pattern usually tells you more than the total. A contractor might find most misses happen between 9 a.m. and noon, when everyone is out on jobs. A clinic might find a spike over lunch. That pattern decides which fix makes sense.
Step 3: Find Out Who Those Callers Were
Not every missed call is lost money. Compare the missed numbers against your customer list:
- Existing customers usually call back or leave a message. They know you.
- Unknown numbers are where the risk is. These are most often new customers, and a new customer who reaches voicemail has very little reason to wait for you.
- Spam and sales calls can be crossed off.
Then check what happened next. Did the unknown caller ever call back? Did they leave a message? Did they book? If you return missed calls, note how many you reached and how many had already hired someone else. That last number is the most honest measure of what voicemail is costing you.
Step 4: Put a Dollar Figure On a New Customer
You need one number: roughly what a new customer is worth to you. Keep it simple:
Average first job or visit × the number of times a typical customer comes back in a year.
A plumbing company might use the average service call. A salon might use the average visit times visits per year. A dental office might use the value of a new-patient exam plus routine cleanings for a year. Use conservative numbers; the point is a reasonable estimate, not a sales projection.
Step 5: Do the Math
Now multiply:
Missed calls from unknown numbers per week × the share that didn’t call back or book × what a new customer is worth
Multiply by 50 for a rough yearly figure. For example, if you miss eight calls a week from unknown numbers, half of them never come back, and a new customer is worth $400, that’s four lost customers a week, or about $1,600 a week, before anyone has decided whether the fix is worth paying for.
Your numbers may be much smaller, and that’s a useful answer too. If the cost turns out to be modest, the right fix is a cheap one.
Step 6: Compare That Cost With Your Options
Once you know what missed calls cost, you can judge the fixes honestly. Here are the realistic choices, roughly from cheapest to most expensive.
Better habits, at no cost. Set a clear voicemail greeting that says when you’ll call back, and keep that promise. Block out two call-back windows a day. Forward calls to a second person during your busiest hours. For many very small businesses, this alone closes most of the gap.
A part-time or full-time receptionist. A person gives the best experience for complicated or emotional calls. The U.S. Bureau of Labor Statistics puts the median pay for receptionists at $18.27 an hour (May 2025), before payroll taxes and benefits, and one person can only take one call at a time and can’t cover nights and weekends alone.
A live answering service. Usually priced per minute or per call, often with monthly minimums. Good for after-hours coverage and taking messages; less good if callers need detailed answers about your services, since the agents are handling many businesses at once.
An AI voice receptionist. Newer software can answer every call at any hour, answer questions from information you provide, and book or route calls. It works best for repetitive calls such as hours, pricing you’re happy to share, scheduling, and simple intake. It still needs setup and testing, unusual calls may need a human, and you should check what it records and how it handles customer information before turning it on.
Many businesses end up combining these: better habits plus one paid layer for the hours they miss most.
Step 7: Measure Again In a Month
Whatever you choose, pull another week of call logs a month later and run the same numbers. If unanswered calls from unknown numbers dropped and bookings went up, the fix is paying for itself. If not, you’ve learned something without signing a long contract.
If you’d like a second pair of eyes on the numbers or a plan, free business mentoring is available through SCORE, and the U.S. Small Business Administration’s Manage Your Business resources cover customer service and day-to-day operations.
The Bottom Line
Missed calls feel like a minor annoyance because you never hear from the people who gave up. An hour with your call log turns that guess into a number, and once you have the number, choosing a fix becomes a straightforward business decision.
Phillip Archuleta is the founder of Net Infusion Corp, an Albuquerque, New Mexico software company that builds tools for small businesses, including the AI voice receptionist VANTA. To hear how an AI receptionist handles a call, you can try a live demo at vantavoicesystems.com.
