How do I calculate the cost of missed calls for my business?

Multiply four numbers: missed calls per week × the share of callers who would have booked × your average job or appointment value × 52 weeks. Count your actual missed calls for one week from your phone system's call log rather than guessing.

Do callers who reach voicemail usually leave a message?

Many don't. A caller with an urgent need — a burst pipe, a toothache, a legal question — typically keeps calling down their search results list until a real conversation happens. Treat a voicemail drop as a likely lost lead unless your own call-backs prove otherwise.

What are my options for answering calls I can't pick up?

Four main options: hire more front-desk staff, use a human answering service, rely on voicemail and call-backs, or use an AI receptionist that answers 24/7 and books appointments directly into your calendar. Each has different costs and trade-offs.

How much does an AI receptionist cost in Canada?

Mihron AI's Maya starts at $299 CAD per month for up to 150 calls, with a Growth plan at $499 CAD per month for up to 400 calls. Pricing models across the Canadian market vary — per-minute, per-call, and flat monthly plans all exist.

When are small businesses most likely to miss calls?

The highest-risk windows are after hours and weekends, lunch breaks, peak-season surges, and any time staff are already serving customers — on a job site, chairside with a patient, or in a consultation. These are also the windows when high-intent customers tend to call.

How Much Do Missed Calls Cost Your Small Business? Here's How to Calculate It

The short answer: the cost of missed calls is your number of missed calls per week, times the share of those callers who would have booked, times your average job or appointment value, times 52. For most service businesses, that arithmetic lands in the tens of thousands of dollars a year — but you shouldn't take anyone's word for it, including ours. This guide shows you how to calculate it from your own call log in about ten minutes.

Why you shouldn't trust generic missed-call statistics

Search this topic and you'll find dramatic percentages: "X% of callers never call back," "businesses lose $Y billion to missed calls." Most of these numbers trace back to vendor surveys with unclear methodology, and they get copied from blog to blog until they sound like established fact.

You don't need them. Your phone system already records the only statistic that matters: how many calls your business actually missed. Every modern phone setup — VoIP dashboard, mobile carrier log, practice management system — can show you unanswered and voicemail-diverted calls for the past week. That's your starting point.

The four-step missed-call cost formula

Here is the whole calculation:

Missed-call cost per year =

missed calls per week × booking rate × average value per booking × 52

Step 1: Count your missed calls for one week

Pull one normal week from your call log. Count every call that rang out, hit voicemail, or came in outside business hours. Don't estimate — count. Businesses are routinely surprised by this number, especially by the after-hours and lunch-hour portion.

Step 2: Estimate your booking rate honestly

Not every missed call is a lost customer. Some are spam, some are existing customers with quick questions. Look at the calls you do answer: what fraction turn into a booked job, appointment, or consultation? Use that same fraction for your missed calls. If half your answered calls book, assume roughly half your missed calls would have too.

Step 3: Use your real average value

Your books already tell you this. For a plumber it might be the average invoice. For a dental clinic, the value of a new-patient visit — or, more honestly, the multi-year value of a patient who stays. For a law firm, the average retained matter. Pick the conservative version if you want a floor rather than a headline.

Step 4: Multiply it out

Weekly lost revenue times 52 gives you the annual figure. It's an estimate, not an audit — but it's your estimate, built from your own numbers, and that makes it worth acting on.

Three worked examples (illustrative arithmetic, not client data)

These examples show the formula in motion. The inputs are hypothetical — plug in your own.

Business	Missed calls / week	Booking rate	Avg. value	Annual cost
Plumbing company	10	40%	$450 job	$93,600
Dental clinic	8	30%	$800 new-patient visit	$99,840
Small law firm	5	25%	$2,000 retained matter	$130,000

Notice what drives the result: it isn't the number of missed calls, it's the value per booking. A business that misses only a handful of calls a week can still be leaking six figures if each caller is worth thousands. That's why "we only miss a few" is not the reassurance it sounds like.

When do the misses actually happen?

Missed calls cluster in predictable windows:

After hours and weekends — a furnace dies at 9 p.m., a toothache flares on Sunday. High-urgency callers don't wait for Monday; they call the next name in their search results.
Lunch hours — often the only time working customers can call you, and often exactly when your front desk steps away.
While you're doing the work — trades on a job site, clinicians with a patient, lawyers in a meeting. Being good at your job is precisely what makes you miss the next one.
Seasonal surges — heat waves for HVAC, storm damage for roofers, September for clinics. Call volume spikes exactly when your capacity to answer is lowest.

What you can do about it

Once you have your number, weigh it against the cost of each fix:

Hire more front-desk coverage. The most capable option and the most expensive — and it still doesn't cover nights and weekends. See our full AI vs. human receptionist comparison.
Use a human answering service. A person answers, takes a message, and relays it. Better than voicemail, but most services relay messages rather than booking directly into your calendar.
Rely on voicemail and call back fast. Free, but it depends on urgent callers choosing to wait for you. Some will. The ones with the most valuable, most urgent jobs often won't.
Use an AI receptionist. Answers every call around the clock, has the conversation, and books the appointment on the spot. Our Canadian AI receptionist pricing guide breaks down what this costs across the market.

How Mihron AI's Maya changes the math

Maya is Mihron AI's AI voice receptionist. She answers every call in English or Canadian French, books appointments directly into your calendar or practice management system, sends SMS confirmations, and transfers to your team when a human is needed. Plans start at $299 CAD per month for up to 150 calls — and setup takes 24–48 hours.

Run your missed-call number from the formula above against that monthly cost. If your estimate says missed calls cost you even a few hundred dollars a month, the comparison does the selling on its own — and if it doesn't, you've learned that too, for free. You can also plug your numbers into our ROI calculator to see the comparison against a full-time hire.