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The missed call revenue calculator for local businesses

Every unanswered call is a customer deciding whether to wait or dial your competitor. This free tool turns your call volume into a dollar figure in about thirty seconds.

Quick answer: To estimate lost revenue, multiply your monthly calls by your miss rate, then by your booking rate, then by your average job value. A plumber taking 400 calls a month, missing 25%, booking 40% of real leads worth $480 each loses about $19,200 per month. Plug in your own numbers below.
Calculate

Your numbers, in real time

Drag the sliders or type directly. Everything updates instantly and stays in your browser.

Check your phone bill or call log for total inbound calls.
Includes voicemail, busy signals, and rings that go unanswered after hours or during jobs.
The rest are spam, vendors, wrong numbers, or existing customers.
How often a qualified caller becomes a paying job or appointment.
Use one transaction, or lifetime value if you have repeat clients.
Estimated revenue lost
$0
per month · $0 per year
Missed calls / month0
Missed real leads0
Lost booked jobs0
Recovering even half of these calls would add $0 a month.

This is an estimate based on the inputs you provide. It is not a guarantee of results. The most accurate figures come from your own phone records and CRM. We never store these numbers.

The method

How the math works

No black box. Here is exactly what the calculator does with your inputs.

Find missed calls

Multiply your monthly calls by your miss rate. 400 calls at a 25% miss rate is 100 missed calls.

Keep the real leads

Multiply missed calls by the share that are genuine prospects. 100 × 70% leaves 70 missed leads.

Apply value

Multiply missed leads by your booking rate, then by average job value. 70 × 40% × $480 ≈ $13,440 lost.

Why missed calls cost more than they look

A missed call is rarely a delayed sale. It is usually a lost one. When a prospect calls a plumber, dentist, or law firm and reaches voicemail, most of them hang up and dial the next name on the search results. They are not waiting for a callback. They are buying now.

That behavior is why the cost compounds. You paid to make the phone ring — through ads, referrals, your website, your Google profile. The marketing cost is already spent whether or not anyone answers. A missed call wastes that spend twice: once on the lead you lost, and again on the impression you gave that you were closed or too busy to care.

The after-hours gap is the biggest leak

For most local businesses, a large share of calls arrive outside 9-to-5. People call on their lunch break, after work, on weekends, or the moment a pipe bursts at 11 p.m. If your phone rolls to voicemail then, you are handing those high-intent emergencies to whichever competitor picks up. Answer the after-hours phone and you often capture the highest-value, most urgent jobs.

What to do with your number

Once you know your monthly figure, the decision gets simple. Compare the cost of missed revenue against the cost of fixing it:

KaiCalls is a secretary that answers your business line around the clock, captures the caller's details, and books or routes the job. If your calculator number is uncomfortable, that gap is what it closes.

FAQ

Missed call questions, answered

How do you calculate lost revenue from missed calls?
Multiply your monthly inbound calls by the percentage you miss to get missed calls. Multiply that by the share that were potential customers, then by your booking rate, then by your average job value. The result is estimated lost revenue per month. This calculator does each step for you.
What percentage of business calls go unanswered?
It varies by industry and staffing, but many local service businesses miss roughly 20 to 30 percent of inbound calls, and the rate climbs higher after hours, during jobs, and at peak times. For an exact figure, pull the answered-versus-missed report from your phone system.
Do missed callers call back?
Often they do not. A large share of callers who hit voicemail or a busy signal call the next business on their list instead of trying again. That is why a missed call usually equals a lost customer, not a delayed one.
Is this calculator free and private?
Yes. It is completely free, runs entirely in your browser, and needs no signup. Nothing you type is sent anywhere unless you choose to request an audit at the bottom of the page.
How can a small business stop missing calls?
You can add staff, use an overflow answering service, or have a 24/7 secretary answer every call, qualify the caller, and book or take a message. The right choice depends on your call volume and average job value — the two numbers this calculator helps you put a price on.
Optional next step

Want us to check your number against your real call data?

We will look at your actual answered-versus-missed pattern and tell you, honestly, whether the leak is worth fixing. No fake ROI, no pressure.

Request a free missed-call audit

A KaiCalls secretary answers every call 24/7 — but first, let's see if you even have a gap worth closing.

Free. We use your own numbers — no guesses, no spam.

Got it — request received.

We'll review your call pattern and reply by email shortly. Thanks for trying the calculator.