Every "missed calls cost you $126,000 a year" headline has the same weakness: it's someone else's average, not your business. The only figure worth acting on is the one you calculate from your own phone. So here's the method — five inputs, honest arithmetic, no scary number invented on your behalf. Bring a coffee and your own real data.
One thing to hold while you read: the missed call is the leak you can hear, but it's a symptom, not the disease. What actually moves revenue is the whole machine behind the phone — capture, booking, follow-up, reviews, reactivation, reporting — running as one system instead of six tools and your own memory. This article covers the audible part; the fix worth pricing is the machine.
Why do this yourself
Averages are useful for a gut-check and useless for a decision. Across small businesses, unanswered calls cost about $126,000 a year and 62% of callers who can't reach you go straight to a competitor — but your loss could be a fraction of that or several times it, depending on your job value and volume. The point of a calculator is to replace the headline with something true for you.
Step 1 — Your weekly call volume (call it A)
Start with how many inbound calls your business gets in a typical week. Pull it from your phone system or carrier log, not memory — memory undercounts. Include the after-hours calls, because that's where a lot of the leak lives: in home services, 41% of jobs booked online come in after hours. Write down A = calls per week.
Step 2 — Your miss rate (call it B)
Now, honestly, what share of those calls goes unanswered — rings out, hits voicemail, or comes in while your one line is busy? If you don't have your own number, the industry gives you an anchor: roughly 27% of calls to home-services businesses go unanswered, and more broadly, about 62% of small-business calls go unanswered. Use your own if you have it; borrow the benchmark if you don't. Write down B = your miss rate (as a decimal, e.g. 0.25).
One thing not to do: don't assume missed callers leave a voicemail you'll return. Fewer than 3% of callers pushed to voicemail leave a message. A missed call is almost always a lost conversation, not a delayed one.
Step 3 — Your close rate (call it C)
Of the calls you do answer and that are real opportunities, what share turns into a booked job or a paying client? In home services, about 45% of answered leads convert on the call. Your close rate is your best estimate of how many of the missed calls you would have won if you'd picked up. Write down C = your close rate (as a decimal).
Step 4 — Your average job value (call it D)
This is the one number only you can supply, and it's the one that moves the answer most. Use your true average — a service ticket, a booked appointment, or, if it fits your business, the lifetime value of the relationship rather than the first visit. A single transaction and a multi-year client are very different Ds. Write down D = your average value per won job.
Step 5 — Put it together
Now the arithmetic, in plain form:
Weekly lost revenue = A × B × C × D Annual lost revenue = that number × 52
Read it left to right: your weekly calls, times the share you miss, times the share you'd have closed, times what each is worth — then annualized. That's it. No invented total from us; you built it from your own five numbers. If the annual figure is small, close this tab with our blessing — some businesses genuinely don't have a missed-call problem worth solving. If it reads like a salary, you now know the size of the leak you've been paying without an invoice.
What to compare it against
Once you have your number, the decision is a comparison, not a leap. The common fix is a hire: a fully loaded front-desk person runs $50,000 or more a year and covers 40 of the week's 168 hours — leaving evenings, weekends, and every busy stretch uncovered, which is often where B is highest. The other option is an AI receptionist that answers all 168 hours, books against your real calendar, and is honest about being an AI — it never pretends to be human, says so if asked, and doesn't record audio. Which one closes more of your A×B×C×D is a math question now, not a guess. And either way, the owner's goal is the same: make the decisions that matter and get your evenings back while the phone gets handled.
We're happy to sit with your five numbers and run this live — book a short call and bring your real data.
Do the A × B × C × D on your own phone, then check it against ours in fifteen minutes — book a call, or dial (626) 365-4946 first and hear Sofia answer; yes, it's an AI, and that's the point.