Guide · 8 min
What Does a Missed Call Really Cost? The Complete Math
25 to 30% of a service business's calls go unanswered. Here's the exact formula to compute what it costs you monthly — and what recovering them is worth.
The starting stat: one call in four
Service businesses miss 25–30% of their incoming calls during business hours — and 100% after hours. The cause isn't indifference: it's a plumber under a sink, a stylist mid-cut, a shop on a lift. The phone rings exactly when hands are busy.
The stat that makes it worse: fewer than 3% of callers leave a voicemail. The rest don't call back either — they call your competitor. The decision window is 5 to 10 minutes: past that, the job is gone.
The formula
Monthly cost = (missed calls/month) × (conversion rate) × (average job value). A plumber with 25 missed calls, 30% conversion and a $350 ticket loses: 25 × 0.30 × 350 = $2,625 per month. That's $31,500 a year — for not picking up.
Conversion rate depends on the trade: 20–35% for emergencies (plumbing, locksmithing, glazing), lower for considered quote requests. Take the lowest: if the math still hurts, the problem is real.
Three worked examples
Auto shop: 20 missed calls × 30% × $540 = $3,240/month. Hair salon: 18 calls × 30% × $85 = $459/month — but avoided no-shows and filled slots often double the real impact. Law firm: 12 calls × 25% × $1,200 = $3,600/month, not counting the lifetime value of a recurring matter.
These figures are estimates — yours depend on your real traffic. That's exactly what our calculator is for: four sliders, one verdict. The average result shown: $1,871 in recoverable revenue per month.
And the reverse cost: what recovery costs
A human answering service bills $300–6,899/month by volume, with extra minutes at $1.49–2.99. A DIY text-back setup means configuring, monitoring and answering yourself — a founder's time. In between: Harch Signal at $149/month, done-for-you.
The honest math: recover just one average job per month and the service pays for itself. Everything else is margin found again — on calls that already rang into the void yesterday.
FAQ
Questions we get
Are the 25–30% statistics reliable?
These are consolidated orders of magnitude from public 2026 sources (industry studies and carrier data). Your exact rate depends on your activity — measure it for a week with your call log, then run the formula.
What if my conversion rate is lower?
Lower the rate in the formula and look at the result: even at 15%, a plumber recovers $1,300/month on 25 missed calls. The $149 service stays profitable at very low rates.
Answered in under 10 seconds
Your next missed call can be the last one.
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