Free calculator

Missed Call Revenue Calculator

A focused look at the economics of unanswered calls. Enter your call volume and your own conversion assumptions, and the calculator walks them down a funnel to an estimate of the revenue potentially at risk each month. Every step is an assumption you can change.

Last updated: August 2026

Your inputs

%

Filters out spam, vendors, wrong numbers and repeat dials.

%
%
$

Estimated results

Missed calls per month40
Potential qualified opportunities missed16
Potential customers missed4.8
Potential monthly revenue at risk$2,400
Potential annual revenue at risk$28,800

Disclaimer: these are estimates produced from the assumptions you entered — not a claim about revenue your business has actually lost. Attribution is genuinely difficult: not every missed call is a real sales opportunity, and some callers reach you later by another channel.

Shareable summary

Missed Call Revenue Calculator (28thDeveloper, updated August 2026) Inputs: 200 inbound calls/month, 20% missed, 40% qualified, 30% close rate, $500 average value. Modelled result: 40 missed calls, 4.8 potential customers, $2,400 potential monthly revenue at risk ($28,800/year). These figures are modelled estimates from user-entered assumptions, not measured losses. Source: https://www.28thdeveloper.com/resources/missed-call-revenue-calculator

Want to stop losing those calls?

See how a 24/7 AI receptionist answers, qualifies, and books from the number you already use — then compare it against the figure above.

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Related: Houston virtual receptionist · After-hours coverage · AI receptionist ROI calculator

The funnel, step by step

  1. Inbound calls

    200

  2. Missed calls

    40

  3. Potential qualified opportunities

    16

  4. Potential customers

    4.8

  5. Potential revenue at risk

    $2,400

Each stage multiplies the one above it by the percentage you entered. Nothing is hidden: missed calls = calls × missed %, opportunities = missed calls × qualified %, customers = opportunities × close rate, revenue at risk = customers × average value, and the annual figure is that monthly number × 12.

Why missed calls matter for service businesses

  • Callers often contact several businesses. When someone needs a plumber or an attorney today, your number is usually one of a few they try.
  • Response speed can affect whether a lead becomes a conversation. A call answered live keeps the conversation going; a voicemail depends on the caller waiting.
  • After-hours calls are hard for small teams. Evenings, weekends, and the middle of a job are exactly when nobody is free to pick up.
  • Not every missed call is lost revenue. Spam, vendors, existing customers, and duplicate dials all show up in the same missed-call count.
  • Measure before you assume a recovery rate. Listen back to a month of unanswered calls and categorise them. That gives you defensible inputs for this model instead of borrowed averages.

Related tools and reading

Once you know your revenue at risk, compare it against the cost of coverage with the AI receptionist ROI calculator. If your gap is mostly evenings and weekends, our after-hours virtual receptionist page covers how that coverage works, and Houston virtual receptionist explains local call handling for Houston-area businesses.

Frequently asked questions

Want your calls answered instead of estimated?

See how an AI receptionist answers, qualifies, and books from your existing number.

See demo(713) 568-5120

Cite this resource

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Missed Call Revenue Calculator — 28thDeveloper — https://www.28thdeveloper.com/resources/missed-call-revenue-calculator