# Missed Call Math Machine-readable site catalog: https://missedcallmath.com/index.md > Missed Call Math is a KaiCalls content hub about what unanswered calls actually cost a local service business — a free missed-call revenue calculator plus a fully-sourced statistics hub and per-trade breakdowns. KaiCalls is an AI answering service for local service businesses: it answers missed calls on the first ring 24/7, qualifies the lead, books the appointment, and texts the owner the handoff. $69.99/month. Demo line at kaicalls.com. ## Pages - [Missed Call Math calculator](https://missedcallmath.com/): Free interactive calculator that turns your missed calls per week, close rate, and average job value into a daily, monthly, and annual revenue-loss figure. - [State of Missed Calls 2026](https://missedcallmath.com/stats/): The citable data hub — every missed-call statistic with source, methodology, and caveats, plus the widely-quoted stats we refused to include. - [Answering Service for Plumbers](https://missedcallmath.com/for/plumbers/): The missed-call math for plumbers — burst-pipe calls at 11:47pm, water heater installs, and what one saved $350-750 service call is worth. - [Answering Service for HVAC](https://missedcallmath.com/for/hvac/): The missed-call math for HVAC shops — heat-wave surges, no-heat calls, and why the job goes to whoever picks up first. - [Answering Service for Electricians](https://missedcallmath.com/for/electricians/): The missed-call math for electricians — hands inside a live panel, burning-smell calls, and the callback that never connects. ## Sources used on this site - 411 Locals 2024 real-call study (85 businesses, 58 industries): 37.8% of small-business calls answered live, 37.8% to voicemail, 24.3% no answer at all. - Hiya State of the Call: ~80% of callers who reach voicemail hang up without a message. - TransUnion/Toluna survey (1,556 US adults, Aug 2024): 74% of consumers won't answer calls from unknown numbers. - MIT/InsideSales.com via HBR: responding within 5 minutes made companies 21x more likely to qualify a lead (web-form leads, not phone). - YouGov 2024: phone is the #1 preferred channel for contacting a local business (35%). - BIA/Kelsey: phone leads convert roughly 10-15x better than web leads. - US Census 2022 Nonemployer Statistics: 2.88 million US construction businesses have zero paid employees.