How much are missed calls costing you?
To estimate the cost of missed calls, multiply your weekly inbound calls by the share that go unanswered, the share of those callers who go to a competitor, your close rate and your average job value, then multiply by 52. Pick your industry below to start from sourced defaults, then adjust every number to match your business.
Updated · Ventix AI Team
- Unanswered calls a month
- 65
- Customers lost a month
- 16.3
An AI receptionist answers every one of those calls, day or night.
How the missed call cost is calculated
Lost revenue per year = calls per week × % unanswered × % of missed callers who go elsewhere × close rate × average value × 52 weeks.
It's deliberately conservative. It ignores repeat business, referrals and lifetime value, and it assumes half of the people who reach voicemail try again with you later. Your real number is probably higher.
Where the defaults come from
Every default is either from a published source or marked as an assumption. Change any of them to match your business.
| Input | Default | Basis |
|---|---|---|
| Calls unanswered | 30% (law firms 50%) | Invoca's 2026 benchmark of 70M+ calls found only 56% of calls to businesses are answered by a person, rising to 71% for calls over 30 seconds. Clio's 2024 secret-shopper study found law firms answered 40% of calls. |
| Missed callers lost | 50% (assumption) | No credible study measures this directly. Invoca has reported that very few callers leave voicemail, so 50% is a cautious middle ground. |
| Close rate | 50% (assumption) | Varies widely by trade and lead source. Use your own. |
| Calls per week | 50 (30 for sales-led firms) | Assumption. Use your phone system's call log. |
| HVAC job value | $350 | Angi average HVAC repair cost |
| Plumbing job value | $338 | Angi average plumbing repair cost (2025 data) |
| Roofing job value | $4,699 | Verisk average roof repair insurance claim, 2025, as reported by Insurance Journal (June 2026). Retail repairs are often smaller. |
| Dental patient value | $887 a year | AHRQ MEPS: mean annual dental spend per person with a dental visit, 2021 |
| Law, medical, real estate, insurance, financial | No default | We couldn't find a reliable industry average, so enter your own fee, commission or patient value. |
Sources: Invoca Lead Conversion Benchmarks Report 2026; AHRQ MEPS Statistical Brief #555
How to stop losing revenue to missed calls
- Measure first: pull a month of call logs and count unanswered calls by hour. Most businesses find the gaps cluster at lunch, after 5 PM and on weekends.
- Call back fast: a missed call returned within minutes often still converts; the same call returned tomorrow usually doesn't.
- Cover the gaps: route overflow and after-hours calls to an answering service or an AI receptionist instead of voicemail.
- Book on the call: a message is not a booking. The fix that recovers revenue is one that schedules the job while the caller is still on the line.
Frequently asked questions
How much do missed calls cost a small business?
+
It depends on call volume and job value. For an HVAC company with 50 calls a week, 30% unanswered, half of those callers lost and a 50% close rate at a $350 average job, the estimate is about $68,000 a year. Use the calculator with your own numbers.
What percentage of business calls go unanswered?
+
Invoca's 2026 analysis of more than 70 million calls found that only 56% of calls to businesses are answered by a person. Law firms do worse: Clio's 2024 secret-shopper study found firms answered 40% of calls.
Do callers leave a voicemail?
+
Mostly not. Industry call data shows only a small share of callers leave a message when they reach voicemail. Most hang up and try another business, especially for urgent or local services.
How do I reduce missed calls?
+
Find when calls go unanswered, then cover those hours: add staff at peak times, use an answering service, or put an AI receptionist on overflow and after-hours calls so every call is answered and booked.
Keep exploring
Answer every call you're paying to generate
Book a free 30-minute call. We'll scope your agent, place a live AI call during the session, and quote a setup fee and monthly rate for your call volume.