Phone system logs
Most business phone systems and carrier portals list missed or unanswered calls. Export one or two normal weeks and remove duplicate calls from the same number.
Free tool / For service businesses and clinics
What are missed calls costing you?
See the yearly number.
Pick your industry for sourced starting values, then swap in your own call numbers. You get a live yearly-loss figure, an 'answer 80% of them' scenario and a link you can share with a partner or your team.
Run your numbersCalculator
Revenue at risk
from missed calls.
Every default shows its source, or says it is our estimate. Replace each one with numbers from your own phone records for the most useful result.
Estimated revenue at risk from missed calls
$33,170a year
$2,764 a month · about 94.8 repair calls a year
You would keep$26,536about 75.8 repair calls a year
Still at risk$6,634a year
Assumes an answered caller books at your usual rate of 50%.
How this is worked out
- 60 calls a week × 27% missed × 52 ÷ 1270.2 a month
- × 45% new customers31.6
- × 50% who never reach you again15.8
- × 50% you would normally book7.9 repair calls
- × $350 average first job$2,764 / month
- × 12 months$33,170 / year
- × 80% answered (scenario)$26,536 kept
The link holds only these numbers, with no name, email or business details.
Email me a PDF of this estimate
Close the gap
Find out where your calls slip.
The $249 Website & Lead-Flow Audit tests how a call or form actually reaches you, including after hours, and gives you a ranked list of fixes. Or bring these numbers to a free 20-minute call about a Tether pilot.
An estimate from the numbers above. It is not a forecast or a promise that any revenue can be recovered. Your figures stay in this browser unless you copy the link.
By industry
Worked examples
for your trade.
Each page runs the numbers for one industry with its own defaults, sources and notes on what to change.
Tether / Sample conversation
See how Tether
would answer your call.
A sample conversation, written by us, showing how Tether, the MoxiSync AI receptionist, could handle a call you would otherwise miss and what your team would receive. It is not a recording or a live agent. Tether is offered through guided pilots that are scoped and tested with each business.
Sample conversationWritten by MoxiSync to show how Tether could handle this call. Not a recording, and not a real caller.
Tuesday, 7:40 pm · the office is closed
- Tether · AI receptionist
Thanks for calling. The team is out on jobs right now, so I'm taking calls for them. How can I help?
- Caller
Our air conditioning stopped blowing cold this afternoon. It's really hot upstairs.
- Tether · AI receptionist
Sorry to hear that. Is this your home or a business, and is anyone at the property who's vulnerable to the heat?
- Caller
It's our home. My mom lives with us and she's eighty-two.
- Tether · AI receptionist
Thank you. I'm marking this as urgent and passing it to the on-call technician now. Can I confirm the best number to reach you?
Tether: Thank you. I'm marking this as urgent and passing it to the on-call technician now. Can I confirm the best number to reach you? Outcome: Urgent callback sent to the on-call tech: AC not cooling
OutcomeUrgent callback sent to the on-call tech: AC not cooling
- Urgent
- No cooling
- Elderly occupant
- Callback number confirmed
- Sent to on-call tech
Sample call with AI voices, not a real customer.
Before you trust the number
How to count your
missed calls.
A week or two of real records beats any estimate. These sources are usually already available to you.
Voicemail
Count voicemails left, then remember that many callers hang up without leaving one. Voicemail alone usually undercounts missed calls.
Call tracking
If you use tracking numbers for ads or your website, their reports show missed calls by source and time of day, including after hours.
Sort the callers
Mark each missed number as new enquiry, existing customer or other. That gives you your own percentage instead of a guess.
What to do next
Ways to recover
missed calls.
Start with the simplest fix that closes the gap. Results depend on your callers and your follow-up; none of these guarantees recovered work.
Callback rules
Agree who returns missed calls, how quickly, and how a returned call is marked done, so nothing depends on memory.
Missed-call text-back
An automatic text after a missed call lets the caller reply with their request instead of trying the next business.
Website click-to-call and forms
Make the phone number tappable on mobile and give people a short form when calling is not convenient for them.
After-hours handling
Decide what happens at night and at weekends: urgent calls to an on-call person, routine requests captured for the morning.
$249 / Website & Lead-Flow Audit
Find where calls and forms slip
A recorded video audit of your website and enquiry path, including how calls reach you after hours, with a ranked list of fixes. Delivered in 3 business days and credited toward a Website Sprint.
See what the audit coversWhere the defaults come from
Sources and
estimates.
We picked the conservative end of every range. Most published missed-call figures come from companies that sell answering services, so we say when a number is one of those, or our own estimate.
| Default | Value | Basis |
|---|---|---|
| HVAC: Calls a week | 60 a week | MoxiSync estimate. Example volume of 60 inbound calls a week for a small, owner-led business. Replace it with your own phone log. |
| HVAC: Missed-call rate | 27% | Invoca (2022), as cited by The Open University's OpenLearn Create. Around 27% of calls to home-service companies go unanswered. Vendor-sourced; we use it as stated rather than the higher 62% figure often repeated online. |
| HVAC: New-customer share | 45% | MoxiSync estimate. Under half of missed calls are new customers; the rest are existing customers, suppliers and sales calls. |
| HVAC: Never call back | 50% | MoxiSync estimate. Half of missed new callers never reach you again. Lower than the ~85% 'don't call back after voicemail' figure attributed to Dialzara (2023), because we could not verify that study. |
| HVAC: Booking rate | 50% | MoxiSync estimate. Half of new repair enquiries you speak to become a booked job. |
| HVAC: Average first job | $350 | Angi / HomeAdvisor HVAC repair cost guide (2025 data). National average HVAC repair of about $350 (typical range $100–$3,000). Uses a repair, not a system replacement, so it stays conservative. |
| Plumbing: Calls a week | 50 a week | MoxiSync estimate. Example volume of 50 inbound calls a week for a small, owner-led business. Replace it with your own phone log. |
| Plumbing: Missed-call rate | 27% | Invoca (2022), as cited by The Open University's OpenLearn Create. Around 27% of calls to home-service companies go unanswered. Vendor-sourced; we use it as stated rather than the higher 62% figure often repeated online. |
| Plumbing: New-customer share | 45% | MoxiSync estimate. Under half of missed calls are new customers. |
| Plumbing: Never call back | 50% | MoxiSync estimate. Half of missed new callers never reach you again. Lower than the ~85% 'don't call back after voicemail' figure attributed to Dialzara (2023), because we could not verify that study. |
| Plumbing: Booking rate | 50% | MoxiSync estimate. Half of new repair enquiries become a booked job. |
| Plumbing: Average first job | $341 | Angi plumber cost guide (2026 data). National average plumbing repair of about $341, from roughly 94,000 verified projects (most pay $182–$501). |
| Roofing: Calls a week | 30 a week | MoxiSync estimate. Example volume of 30 inbound calls a week for a small, owner-led business. Replace it with your own phone log. |
| Roofing: Missed-call rate | 27% | Invoca (2022), as cited by The Open University's OpenLearn Create. Around 27% of calls to home-service companies go unanswered. Vendor-sourced; we use it as stated rather than the higher 62% figure often repeated online. |
| Roofing: New-customer share | 50% | MoxiSync estimate. Half of missed roofing calls are new enquiries: roofers see fewer repeat callers than HVAC or plumbing. |
| Roofing: Never call back | 50% | MoxiSync estimate. Half of missed new callers never reach you again. Lower than the ~85% 'don't call back after voicemail' figure attributed to Dialzara (2023), because we could not verify that study. |
| Roofing: Booking rate | 30% | MoxiSync estimate. Three in ten enquiries become a signed job, because most roofing calls start as a quote request. |
| Roofing: Average first job | $1,155 | Angi roof repair cost guide (2025 data). Average roof repair of about $1,155 (typical range $393–$1,934). A repair, not a replacement, so it stays conservative. |
| Electrical: Calls a week | 40 a week | MoxiSync estimate. Example volume of 40 inbound calls a week for a small, owner-led business. Replace it with your own phone log. |
| Electrical: Missed-call rate | 27% | Invoca (2022), as cited by The Open University's OpenLearn Create. Around 27% of calls to home-service companies go unanswered. Vendor-sourced; we use it as stated rather than the higher 62% figure often repeated online. |
| Electrical: New-customer share | 45% | MoxiSync estimate. Under half of missed calls are new customers. |
| Electrical: Never call back | 50% | MoxiSync estimate. Half of missed new callers never reach you again. Lower than the ~85% 'don't call back after voicemail' figure attributed to Dialzara (2023), because we could not verify that study. |
| Electrical: Booking rate | 45% | MoxiSync estimate. Just under half of new service enquiries become a booked job. |
| Electrical: Average first job | $350 | Angi / HomeAdvisor electrician cost guide (2025 data). Average cost of about $350 for an electrician to visit and complete repairs (typical range $163–$538). |
| Dental: Calls a week | 120 a week | MoxiSync estimate. Example volume of 120 inbound calls a week for a small, owner-led business. Replace it with your own phone log. |
| Dental: Missed-call rate | 30% | Dental Economics, "The economics of missed calls". Cites 30–38% of calls going unanswered during business hours. We use the low end. |
| Dental: New-customer share | 35% | MoxiSync estimate. Published figures for the new-patient share of missed calls range from about 30% (vendor data) to 60–65% (Dental Economics). We use 35%, near the low end. |
| Dental: Never call back | 50% | MoxiSync estimate. Half of missed new callers never reach you again. Lower than the ~85% 'don't call back after voicemail' figure attributed to Dialzara (2023), because we could not verify that study. |
| Dental: Booking rate | 60% | MoxiSync estimate. Six in ten new-patient callers you speak to book a first visit. |
| Dental: Average first job | $850 | MoxiSync estimate. First-year value of a new patient is commonly cited at $850–$1,300 in dental practice-management sources. We use the low end and ignore lifetime value. |
| Med spa: Calls a week | 80 a week | MoxiSync estimate. Example volume of 80 inbound calls a week for a small, owner-led business. Replace it with your own phone log. |
| Med spa: Missed-call rate | 25% | MoxiSync estimate. We found no independent study of med spa missed-call rates; vendor blogs assume 28–41% without sources. We use 25%. |
| Med spa: New-customer share | 40% | MoxiSync estimate. Four in ten missed calls are new clients; the rest are rebookings and existing clients. |
| Med spa: Never call back | 50% | MoxiSync estimate. Half of missed new callers never reach you again. Lower than the ~85% 'don't call back after voicemail' figure attributed to Dialzara (2023), because we could not verify that study. |
| Med spa: Booking rate | 40% | MoxiSync estimate. Four in ten new enquiries book a first treatment, since many start with a price question. |
| Med spa: Average first job | $435 | American Society of Plastic Surgeons, neurotoxin cost statistics. Average fee of $435 for a neurotoxin (Botox-type) treatment, the most common med spa service. Uses one treatment, not a client's yearly spend. |
Common questions
About the
calculator.
How do you calculate the cost of missed calls?
Weekly calls × the share you miss gives missed calls. Multiply by the share who are new customers, the share who never call back, and your booking rate to get lost jobs. Multiply by your average first-job value for lost revenue, then by 12 for a year.
Are the industry defaults real statistics?
Some are. Job values come from Angi, HomeAdvisor and ASPS cost data, and missed-call rates from Invoca and Dental Economics. Others, like booking rates, are our own conservative estimates and are labelled that way. Your own phone log will always beat a default.
What does 'answer 80% of them' mean?
It is a what-if. It shows how much of the yearly loss you would keep if 80% of the calls you miss today reached someone and booked at your usual rate. Move the slider to try other answer rates.
Is my data stored?
Only if you ask for an emailed summary. The calculator runs in your browser, and a copied share link contains only the numbers you entered. If you request a summary by email, we save your email address and those numbers so we can send it.
For partners and directories
Embed this
calculator.
Free to embed on a trade association, directory or partner site. Change i=hvac to plumbing, roofing, electrical, dental or med-spa. It sends us nothing your visitors type and carries a "Powered by MoxiSync" link.
<iframe src="https://moxisync.com/embed/missed-call-calculator?i=hvac" title="Missed call cost calculator by MoxiSync" width="100%" height="1400" style="border:0;max-width:1100px" loading="lazy"></iframe>Learn more
Related guides.
This calculator produces an estimate from the figures you enter. It does not predict how much revenue any service would recover.
Want a second look at your numbers?
Bring your missed-call count to a free 20-minute call. We will talk through where calls slip and whether a Tether pilot fits.