How Much Does a Missed Call Cost a Small Business? A Calculator and 2026 Numbers by Industry
Every small business misses calls. The question is what each one actually costs, and the honest answer is "it depends on four numbers, and most owners have never measured any of them."
This page gives you the formula, the sourced defaults for six industries, and a calculator that does the arithmetic on your own inputs. It also explains the part most missed-call articles skip: why a missed call is a lost call rather than a delayed one.
The formula
The cost of missed calls over a month is:
Calls missed × share that were new customers × your close rate × average job value
That's it. Four inputs. The calculator below runs it live; the rest of this page tells you where each number comes from so you can defend the result to yourself.
Your numbers
Emergency plumbing runs $150–$500 per visit (Today's Homeowner).
Measured miss rates run 20–35%.
Deliberately below every benchmark in the article, so the result understates rather than overstates.
Lost revenue per month
$3,003
$36,036 a year · 52.0 missed calls → 8.6 lost jobs a month
One recovered job pays for
1.8 mo
of the $199 plan
Net monthly gain
+$2,804
if every one of those calls were answered
Net gain is the illustrative upper bound: lost revenue minus the plan price, assuming the AI recovers every lost job.
Assumptions: your inputs above. Defaults are sourced in the article; this is an illustration, not a measurement.
The defaults, worked out
| Industry preset | Calls/week | Missed % | New-customer % | Close % | Job value | Lost revenue / month | Lost revenue / year |
|---|---|---|---|---|---|---|---|
| Plumbing | 40 | 30 | 50 | 33 | $350 | ~$3,000 | ~$36,000 |
| HVAC (repair) | 60 | 30 | 50 | 33 | $375 | ~$4,800 | ~$58,000 |
| Roofing | 25 | 30 | 60 | 25 | $10,000 | ~$48,000 | ~$580,000 |
| Dental (new patients, first year) | 27/mo new-patient calls | 30 | 100 | 33 | $600 | ~$2,400 | ~$29,000 |
| Electrical | 30 | 30 | 50 | 33 | $250 | ~$1,600 | ~$19,000 |
Figures are calculated from the defaults and sources above; they are illustrations, not measurements.
Input 1: how many calls you actually miss
Most owners guess low, because a missed call leaves no record in anyone's memory. The measured figures are consistently in the 20–35% range during business hours:
| Industry | Measured miss rate | Source |
|---|---|---|
| Dental practices | 20–30% or more (call-tracking data); 28–32% (USA Dental Report) | Scheduling Institute · Resonate |
| Law firms | 34.8% of 1,200 audited calls unanswered, placed 10 AM–4 PM on business days | Legal Navigator, 2026 study |
| HVAC | 30% or more in peak season; 30–50% during the first heat wave (vendor call data) | KaiCalls |
If you have no data of your own, 30% is a defensible default. If you want the real number, pull the call log from your phone system for one week and count rings that ended in voicemail or a hang-up. It takes twenty minutes and it is usually the most expensive twenty minutes of the year.
Input 2: how many of those were new customers
Existing customers call back. New ones don't. So this input matters more than it looks.
In dentistry, Scheduling Institute cites industry research that 98% of new patients phone the office before their first visit, and Group Dentistry Now data (via Resonate) puts 65% of missed calls as potential new patients. In home services the share is usually lower, because a good chunk of inbound is existing customers, suppliers and scheduling changes. 50% is a reasonable default for a service business; move it up for practices, down for businesses with a large repeat base.
Input 3: your close rate on answered calls
This is the one number most owners do know. If you don't, the benchmark KaiCalls cites from ServiceTitan's 2024 data for HVAC is 65–75% of answered calls convert to booked jobs. Dental practices typically convert new-patient calls at a lower rate because callers are shopping. The calculator defaults to a conservative 33%, which is deliberately below every benchmark above, so the result understates rather than overstates.
Input 4: what one job is worth
Use the ticket for the kind of call you miss, not your average across everything. Sourced figures:
| Industry | Typical job value | Source |
|---|---|---|
| Emergency plumbing | $150–$500 per visit; burst or frozen pipe $500–$1,500; nights 1.5×, weekends 2×, holidays 3× | Today's Homeowner, 2025 |
| HVAC repair | $375 average ($250–$700); emergency calls at 2–3× the normal hourly rate | Fixr, 2026 |
| HVAC replacement | $5,000–$12,000 (ServiceTitan 2024 benchmarks, as cited) | KaiCalls |
| Electrical service call | $176–$327 per visit; $70–$131 per hour; premiums for after-hours emergencies | Fixr, 2025 |
| Roof replacement | $10,000 average ($7,500–$14,000) | Fixr, 2026 |
| New dental patient | $500–$700 first year; at least $4,500 cumulative production over 7–10 years | PatientXpress · Scheduling Institute |
Notice that the calls you are most likely to miss, the after-hours and emergency ones, are also the highest-ticket ones. Missed calls are not a random sample of your calls. They are skewed toward the expensive ones.
Three worked examples
These use the defaults above. They are illustrations, not measurements of your business.
A two-truck plumbing company taking 40 calls a week. At a 30% miss rate that is 12 missed calls a week, about 52 a month. Half were new customers (26). A third of those would have booked (about 9). At a conservative $350 average ticket, that is roughly $3,000 a month, or $36,000 a year, before a single burst-pipe job at 2× weekend rates.
A single-dentist practice at the national average of 27 new-patient calls a month (Scheduling Institute). A 30% miss rate means roughly 12 more new-patient calls it never heard. A third would have booked: four new patients a month. At $500–$700 first-year revenue that is $24,000–$34,000 a year in first-year revenue, and about $216,000 in cumulative production at the $4,500 figure.
A roofing company missing just four calls a week during storm season. One in four would have booked an inspection, one in two inspections closes. That is two replacement jobs a month at a $10,000 average: about $20,000 a month that rang and went unanswered.
If any of those feel high, lower the close rate in the calculator until it feels honest. It rarely gets down to the price of fixing it.
Why a missed call is a lost call, not a delayed one
The instinct that saves owners from the number above is "they'll leave a message and we'll call back." The evidence says they won't, and that the callback rarely connects.
- They don't leave a message. The most-cited figure, attributed to Forbes in CRM Magazine's analysis of business voicemail: 80% of callers sent to voicemail do not leave a message. A live-answering CEO quoted in the same piece puts abandonment at 50–75% depending on the business. (CRM Magazine) In dentistry the USA Dental Report figure is that only 14% of new patients leave one. (Resonate)
- They decide before you call back. BrightLocal's 2026 survey of 1,227 US consumers found 75% choose a local business within 30 minutes and 72% consider three or fewer businesses. (BrightLocal) The caller who got your voicemail at 10:15 had usually booked one of the other two by 10:45.
- Your callback goes unanswered. Hiya's 2026 State of the Call, from 12,000+ consumers, found 86% of calls from unknown numbers go unanswered. (Hiya) Your cell is an unknown number.
- And callbacks are slower than you think. The Harvard Business Review audit of 2,241 companies found only 37% responded to a lead within an hour, 23% never responded, and the average was 42 hours. (HBR, 2011)
Put those together and the "delayed" call is a lost call roughly four times out of five. We go deeper on the voicemail behaviour in Why Customers Don't Leave Voicemails Anymore.
The second cost, if you run ads
If any of your calls come from Google Ads or Local Services Ads, a missed call costs you twice. You paid for the lead, and Google's own Local Services documentation says "missed calls may negatively affect your responsiveness," which is a ranking input. (Google Local Services Help) The full breakdown is in You're Paying for Calls Nobody Answers.
What to do with the number
Once you have a monthly figure, the decision is short. Set it next to what each fix costs:
| Option | Answers the call now? | Covers overflow (two calls at once)? | Covers after hours? | Cost |
|---|---|---|---|---|
| Ring the owner's cell | Sometimes | No | Sometimes, at the owner's expense | Sleep and focus |
| Hire or add front-desk staff | During shifts, one call at a time | No | No | Salary plus taxes and benefits |
| Live answering service | If they pick up in time | Yes | Yes, usually at a premium | Per minute or per call; scales with volume |
| AI phone receptionist | Every call, first ring | Yes, unlimited simultaneous calls | Yes | Flat rate. After Hours CallBot: $199–$499/mo, $0.12/min beyond included time |
After Hours CallBot answers on the first ring, books into Google Calendar, Calendly or TidyCal during the call, transfers emergencies on keywords you set, and texts you a summary after every call. The full payback math, including the cases where it is not worth it, is in Is an AI Receptionist Worth It?. Industry setups: plumbing, HVAC, roofing, dental, electrical, law firms.
You can hear it take a call right now: (321) 504-5467. Or start a 14-day free trial, forward your line, and count the jobs.
Frequently asked questions
- How much does a missed call cost a small business?
- Missed calls per month × share that were new customers × close rate × average job value. For a service business missing 30% of 40 weekly calls at a $350 ticket, that is roughly $3,000 a month. High-ticket trades like roofing and HVAC replacement run far higher per call.
- What percentage of business calls go unanswered?
- Measured figures cluster between 20% and 35% during business hours: 20–32% for dental practices, 34.8% in a 1,200-call audit of law firms, and 30% or more for HVAC in peak season.
- Do customers call back if you miss their call?
- Usually not. About 80% of callers sent to voicemail leave no message, 75% of consumers choose a local business within 30 minutes, and 86% of callbacks from unknown numbers go unanswered.
- Is it cheaper to hire a receptionist or use an answering service?
- A receptionist covers one call at a time during their shift; a live service bills per minute or per call and rises with volume; an AI receptionist is a flat monthly rate and answers unlimited simultaneous calls. Which is cheaper depends on your call volume and ticket size; the calculator above shows the break-even.
- How do I find out how many calls my business misses?
- Export one week of your phone system's call log and count inbound calls that ended in voicemail, a hang-up before answer, or a busy signal. Divide by total inbound calls. Most owners find 20–35%.