"We miss a few calls" is the most expensive sentence in service business.
Every owner knows they miss some calls. Almost none of them know what each missed call actually costs. And the number is different for every vertical because the average ticket, the conversion rate, and the lifetime value are all different.
Here is the real cost of one missed call, broken out by vertical, with the math shown.
How to calculate the cost of a missed call
The formula is the same for every vertical:
Cost of one missed call = (Conversion rate if answered) x (Average first-visit value) x (Lifetime value multiplier)
Conversion rate: the percentage of answered calls that turn into a booked appointment or job. This varies by vertical, but for most service businesses it falls between 30 and 50 percent.
Average first-visit value: the revenue from the first appointment, treatment, or job. This is the immediate revenue at stake.
Lifetime value multiplier: how much additional revenue a customer generates over their relationship with you, beyond the first visit. For a one-time contractor job, this might be 1.2x. For a dental patient, it might be 5 to 10x.
Let us run the numbers for each vertical.
Dental practices
- Average missed-call rate: 18 to 19 percent during business hours
- Phone-to-booking conversion rate: 40 percent
- Average new-patient first-year value: $750
- Lifetime value multiplier: 5 to 8x (hygiene recalls, treatment plans, referrals over 5 to 10 years)
Cost of one missed call (first-year value only): 40% x $750 = $300
Cost of one missed call (lifetime value): 40% x $750 x 6 = $1,800
For a dental practice receiving 150 calls per month and missing 18 percent, that is 27 missed calls. At $300 per missed call (first year only), the monthly leak is $8,100. Annualized: $97,200.
The full lifetime value math is even worse: $1,800 x 27 = $48,600 per month in lifetime value walking out the door. But let us stay conservative and use first-year numbers.
For a deeper dive on dental missed-call math, see our full dental analysis.
Medspas
- Average missed-call rate: 50 percent during business hours
- Phone-to-booking conversion rate: 35 percent
- Average new-client first-visit value: $400
- Lifetime value multiplier: 4 to 6x (repeat treatments, add-ons, product purchases)
Cost of one missed call (first-visit value): 35% x $400 = $140
Cost of one missed call (lifetime value): 35% x $400 x 5 = $700
Medspas have a lower per-call cost than dental, but a much higher missed-call rate. A medspa receiving 120 calls per month and missing 50 percent loses 60 calls. At $140 per missed call: $8,400 per month. Annualized: $100,800.
The medspa missed-call problem is not about the per-call cost. It is about the volume. When half your calls go unanswered, the math gets ugly fast. One medspa recovered $853,000 in revenue by fixing this single gap. We covered that case in our medspa recovery post.
Physiotherapy clinics
- Average missed-call rate: 20 to 25 percent during business hours
- Phone-to-booking conversion rate: 45 percent
- Average treatment course value: $800 (8 sessions at $100)
- Lifetime value multiplier: 2 to 3x (re-injury, maintenance, referrals)
Cost of one missed call (treatment course value): 45% x $800 = $360
Cost of one missed call (lifetime value): 45% x $800 x 2.5 = $900
A physio clinic receiving 100 calls per month and missing 22 percent loses 22 calls. At $360 per missed call: $7,920 per month. Annualized: $95,040.
The physio number is compounded by the discharge problem: patients who complete treatment and need physio again within 12 months but never call back because nobody followed up. That is a separate $150,000 problem on top of the missed-call leak. We covered the discharge math in our physio discharge post.
Contractors (general, HVAC, plumbing, roofing, landscaping)
- Average missed-call rate: 35 to 45 percent (owner on jobsite, no dedicated phone person)
- Phone-to-quote conversion rate: 60 percent (callers who reach a human usually get a quote)
- Quote-to-close rate: 30 percent
- Average job value: $5,000
Cost of one missed call: 60% x 30% x $5,000 = $900
A contractor receiving 80 calls per month and missing 40 percent loses 32 calls. At $900 per missed call: $28,800 per month. Annualized: $345,600.
Contractors have the highest per-call cost of any vertical because their average job value is high and their missed-call rate is high. The structural problem is obvious: you cannot answer the phone when you are on a roof. But the financial impact is brutal.
Missed-call text-back recovers 40 to 60 percent of these calls within minutes. For a contractor missing 32 calls per month, recovering half means 16 re-engaged leads, 5 additional closed jobs, and $25,000 per month in recovered revenue.
Realtors
- Average missed-call rate: 30 to 35 percent (showing properties, in meetings, driving)
- Phone-to-appointment conversion rate: 25 percent (lower because many calls are tire-kickers)
- Average commission: $15,000 (on a $500,000 transaction at 3 percent)
- Close rate on appointments: 20 percent
Cost of one missed call: 25% x 20% x $15,000 = $750
A realtor receiving 40 calls per month and missing 32 percent loses 13 calls. At $750 per missed call: $9,750 per month. Annualized: $117,000.
The realtor number looks high, but remember that each closed deal is a $15,000 commission. You only need to recover 1 to 2 missed calls per month that convert to a closed deal to justify any phone system investment.
The compounding factor for realtors is referrals. A client you serve well refers 2 to 3 people over the next 5 years. A missed call means you never get the client, never serve them, and never get the referrals. The true lifetime cost of a missed realtor call is closer to $2,000 to $3,000.
The pattern across verticals
| Vertical | Missed-call rate | Cost per missed call | Monthly leak (typical) | Annual leak | |---|---|---|---|---| | Dental | 18-19% | $300 | $8,100 | $97,200 | | Medspa | 50% | $140 | $8,400 | $100,800 | | Physio | 22% | $360 | $7,920 | $95,040 | | Contractors | 40% | $900 | $28,800 | $345,600 | | Realtors | 32% | $750 | $9,750 | $117,000 |
Two things stand out:
1. Every vertical leaks $95,000+ per year on missed calls alone. This is not a rounding error. This is a full salary (or two) walking out the door because the phone rang at the wrong time.
2. Contractors have the worst problem by a wide margin. The combination of high job value and high missed-call rate creates a leak that is 3x larger than any other vertical. If you are a contractor reading this and you do not have call coverage, this is the single highest-ROI problem to fix in your business.
The 60-second test
You can calculate your own number right now:
- Pull your call log for last month (your phone system or provider has this)
- Count total inbound calls
- Count unanswered calls
- Divide unanswered by total = your missed-call rate
- Multiply unanswered calls by the per-call cost for your vertical (from the table above)
That is your monthly revenue leak from missed calls.
If you want to skip the manual work, the missed-call calculator does this in 60 seconds with your actual numbers.
What to do next
The fix for every vertical is the same: an AI phone agent that answers every call on the first ring, 24/7, and either books the appointment, captures the lead, or routes the call to the right person.
The cost of a phone agent is a fraction of the revenue it recovers. For most service businesses, the ROI is 10 to 20x within the first 90 days.
The $500 Revenue Audit shows you your exact missed-call number using your actual call logs. Not an industry average. Your number. 7-day turnaround, PDF report, 30-minute review call. Whether or not you hire us.
The calls are already coming in. The only question is whether they reach a human (or an agent that acts like one) or a voicemail that the caller will never listen to.