AI Receptionist Hub
Missed Call Calculator
Every unanswered ring can mean a lost booking or lead. Estimate the revenue impact of missed calls based on your industry, conversion rates, and average job value.
Free calculator · No signup
What could recovering missed calls be worth?
Estimate the opportunity, then subtract delivery and answering costs to see the potential net benefit.
Examples are editable starting points, not industry benchmarks. All amounts are GBP.
Your assumptions
Jump to results ↓1 is a typical year; 1.2 models 20% more calls throughout the period.
Exclude callers who already book via voicemail or another channel.
Only qualified sales or booking enquiries, not every call.
Accounts for cancellations and no-shows.
One completed sale, not lifetime customer value.
Revenue left after the variable cost of delivering the service.
Include subscription, usage, phone and integration fees.
Your estimate
Updates as you type- Net monthly benefit
- £464.39
- Additional revenue / month
- £1,105.65
- Contribution before answering fees
- £663.39
- First-year net benefit
- £5,572.68
- Extra bookings / month
- 8.2
- Extra completed sales / month
- 7.4
- Monthly ROI
- 233.4%
- Completed sales to break even / month
- 3
- Setup payback (months)
- 0
- Revenue opportunity / week
- £364.50
- Revenue opportunity / month
- £1,579.50
- Revenue opportunity / year
- £18,954.00
After delivery costs and answering fees
Net monthly benefit ÷ answering cost
How sensitive is the result?
Lower and higher scenarios vary the recovery rate or answer-rate improvement by 25%, bounded between 0% and 100% total coverage. Other assumptions stay fixed. These are scenarios, not confidence intervals.
How this is calculated
New completed sales = missed calls × sales-enquiry share × newly recovered share × booking rate × completion rate. Net benefit = recovered revenue × contribution margin − added answering cost. Monthly volumes use 52 ÷ 12 weeks; annual figures assume this scenario holds all year.
Revenue is not profit. Contribution deducts variable delivery costs; net benefit also deducts answering fees. First-year benefit deducts setup costs once. Fractional bookings represent expected averages. A zero service cost has no defined ROI; setup payback is not applicable when monthly benefit is zero or negative.
Estimates are illustrative, not guarantees. Annual estimates hold monthly assumptions constant. Calculations run in your browser; sharing puts the entered values in the link.
How it works
Step 1
Set your business metrics
Add missed calls per week, lead-to-customer rate, and average sale or appointment value.
Step 2
Adjust for seasonality
Model a higher or lower call-volume scenario with a multiplier, then set the share of sales enquiries you could newly recover.
Step 3
View lost revenue
See weekly, monthly, and annual estimates—and what capturing those calls could be worth.
Examples
- Salon losing 15 calls a week during lunch rush
- Plumber missing after-hours emergency requests
- Medical office with hold times that hang up
Frequently asked questions
How do I calculate missed call revenue?
Multiply missed calls by your answer-to-booking rate and average customer value. Even conservative assumptions often show meaningful annual loss.
What percentage of callers won't leave voicemail?
Studies vary by industry, but many callers move on to the next provider if no one answers—especially for urgent or comparison shopping calls.