Calculator User Guide
How to use the CallingCrew calculators, where the numbers come from and how to interpret them.
Getting started
Each calculator shows the difference between your current process and the projected position with CallingCrew. The figures update live as you move the sliders or type values.
- Choose your currency (GBP, EUR or USD) using the selector at the top of each calculator.
- Replace the example starting values with your own business data.
- Click or tap the information icon beside any input for the default value, classification and source note.
- Click Reset to defaults to restore the original example values at any time.
Tips for realistic inputs
- Use recent monthly averages rather than peak or one-off figures.
- Average job value should reflect your typical installed-system or service order value, net of VAT where applicable.
- Gross margin should cover only the direct cost of delivery, not overheads.
- Current callback recovery, qualified-enquiry and conversion rates are your own estimates — these are the biggest drivers of the result.
- Platform cost defaults are example assumptions only. Replace them with the price agreed with CallingCrew.
Default-value table
Every default is classified as either an Example assumption supplied by CallingCrew or a Published benchmark from a named source. There are no unsupported industry averages.
| Calculator | Input | Default | Classification | Source / note |
|---|---|---|---|---|
| Time Saved | New enquiries per month | 30 | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Time Saved | Minutes qualifying each enquiry | 15 min | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Time Saved | Estimates prepared per month | 15 | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Time Saved | Minutes per estimate | 30 min | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Time Saved | Minutes to review each qualified enquiry | 5 min | Example assumption | Time the installer expects to spend checking the structured enquiry details supplied by CallingCrew. Replace with your own expected figure and later with measured pilot data. |
| Time Saved | Minutes to review each provisional estimate | 15 min | Example assumption | Time the installer expects to spend reviewing and finalising the provisional estimate prepared by CallingCrew. The installer retains final technical and commercial control. |
| Time Saved | Site visits per month | 10 | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Time Saved | Average travel and site minutes | 120 min | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Time Saved | Visits that could be avoided | 20% | Example assumption | Example assumption. Replace with your own figure. |
| Time Saved | Hourly value of installer time | £50 | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Missed-Call ROI | Missed calls per month | 30 | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Missed-Call ROI | Average job value | £8,000 | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Missed-Call ROI | Current callback recovery rate | 15% | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Missed-Call ROI | CallingCrew capture rate | 100% | Example assumption | Reflects correct routing of missed calls to the installer. Replace if you expect a different capture rate. |
| Missed-Call ROI | Qualified-enquiry rate | 35% | Example assumption | Example qualified-enquiry assumption, not an industry average. Replace with your own figure. |
| Missed-Call ROI | Job-conversion rate | 15% | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Missed-Call ROI | Average gross margin | 30% | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Missed-Call ROI | Monthly platform cost | £1,000 | Example assumption | Monthly managed service fee. Voice AI usage and call credits are charged separately. Replace with your agreed CallingCrew price. |
| Installer Revenue | New enquiries per month | 40 | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Installer Revenue | Missed calls per month | 30 | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Installer Revenue | Average job value | £8,000 | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Installer Revenue | New-enquiry conversion rate | 25% | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Installer Revenue | Current callback recovery rate | 15% | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Installer Revenue | CallingCrew capture rate | 100% | Example assumption | Reflects correct routing of missed calls. Replace if you expect a different capture rate. |
| Installer Revenue | Qualified-enquiry rate | 35% | Example assumption | Example assumption. Replace with your own figure. |
| Installer Revenue | Missed-call job-conversion rate | 15% | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Installer Revenue | Average gross margin | 30% | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Installer Revenue | Monthly platform cost | £1,000 | Example assumption | Monthly managed service fee. Voice AI usage and call credits are charged separately. Replace with your agreed CallingCrew price. |
| Supplier Network | Active installers | 32 | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Supplier Network | Average enquiry value | £18,000 | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Supplier Network | Missed calls per installer per month | 8 | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Supplier Network | Qualification improvement | 15% | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Supplier Network | Average gross margin | 30% | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Supplier Network | Annual platform cost | £72,000 | Example assumption | Example annual platform cost. Voice AI usage and call credits are charged separately. Replace with your agreed CallingCrew price. |
| Supplier Network Quick | Number of installers | 50 | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Supplier Network Quick | Average enquiries per installer / month | 10 | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Supplier Network Quick | Average system / order value | £18,000 | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Supplier Network Quick | Current conversion rate | 25% | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Supplier Network Quick | Expected conversion improvement | 10% | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Supplier Network Quick | Supplier gross margin | 30% | Example assumption | Replace with your own figure. CallingCrew calculator default. |
| Supplier Network Quick | CallingCrew annual platform cost | £72,000 | Example assumption | Example annual platform cost. Voice AI usage and call credits are charged separately. Replace with your agreed CallingCrew price. |
Understanding the results
Each calculator compares three positions:
- Current process: your baseline using the figures and rates you enter.
- With CallingCrew: the projected position using CallingCrew capture, routing and qualification.
- Difference attributable to CallingCrew: the incremental revenue, gross profit and net gain between the two.
Key metric definitions:
- Net gain: incremental gross profit after deducting the CallingCrew platform cost.
- ROI: net gain expressed as a percentage of the CallingCrew cost.
- Payback period (Missed-Call and Installer Revenue): the number of months required for the monthly CallingCrew cost to be recovered from the monthly incremental gross profit. No payback is shown when the monthly incremental gross profit is zero or negative.
- Annual platform cost recovery (Supplier Network): the number of months required for the annual CallingCrew cost to be recovered from the monthly With-CallingCrew gross profit.
Industry benchmarks and sources
The calculators do not currently rely on external published benchmarks for their defaults, because verified, representative figures for the UK wastewater installation sector are not publicly available.
All visible defaults are Example assumptions supplied by CallingCrew for illustration. You should replace them with your own records or estimates.
- Example assumption — a placeholder value supplied by CallingCrew for illustration.
- Published benchmark — a value derived from a named third-party source. When a source reports a range, the range is shown and the calculator default is explained.
Currency conversion values are sourced from a third-party service and cached locally. If the live service is unavailable, the calculators fall back to approximate rates. The primary reference is the European Central Bank euro reference exchange rates as a cross-check.
Calculation methods
Time Saved
What it measures: The net admin and site-visit time impact of having CallingCrew handle upfront qualification and provisional-estimate preparation before the installer reviews the output.
Key assumptions: Defaults are example assumptions for enquiry volume, current time spent per activity, review time for each qualified enquiry and provisional estimate, avoidable visits, and the hourly value of installer time. If review time equals current time, the saving is zero; if review time exceeds current time, the result is a negative (additional) time impact.
View calculation method
- Current qualification time (h/month) = New enquiries per month × Minutes currently spent qualifying each enquiry ÷ 60
- CallingCrew qualification review time (h/month) = New enquiries per month × Minutes to review each qualified enquiry ÷ 60
- Qualification time saved (h/month) = Current qualification time − CallingCrew qualification review time
- Current estimate-preparation time (h/month) = Estimates prepared per month × Minutes currently spent preparing each estimate ÷ 60
- CallingCrew estimate review time (h/month) = Estimates prepared per month × Minutes to review each provisional estimate ÷ 60
- Estimate time saved (h/month) = Current estimate-preparation time − CallingCrew estimate review time
- Total admin time saved (h/month) = Qualification time saved + Estimate time saved
- Site-visit time (h/month) = Site visits per month × Average travel and site minutes ÷ 60
- Avoidable site-visit time (h/month) = Site-visit time × Visits that could be avoided percentage ÷ 100
- Current hours = Current qualification time + Current estimate-preparation time + Site-visit time
- Hours remaining with CallingCrew = Current hours − Total admin time saved − Avoidable site-visit time
- Total potential time back (h/month) = Total admin time saved + Avoidable site-visit time
- Annual time back = Total potential time back × 12
- Net working days per year = Annual time back ÷ 8
- Current cost of time = Current hours × Hourly value of installer time
- Cost with CallingCrew = Hours remaining with CallingCrew × Hourly value of installer time
- Monthly value of time back = Total potential time back × Hourly value of installer time
- Annual value of time back = Monthly value × 12
Missed-Call ROI
What it measures: The revenue, gross profit, net gain and payback from capturing and converting missed calls that would otherwise be lost.
Key assumptions: Defaults are example assumptions for missed-call volume, job value, current callback recovery, CallingCrew capture rate (100% reflects correct routing), qualified-enquiry rate and job-conversion rate. The monthly platform cost is a managed service fee and excludes Voice AI usage and call credits, which are charged separately.
View calculation method
Core calculation: Missed calls per month × Capture rate × Qualified-enquiry rate × Job-conversion rate × Average job value, scaled to 12 months.
- Current process: calls recovered = Missed calls × Current callback recovery rate ÷ 100
- With CallingCrew: calls captured = Missed calls × CallingCrew capture rate ÷ 100
- Qualified enquiries = (recovered or captured calls) × Qualified-enquiry rate ÷ 100
- Converted jobs = Qualified enquiries × Job-conversion rate ÷ 100
- Estimated annual revenue = Converted jobs per month × Average job value × 12
- Estimated annual gross profit = Estimated annual revenue × Average gross margin ÷ 100
- Incremental revenue = With-CallingCrew revenue − Current-process revenue
- Incremental gross profit = With-CallingCrew gross profit − Current-process gross profit
- Annual CallingCrew cost = Monthly platform cost × 12
- Net incremental gain = Incremental gross profit − Annual CallingCrew cost
- ROI = Net incremental gain ÷ Annual CallingCrew cost × 100
- Monthly CallingCrew cost = Annual CallingCrew cost ÷ 12
- Monthly incremental gross profit = Incremental gross profit ÷ 12
- Payback period = Monthly CallingCrew cost ÷ Monthly incremental gross profit (no payback if monthly incremental gross profit is zero or negative)
Installer Revenue
What it measures: The total installer revenue from new enquiries plus missed-call recovery, comparing the current process with CallingCrew capture.
Key assumptions: Defaults are example assumptions for enquiry volume, missed-call volume, job value, conversion rates, gross margin and monthly CallingCrew cost. The monthly platform cost is a managed service fee and excludes Voice AI usage and call credits, which are charged separately.
View calculation method
- Enquiry revenue = New enquiries per month × 12 × Average job value × New-enquiry conversion rate ÷ 100
- Current missed-call recovery revenue = Missed calls × 12 × Average job value × Current callback recovery rate ÷ 100 × Qualified-enquiry rate ÷ 100 × Missed-call job-conversion rate ÷ 100
- With-CallingCrew captured-call revenue = Missed calls × 12 × Average job value × Capture rate ÷ 100 × Qualified-enquiry rate ÷ 100 × Missed-call job-conversion rate ÷ 100
- Current total revenue = Enquiry revenue + Current missed-call recovery revenue
- With-CallingCrew total revenue = Enquiry revenue + With-CallingCrew captured-call revenue
- Incremental revenue = With-CallingCrew total revenue − Current total revenue
- Incremental gross profit = Incremental revenue × Average gross margin ÷ 100
- Net gain = Incremental gross profit − Annual platform cost
- Payback uses the same monthly formula as the Missed-Call ROI calculator.
This model does not double-count improvements: the same qualified-enquiry and conversion assumptions apply to both the current callback process and the CallingCrew capture process.
Supplier Network ROI
What it measures: The network-wide revenue and gross-profit impact of converting missed or poorly routed enquiries into qualified leads through CallingCrew.
Key assumptions: Defaults are example assumptions for active installers, average enquiry value, missed calls per installer per month, qualification improvement, gross margin and annual platform cost. The annual platform cost is an example figure and excludes Voice AI usage and call credits, which are charged separately. You can still edit the annual cost manually if your agreement differs.
View calculation method
- Network enquiries per year = Active installers × Missed calls per installer per month × 12
- Current additional revenue = Network enquiries × Average enquiry value × 0% qualification improvement
- With-CallingCrew additional revenue = Network enquiries × Average enquiry value × Qualification improvement percentage ÷ 100
- Gross profit = Additional revenue × Average gross margin ÷ 100
- Net gain = Gross profit − Annual platform cost
- Annual platform cost recovery = Annual platform cost ÷ (Gross profit ÷ 12) (no recovery shown if monthly gross profit is zero or negative)
Supplier Network ROI - Quick Calculator
What it measures: The high-level annual supplier revenue and gross-profit impact of improving conversion across an installer network.
Key assumptions: Defaults are example assumptions for number of installers, average enquiries per installer per month, average system or order value, current conversion rate, expected conversion improvement, supplier gross margin and annual CallingCrew platform cost. The annual platform cost is configurable and excludes Voice AI usage and call credits.
View calculation method
- Improved conversion rate = Current conversion rate + Expected conversion improvement, capped at 100%
- Annual enquiries = Number of installers × Average enquiries per installer per month × 12
- Current converted enquiries = Annual enquiries × Current conversion rate ÷ 100
- With-CallingCrew converted enquiries = Annual enquiries × Improved conversion rate ÷ 100
- Current supplier revenue = Current converted enquiries × Average system / order value
- Revenue with CallingCrew = With-CallingCrew converted enquiries × Average system / order value
- Incremental revenue = Revenue with CallingCrew − Current supplier revenue
- Incremental gross profit = Incremental revenue × Supplier gross margin ÷ 100
- Net gain = Incremental gross profit − CallingCrew annual platform cost
- ROI = Net gain ÷ CallingCrew annual platform cost × 100
- Break-even point = Annual platform cost ÷ (Average system / order value × Supplier gross margin ÷ 100)
Important information
Results are illustrative and depend on the figures you enter. Replace the example values with your own business data before making commercial decisions.
Downloadable guide
A PDF version of this guide is available for sharing or offline reference. It contains the same assumptions, formulas, default values and source notes.