Incremental-lift ROI calculator
Use it with the owner's real numbers on a sales call. It shows extra gross profit, not top-line revenue.
| Case | Lift | Extra gross profit / mo | Payback |
|---|
Formula: lost/week × 4.33 × lift × job value × margin − running cost. Conservative = half the expected lift, and optimistic = 1.5×. All inputs are assumptions. Measure the baseline (for example 4 weeks of call logs) before promising anything. This is an illustration, not a guarantee.