Dear CFO by Phoenix Strategy Group

Planning & reporting

Driver-based forecasting

Driver-based forecasting builds a forecast from the few operational numbers that cause the results, such as leads, conversion rate or price, instead of typing in each line.

Formula

Each forecast line is calculated from its drivers (for example, leads × conversion rate × average order value), so changing one driver updates every line that depends on it.

Worked example

Leads per month2,000
Conversion rate5%
Average first order$1,200

2,000 × 5% = 100 new customers × $1,200 = $120,000. At a 6% conversion rate it is 120 customers and $144,000.

Why it matters

A forecast built on drivers can be questioned and tested: if revenue looks too high, you can see which assumption is doing the work. It also makes scenarios quick, because you change a driver rather than rewriting dozens of lines.

Common mistakes

Where it misleads

Choosing drivers that are not really linked to the result, so the forecast looks rigorous but predicts nothing.

Using too many drivers, which makes the model fragile and hard for anyone else to follow.

Never checking the drivers against actuals, so a conversion rate set a year ago quietly stops being true.

Stop calculating it by hand.

Dear CFO keeps your statements, forecasts and metrics current from the systems you already run.