A forecast should be a calculation, not a feeling
If your forecast is built from how confident each rep sounds, you do not have a forecast. You have a mood.
23 August 2026 · By Adam Kassem and Fadel Chit
Most forecasts are a column of percentages somebody typed in. Ninety per cent means the rep is optimistic. Fifty means they are hedging. Nobody can say what either number is derived from, because neither is derived from anything.
What a calculated forecast needs
Three things, and only three:
- A stage that means something specific and observable.
- A historical conversion rate for that stage, from your own deals.
- Enough deals for that rate to be worth anything.
That is it. The arithmetic is trivial once the stages are honest.
Honest stages
A stage is honest when two people looking at the same deal would put it in the same one. "Interested" is not honest. "Has agreed a date to review the proposal with the person who signs" is.
The test is not whether the stage sounds right. It is whether it can be wrong.
The uncomfortable part
Your first calculated forecast will be lower than your typed one, and it will be closer. That is the entire value of it, and it is why teams resist the change for about a quarter and then never go back.
Rates drift, so recalculate them. Once a quarter is plenty; once a week is somebody avoiding real work.
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