Why growth rate matters to a first-time founder
This rate lets founders compare changes across metrics and periods even when absolute sizes differ. It can reveal momentum in revenue, customers or costs. The comparison only works when definitions, period lengths and treatment of acquisitions or currency remain consistent.
Examples of growth rate
Monthly revenue rises from £80,000 to £100,000. The growth rate is 25%: the £20,000 increase divided by the earlier £80,000. If the comparison month was unusually weak, the founder also shows a longer trend to provide context.
Common misunderstanding
It is not always positive and it does not explain why a value changed. Percentage growth from a small base can look dramatic, while a zero or negative starting value needs different treatment. Annualised and compound rates are separate calculations.
When to use it
Use it with the metric, starting and ending periods, formula and any adjustments stated clearly. Compare like with like and show absolute values beside percentages. Do not cherry-pick a weak baseline or annualise a short spike without explaining the assumption.