Tag

churn rate

Illustration of one month of churn: 20 teal squares for customers on day one, 2 of them crossed out in red; 6 grey squares for new this month in a dashed box labelled not in this month's denominator; below, Churn = lost ÷ start = 2 ÷ 20 = 10%

MetricsNovember 4, 2026

Churn Rate: The Formula, a Worked Example and the Mistakes That Skew It

Monthly churn rate is customers lost ÷ customers at the start of the month. This guide works through an example, shows why monthly × 12 is wrong, how to turn churn into lifetime, and how much churn moves by chance at startup sample sizes.

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Illustration of the net revenue retention bridge: a Start bar, a teal + Expansion block added, an orange − Contraction block and a red − Churn block taken away, and an End bar; a grey New customers bar to the side is crossed out, labelled not counted

MetricsOctober 28, 2026

Net Revenue Retention: The Formula, a Worked Example and the Traps

Net revenue retention shows whether your existing customers' revenue grows without new sales. The NRR and GRR formulas, a worked example, why the same NRR can hide two different businesses, and the mistakes that inflate it.

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