Net revenue retention measures what last year's customers spend this year, including expansion, downgrades and churn, but excluding any new customers. Above 100% means the existing base grows on its own. It is the most predictive single metric for a subscription business.
Why it predicts more than growth does
Headline revenue growth blends two very different things: winning new customers, which costs money and stops when marketing spend stops, and existing customers spending more, which costs almost nothing and compounds. Net revenue retention isolates the second.
A company growing 40% with retention of 95% is buying every point of that growth and will decelerate hard the moment acquisition slows. A company growing 25% with retention of 125% would still grow if it stopped selling entirely. The second is a far better business and the headline number says the opposite.
Worked example
A cohort of customers generated $100M last year. This year the same customers spent $118M more through upgrades, $6M less through downgrades, and $9M was lost to cancellations.
($100M + $18M − $6M − $9M) ÷ $100M = 103%
Modest, and above the line that matters. Note that expansion is doing all the work: gross retention, which excludes upgrades, is only 85%, so this business loses customers steadily and grows the survivors fast enough to cover it.
What counts as good
- Below 100% means the base shrinks without new sales. Growth is entirely purchased and will stop when spending does.
- 100% to 110% is respectable and typical for software selling to small businesses, where churn is structurally higher.
- 110% to 130% is strong, and characteristic of products that expand with a customer's usage or headcount.
- Above 130% is exceptional and worth checking. It usually indicates usage-based pricing in a fast-growing category, which also means it will fall when that category slows.
Read gross retention alongside it
Net retention can hide a leaky bucket, because expansion from a few large accounts masks steady losses elsewhere. Gross retention excludes upgrades and answers a different question: what share of revenue simply stayed?
Net 120% with gross 95% is a healthy business. Net 120% with gross 80% is a business losing customers quickly and covering it by growing a handful of accounts, which is far more fragile than the headline suggests and concentrates risk in the accounts doing the expanding.
Where it connects to the rest
High net retention is switching costs and network effects showing up as a single number, which is why it is the cleanest financial evidence a software moat exists. It also drives the Rule of 40, since retained revenue costs almost nothing to keep.
Definitions vary between companies, and the metric is not standardised or audited. Some include only customers above a revenue threshold, some exclude certain products. Read the definition in the filing before comparing two companies on it.
Retention matters most in one phase
Net revenue retention is the number to watch in hyper growth and matters less once a company matures into capital return. Phase Check places any US-listed company on the lifecycle and names the metric that belongs there.
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Frequently asked questions
Related
- Switching costs, what high retention usually is underneath
- Rule of 40, the test retained revenue feeds
- Economic moat, the evidence retention provides
- The 5 lifecycle phases, when retention is the metric to watch