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Net revenue retention: measure what existing customers do after churn, contraction, and expansion

NRR follows a starting customer cohort and measures the recurring revenue that remains after churn and contraction plus expansion. A clean calculation starts with a stable cohort and reconciled recurring revenue.

Published August 29, 2026Reviewed August 29, 2026 1 min read

NRR answers what happened to the customers you already had

Start with recurring revenue from a defined customer cohort at the beginning of the period. Then reflect churn, contraction, and expansion from those same customers. New customers are excluded from the core calculation.

That makes NRR a retention and expansion measure rather than a total growth rate.

Keep the cohort fixed

Adding new customers into the denominator or numerator can hide weakness in the original base. Define whether the measurement is monthly, quarterly, or annual and keep the cohort rules consistent.

Document treatment for acquisitions, divestitures, currency changes, and customer merges.

Tie the result to the ARR or MRR roll-forward

Expansion, contraction, and churn used in NRR should come from the same recurring revenue schedule management relies on elsewhere. If NRR requires a separate spreadsheet with different customer values, reconcile the difference.

A consistent source reduces metric debates at board meetings.

Use segmentation to understand the business model

NRR can differ sharply between small business, mid-market, and enterprise customers or between products. Compare segments only when the definitions and periods are consistent.

The metric becomes useful when it changes retention, pricing, product, or customer-success decisions.

Frequently asked questions

Questions buyers usually ask

Does net revenue retention include new customers?

The standard concept focuses on the starting customer cohort, so new-customer revenue is generally excluded from the calculation.

Can NRR be above 100 percent?

Yes. Expansion from existing customers can exceed churn and contraction, producing net retention above the starting recurring revenue base.

Official sources

Check provider facts at the source.

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