What is net revenue retention (NRR)?
Net revenue retention (NRR) measures the revenue kept from existing customers over a period, including expansion, contraction, and churn. NRR above 100% means existing customers grow faster than they churn — the business compounds without adding new customers.
Net revenue retention (NRR) measures the percentage of revenue retained from existing customers over a period, after accounting for expansion (upgrades, additional seats), contraction (downgrades), and churn (cancellations). An NRR above 100% means existing customers generate more revenue over time than they lose — the business compounds without requiring new customer acquisition to maintain its revenue base.
How do you calculate NRR?
NRR = (Starting MRR + Expansion MRR - Contraction MRR - Churned MRR) ÷ Starting MRR × 100. Example: start the quarter with $100K MRR from existing customers. Expansions add $15K. Contractions reduce $5K. Churn removes $8K. Ending MRR from those customers is $102K. NRR = 102%. The business grew from existing customers alone, before a single new customer was added.
What is a good NRR benchmark in B2B SaaS?
Best-in-class B2B SaaS companies (Snowflake, Datadog, early Slack) maintain NRR of 120–140%. Strong SMB SaaS companies sit at 100–115%. Below 100% means the existing customer base is shrinking — new sales are required just to hold revenue flat, let alone grow. For companies below $5M ARR, achieving 100%+ NRR is a strong signal of product-market fit and a green light to invest more in acquisition.
Why does NRR matter more than gross churn for early-stage companies?
Gross churn tells you what you're losing. NRR tells you what the business is worth to build on. A company with 5% annual gross churn but 120% NRR is a better business than one with 1% gross churn and 95% NRR — the first has a compounding customer base, the second has a slowly shrinking one. Investors use NRR as a primary signal of whether the business has genuine product stickiness or just expensive customer acquisition masking a retention problem.
What drives NRR above 100%?
Product that expands naturally as usage grows (seat-based or usage-based pricing where value delivered drives natural upsell), a customer success function that proactively identifies expansion opportunities, and a product that becomes more embedded over time rather than easier to replace. NRR is ultimately a product and customer success metric more than a sales metric — it reflects whether customers are getting enough value to grow their investment.