Direct Answer

Net Revenue Retention (NRR) is the percentage of recurring revenue a SaaS company retains from an existing customer cohort over a period, typically one year, including upsells and expansions but net of downgrades and churn. It is calculated as (starting ARR from the cohort + expansion - contraction - churn) divided by starting ARR from that cohort. NRR above 100% means the existing customer base is growing revenue even before counting any new customers, commonly cited as a sign of a strong product and expansion motion; NRR below 100% means the existing base is shrinking.

Key Takeaways

  • NRR isolates the existing customer base. It is calculated only on the cohort of customers present at the start of the period, revenue from new customers acquired during the period is excluded from the calculation.
  • The formula nets three components against starting ARR. Expansion (upsells, seat additions, upgrades) is added; contraction (downgrades) and churn (cancellations, non-renewals) are subtracted, all divided by the cohort's starting ARR.
  • Above 100% means net growth from the existing base alone. This is commonly cited as a signal of strong product-market fit and an effective expansion motion, though what counts as strong varies by company size, pricing model, and customer segment.
  • Below 100% means the existing base is shrinking, a company can still post overall revenue growth with sub-100% NRR if new-customer bookings are large enough to offset the loss, but that growth is coming entirely from new logos.
  • NRR is not a GAAP-defined metric. Public SaaS companies that disclose it define the cohort, measurement window, and what counts as expansion or contraction themselves, the accompanying methodology notes matter as much as the headline figure.

What Is the NRR Formula?

NRR measures the percentage of recurring revenue retained from an existing customer cohort over a period, typically one year, including the effects of upsells and expansions but net of downgrades and churn. The formula is:

NRR = (Starting ARR + Expansion − Contraction − Churn) ÷ Starting ARR

Each term applies only to the cohort of customers that was active at the start of the measurement period:

  • Starting ARR, the annual recurring revenue attributable to that cohort at the beginning of the period.
  • Expansion, additional recurring revenue from customers in the cohort during the period, such as seat additions, plan upgrades, or new product-module purchases.
  • Contraction, a reduction in recurring revenue from a customer that remains active, such as a downgrade to a cheaper plan or a reduction in seats.
  • Churn, recurring revenue lost entirely because a customer in the cohort cancels or does not renew.

Revenue from customers acquired after the period began is deliberately excluded. That exclusion is what makes NRR a measure of the health of the existing base rather than of total company growth, a company can grow total ARR quickly through new-customer sales while its existing base is quietly shrinking, and NRR is the metric that would surface that.

NRR vs. Gross Revenue Retention

Gross revenue retention (GRR) uses the same cohort approach but omits expansion, counting only contraction and churn against starting ARR. Because it excludes any positive contribution, GRR is capped at 100%. NRR adds expansion back in, so it can exceed 100%. Looking at both together separates how much of NRR is coming from retaining revenue (GRR) versus growing it through upsells (the gap between NRR and GRR), two companies can post the same NRR for very different reasons.

Worked Example

Hypothetical example, for education only. The figures below are illustrative, not derived from a real company.

  1. Define the cohort and starting point. A SaaS company's customer cohort had $10,000,000 in annual recurring revenue (ARR) at the start of the year.
  2. Add expansion. Over the year, existing customers in that cohort added $1,800,000 in ARR through seat expansions and plan upgrades.
  3. Subtract contraction. Some customers downgraded, reducing ARR by $400,000.
  4. Subtract churn. Other customers in the cohort canceled entirely, removing $900,000 in ARR.
  5. Apply the formula. Ending cohort ARR = $10,000,000 + $1,800,000 − $400,000 − $900,000 = $10,500,000. NRR = $10,500,000 ÷ $10,000,000 = 105%.

An NRR of 105% means this cohort's revenue grew 5% over the year purely from expansion within the existing base, net of everything the company lost to downgrades and cancellations, before a single new customer is counted. If the same company had instead seen $1,000,000 of churn and only $600,000 of expansion, ending ARR would have been $10,000,000 + $600,000 − $400,000 − $1,000,000 = $9,200,000, for an NRR of 92%, the existing base shrinking even though nothing about the starting cohort size changed.

Limitations and Common Mistakes

Treating NRR as interchangeable with total revenue growth

NRR says nothing about how many new customers a company signed during the period. A company can report high total revenue growth while its NRR is flat or declining, if that growth is being driven entirely by new-logo bookings rather than expansion of the existing base. Reading NRR alongside new-customer ARR gives a fuller picture than either number alone.

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Comparing NRR figures without matching methodology

Because NRR is not a GAAP-defined metric, companies differ in how they define the customer cohort (all customers vs. only those above a revenue threshold), the measurement window (trailing twelve months vs. fiscal year), and what counts as expansion versus a separate new sale. Comparing headline NRR numbers across two companies without checking their stated methodology can produce a misleading comparison.

Ignoring the gap between NRR and gross revenue retention

A high NRR driven mostly by expansion from a small number of large accounts can mask weak retention among the broader customer base. Reviewing NRR together with gross revenue retention and customer-count (logo) retention shows whether growth is broad-based or concentrated.

Assuming a single benchmark applies universally

What counts as a strong NRR is commonly cited as a signal of product strength, but the number that is considered strong is not universal, it varies by company size, average contract value, target customer segment (enterprise vs. small business), and pricing model (seat-based vs. usage-based). A number that looks strong for one company profile may be unremarkable for another.

FAQ

What is Net Revenue Retention?

Net Revenue Retention (NRR) is the percentage of recurring revenue retained from an existing customer cohort over a period, typically one year, including the effects of upsells and expansions but net of downgrades and churn. It is calculated as (starting ARR from the cohort + expansion - contraction - churn) divided by starting ARR from that cohort. NRR excludes any revenue from customers acquired after the period began, isolating how the existing base behaves on its own.

What does NRR above 100% mean?

NRR above 100% means the existing customer base is growing revenue even before counting any new customers, because upsell and expansion revenue is outpacing the revenue lost to downgrades and churn. This is commonly cited as a sign of a strong product and expansion motion, though what counts as a strong number is not universal and varies by company size, pricing model, and customer segment.

What does NRR below 100% mean?

NRR below 100% means the existing customer base is shrinking, the recurring revenue lost to downgrades and churn during the period exceeded the revenue gained from upsells and expansions within that same cohort. A company can still grow total revenue with NRR below 100% if new-customer bookings are large enough, but that growth is being generated entirely from new logos rather than the existing base.

How is NRR different from gross revenue retention?

Gross revenue retention (GRR) measures only the negative effects, contraction and churn, against starting ARR, and is capped at 100% because it excludes upsells. NRR adds expansion revenue back in, so it can exceed 100%. GRR isolates how much revenue a company would keep with no expansion motion at all; NRR shows the combined effect of both losing and growing revenue within the same cohort. Comparing the two separately shows whether a high NRR is coming from strong retention, strong expansion, or both.

What counts as expansion, contraction, and churn in the NRR formula?

Expansion is additional recurring revenue from an existing customer during the period, such as seat additions, upgraded plan tiers, or new product modules. Contraction is a reduction in recurring revenue from a customer that remains active, such as a downgrade to a cheaper plan or fewer seats. Churn is the loss of recurring revenue from a customer that cancels or does not renew entirely. All three are measured only against the cohort's starting ARR, not against revenue from customers added after the period began.

Where do public SaaS companies report NRR?

Public SaaS companies that disclose NRR (also called net dollar retention or net revenue retention rate) typically report it in the MD&A section of their 10-K or 10-Q filings, in quarterly earnings materials, or in investor presentations. Because NRR is not a GAAP-defined metric, disclosure is voluntary and companies can differ in how they define the customer cohort, the measurement period, and what counts as expansion or contraction, the methodology notes accompanying the disclosure matter as much as the headline number.

Does net revenue retention include customers acquired during the measurement period?

No. NRR is measured against a fixed cohort defined at the start of the window, so customers signed during the period are excluded from both the numerator and the denominator. That is what makes it a measure of how the existing base behaved rather than a measure of total growth. Companies vary in how they define the cohort, for example whether they use customers above a spending threshold, which is why two similar-looking NRR figures may not be measuring the same population.

How does seat-based pricing versus consumption pricing change NRR?

Seat-based pricing ties expansion to headcount growth at the customer, so NRR moves with hiring and with how widely the product spreads internally. Consumption pricing ties expansion to usage volume, which can climb quickly during a customer growth phase and fall just as quickly when budgets tighten. Consumption-based businesses therefore tend to show more volatile NRR in both directions. Neither structure is inherently better, but the volatility profile should be considered before reading a single quarter as a trend.

Can net revenue retention stay above 100% while total revenue growth slows?

Yes, and the combination is common. NRR describes only the existing base. If new customer acquisition slows, total revenue growth decelerates even while existing customers keep expanding. The reverse also happens: NRR can fall while total growth holds up because a strong new-logo quarter offsets it. Reading NRR next to new customer additions and total revenue growth avoids drawing a conclusion about the whole business from a metric that deliberately describes only part of it.

References

Disclaimer

This article is for educational and informational purposes only and does not constitute personalized investment, financial, or legal advice. NRR definitions and disclosure practices vary by company and are not standardized under GAAP. Always verify a company's specific methodology from its primary filings before relying on a reported figure. Trading involves risk, including the possible loss of principal.