Net Revenue Retention
Net revenue retention (NRR) measures how much recurring revenue you retain and grow from your existing customer base over a given period, typically twelve months. It accounts for everything: upgrades, downgrades, and cancellations. If you started the year with $1 million in ARR from a cohort of customers and that same cohort now generates $1.1 million, your NRR is 110%. No new customers. Just existing ones generating more revenue.
NRR is widely considered the single most important health metric for a SaaS business. It captures retention, expansion, and satisfaction in one number. A company with NRR above 100% grows even if it never acquires another customer. A company with NRR below 100% is on a treadmill, needing constant new acquisition just to stay flat.
The formula is straightforward: take the starting MRR from a cohort, add expansion revenue (upgrades, additional seats, upsells), subtract contraction revenue (downgrades), subtract churned revenue (cancellations), and divide by the starting MRR. The result is a percentage that tells you whether your existing revenue base is growing or shrinking.
Why it matters for SaaS
NRR is the metric that separates good SaaS businesses from great ones. Public SaaS companies with NRR above 120% trade at materially higher revenue multiples than those below 100%. Investors treat NRR as a proxy for product-market fit, pricing power, and customer satisfaction because a number above 100% means customers are voting with their wallets that your product is becoming more valuable to them over time.
The compounding effect is what makes NRR so powerful. Consider two companies, both acquiring $500,000 in new ARR each quarter. Company A has 95% NRR. Company B has 115% NRR. After three years, Company A has $5.2 million in ARR. Company B has $8.7 million. Same acquisition engine, 67% more revenue, entirely because of what happens after the initial sale. Over five years, the gap becomes a chasm.
For PLG companies, NRR carries additional strategic importance. The PLG model depends on landing small and expanding over time. A typical PLG deal might start with a single user on a free tier, convert to a paid individual plan, grow to a team plan, and eventually become a department or company-wide deployment. NRR is the metric that tracks whether this land-and-expand motion is actually working. If your NRR is below 100% in a PLG model, your expansion engine is broken and the entire strategy is at risk.
How it works in practice
Calculating NRR requires clean revenue data segmented by customer. Start with the monthly recurring revenue from all customers who were active at the beginning of the measurement period. Do not include customers acquired during the period. Then measure what that same group of customers contributes at the end of the period.
Suppose you begin January with $200,000 in MRR from 100 customers. By the end of December, those same customers generate $210,000: $30,000 in expansion from upgrades and added seats, $12,000 lost to downgrades, and $8,000 lost to cancellations. Your NRR is ($200,000 + $30,000 - $12,000 - $8,000) / $200,000 = 105%.
The value of NRR increases when you segment it. Track NRR by customer size, acquisition channel, plan tier, and industry. You may discover that your enterprise segment has 130% NRR while your SMB segment has 85%. That tells you where to invest in retention and where to lean into expansion. Blended NRR hides these critical differences.
Leading indicators matter too. By the time NRR drops, the damage was done months ago. Track the upstream signals: product usage trends, feature adoption rates, support ticket sentiment, and expansion pipeline. A customer whose usage is declining for three consecutive months is a contraction or churn risk that will not show up in NRR until the renewal happens.
Net Revenue Retention vs Gross Revenue Retention
NRR and gross revenue retention (GRR) answer different questions about your business. GRR measures only the revenue you kept, excluding any expansion. It tells you the floor: how much of your existing revenue would you retain if nobody ever upgraded. NRR includes expansion, so it tells you the net outcome.
GRR can never exceed 100%. If your GRR is 90%, you are losing 10% of your revenue base to downgrades and churn every year before any expansion offsets. NRR can exceed 100% when expansion revenue from surviving customers outweighs the losses.
Both metrics are necessary for a complete picture. A company with 115% NRR and 80% GRR is growing from existing customers in aggregate, but it has a serious underlying retention problem masked by strong upselling. That is a fragile position. If expansion slows, the churn underneath will surface quickly. The healthiest businesses have both high NRR (above 110%) and high GRR (above 90%), indicating that they retain most customers and grow them further.
How Floe approaches this
Floe contributes to NRR by deepening product adoption within existing accounts. When users discover and adopt more features, they derive more value, which creates the natural conditions for seat expansion and plan upgrades. An AI agent that proactively introduces relevant features based on a user's actual workflow makes expansion organic rather than forced.
The effect is particularly strong for multi-user accounts. When one user discovers a capability through Floe and shares it with their team, it pulls additional users into the product. Those additional users become additional seats, which drives expansion revenue. The AI agent accelerates the internal virality that PLG companies depend on for growing accounts from within.
FAQ
What is a good NRR for SaaS? For enterprise SaaS, above 120% is excellent and common among best-in-class companies like Snowflake and Datadog. For mid-market, 105 to 115% is strong. For SMB-focused products, above 100% is good and above 105% is strong. The key benchmark is 100%: above it means your existing base is growing, below it means you need new acquisition to offset erosion.
How do you improve NRR? There are two levers: reduce churn and contraction (the denominator defense) and increase expansion (the numerator offense). On the defense side, improve onboarding, reduce time-to-value, and implement proactive health monitoring. On the offense side, build natural expansion paths like usage-based pricing, team features, and premium tiers that unlock real value. The highest-impact move is usually improving activation, which drives both retention and eventual expansion.
Should NRR include annual contracts that have not renewed yet? This is a common source of confusion. Standard practice is to recognize expansion and contraction as they occur, not at renewal. If a customer adds seats in month three of an annual contract, that expansion counts in the month it happens. For churn, if a customer indicates they will not renew, some companies wait until the contract ends while others recognize it at the cancellation signal. Be consistent and document your methodology.