Net Revenue Retention

Net Revenue Retention is a metric that shows how revenue from existing customers changes over time. To calculate it, you compare the revenue generated by a group of customers in one month or year with the revenue generated by exactly these same customers twelve months later. New customers are not counted at all – only those who were there from the start. The result is expressed as a percentage. If it comes out at 110%, that means: 100 euros of starting revenue became 110 euros, even though not a single new customer was added. If it comes out at 85%, the business is shrinking even as new customers join.

Why NRR determines the fate of subscription businesses

Many software companies don’t sell one-off products but rather monthly or annual subscriptions – so-called software-as-a-service models. In such business models, constantly acquiring new customers is expensive. If, on the other hand, existing customers spend more on their own, the cost per euro of revenue generated drops dramatically.

This is precisely what makes NRR the decisive metric. It bundles three effects into a single number: customers who upgrade their subscription (upgrades), customers who downgrade it (downgrades), and customers who cancel entirely (churn). All three effects feed into the calculation. A high NRR shows that the product grows along with its customers' growth – a strong signal for investors.

By comparison, the related metric Gross Revenue Retention (GRR) leaves upgrades out of the picture and only measures how much revenue was not lost. It can reach a maximum of 100%. NRR, on the other hand, can exceed 100%, because upgrades can more than offset revenue lost through churn. An NRR above 100% is therefore the more ambitious target.

How Net Revenue Retention is calculated

The formula is straightforward. You take the starting revenue from all existing customers at the beginning of a period. Then you add all upgrades that occurred during that period. Then you subtract all downgrades and all revenue lost through cancellations. The result is divided by the starting revenue and multiplied by 100.

An example: a company starts with 1,000 euros of monthly revenue from existing customers. Over the course of the year, 200 euros are added through upgrades. At the same time, customers worth 100 euros cancel, and others downgrade their package for 50 euros. The revenue at the end amounts to 1,050 euros. The NRR thus stands at 105%. This means: even without growth from new customers, the company is getting bigger.

As a rule of thumb in the software industry: an NRR of 100% or more is solid, and from 120% a company is considered exceptionally strong. Well-known examples with very high NRR values are database services or cloud infrastructure providers, where customers naturally book more capacity the more they grow.

Where the metric appears in news and products

NRR comes up almost every time technology companies prepare for their initial public offering (IPO) or publish quarterly results. Companies such as Snowflake, Datadog, or HubSpot cite NRR as one of their most important metrics, because it shows investors in a single number whether the core product delivers genuine value.

NRR is also omnipresent in startup reports and venture capital analyses. When a funding round for a SaaS company is announced, investors often scrutinize NRR even before revenue growth – because it shows whether that growth is sustainable or expensively bought.

In everyday life, the principle can be applied to familiar services. Anyone who switches to a cheaper package with a streaming service contributes to a declining NRR. Anyone who upgrades to a pricier one or subscribes to a second service from the same provider drives it up. It is precisely this behavior of existing customers that determines, in the long run, whether a subscription business becomes profitable – or not.