NDR stands for net dollar retention, a metric that measures how much revenue a company keeps and grows from its existing customers over a set period. Also called net revenue retention (NRR), it’s one of the most closely watched numbers in subscription and SaaS businesses because it reveals whether current customers are spending more, less, or walking away entirely. An NDR above 100% means a company is growing revenue from its existing base without signing a single new customer.
How NDR Is Calculated
The formula breaks down like this:
NDR = (Beginning Recurring Revenue + Expansion Revenue − Churned Revenue) ÷ Beginning Recurring Revenue
Each component captures a different part of your customer revenue picture:
- Beginning recurring revenue: The monthly or annual recurring revenue from existing customers at the start of the period.
- Expansion revenue: Additional revenue generated when existing customers upgrade their plan, buy add-on products, or move into a higher pricing tier. This includes upsells and cross-sells.
- Churned revenue: Revenue lost when customers cancel, don’t renew, or downgrade to a cheaper plan.
Say your company starts a quarter with $500,000 in monthly recurring revenue from existing customers. During that quarter, upgrades and add-ons bring in $40,000, but cancellations and downgrades cost you $25,000. Your NDR would be ($500,000 + $40,000 − $25,000) ÷ $500,000 = 103%. That means your existing customer base grew its spending by 3% without any new sales.
What a Good NDR Looks Like
The 100% line is the critical threshold. At exactly 100%, your expansion revenue perfectly offsets your losses from churn and downgrades. Below 100%, your existing customer base is shrinking, and you need new customers just to stay flat. Above 100%, your current customers are generating organic growth on their own.
For private SaaS companies with average contract values between $25,000 and $50,000, the median net revenue retention sits around 102%, according to SaaS Capital. Top-quartile companies in that range hit 111%, while bottom-quartile performers report 97%. Many successful subscription businesses aim for 110% or higher as a target.
The numbers shift depending on your customer segment. Companies selling to enterprise buyers typically see higher NDR because large accounts have more room to expand usage. Companies selling smaller plans to individuals or small businesses tend to see higher churn rates, which makes breaking above 100% harder.
Why NDR Matters More Than New Sales
Investors and acquirers treat NDR as one of the strongest signals of business health, sometimes weighing it more heavily than new customer growth. The reasoning is straightforward: acquiring new customers is expensive and unpredictable, while revenue growth from existing customers signals that your product is sticky, that customers find increasing value over time, and that the business can scale efficiently.
The valuation impact is dramatic. Software Equity Group found that public software companies with NDR above 120% trade at a 63% premium over the market median, with a median enterprise value of 9.3 times trailing revenue. Companies with NDR below 100% trade at a 46% discount, with a median multiple of just 3.1 times revenue. That gap illustrates how much weight the market puts on a company’s ability to grow within its existing customer base.
A low NDR also raises a practical concern: it means the company has to keep pouring money into sales and marketing just to replace lost revenue before it can grow. That creates a treadmill effect where the business works harder and harder to stay in place.
NDR vs. Gross Revenue Retention
NDR has a companion metric called gross revenue retention (GRR) that strips out all the good news. GRR measures only how much existing revenue you kept, ignoring any expansion or upsells. It answers a simpler question: how much revenue did you lose?
The GRR formula removes expansion revenue from the equation entirely. If you started with $500,000 and lost $25,000 to cancellations and downgrades, your GRR is $475,000 ÷ $500,000 = 95%. GRR can never exceed 100% because it doesn’t count any revenue gains.
Think of GRR as your defensive metric. It tells you how well you hold onto what you already have. A GRR of 90% or higher is considered healthy for most SaaS companies, while anything below 85% that’s trending downward signals a serious retention problem. NDR, by contrast, is your offensive metric. It shows whether your growth engine within the existing base is strong enough to outrun your losses.
A company can have a high NDR but a mediocre GRR if it’s losing a fair number of customers but making up for it with aggressive upselling to the ones who stay. That combination might look fine on paper, but it can be fragile. Watching both metrics together gives you a fuller picture.
How Businesses Improve NDR
Since NDR has only two levers, increasing expansion revenue and reducing churn, improvement strategies fall into those two buckets.
On the expansion side, tier-based pricing gives customers a natural path to spend more as their needs grow. Usage-based pricing models automatically increase revenue as customers use the product more heavily. Cross-selling complementary features or products works especially well when the add-ons solve problems your customers are already telling your support team about.
On the churn side, the most effective approaches focus on making the product more embedded in daily workflows. When your software connects to other tools a customer relies on, switching costs rise naturally. Proactive customer success outreach, particularly identifying accounts showing early signs of disengagement like declining logins or feature usage, lets you intervene before a cancellation happens rather than scrambling afterward.
Pricing structure matters too. Contracts with annual commitments reduce churn compared to month-to-month plans simply because customers have fewer decision points where they might leave. Offering meaningful discounts for annual billing can shift more of your base into longer commitments, smoothing out your retention numbers and making revenue more predictable.