The method
How it is worked out
NRR = (start + expansion − contraction − churn) ÷ start; GRR excludes expansion
- cohort
- Customers who were paying a year ago; new customers excluded
Net Revenue Retention Calculator
Calculate NRR and GRR from expansion, contraction and churn, and see whether growth is coming from your existing customers. The result updates as you type so you can compare scenarios quickly.
Keep in mind
What it leaves out
- Cohort choiceMeasure a fixed cohort; mixing in new logos inflates NRR.
- TimingAnnual NRR and monthly NRR are not comparable.
- Multi-year contractsPrepaid annual deals can hide contraction until renewal.
Use the calculator to compare scenarios rather than as a guaranteed forecast.
About the Net Revenue Retention Calculator
Calculate net and gross revenue retention for a customer cohort and learn whether your growth is coming from the customers you already have or only from new ones.
How it works and an example to tryShow less
How to use the result
Net revenue retention is the cohort's revenue today, after expansion, contraction and churn, divided by its revenue a year ago. Gross retention excludes expansion. Both are benchmarked against typical B2B SaaS ranges.
Example to try
A cohort worth £100,000 a year ago that expanded by £22,000, downgraded by £6,000 and churned £9,000 is worth £107,000: 107% NRR and 85% GRR. Healthy, but the expansion engine has room to grow.
Put it to work
Try it on a real situation
Load an example
What moves the result most
Worked out from your figures above. Tap a row to try it.
Who uses it, and when
SaaS finance and customer-success teams, founders preparing investor metrics and operators deciding between acquisition and expansion spend.
Mistakes worth avoiding
- Including new customers in the cohort, which inflates the figure.
- Comparing a monthly NRR with an annual one.
- Ignoring gross retention, which shows the leak that expansion is covering.
Questions
What does the Net Revenue Retention Calculator do?
Calculate NRR and GRR from expansion, contraction and churn, and see whether growth is coming from your existing customers.
How should I use the result?
Net revenue retention is the cohort's revenue today, after expansion, contraction and churn, divided by its revenue a year ago. Gross retention excludes expansion. Both are benchmarked against typical B2B SaaS ranges.
Does TechBullion store the information I enter?
The core calculation or transformation runs in your browser. Normal website security and analytics may still record page-level events, but the tool does not need to create a public record from your inputs.
What mistakes do people make with a net revenue retention calculator?
Including new customers in the cohort, which inflates the figure. Comparing a monthly NRR with an annual one. Ignoring gross retention, which shows the leak that expansion is covering.
Is the result guaranteed?
No. Use the result as a practical check or planning aid and verify important decisions with the relevant primary source, provider or professional advice.
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Results are estimates based on the figures entered, for general information only, and not financial, investment, tax or legal advice. See our terms of use.