What last year’s customers are worth this year, counting upgrades, downgrades and cancellations but no new customers. Above one hundred per cent means the existing base grows on its own — the single number buyers most often ask for first.
Why it matters
Net revenue retention isolates one specific question from everything else happening in the
business: setting aside every new customer won this year, what happened to the customers the
company already had? That question matters to a buyer more than almost any other single figure,
because new sales can be turned up or down with spend, while what existing customers do reveals
whether the product itself is worth paying more for, worth the same, or being quietly abandoned.
A company can post strong overall revenue growth while its NRR is weak, simply by outrunning
churn with new logo acquisition. That combination is exactly what a buyer is trying to catch,
because it means growth is currently being bought rather than compounding on its own — a
meaningfully different story about what happens if new-customer spend slows down.
How it works
NRR is calculated by taking the group of customers who were paying at the start of a period,
tracking what they are paying twelve months later, and dividing the two.
What counts in the "later" figure: upgrades to a higher plan, expansion from added seats or
usage, downgrades, and cancellations from that same original group. What does not count:
revenue from any customer who was not already in the starting group — new logos are entirely
excluded from this calculation, by design.
A figure above the starting revenue means the existing base is growing without any new sales
at all — expansion outweighing churn and downgrades within that same cohort. A figure below it
means the opposite: what the company already had is shrinking on its own, even before counting
whatever new business came in.
The period matters. NRR is almost always quoted on a trailing twelve-month basis, because a
shorter window is noisy — a single large renewal or cancellation can swing it sharply — and the
figure is only comparable to another company's if both are measuring the same length of time.
On GetDeal
A GetDeal listing does not carry NRR as a figure of its own; where a startup reports
it, a buyer should expect to see it in the company's own materials and in the data room. The AI
analysis report sees NRR only where public sources or the deck state it: when it weighs how durable
the company's growth looks in its valuation range and confidence scoring, it works from public
sources and, where supplied, the company's own statements, which it treats as claims rather than verified facts. It does
not audit the cohort math behind a reported NRR either, which is exactly why a Verified listing's
checked figures carry more weight with buyers.
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Questions people ask
- Why do buyers ask for net revenue retention before other metrics?
- Because it isolates the health of the existing customer base from the effect of new sales, which can be increased or decreased simply by spending more or less on acquisition. A strong NRR figure suggests the product itself keeps earning more from the customers who already have it, which is a harder thing to manufacture than a headline growth number and a more durable signal about the business.
- Can a company have strong revenue growth and weak net revenue retention at the same time?
- Yes, and it is one of the more common ways a growth story can mislead. If new customer acquisition is strong enough, total revenue can keep rising even while the existing customer base is shrinking through churn and downgrades faster than it expands. That combination means growth currently depends on continually replacing lost revenue rather than on the product retaining and growing what it already has.
- Does net revenue retention include revenue from new customers?
- No, by definition it excludes any customer who was not part of the starting cohort. The calculation only follows the group of customers present at the beginning of the period and tracks what they are paying a year later, specifically so that new sales cannot mask what is happening to the customers the company already had before the period began.
See also
More in Metrics
- ARR — The annualised value of subscription revenue that repeats — contracted and expected to continue.
- Burn rate — How much cash the company consumes each month.
- CAC — What it costs, on average, to win one customer — sales and marketing spend divided by customers gained.
- Churn — The rate at which customers or their revenue leave.
- EBITDA — A measure of operating profit that strips out financing, tax and accounting charges for past spending, so two businesses can be compared on how well the operations themselves earn..
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Updated 2026-09-09