Net revenue retention
Definition
Net revenue retention is what an existing group of customers is worth after twelve months, as a percentage of what they were worth at the start, counting upgrades, downgrades and cancellations but no new customers. Above 100% the base grows on its own. Below it, new sales only fill a leak.
Net revenue retention (NRR) measures what a fixed group of existing customers is still paying after a period, as a percentage of what that same group paid at the start, including upgrades and downgrades but excluding anyone acquired since.
What it means at this size
NRR answers the question a buyer at $50,000–$150,000 actually cares about: if nothing else happens, what does this business earn next year? Churn describes what leaves. NRR nets that against what the remaining customers grew into, which is the closer picture of the revenue being transferred.
Businesses at this size rarely clear 100%. Expansion revenue needs usage-based pricing or seats to expand into, and plenty of good micro-SaaS has neither. Somewhere in the high eighties to mid nineties is normal and not a problem, provided the seller knows the figure and can show how it was reached.
Where it bites
An NRR below 100% sets the running speed a new owner has to maintain before they earn anything. Buyers convert it straight into a monthly sales target and judge whether the acquisition channel can carry it. If growth depends on one channel the seller personally worked, the target and the channel both look fragile.
Worked example
A micro-SaaS had $3,000 of MRR twelve months ago. From that same group of customers, $600 cancelled, $150 downgraded and $450 upgraded, leaving $2,700. NRR is 90%.
The business still bills $3,000 today because new sales covered the gap. But the buyer now knows they must add $300 of MRR every twelve months, or $3,600 of annual billings, before the business grows at all. On $40,000 of SDE, that gap will move the multiple within the 2–4× band rather than break the deal: roughly the difference between a $120,000 ask and a $100,000 one.
Why it matters when you exit
NRR is one of the few figures that lets a small business argue for the top of its range. Work it out honestly, present it alongside twelve months of cohort data, and explain what moves it. A seller who volunteers a 90% NRR reads as competent. A seller who has never calculated it reads as someone whose other numbers also need checking.
Related: churn, mrr-and-arr, customer-concentration, how-much-is-my-saas-business-worth
See what a business at this level is listed at.
Everything on sale between $50,000 and $150,000, on the same fields.