Net New Users
The net change in active user seats between two periods: new and upgraded seats minus churned and downgraded seats, as a signed integer.
◆ Count
Formula
Built from
What it measures
The net movement in your active seat count over a period, equal to ending Total Users minus starting Total Users. It decomposes into four flows: seats joining (New Users) and expanding (Upsell Users) on the inflow side, against seats canceling (Churned Users) and shrinking (Downsell Users) on the outflow side. Positive NNU means the user base grew; negative means it contracted. It counts seats, not logos.
Why it matters
NNU answers the one question gross metrics hide: are you net-growing or net-shrinking? New Users alone is a vanity number — it counts everyone you added while quietly ignoring everyone you lost. NNU nets the two so 100 adds against 80 cancellations reads as the true +20. Investors and operators use it for board reporting (net momentum, not gross bookings), for forecasting forward seat count, and for diagnosing health: if NNU flattens while acquisition spend climbs, you have a churn or downsell leak draining the seats you paid to win.
How to read it
Read NNU as net seat momentum, not a single number. Positive means you gained seats this period; negative means you lost them. Compare every month to the prior month and to plan, and always break it into its four flows — a +30 built from 50 new and 20 churned is a healthy business, while +30 from 100 new and 70 churned is a leaky bucket masked by heavy acquisition. Never read NNU without a denominator: +100 is 2% growth for a 5,000-seat company and 0.1% for a 100,000-seat one. For diagnosis, track NNU per segment (enterprise vs. SMB, by product line) to see which cohorts are net-growing and which are quietly draining.
What good looks like
Good
NNU is positive and rising month-over-month, with new customer wins and upsells comfortably outpacing churn and downgrades.
Watch
NNU is flat or small relative to your acquisition spend; churn is accelerating or downgrades are climbing without offsetting upsells.
Bad
NNU is negative or trending toward zero — you're losing seats overall despite adding new customers, signaling a churn, downsell, or product-market-fit problem.
Watch-outs
- Ignoring negative NNU. When NNU turns negative your churn and downgrades are outrunning new adds and upsells — fix retention and product value urgently, because revenue will follow the seats out the door.
- Treating NNU as revenue growth. A company can post strong NNU and still see flat or falling revenue if customers are downsizing to cheaper tiers — seat growth and dollar growth diverge, so always pair NNU with MRR or ARR.
- Double-counting across the four flows. New, Upsell, Churned, and Downsell seats are mutually exclusive; one seat cannot be both new and upsell, or both churned and downgraded, in the same period. If the components don't sum to NNU, you have a data-hygiene problem.
- Forgetting NNU is per-seat, not per-customer. A single customer who drops 10 seats and cancels contributes −10 to NNU, not −1 — seat-level tracking is essential for land-and-expand and usage-based models.
Worked example
Hypothetical
You open May with 5,000 total seats. During May you add 300 new seats, existing customers expand by 80 seats, 120 seats churn as inactive, and 40 seats are downgraded. You close at 5,220 seats, so Net New Users for May is 5,220 − 5,000 = +220 — equivalently 300 + 80 − 120 − 40 = +220.
Variants & windows
The same metric re-expressed by a mechanical transform — a trailing window, a growth rate, a per-unit scaling, or a book/segment cut. Each is computed from Net New Users above.
- Net New Contracted Users (T3M) Net new · Trailing 3-month · Contracted book
- Net New Contracted Users (TTM) Net new · Trailing 12-month · Contracted book
- Net New Live Users Net new
- Net New Live Users (T3M) Net new · Trailing 3-month
- Net New Live Users (TTM) Net new · Trailing 12-month