ARPnU Growth Rate
The month-over-month percentage change in average revenue per new user — whether each new cohort is landing at higher or lower value.
◆ Percentage
Formula
Built from
What it measures
The rate at which the average revenue contribution of each new customer cohort is changing period to period, computed as (current ARPnU − prior ARPnU) ÷ prior ARPnU. It does not measure absolute new revenue or how many customers you landed — only how the per-new-customer value itself is moving.
Why it matters
You track ARPnU Growth Rate because it decouples acquisition velocity from revenue velocity. You can add 20% more new users month over month, but if ARPnU is shrinking — because you're discounting or chasing low-value deals — your new revenue isn't growing nearly as fast as your customer count implies. It's also the cleanest read on whether your pricing and packaging strategy is sticking: are new cohorts landing in premium tiers, are price increases holding, are you moving upmarket? Operators use it to judge whether sales and CS are winning higher-value logos and whether the latest pricing change actually changed customer behavior.
How to read it
A positive rate means each new cohort is worth more on average than the last — pricing, packaging, or customer quality is improving. A negative rate means the opposite: more discounting, smaller deals, or a lower-value segment. Always pair it with new user count and CAC to read the full picture. A 10% ARPnU gain alongside 5% new-user growth means new revenue is growing roughly 15% (directionally, since the base shifts). But a 10% ARPnU decline against 20% new-user growth means you're buying volume at the expense of value — fine only if CAC payback still works.
What good looks like
Good
ARPnU is growing month over month, reflecting price increases that hold, upsell into premium tiers, or improved packaging for new cohorts.
Watch
ARPnU growth is slowing or erratic, hinting at pricing fatigue, more discounting, or a drift toward smaller-deal cohorts.
Bad
ARPnU is shrinking consistently, signaling heavy discounting, downward price pressure, or a shift toward lower-value customers.
Watch-outs
- Treating ARPnU Growth Rate as revenue growth. A 20% ARPnU gain is not 20% new-revenue growth if new-user count is also moving — read the two together, never substitute one for the other, or you'll overstate momentum.
- Ignoring cohort-mix bias. If this month's new users skew enterprise instead of SMB, ARPnU rises on its own — that's a deal-mix shift, not a pricing win. Segment ARPnU by customer type or geography to isolate real strategy changes.
- Confusing it with ARPU Growth Rate. ARPU spans all users and blends expansion and churn; ARPnU Growth Rate covers only customers landed this period, isolating the quality of your acquisition funnel.
- Not adjusting for one-time deals or seasonality. A single large land can spike ARPnU; when that logo isn't repeated, the next period looks like a crash. Use rolling averages or exclude outliers before comparing.
Worked example
Hypothetical
You acquire 100 new users in January generating $50K in revenue, so ARPnU(Jan) = $50K ÷ 100 = $500. In February you acquire 120 new users generating $66K, so ARPnU(Feb) = $66K ÷ 120 = $550. ARPnU Growth Rate = ($550 − $500) ÷ $500 = 10%. Each February cohort customer is worth $50 more on average — likely larger deals, higher prices, or more enterprise logos.