Expansion ARR
Growth
Usage
Industry:
SaaS
Short Definition
Expansion ARR is the increase in Annual Recurring Revenue (ARR) from existing customers during a period, driven by upsells, cross-sells, seat/license additions, usage tier upgrades, and contractual price increases. It captures growth within the installed base (not new logos).
Why it matters for Investors
Growth from the base: Shows how much growth is coming from existing customers (adoption, breadth, stickiness).
Capital efficiency: Expansion is often cheaper than acquiring new logos.
Retention quality: Expansion lifts Net Revenue Retention and offsets Contraction/Churn.
Formula
Where 'n' is the number of existing customers who increased their recurring spend during the period.
Practical Considerations:
Scope: Existing customers only — new logos are New Logo ARR.
Timing: Count when effective (go-live/start date); signed-not-live sits in CARR (Contracted ARR — signed for a future date) until it starts.
Include (Committed & Recurring): Tier upgrades (upsell), new paid modules (cross-sell), more seats/units or higher minimums (add-on), contracted usage-tier upgrades, contractual price escalators (e.g., CPI).
Exclude: Uncommitted/overage usage and one-off credits — these affect revenue, not ARR.
Special cases: Same product/tier & quantity → price ↑ = Expansion, price ↓ = Contraction. Ramps (pre-scheduled step-ups in the contract) → count the step-up on its effective date.
Reporting: Show gross Expansion; report Contraction and Logo Churn separately — the net appears in Net New ARR.
Worked Example
Starting ARR (Feb 28): $1,200,000
Contract log (March)
Account | Event | Effective by Mar 31? | Account ARR @ Mar-31 ($) | Δ ARR in March ($) | Category | Notes |
|---|---|---|---|---|---|---|
A | New logo, annual $24,000, starts Mar 4 | Yes | $24,000 | +$24,000 | New Logo | Not Expansion ARR |
B | New logo, annual $36,000, starts Apr 1 | No | $0 | $0 | Booking / CARR | Not effective in March |
C | Upsell on existing (+$18,000) effective Mar 15 (prior $50,000) | Yes | $68,000 ($50k→$68k) | +$18,000 | Expansion | Counts in Expansion ARR |
D | Cancellation effective Mar 31 (prior $40,000) | Yes | $0 | −$40,000 | Churn | Not Expansion ARR |
E | Year-2 ramp $20,000 → $35,000 on Mar 1 | Yes | $35,000 | +$15,000 | Expansion (ramp) | Counts in Expansion ARR |
Expansion ARR (March): $33,000 = $18,000 (C) + $15,000 (E)
ARR Bridge (March):
New Logo ARR: +$24,000 (A)
Expansion ARR: +$33,000 (C + E)
Contraction: $0
Churn: −$40,000 (D)
Net New ARR: +$17,000 → Ending ARR (Mar 31): $1,200,000 + $17,000 = $1,217,000
Notes:
Expansion counts only increases from existing customers that became effective in March (C, E).
New logos (A, B) are not Expansion; D is Churn, not Expansion.
Ramped step-ups (E) count on the effective date as Expansion (ramp).
Best Practices
Break it down: Track why expansion happened — more seats, higher plan (upsell), new module (cross-sell), or price step-up (escalator).
Show next to churn: Report Gross Expansion alongside Churn so the net effect is clear.
Cohorts help: Group customers by start month/year (vintage), size, or product to spot patterns.
Pair with Net Revenue Retention: Expansion drives net revenue retention—report them together.
FAQs
Expansion vs. New Logo ARR?
Expansion = existing customers. New Logo = new customers.Expansion vs. Contraction ARR?
Expansion = increases from existing accounts. Contraction = decreases from existing accounts (e.g., downgrades, fewer seats/units or lower minimums, or price-only decreases). (Going to $0 is Logo Churn, not Contraction.)Does usage count?
Only if it’s contractually recurring (e.g., a higher committed minimum or a contracted tier step). Pure pay-as-you-go overage with no higher commitment ≠ ARR.Can Expansion ARR be negative?
No. Reductions are reported as Contraction ARR (or Logo Churn ARR if to $0).Why separate Expansion from Net New ARR?
To see where growth comes from (base vs. new). Net New ARR = New Logo ARR + Expansion ARR − Contraction ARR − Logo Churn ARR.Are reactivations Expansion?
No. A previously churned customer returning is typically tracked as Reactivation/Resurrected ARR (or New Logo ARR per policy), not Expansion.
Related Metrics
Commonly mistaken for:
Cross-sell ARR (component of Expansion ARR)
Expansion Bookings (signed but not effective)
New Logo ARR (ARR from new customers)
Source of:
Components: