Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Result
Expansion rate of starting ARR
8.0%
Expansion share of total new ARR
37.5%
Total net new ARR
$640,000
Base growth multiplier from expansion alone
1.080
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How to use this
- 1Enter starting arr ($).
- 2Enter expansion arr (period) ($).
- 3Enter new business arr (period) ($).
- 4Read your expansion rate of starting arr on the right — it updates as you type.
- 5Hit Share to keep the scenario or send it to someone.
About this calculator
Expansion revenue rate isolates upsell, cross-sell, and seat/usage growth from your existing customer base as a share of either starting ARR or total new ARR added in a period. A business with a strong expansion motion can grow meaningfully even with modest new-logo velocity, because compounding upsells across a large existing base often outpaces one-off new deals. Product-led and usage-based companies frequently see expansion contribute 30-50%+ of net new ARR once the base matures, while pure outbound-sales enterprise motions often sit lower unless they've built a deliberate account-growth or customer-success-led-growth motion. Track this rate over time as a leading indicator: a rising expansion rate paired with flat or declining new-logo bookings often means the market is saturating and future growth increasingly depends on land-and-expand rather than net-new acquisition, which changes how you should staff and compensate CS versus sales.
Worked example
Using the values the calculator loads with:
Inputs
- Starting ARR: 3000000 $
- Expansion ARR (period): 240000 $
- New business ARR (period): 400000 $
Results
- Expansion rate of starting ARR: 8.0%
- Expansion share of total new ARR: 37.5%
- Total net new ARR: $640,000
- Base growth multiplier from expansion alone: 1.08
What each field means
Inputs
- Starting ARR ($)
- The starting arr used in the calculation, measured in $. Starts at 3000000 $ so you have a working example on load.
- Expansion ARR (period) ($)
- The expansion arr (period) used in the calculation, measured in $. Starts at 240000 $ so you have a working example on load.
- New business ARR (period) ($)
- The new business arr (period) used in the calculation, measured in $. Starts at 400000 $ so you have a working example on load.
Results
- Expansion rate of starting ARR
- Returned as a percentage and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Expansion share of total new ARR
- Returned as a percentage. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Total net new ARR
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Base growth multiplier from expansion alone
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
What's a good expansion revenue rate?
As a share of starting ARR, 10-20% annually is solid; 20%+ is excellent and typical of usage-based or seat-growth products with strong land-and-expand motion. As a share of total new ARR growth, anything over 30% means expansion is becoming a primary growth engine, not just a bonus.
Why track this separately from NRR?
NRR nets expansion against churn and contraction into one number, which is great for retention health but hides how much gross expansion you're actually generating. A company can have mediocre NRR (heavy churn) alongside a genuinely strong expansion motion — this metric surfaces that nuance.
How do I grow expansion revenue rate deliberately?
The reliable levers are usage-based or seat-based pricing that naturally grows with customer success, proactive CS-led account reviews that surface upsell opportunities, and packaging tiers that make upgrading an obvious next step rather than a renegotiation. Passive upsell (waiting for customers to ask) rarely moves this number much.
Does expansion revenue rate matter for SMB products?
Less so — SMB accounts are individually small and often single-seat, so there's limited expansion surface area per account. SMB growth usually depends more heavily on new-logo velocity and volume; expansion becomes the dominant lever mainly in mid-market and enterprise segments.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Related tools
Net Revenue Retention (NRR) Calculator
See how much revenue your existing customers generate a year later, expansion included.
Seat Expansion Revenue Calculator
Project how much additional ARR comes from customers adding seats over time.
ARR Bridge Calculator
Break your ARR change down into new, expansion, contraction, and churn.
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Expansion Revenue Rate Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/expansion-revenue-rate
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/expansion-revenue-rate" target="_blank" rel="noopener">Expansion Revenue Rate Calculator — RevenueLab</a> (2026).</p>
Source: [Expansion Revenue Rate Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/expansion-revenue-rate) (2026).