Expansion MRR Calculator

Track upsell, cross-sell, and seat expansion revenue alongside churn — see your Net Dollar Retention (NDR) and true MRR growth components.

Starting MRR ($)

New MRR (month) ($) Revenue from brand-new customers this month

Expansion MRR ($) Upsells + cross-sells + seat expansion from existing customers

Contraction MRR ($) Downgrades from existing customers (not churn)

Churned MRR ($) Revenue lost from cancelled customers

Reactivation MRR ($) Churned customers who re-subscribed

Net Dollar Retention (NDR)

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Ending MRR

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this month

MRR Growth

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vs last month

Expansion %

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of starting MRR

Churn %

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of starting MRR

MRR Component	Amount	% of Starting MRR

What Is Expansion MRR?

Expansion MRR is the additional monthly recurring revenue generated from your existing customer base through upsells, cross-sells, seat additions, usage overages, or tier upgrades. It excludes revenue from new customers. High expansion MRR is the hallmark of product-market fit in B2B SaaS — it means customers are finding enough value to spend more. According to OpenView Partners' 2026 SaaS Benchmarks Report, best-in-class SaaS companies generate 20–35% of total MRR growth from expansion, significantly reducing reliance on expensive new customer acquisition.

Net Dollar Retention (NDR) — The Key Metric

NDR (also called Net Revenue Retention, NRR) measures the percentage of MRR retained from your existing customer cohort, including expansion and contraction. Formula: NDR = (Starting MRR + Expansion − Contraction − Churn) ÷ Starting MRR × 100. An NDR above 100% means expansion more than offsets churn — existing customers are growing your revenue without any new customer acquisition. This is the "negative churn" effect prized by SaaS investors. Benchmarks from Bessemer Venture Partners 2026: Top-quartile public SaaS NDR = 120%+. Median = 110%. Below 90% = significant retention problem. Source: bvp.com State of the Cloud 2026.

MRR Waterfall — The Standard Framework

The MRR waterfall breaks total MRR change into 6 components: New MRR (brand new customers), Expansion MRR (existing customer upgrades), Contraction MRR (downgrades, negative), Churned MRR (cancellations, negative), Reactivation MRR (returned churned customers), and Net New MRR (the sum). This framework is the industry standard for SaaS board reporting and is used by Stripe, Salesforce, Hubspot, and virtually all VC-backed SaaS companies. The calculator outputs the full waterfall with percentages for benchmarking.

How to Increase Expansion MRR

The most reliable expansion motions are: (1) Usage-based or seat-based pricing that grows automatically as customers scale. (2) Structured upsell sequences triggered by product usage milestones (e.g., hitting a feature limit or usage threshold). (3) Customer Success-driven QBRs that identify upgrade opportunities. (4) In-app upgrade prompts at the moment of value realization. (5) Annual plan incentives that convert monthly customers to annual contracts at higher rates. Companies with NDR above 120% typically have at least two of these five motions operating simultaneously.