Expansion ARR is the additional Annual Recurring Revenue generated from existing customers through up-selling, cross-selling, or usage expansions.
Serves as a vital financial metric for unit economics and investor reporting; tracking Expansion ARR helps founders manage cash runway and growth efficiency during customer success performance evaluation and net retention modeling.
Expansion ARR measures the growth of recurring revenue from within the existing customer base. It is a key indicator of customer satisfaction, product scalability, and pricing alignment. Strong Expansion ARR is the engine behind negative churn, allowing startups to grow overall revenues even if they lose some accounts.
By offering higher pricing tiers, selling add-on features, cross-selling complementary products, or charging based on volume usage.
Expansion ARR has a very low acquisition cost (typically under 20% of new CAC), making it highly profitable for growth.
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