SaaS Expansion ARR by Cohort Calculator
Expansion ARR by cohort shows whether new customers grow faster or slower than older ones. Top-quartile SaaS adds 30%+ expansion per cohort year over the first three years. This tool models a 3-year cohort expansion path with industry benchmarks.
Why Cohort Expansion Matters More Than Blended NRR
Blended NRR mixes new logos (high growth) with mature accounts (slower). Cohort view exposes whether each vintage is healthier than the last — a leading indicator of long-term retention quality. Public SaaS files cohort-level retention in S-1s for this reason.
How Top SaaS Drives Expansion
Consumption-based pricing (Snowflake, Datadog, Twilio) naturally expands as customer usage grows. Seat-based SaaS expands through (a) more seats as customer grows, (b) tier upgrades, (c) add-on modules. Companies running all three layers — usage + seats + modules — hit highest expansion rates.
Red Flags in Cohort Data
Three warnings: (1) Year-2 expansion lower than Year-1 by more than 5 points = onboarding gap that pushes to expansion ceiling fast. (2) Year-3 contraction = product-market fit shifting. (3) Cohorts launched in different years showing different patterns = market or pricing change disrupting fit.
Source: Bessemer Cloud 100 2026, OpenView Annual SaaS Benchmarks 2025. Last updated: May 2026.