ARR Net New Bookings Calculator

Build your ARR bridge in seconds — compute net new bookings, gross retention, and net revenue retention from all four ARR components.

ARR from new logos closed this period
Upsells + seat expansion in existing accounts
ARR from customers who fully cancelled
ARR lost from downgrades (not cancellations)
Net New ARR
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New + Expansion − Churn − Contraction
Gross Inflow ARR
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Total ARR Lost
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Gross Retention
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Net Retention (NRR)
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Expansion Ratio
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Churn + Contraction
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Ad Space

What Is Net New ARR?

Net New ARR is the single most important growth metric for any SaaS company. It equals New Customer ARR + Expansion ARR − Churned ARR − Contraction ARR. A positive net new ARR means the business is growing; a negative number means the company is shrinking in revenue terms, even if it still has customers. The ARR bridge — breaking net new into all four components — is now standard in board reporting and fundraising decks. According to Bessemer Venture Partners' 2024 Cloud benchmarks, the median net new ARR growth rate for Series B SaaS companies is 80–120% year-over-year. Last updated: May 2026.

Gross Retention vs Net Revenue Retention

Gross Revenue Retention (GRR) measures how much of your starting ARR you kept, excluding any expansion. GRR is capped at 100% because expansion is not counted. GRR = (Starting ARR − Churn − Contraction) / Starting ARR. Net Revenue Retention (NRR) adds expansion and can exceed 100%. NRR = (Starting ARR + Expansion − Churn − Contraction) / Starting ARR. Top-quartile SaaS companies maintain NRR above 120% — meaning their existing customers grow revenue faster than new customers churn. OpenView Partners' 2024 benchmarks show that companies with NRR > 120% grow 2× faster than those below 100% NRR, even with identical new logo sales.

How to Use This Calculator

Enter the four ARR movement components for a single period (month, quarter, or year): new customer ARR from logos closed, expansion ARR from upsells and seat additions in existing accounts, churned ARR from full cancellations, and contraction ARR from downgrades. You also need the starting ARR for the period to calculate GRR and NRR — use the total ARR at the beginning of the period as your denominator. The calculator outputs net new ARR, gross retention, NRR, and expansion ratio (expansion / churn). Use the expansion ratio to quickly see if your expansion motion is outpacing churn — a ratio above 2 is strong.