Gross Revenue Retention & Core Churn Calculator

SaaS Investor Metrics: Why VCs Demand GRR in Addition to NRR

While Net Revenue Retention (NRR) can be artificially inflated by a few massive customer upsells, Gross Revenue Retention (GRR) cannot be faked:

• GRR Caps at 100%: By strictly excluding all expansion and upsell revenue, GRR measures pure baseline customer retention.

• The 'Masked Churn' Risk: If a company has 120% NRR but only 70% GRR, it means the product is heavily churning normal users while extracting all growth from a small subset of whales—a dangerous structural fragility.

How to Use This Calculator

Enter your Starting Cohort Recurring Revenue ( at Period Start) (e.g. 120000), Contraction / Downgrade Losses from Cohort () (e.g. 6000), Churned / Cancelled Losses from Cohort () (e.g. 4800), Expansion / Upsell Revenue () [for NRR Comparison] (e.g. 25000), and Target Customer Segment Benchmark — choose from Enterprise B2B SaaS (Top-Decile Benchmark GRR ≥ 90% - 95%), Mid-Market SaaS (Benchmark GRR ≥ 85% - 90%), SMB / Self-Serve SaaS (Benchmark GRR ≥ 75% - 85%). Results update instantly as you type — adjust any value to compare scenarios.

The Formula

Gross Revenue Retention (GRR / GDR) & Core Churn equations: Revenue Leakage = Contraction Downgrade MRR + Churned Cancelled MRR Retained Revenue = Starting Cohort Revenue - Total Revenue Leakage Revenue Retention (GRR \%) = ((Starting Revenue - Contraction - Churn) / (Starting Revenue)) × 100\% (Max 100\%) Revenue Churn Rate (\%) = 100\% - GRR (\%) Revenue Retention (NRR \%) = ((Starting + Expansion - Contraction - Churn) / (Starting)) × 100\%

Worked Example

For example, evaluating a SaaS company with a 120,000 starting cohort that experiences 6,000 in downgrades, 4,800 in cancellations (10,800 total leakage), and 25,000 in expansion upsells: Gross Retained Revenue is . The Gross Revenue Retention (GRR) is \ (9.0% Gross Churn), while the NRR is 111.83%.

Understanding Your Result

Revenue forecasts are only as reliable as their assumptions. Bottom-up forecasting (units × price) is more accurate than top-down (% of market) for early-stage businesses. Build three scenarios: conservative (50th percentile), base (expected), and optimistic (90th percentile). If your conservative case does not reach break-even, the business model needs revision before scaling investment. Venture-backed companies typically target 3× annual revenue growth in early years; mature SaaS businesses target 20–40% annual growth.