GRR calculator. Does your base hold without upsells?

A GRR calculator works out gross revenue retention by taking your starting ARR and subtracting churned and contracted revenue, then dividing back by the start. It shows what share of recurring revenue you keep from the existing base before any expansion. Because it excludes upsells, it is the cleanest read on whether your product holds onto revenue on its own.

Subtract churned ARR and contraction ARR from your starting ARR, then divide by the starting ARR and multiply by 100. Start at $1M, lose $80,000 to churn and $40,000 to downgrades and your GRR is 88%. GRR can never exceed 100% because it ignores expansion.

GRR measures only the revenue you keep, capped at 100%, while NRR adds expansion and can exceed 100%. NRR tells you whether the base grows, GRR tells you whether it leaks. A wide gap between a high NRR and a lower GRR means expansion is covering a real churn problem.

For B2B SaaS, above 90% annual GRR is healthy and above 95% is excellent. SMB-focused products tend to run lower because small customers churn more, while enterprise products often clear 95%. The trend matters as much as the level, since a falling GRR signals a product or fit problem.

Because it shows the durability of the revenue underneath the growth. Investors read GRR to see how much of the base survives without sales effort. Strong GRR makes a high NRR credible and a high valuation multiple defensible, while weak GRR marks both down regardless of how fast the company is growing.