GRR Calculator

Gross Revenue Retention, or GRR, measures how much of your existing recurring revenue you hold onto, before any upsells, and this calculator works it out cleanly. Where net retention can be flattered by expansion revenue, gross retention strips that out to show the unvarnished truth about how sticky your revenue is. It takes the recurring revenue from your existing customers at the start of a period and subtracts only the losses, the contraction from downgrades and the churn from customers who leave, ignoring any expansion. Because it never adds anything back, GRR can never exceed 100 percent, and the closer it sits to that ceiling the better. A high GRR means customers stay and keep paying; a low GRR means revenue is leaking out the bottom of the bucket no matter how much you pour in the top. This calculator makes the figure plain. You enter your starting MRR and the contraction and churned MRR over the period, and it returns your GRR, the revenue lost, and the starting figure for reference. The results update as you type. Use it to assess pure retention, to diagnose whether a strong net retention is masking real churn, or to report a conservative retention figure to investors. GRR is the starting MRR minus contraction and churn, divided by the starting MRR. Reading it alongside Net Revenue Retention is especially revealing: if NRR is healthy but GRR is weak, your expansion is papering over significant churn, a fragile position that depends on constantly upselling to offset losses. Strong businesses keep GRR high, commonly above 90 percent for those serving larger customers, so that retention is solid before expansion even enters the picture. A leaky base is hard to grow, which is why GRR is the foundation that net retention is built on.

GRR = (starting MRR - contraction - churn) / starting MRR. Excludes expansion, so it never exceeds 100%. 90%+ is strong. Read alongside NRR to spot hidden churn.