This Series A Retention Calculator measures customer retention and gross revenue retention over a selected period. It helps teams separate the share of customers kept from the share of recurring revenue preserved after churn and downgrades.
Enter opening customers and recurring revenue, then record customer losses, churned revenue, and contraction. The calculator reports both retention views and a monthly-equivalent revenue retention rate for cross-period comparison. Expansion revenue is excluded so the revenue result remains gross retention.
1. Enter opening customers
Use the active customer count at the start of the period.
2. Record customer losses
Count customers that fully canceled during the period.
3. Enter opening revenue
Use recurring revenue from the same opening customer base.
4. Add churn and contraction
Separate full revenue churn from downgrades or reduced usage.
5. Set the period
Enter months and review customer retention and gross revenue retention.
Gross revenue retention excludes expansion and new-customer revenue. Opening and loss values must refer to the same cohort and period.
Gross revenue retention is the percentage of opening recurring revenue retained before expansion.
Net revenue retention is a different metric because it includes expansion from existing customers.
Given
Calculation
Customer retention = 965 / 1,000 = 96.50%. GRR = ($500,000 - $18,000 - $7,000) / $500,000 = 95.00%.
Result
Gross revenue retention = 95.00%.
Revenue retention is lower than customer retention because lost and downgraded accounts carried more than the average revenue share.
Gross retention isolates revenue preserved from the opening base. Expansion belongs in net revenue retention.
Customer retention and gross revenue retention cannot exceed 100% in this model. Net revenue retention can exceed 100% when expansion is included.
Enter the recurring revenue reduction as contraction, while keeping the customer unless the account fully cancels.
No. Retention follows the opening cohort and excludes customers acquired during the period.
The difference reveals whether larger or smaller accounts are disproportionately churning or contracting.