Contraction revenue is the recurring revenue you lose when customers stay but spend less, and this calculator works it out along with your contraction rate. Not all revenue loss comes from customers leaving entirely. Existing customers can shrink their spending without churning, by downgrading to a cheaper plan, reducing the number of seats or users, or dropping add-on products. That reduction in recurring revenue is contraction, and it is an important and often overlooked drag on growth, because it eats into the revenue base quietly, without the obvious signal of a cancellation. Contraction is the mirror image of expansion: where expansion lifts net retention above 100 percent, contraction pulls it down, and a business with high contraction must work harder on new sales and upsells just to stay flat. This calculator quantifies it. You enter your contraction MRR for the period, the revenue lost from downgrades and reduced usage, and your starting MRR, and it returns the contraction MRR, the contraction rate as a percentage of your starting base, and the figures for reference. The results update as you type. Use it to track this quieter form of revenue loss, to diagnose pressure on net retention, or to set targets for reducing downgrades. The contraction rate is the contraction MRR divided by your starting MRR. Watching contraction alongside expansion and churn gives the full picture of how your existing revenue base is moving. A rising contraction rate is a warning that customers are finding less value or facing budget pressure, and addressing it, through better adoption, pricing and packaging, protects the base that all your growth is built on. Because contracted customers have not left, they are often easier to win back than churned ones, so tackling contraction can be a high-return focus for customer success teams.
Contraction rate = contraction MRR / starting MRR. Contraction is revenue lost from downgrades and reduced usage, without the customer leaving. It pulls net retention down.
The contraction rate divides the contraction MRR, the recurring revenue lost from downgrades and reduced usage by customers who stayed, by the starting MRR. The base after contraction is the starting MRR minus the contraction. Unlike churn, contraction comes from customers who remain but spend less.
With $3,000 of contraction MRR from downgrades against a starting MRR of $100,000, the contraction rate is 3 percent. The recurring revenue base after contraction is $97,000, the revenue retained from customers who stayed but reduced their spending over the period.
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