ARR up for Renewal tracks the value of customer contracts that are ending in a period, and need to be renewed. Most SaaS companies either have customers pay month-to-month, or have them sign long term contracts (typically 1 year). For customers that sign longer term contracts, when the contract expires they have to be renewed for another term.

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ARR up for Renewal is the denominator when calculating renewal retention. The numerator is the amount renewed: the ARR from the new contracts signed by customers with expiring contracts. Renewal contracts can be flat (the same amount as the prior year), or have contraction or expansion. Customers can also churn at renewal, a key metric for companies to keep their eye on.