Calculate and project annual recurring revenue growth rate with new ARR, expansion, contraction, and churn components charted over time.
Enter a starting ARR balance plus new ARR, expansion ARR, contraction ARR, and churned ARR for each period, and the calculator rolls them into an ARR bridge: it adds new business and expansion, subtracts contraction and churn, and reports the resulting ending ARR and period-over-period growth rate, then charts each component's contribution across the periods you enter. The surprise for most users: a healthy-looking headline growth rate can still hide rising churn, because new ARR alone drives net growth even as retained-customer revenue erodes underneath it.
A concrete input and expected output from the current implementation.
Input
Beginning ARR: $1,000,000; New ARR: $150,000; Expansion ARR: $80,000; Contraction ARR: $20,000; Churned ARR: $60,000
Expected output
Ending ARR: $1,150,000; Net New ARR: $150,000; ARR Growth Rate: 15.0%
Ending ARR = 1,000,000 + 150,000 + 80,000 - 20,000 - 60,000 = 1,150,000, a $150,000 increase on the $1,000,000 base, which is 15% growth for the period.
Ending ARR is computed as beginning ARR plus new ARR plus expansion ARR minus contraction ARR minus churned ARR. The growth rate is the percentage change from beginning to ending ARR for that period. Net new ARR (new plus expansion minus contraction minus churn) is broken out separately so you can see how much of any growth came from new logos versus the existing base.
Enter a sequence of periods and the tool carries each period's ending ARR forward as the next period's beginning ARR, stacking new, expansion, contraction, and churn as separate series on a chart. This makes it possible to see whether growth is decelerating, whether contraction is creeping up, or whether a churn spike coincides with a specific period rather than reading one blended growth number.
Churned ARR is revenue lost because a customer cancelled entirely; contraction ARR is revenue lost because an existing customer downgraded but is still active. The calculator keeps them as separate line items so you can tell whether you're losing customers outright or just losing wallet share within accounts you keep.
Not directly. NRR is (beginning ARR + expansion - contraction - churn) / beginning ARR, excluding new ARR, while this calculator's headline growth rate includes new ARR. You can derive NRR from the same component figures the tool displays by leaving new ARR out of the numerator yourself.
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