Not how much ARR changed, but why
An ARR bridge breaks the change in annual recurring revenue into its components, new, expansion, contraction, and churn, so you see why ARR moved, not merely that it did. A single net-change number hides everything that matters. The bridge reconciles starting ARR to ending ARR by laying out each force acting on it, which turns a headline into a diagnosis. It is the difference between knowing ARR grew by a million and knowing that growth came from strong new business partly eaten by rising churn, which are very different situations demanding different responses.The components it exposes
A complete ARR bridge accounts for every movement:
- New ARR from newly acquired customers. - Expansion from existing customers growing, the expansion revenue engine. - Contraction from downgrades and reduced usage. - Churn from customers lost entirely.
Summed against the starting balance, these produce the ending ARR and, along the way, reveal the health of each engine. This is the same decomposition as net new ARR, shown as a full walk rather than a single figure, and it directly feeds net revenue retention, which is the expansion-minus-losses story the bridge makes visible.
Why it drives better decisions
The ARR bridge is actionable because it points to the specific engine that needs attention. If the bridge shows healthy new business but heavy churn, the fix is retention, not more acquisition. If expansion is flat while new business carries everything, the base is underdeveloped. A net number would hide both diagnoses; the bridge surfaces them. It is essentially the MRR waterfall at an annualized scale, and which one a company uses depends on whether it manages in monthly or annual recurring revenue. Either way, decomposing the movement rather than reporting the net is what lets leadership invest in the right engine, and it is why the ARR bridge is a standard artifact in any serious recurring-revenue review. Reporting only the net change is reporting the outcome without the cause, which is exactly the information a team needs to act on.
Frequently Asked Questions
What is an ARR bridge?
An ARR bridge, also called an ARR walk or waterfall, breaks the change in ARR over a period into its parts: new ARR from new customers, expansion from existing ones, contraction from downgrades, and churn from lost customers. It reconciles starting ARR to ending ARR by showing every component of the movement, so you see why ARR changed, not merely that it did.
Why is an ARR bridge useful?
Because the net change in ARR hides the story. Two companies can add the same net ARR while one grows on healthy new business and expansion and the other barely offsets heavy churn. The bridge exposes that difference, showing which engines are driving growth and which are leaking, which is what makes it actionable rather than just descriptive.
How is an ARR bridge different from an MRR waterfall?
They are the same concept at different scales: the MRR waterfall does it monthly on recurring revenue, the ARR bridge does it on an annualized basis, often quarterly or annually. Both decompose the movement into new, expansion, contraction, and churn. The choice depends on whether the business reports and manages in MRR or ARR.
Put these metrics to work
ORM builds custom revenue forecast models that turn concepts like arr bridge into prescriptive action for your team.
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