Net New ARR measures changes in Total ARR from one period to the next.
If you’ve ever seen an ARR waterfall, this is what goes on between the lines.
Sounds simple in theory. But in practice, there are a thousand little feet kicking under the surface. It’s not just a single number, but a combination of different revenue flows that provide insight into how well a company is growing.

That’s why I brought in an expert to help with today’s post - Bobby Pinero - founder and CEO of Equals. After experiencing the pains of being the first finance and data hire at Intercom, wrestling messy transaction data from Stripe, ERPs, and Data warehouses, he started Equals to solve the ARR problem. Take it away, Bobby:

Net New ARR is the pulse of your business. You can tell where you are gaining or losing ground by pinpointing the ways that ARR shifts from one period to the next.
Mechanically speaking, Net New ARR is made up of different categories of added and lost revenue:
Net New ARR = Gross New ARR + Expansion + Contraction + Churn + Restart
Added Revenue
Gross new:
Started a new subscription
Expansion:
Upgraded to a higher plan
Increased seat count
Bought an additional product or feature
Restart:
Restarted a previously cancelled subscription
Lost Revenue
Contraction:
Downgraded to a cheaper plan
Reduced seat count
Removed add-ons
Churn:
Cancelled subscription
Downgraded to free plan
Gross New
Gross New is crucial in the ARR Build for two reasons:
When a customer’s subscription starts determines what cohort they are a part of. (Cohort is a fancy word for a “group” based on similar characteristics.)
Gross New makes up the majority of Net New ARR for early stage companies. As the business grows, the balance shifts, and a higher concentration of Net New ARR comes from Expansion ARR from existing customers. Knowing this mix goes a LONG way in determining the accuracy of your forecasts.
Gross New is a measure of business from new customers walking in the door. The pace and size at which they walk through the door matters, as it dictates how hard the other levers within Net New ARR have to work to make the money printer go brrrr.
Ways to change Gross New:
Increase lead volume
Improve funnel conversion
Increase the starting price point
Expansion and Contraction
Everything outside of Gross New ARR is influenced by existing customers.