New MRR Calculator

New MRR is the monthly recurring revenue you win from brand new customers in a period, and it is one of the clearest signals of how well your acquisition engine is working. This calculator turns two simple inputs into that figure: the number of new customers you signed in the period and your average revenue per account, often called ARPA. It multiplies the two to give your new MRR, then annualises it by twelve so you can see the run rate the new cohort adds to your business over a full year. Sales leaders, founders and finance teams use new MRR to track top of funnel performance separately from expansion and churn, because lumping everything together hides whether growth is coming from fresh logos or from existing accounts. Reporting new MRR each month also makes forecasting easier, since you can project pipeline into a clean recurring revenue number rather than a one off bookings total. A few good practice tips will sharpen the figure. First, count only genuinely new customers, not reactivated ones or upsells to existing accounts, which belong in their own buckets. Second, use a blended ARPA that reflects the plans your new customers actually chose, not your highest tier, so the result stays realistic. Third, track new MRR alongside the cost to acquire those customers, because winning revenue cheaply matters as much as winning it at all. Used consistently, new MRR gives you a focused, comparable read on acquisition health and feeds straight into your net new MRR and net new ARR reporting, helping you see exactly where growth is being created.

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New MRR = new customers x ARPA. Annualised = new MRR x 12. Estimate only, not financial or tax advice.