SaaS Annual Recurring Revenue (ARR)

Frequently Asked Questions

How is ARR calculated?

ARR = MRR × 12. Or sum annual contract values for new bookings. Excludes one-time fees, professional services, usage overages. Some companies report "implied ARR" projecting current MRR forward - clarify which definition is used.

How is "new ARR" different from "growth"?

New ARR = newly booked annual revenue (gross). Growth = New ARR + Expansion - Churn = Net New ARR. New ARR shows sales team performance. Net new shows business health. Public SaaS reports both.

Why is ARR more useful than revenue?

ARR shows the run-rate of recurring business - what you'd earn if no new customers signed up and no existing ones changed. Revenue includes one-time items that can mask underlying SaaS health. Investors and acquirers value ARR multiples (5-15x) over revenue.

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How This Calculator Works

This tool annualizes recurring revenue and projects where it lands. It converts MRR to ARR (MRR × 12), then walks the bridge: starting ARR, plus new ARR booked, minus churned ARR, plus expansion from existing customers, equals projected ARR. It also derives Net Revenue Retention (NRR) as 100 − churn% + expansion%, and the resulting ARR growth rate. This is a revenue-movement model - the "waterfall" every SaaS board reviews.

NRR Is the Headline Number

Net Revenue Retention measures what happens to a cohort of existing customers before any new sales: do upsells more than offset churn? NRR > 100% means the existing base grows on its own - the holy grail, because the company expands even if it stops acquiring. Benchmarks: best-in-class SaaS 120%+, healthy 105–115%, below 100% is a leaky bucket where new sales just replace lost revenue. NRR is the single metric most predictive of long-term SaaS value.

ARR vs Recognized Revenue - Not the Same

ARR is a run-rate snapshot (current recurring revenue × 12), not GAAP revenue. It excludes one-time fees, services, and usage overages, and it is forward-looking, not earned. Do not reconcile ARR to your income statement - they answer different questions. Also keep bookings (contracts signed), billings (invoiced), and ARR (active run-rate) distinct; conflating them is the most common reporting error in SaaS.

Gross vs Net Retention

Gross revenue retention (churn only, no expansion) caps at 100% and exposes the true leak - healthy is 90%+ for SMB, 95%+ for enterprise.

Net retention can mask churn behind a few big upsells. Always read both: NRR of 110% with GRR of 80% means heavy churn papered over by expansion - fragile.

This calculator's NRR uses period rates; make sure churn and expansion are measured over the same window (both monthly or both annual).

Common Mistakes

Mixing logo churn and revenue churn. Losing 5% of customers who are your smallest accounts is not 5% revenue churn.

Counting one-time/services revenue in ARR - inflates the run-rate and overstates valuation.

Annualizing a spiky month. One big deal × 12 is not ARR; smooth or use end-of-period active contracts.

Ignoring downgrades (contraction) as separate from full churn - both reduce NRR.

SaaS Annual Recurring Revenue (ARR)

Frequently Asked Questions

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