Annual Recurring Revenue

What it measures

The sum of every active recurring subscription's normalized monthly value, multiplied by 12. One-time setup fees, professional services, and usage overages are excluded — only contracted revenue you can reliably expect to repeat each year.

Why it matters

You report ARR to investors and boards because it normalizes the subscription business to an annual scale. A company at $500K MRR is running at $6M ARR — one number that says "this business has $6M of predictable annual revenue." ARR also lets you compare across contract lengths: a customer on a 3-year deal and one paying month-to-month both land in the same run-rate number. Operators use it to track bookings targets and communicate the scale of the business without ambiguity.

How to read it

Read ARR as the annualized run-rate: if your MRR today is $X and nothing changes, you'll earn $X × 12 over the next 12 months. Track it monthly and compare to prior month, plan, and prior year. Growing ARR means new customers and expansion are outpacing churn and downgrades; flat ARR often masks a churn problem hidden behind fresh bookings. Always decompose ARR movement into its components — new, upsell, downsell, churn — to see *why* it moved, not just that it did.

What good looks like

Watch-outs

• Treating ARR as a forecast. It answers "if we flatten today's MRR to a year, what do we get?" not "what will actual revenue be in 12 months." Churn, pricing, and new bookings all shift the real outlook.
• Confusing ARR with bookings or TCV. A 3-year, $36K deal is $1K MRR = $12K ARR — booking it as $36K ARR overstates this year's run-rate by 3×.
• Including non-recurring revenue. Setup fees, professional services, and usage overages aren't recurring; folding them in inflates ARR and breaks comparability against the next period.
• Ignoring ARR quality. $1M of ARR from one customer is far riskier than $1M across 100 accounts — always pair ARR with logo count or customer concentration.

Worked example