What it means
Traditional revenue is earned and gone; each period starts again from zero. Subscription revenue is different: a customer who signed up last year will, unless they cancel, pay again this year and next.
ARR captures that installed base. It is not an accounting figure and does not appear in the financial statements; it is a management and investor metric that normalises all recurring contracts to a twelve-month value regardless of billing frequency.
Monthly subscriptions are multiplied by twelve; multi-year contracts are divided by their term; quarterly billing is multiplied by four. The value of ARR lies in its decomposition.
Beginning ARR plus new ARR from new customers, plus expansion ARR from existing customers buying more, minus contraction ARR from customers buying less, minus churned ARR from customers who leave, gives ending ARR. Each component tells a story: a company adding $5 million of new ARR while losing $4 million to churn is on a treadmill; one adding $3 million with $500,000 of churn and $1 million of expansion is compounding.
Net revenue retention, the ratio of ending ARR from a cohort of customers to their beginning ARR, summarises the existing base's growth, and figures above 100% mean the business would grow even if it never won another customer. ARR also drives valuation.
Investors value subscription companies as a multiple of ARR, adjusted for growth rate and retention, because ARR is a better guide to future revenue than trailing revenue. A company that ends the year with ARR 50% above its reported revenue for the year is expected to report substantially higher revenue next year, and the multiple reflects that.
Definitions must be disciplined. Including one-off implementation fees, usage-based revenue that fluctuates, or contracts that have been signed but not yet started inflates ARR and misleads everyone, including management.
Most investors expect ARR to include only contracted, recurring subscription value from live customers, and they will test the definition in due diligence.
In practice
Real-world examples.
Example
A company selling annual software subscriptions at $12,000 with 300 customers has ARR of $3.6 million; a customer on a three-year $45,000 contract contributes $15,000.
Example
A gym chain with 8,000 members paying $60 a month reports ARR of $5.76 million and tracks monthly churn as the key driver.
Example
A cloud infrastructure company reports contracted ARR of $40 million separately from usage revenue of $15 million, because the usage varies month to month.
Think of it
“ARR is your annual subscription revenue run rate-MRR projected across a full year.
Formula
Calculation
ARR = Sum of annualised recurring subscription values of all active customers
Monthly Recurring Revenue (MRR) x 12 = ARR
Ending ARR = Beginning ARR + New ARR + Expansion ARR minus Contraction ARR minus Churned ARR
Net Revenue Retention = (Beginning ARR + Expansion minus Contraction minus Churn) / Beginning ARR x 100%
Worked example. A software company starts the year with ARR of $10,000,000 from 500 customers. During the year:
- New customers: 150, adding $3,600,000 of ARR
- Existing customers upgrading or adding seats: $1,500,000 of expansion ARR
- Existing customers downgrading: $400,000 of contraction ARR
- Customers cancelling: 40, removing $900,000 of churned ARR
Ending ARR = $10,000,000 + $3,600,000 + $1,500,000 minus $400,000 minus $900,000 = $13,800,000 (38% growth)
Net revenue retention = ($10,000,000 + $1,500,000 minus $400,000 minus $900,000) / $10,000,000 = 102%
Gross revenue retention (ignoring expansion) = ($10,000,000 minus $400,000 minus $900,000) / $10,000,000 = 87%
Customer churn = 40 / 500 = 8%
Recognised revenue for the year, which depends on when each contract started, might be around $12,000,000. The ending ARR of $13,800,000 tells investors that next year's revenue will be at least that, before any new sales, if retention holds.
Valuation: at a market multiple of 8 times ARR for companies growing 30% to 40% with retention above 100%, the company is worth about $110 million.Case study
Seen in the real world.
A software start-up presented investors with ARR of $6 million and 60% growth. Due diligence found the figure included $900,000 of one-off implementation fees annualised as if recurring, $700,000 from contracts signed but not yet live, and $400,000 from customers who had given notice to cancel. Cleaned up, ARR was $4 million, growth was 35%, and net revenue retention, which the company had not calculated, was 88%: the existing base was shrinking.
The investors reduced their valuation by half and made the round conditional on the company reporting a standard ARR definition monthly. The founders, who had believed their own figure, later said the discipline of the clean metric changed how they ran the company: they stopped celebrating signed contracts and started managing churn, which fell by a third the following year.
Watch out
Common mistakes.
- Including non-recurring fees, unstarted contracts or usage revenue in ARR. The metric is only useful if it means what it says.
- Reporting ARR growth without its components. Growth from new customers that masks high churn is a warning, not a success.
- Confusing ARR with revenue. ARR is a forward-looking run rate; revenue is what was recognised in the period.
Questions
People also ask.
What is the difference between ARR and MRR?
MRR is the monthly equivalent, used by businesses with monthly billing and short sales cycles. ARR is MRR times twelve, used where contracts are annual or longer.
What is a good net revenue retention rate?
Above 100% means the existing base is growing. Leading enterprise software companies report 110% to 130%; consumer subscriptions are usually below 100%.
Why do investors value companies on ARR?
Because recurring revenue is more predictable than one-off sales, and ARR at year end is a better guide to next year's revenue than this year's reported figure.
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