ARR stands for Annual Recurring Revenue, the standard metric subscription-based software companies use to measure how much predictable revenue they generate each year. If you’ve seen this acronym in a job posting, an earnings report, or a startup pitch deck, it refers to the annualized value of all active customer subscriptions, assuming nothing changes over the next 12 months.
How ARR Is Calculated
The formula is straightforward: take your Monthly Recurring Revenue (MRR) and multiply it by 12.
ARR = MRR × 12
So if a company brings in $500,000 per month from subscriptions, its ARR is $6 million. The number represents a snapshot, not a guarantee. It tells you what the company’s revenue run rate looks like right now if every customer stayed and nothing else changed for a full year.
For companies that sell annual or multi-year contracts instead of monthly ones, ARR is calculated by annualizing the total contract value. A three-year deal worth $360,000 contributes $120,000 to ARR.
What Counts Toward ARR
ARR only includes revenue that repeats on a predictable schedule. That means subscription fees, recurring add-ons, committed usage minimums, and recurring premium support contracts all count. The key word is “recurring.” If a customer pays the same amount every billing cycle under a contract, that revenue belongs in ARR.
What gets excluded: one-time setup or implementation fees, professional services engagements, variable usage charges above a contracted minimum, pass-through taxes, and credits. Real companies draw the line in slightly different places. GitLab, for example, excludes all professional services revenue from its ARR. HubSpot includes the annual value of subscription contracts plus recurring add-ons like its Reporting or Ads tools, but excludes partner commissions. The principle is consistent even if the details vary: ARR captures the revenue a company can count on repeating.
Why ARR Matters So Much in SaaS
ARR became the go-to metric for subscription software companies because it translates a potentially messy collection of monthly payments, annual contracts, and multi-year deals into one clean number that shows how big and stable the revenue base is. It filters out the noise of month-to-month fluctuations and gives executives, boards, and investors a shared language for evaluating the business.
For internal planning, ARR anchors decisions about hiring, budgets, and growth targets. If a company’s ARR is $20 million and it wants to reach $30 million by next year, leadership can work backward to figure out how many new customers or expansions that requires.
For investors, ARR is often the foundation for valuing the entire company. Software businesses are frequently valued as a multiple of their revenue rather than their profits, because recurring revenue compounds over time and margins tend to improve at scale. A rough benchmark: a company valued at around 6 times its next-twelve-months revenue is roughly expected to grow about 20% annually over the next five years and eventually reach free cash flow margins around 30%. Higher-growth companies command higher multiples, which is why startups obsess over ARR growth rate alongside the raw number.
ARR vs. MRR
Both metrics measure recurring revenue, just on different time horizons. MRR (Monthly Recurring Revenue) is the monthly version, and it’s more sensitive to recent changes. A wave of cancellations, a pricing experiment, or a big new customer shows up in MRR almost immediately. That short feedback loop makes MRR especially useful for early-stage companies still finding product-market fit, or for any team that needs to see whether last month’s changes actually worked.
ARR smooths all of that out. It’s better suited for mature companies making longer-term decisions: annual budgets, multi-year growth targets, board presentations. Businesses that sell annual or multi-year contracts naturally gravitate toward ARR because it matches the cadence of how their customers actually commit. Companies charging month-to-month often track MRR as their primary metric and report ARR mainly for external audiences who want an annualized view.
Most subscription companies track both. They use MRR to manage operations and spot trends quickly, and ARR to communicate scale and trajectory to stakeholders.
Related Metrics Built on ARR
Once you understand ARR, you’ll encounter several related metrics that break it down further.
- Net Revenue Retention (NRR): Measures whether existing customers are spending more or less over time. It takes the revenue from a group of customers, adds any upgrades or expansions, subtracts downgrades and cancellations, and expresses the result as a percentage. An NRR above 100% means the company is growing revenue from its existing base even before adding new customers.
- Gross Revenue Retention (GRR): Similar to NRR but ignores expansion revenue entirely. It only measures how much of the starting revenue survived cancellations and downgrades. GRR can never exceed 100%, and it isolates how well a company holds onto the revenue it already has.
- New ARR: The portion of ARR added during a period from brand-new customers. This tells you how effective the sales and marketing engine is at bringing in fresh business, separate from expansions within the existing customer base.
Together, these metrics give a more complete picture than ARR alone. A company with $50 million in ARR and 120% net revenue retention is in a fundamentally different position than one with $50 million in ARR and 85% retention, even though the headline number is identical. The first company’s existing customers are growing its revenue automatically. The second is losing ground and relying entirely on new sales to stay flat.
When ARR Doesn’t Apply
ARR is specific to businesses with recurring revenue models, primarily SaaS companies selling subscriptions. It doesn’t work well for businesses where most revenue comes from one-time purchases, usage-based billing without committed minimums, or project-based consulting. Some companies with hybrid models report ARR alongside other revenue figures, but they’re careful to separate the recurring portion from everything else. If you see ARR in a company’s financials, it’s telling you specifically about the subscription engine, not the total business.