ARR Calculator

MRR x 12 and when that formula breaks down

The standard ARR formula is straightforward: take your current MRR and multiply by twelve. For a pure subscription SaaS business with monthly or annual billing, this gives you a clean annualized view of recurring revenue. This arr calculator uses that conversion as the baseline because it's what most B2B SaaS companies need for their board deck and investor conversations.

But the formula breaks down in several common scenarios. Multi-year contracts with built-in price escalators create ARR that changes at each renewal step — the current MRR x 12 will understate what the contract is actually worth over its full term. Usage-based billing creates MRR that fluctuates month to month, so your arr calculation depends heavily on which month you choose as the baseline. Seasonal businesses (yes, even some SaaS companies have seasonal patterns) produce MRR that varies by quarter, making any single-month annualization misleading.

Handling multi-year contracts and usage billing in ARR

For multi-year contracts, the standard practice is to recognize ARR based on the annual value of the contract in its current year, not the total contract value. A three-year deal worth $300K total at $80K/$100K/$120K per year should show $80K in year-one ARR, not $100K (the average) or $300K (the TCV). For usage-based models, use a trailing three-month average of MRR as your annualization base — it smooths out volatility without lagging too far behind the current run rate.

ARR for board reporting and fundraising

ARR is the language of SaaS fundraising. Valuation multiples are applied to ARR — a company at $5M ARR growing 100% year-over-year commands a very different multiple than one at $20M ARR growing 30%. When investors ask "what's your ARR?" they're sizing the business for a multiple, so precision matters. Inflating your arr by including one-time revenue, services revenue, or contracted-but-not-yet-live deals will come back to bite you in due diligence.

For board reporting, present ARR alongside the components that explain its movement: new ARR from new logos, expansion ARR from existing customers, and churned ARR from lost accounts. This decomposition is the ARR equivalent of net new MRR analysis, just at the annual scale. Boards want to see whether growth is coming from new business or expansion, and whether churn is accelerating or decelerating. This arr calculator gives you the starting point; pair it with NRR for the retention side of the story.

ARR growth rate and what it signals

ARR growth rate — the year-over-year percentage change in annual recurring revenue — is the primary growth metric for SaaS companies past $1M ARR. Below $1M, month-over-month MRR growth is more useful because the numbers are small enough that annual comparisons are noisy. Above $1M, ARR growth rate is the metric that determines your valuation multiple, your ability to raise, and your competitive position in the market.

Benchmark ranges for B2B SaaS in 2025-2026: under $5M ARR, top-quartile companies grow 100%+ year-over-year. At $5M-$20M ARR, top quartile is 60-100%. At $20M-$50M, it's 40-60%. Above $50M, 30%+ year-over-year is considered strong. These numbers compress at scale because the base gets larger, but the absolute dollar growth should be accelerating even as the percentage decelerates — that's what investors call "efficient growth at scale."

Pairing ARR with the Rule of 40

The Rule of 40 says that a healthy SaaS company's ARR growth rate plus its profit margin should sum to at least 40%. A company growing ARR at 60% with -20% profit margins hits the threshold. So does a company growing at 20% with 20% profit margins. The Rule of 40 matters because it forces you to think about growth and efficiency together rather than optimizing one at the expense of the other.

Use this arr calculator to get your growth rate, then check it against the Rule of 40 with your current margin. If you're below the line, you need to either accelerate growth (which usually means investing more in customer acquisition) or improve margins (which usually means reducing churn and increasing customer lifetime value). Both paths lead to better unit economics; the right one depends on your stage and market position.

For more on how daydream helps B2B SaaS companies grow ARR efficiently, see the daydream method or explore the full SaaS calculator suite.