The Difference Between ARR, MRR, and Revenue — and Why the Gap Matters at Tax Time
Sam's List Editorial | 2026-06-06
The Difference Between ARR, MRR, and Revenue — and Why the Gap Matters at Tax Time SaaS founders speak fluent ARR. It's how they report to investors, how they benchmark against competitors, and often how they gauge their own company's health. What ARR is not: an accounting entry. It doesn't appear on your income statement. It doesn't determine your taxable income. And using it as a proxy for either of those things — which many founders do, even subconsciously — will consistently produce the wrong answers at tax time. Here's the full picture of how these metrics relate to each other and where the gaps create real financial exposure. ARR: A Forecast, Not a Financial Statement Annual Recurring Revenue is the annualized run-rate of your current subscription contracts. If you have 100 customers each paying $2,000 per year, your ARR is $200,000. Simple. What ARR tells you: the forward-looking revenue trajectory of your subscription base, assuming no churn and no expansion. It's useful for investor conversations, for benchmarking growth rates, and for thinking about the health of your recurring revenue engine. What ARR doesn't tell you: how much revenue you recognized this period, what's on your income statement, or what you owe taxes on. ARR is a prediction about future cash flows. It exists in the present tense because you have contracts in place — but those contracts haven't been delivered yet. Revenue is recognized as the service is delivered. A company that signs $1M in new annual contracts on December 31 has dramatically increased its ARR. It has recognized essentially zero revenue from those contracts in the current fiscal year (one day of service delivered). ARR went up by $1M. Revenue went up by about $2,700. The income statement barely moved. MRR: The Monthly Equivalent with the Same Accounting Caveat Monthly Recurring Revenue is ARR divided by 12. If your ARR is $2.4M, your MRR is $200,000. Again, a go-to-market metric rather than an accounting one. MRR tracks the pulse of your subscription business in real time — a churn event drops it, a new logo increases it, an expansion moves it up incrementally. Investors and operators watch MRR closely because it reflects the current state of the business in a way that lagging financial statements don't. MRR's relationship to actual monthly revenue in your financial statements depends entirely on your accounting method and how your contracts are structured. For a monthly subscription billed in advance, cash-basis and accrual will produce similar revenue figures. For an annual contract billed upfront, the gap...
