ARR vs. MRR: SaaS Revenue Metrics Explained

What Is ARR? Annual Recurring Revenue Explained

Annual Recurring Revenue, or ARR, is your recurring subscription revenue stretched across a full year. It's a SaaS revenue metric built for investors, board decks, and year-over-year comparisons.

ARR answers one question. If nothing changes for 12 months, how much recurring revenue lands in the business?

It ignores one-time revenue entirely. A services fee or a hardware sale doesn't belong in ARR.

Most SaaS companies report ARR first. It's the number acquirers and venture investors ask for.

A $2 million ARR company sounds bigger than a $166,667 MRR company. They're the exact same business.

That framing effect is real. It's also why ARR gets misused. It smooths out monthly volatility a lender actually cares about.

What Is MRR? Monthly Recurring Revenue Explained

Monthly Recurring Revenue, or MRR, is predictable subscription income collected in a single calendar month. It's the finer-grained sibling of ARR. Operators watch it weekly, not annually.

MRR moves fast. A big enterprise contract signed on the 3rd, a wave of cancellations on the 28th. Both show up in MRR before they ever touch a slower-moving ARR figure.

MRR reflects what's happening right now. That's why it matters most to anyone extending capital against near-term cash flow.

Revenue-based lenders fall into that group. Their repayment schedules run on monthly remittances, not annual snapshots.

ARR and MRR Formulas: How to Calculate ARR and MRR

The core formulas are simple. The mistakes happen in what you include, not in the math itself.

A company at $40,000 MRR has $480,000 in ARR. Simple multiplication.

It works fine for month-to-month subscription billing. The formula breaks down once annual contracts enter the picture.

Say a customer signs a $24,000 annual contract, paid upfront. Dividing that by 12 and calling it $2,000 in MRR is standard practice.

Multiplying that $2,000 back by 12 just returns you to $24,000. Fine, on its own.

The trouble starts when a business mixes monthly and annual contracts. Applying the shortcut inconsistently across both distorts the total.

ARR vs. MRR: When Each Metric Is the Right One to Report

Neither metric is universally correct. The right one depends on who's reading it and what decision they're making.

Report ARR when you're talking to investors, buyers, or your board about trajectory. It's the standard unit for SaaS valuation multiples. Comparing ARR year over year gives a cleaner trend line than monthly noise.

Report MRR when the audience needs to know what's happening right now. That's internal sales and customer success teams. It's also anyone underwriting capital against your near-term cash flow.

A business under 12 months old should lean on MRR internally, even while quoting ARR outside. Early-stage SaaS revenue metrics swing month to month.

An annualized figure can hide a bad quarter for a while. Eventually the number catches up.

There's a third audience worth naming: yourself, mid-fundraise or mid-application.

Founders sometimes quote ARR in a pitch deck. Then a lender's term sheet comes back sized far smaller than expected.

That's not a lowball offer. It's a different metric doing a different job.

A $1.2 million ARR company might carry only $60,000 in trailing MRR. That happens when half the ARR sits in annual contracts collected once a year, not spread monthly.

The lender still sizes off the monthly cash actually moving through the business.

Common ARR and MRR Miscalculation Mistakes

Most ARR and MRR errors aren't math errors. They're inclusion errors, and they almost always inflate the number.

• One-time setup or onboarding fees. These are real revenue, but they're not recurring. Folding them into MRR overstates the base and creates a cliff the next month when the fee doesn't repeat.
• Discounted trial or promo pricing. If a customer is paying $50 this month under a launch discount and $150 starting next month, use the $150 run-rate figure, not the discounted one, once the discount period ends.
• Annualized extrapolation of a single good month. Multiplying one unusually strong month by 12 produces an ARR figure the business can't actually sustain.
• Ignoring involuntary churn. Failed card payments and expired subscriptions quietly erode MRR. Skipping this in your churned MRR calculation makes retention look better than it is.
• Mixing currencies or billing cycles without normalizing. A quarterly invoice divided incorrectly, or foreign currency revenue left unconverted, throws off both figures.

Every one of these mistakes makes a business look stronger on paper. Underwriters see them often. They usually ask for a revenue breakdown, not just a headline number.

Involuntary churn in particular is a billing problem more than a product one. Our guide to SaaS billing best practices covers the dunning and hygiene fixes that keep failed payments from quietly eroding MRR.

Here's a worked example. A SaaS company reports $60,000 MRR for March.

Inside that number sits a $5,000 onboarding fee from a new enterprise client. It also holds $3,000 in discounted trial revenue that resets to full price in April.

Strip those out and the real recurring base is $52,000. That's the figure a lender averages into trailing MRR, not the $60,000 headline.

Report the inflated number to an underwriter and the gap shows up fast once bank statements arrive. It rarely helps the borrower's case.

How Lenders Typically Size RBF Advances Off MRR

Revenue-based financing underwriting generally starts with trailing MRR, averaged across three to six months. That average smooths out one odd month in either direction.

Lenders typically size an advance as a multiple of that average MRR. The range is commonly 1x to 3x, depending on the underwriting profile.

A business with $50,000 in trailing average MRR might see offers between $50,000 and $150,000. That's priced with a factor rate rather than an APR.

ARR rarely enters this calculation directly. It's too smoothed out to reflect monthly remittance.

This is non-dilutive capital. No equity changes hands, but the sizing math still runs off MRR.

The multiple a lender offers also leans on how much of that MRR survives delivery costs. See our comparison of gross margin vs. contribution margin for how that repayment cushion gets measured.

See our guide on the best SaaS revenue financing options for 2026 for how sizing plays out across lender types.

Growth rate matters too. A rising MRR trend line with weak retention worries underwriters more than a flat one with strong retention. That's the retention question, and it deserves its own explanation.

Gross Retention vs. Net Retention

Growth rate and MRR tell you where revenue is headed. They don't tell you how much of last year's revenue you actually kept.

That's what retention metrics are for. RBF underwriters increasingly ask for both gross and net figures, not just one.

Gross revenue retention (GRR) measures the share of recurring revenue kept from an existing base over a period. It counts only losses. Expansion revenue is excluded entirely.

Net revenue retention (NRR) starts from the same base. It adds expansion revenue back in: upsells, seat additions, upgraded plans.

The gap between the two numbers is the whole story. A company with 90% GRR and 90% NRR has zero expansion revenue. Every dollar it loses to churn stays lost.

A company with 90% GRR and 118% NRR has an expansion engine. It more than replaces what churn takes away.

That gap widens or narrows for one reason: whether expansion revenue is outrunning churn. High-churn, high-expansion businesses can post the same NRR as low-churn, low-expansion ones.

The NRR number alone hides that difference. That's exactly why underwriters ask for GRR too.

Picture two companies, both reporting 108% NRR. Company A churns 5% of revenue a year and expands the rest through upsells.

Company B churns 22% of revenue. It covers the loss with an aggressive upsell push on remaining customers.

Same headline number. Very different businesses. Company A's revenue base stays stable even if expansion slows next year.

Company B's NRR collapses the moment upsell demand softens. The underlying churn problem never went away, it just got masked.

What "Good" Retention Looks Like by ARR Stage

Retention benchmarks shift as a company grows, and lenders generally adjust their expectations accordingly.

Early-stage companies get more slack on GRR. A handful of small accounts churning swings the percentage hard.

A single lost customer can knock several points off GRR when the total customer count is small.

Stripe's payments and billing research, published through its own resources hub, has tracked ranges like these across its SaaS base.

Worth flagging plainly: no government body tracks net revenue retention. It's an internal SaaS convention.

Stripe's data is one of the more credible industry sources available. It's not a substitute for an audited financial statement. See Stripe's resources hub for its published retention research.

Why RBF Lenders Weigh Both, Not Just Growth Rate

A 40% year-over-year growth rate looks great in a pitch deck. It looks different once an underwriter learns that growth is 70% new-logo acquisition. That's covering for a leaky base that churns 25% of revenue every year.

That business has to keep spending on new customers just to stand still.

A revenue-based advance repaid as a share of top-line revenue is riskier against that kind of growth.

A smaller, slower-growing base with 95% GRR and steady expansion is the safer bet. That's the practical reason RBF underwriting generally pulls GRR and NRR alongside trailing MRR and growth rate.

Growth rate alone can't say whether revenue is durable. It might just be borrowed against next quarter's acquisition spend. See our guide to non-dilutive funding sources for SaaS for more.

Frequently Asked Questions