How To Calculate MRR

Monthly recurring revenue, almost always shortened to MRR, is the portion of a company's income that repeats every month by contract. It is the central metric of any subscription business, because it is predictable in a way that one-off sales never are, and predictability is what makes a business valuable.

The defining rule is that MRR counts contracts, not cash. If a customer pays twelve hundred pounds up front for a year, that money arrives in one lump, but the MRR it contributes is one hundred pounds, because that is the rate at which the service is being consumed. Spreading the payment across the twelve months it covers is what makes the number comparable between customers on different billing cycles.

This is why an annual prepayment can be dangerous to read naively. A month with several annual renewals will show a spike in cash and no change at all in MRR, while the following month may show almost no cash and a perfectly healthy MRR. Cash flow and MRR answer different questions, and confusing them is one of the most common early-stage reporting errors.

Calculating MRR starts by grouping recurring contracts into their billing period. Monthly subscriptions contribute their monthly price directly. Annual subscriptions contribute their annual price divided by twelve. Quarterly subscriptions contribute their quarterly price divided by three. Once every contract is expressed as a monthly rate, the figures simply add up.

On top of that base there are movements in both directions. Expansion revenue arrives when an existing customer buys more: extra seats, a higher tier, an add-on module. It increases MRR without adding a new customer, which is why it is tracked separately from new business. Contraction is the mirror image, where a customer downgrades and pays less.

Churn is the revenue lost when customers cancel outright. Net new MRR is expansion minus contraction minus churn, and it is the single most diagnostic figure in a subscription business. A company can add a hundred new customers a month and still shrink if churn is larger than the combination of new and expansion revenue.

The related figure, annual recurring revenue or ARR, is simply MRR multiplied by twelve. The two are the same measurement on different timescales, and analysts use ARR when comparing against annual budgets and MRR when looking at month-to-month momentum. Reporting both is standard practice.

Revenue per account, sometimes called ARPA, is MRR divided by the number of paying accounts. It tells you whether growth is coming from many small customers or a few large ones, and it moves the moment you change your pricing or your target market. A rising MRR with a falling ARPA means you are adding volume but selling less per customer.

There are several things that must not be counted as MRR. One-off setup fees, professional services, hardware, usage overages that are not expected to repeat and any revenue that has no contractual commitment behind it all belong outside the figure. Mixing them in inflates MRR and makes it useless as a predictor.

It is also worth being strict about the difference between committed and variable revenue. A customer on a usage-based plan who spends wildly different amounts each month is not really recurring revenue in the contractual sense. Many companies split out a separate usage revenue line rather than pretending it is MRR.

Finally, MRR should be measured at a consistent point in the month. Because cancellations, upgrades and new signups land on different days, a figure taken on the first and a figure taken on the last day of the same month will differ. Pick a convention, usually the end of the month, and apply it every time so the trend line means something.