Monthly recurring revenue

Monthly recurring revenue (MRR) is the total predictable revenue a business generates from all active subscriptions in a given month, normalised to a monthly amount. If a customer pays 12,000 pounds per year, that contributes 1,000 pounds to MRR. If another customer pays 200 pounds per month, that contributes 200 pounds. MRR aggregates these into a single figure that reflects the current run rate of the business.

MRR matters because it strips away the noise of one-time charges, variable usage fees, and payment timing differences. It gives you a clean, comparable number you can track month over month. When MRR is growing, the business is adding more revenue than it is losing. When MRR is flat or declining, something in the acquisition, retention, or expansion engine is underperforming.

For investors, MRR is the foundation metric. It feeds into ARR (annual recurring revenue), which is simply MRR multiplied by 12. It determines growth rate, which in turn drives valuation multiples. And when decomposed properly, it reveals whether growth is coming from healthy sources like new customer acquisition and expansion revenue, or whether it is being eroded by churn and contraction.

The simplest MRR calculation sums the monthly subscription value of every active customer. But the real power of MRR comes from decomposing it into its movement components, which reveal the dynamics underneath the headline number.

1. 1

   New MRR

   Revenue from customers who subscribed for the first time this month. This is the direct output of your acquisition engine and is closely tied to the cost per acquisition.

2. 2

   Expansion MRR

   Additional revenue from existing customers who upgraded their plan, added seats, or purchased add-ons. Expansion MRR is the most capital-efficient growth lever because it requires no acquisition spend.

3. 3

   Contraction MRR

   Revenue lost from existing customers who downgraded their plan or reduced their usage. Contraction is an early warning signal that customers are deriving less value from the product.

4. 4

   Churned MRR

   Revenue lost from customers who cancelled entirely. Churn is the most destructive force against MRR growth because it is permanent and compounds over time.

5. 5

   Reactivation MRR

   Revenue from previously churned customers who return. While not a primary growth lever, tracking reactivation separately helps you understand win-back campaign effectiveness.

The movement formula ties these together:

Ending MRR = Beginning MRR + New MRR + Expansion MRR + Reactivation MRR - Contraction MRR - Churned MRR

This decomposition is essential because two companies can have identical MRR growth rates with completely different underlying health. A company growing MRR by 5% through new sales while losing 8% to churn is in a fundamentally weaker position than one growing 3% through new sales while losing only 1% to churn, even if both report the same net growth after accounting for expansion. Monitoring net MRR churn rate reveals this dynamic by netting expansion against losses.

A metric tree decomposes MRR into its component movements and traces each movement back to the operational levers that drive it. This transforms MRR from a reporting metric into a diagnostic tool.

The first level splits MRR into its five movement components. Each component then decomposes further. New MRR is a function of new customers multiplied by their average starting price. Expansion MRR depends on the number of existing customers eligible for upsell, the upsell conversion rate, and the average expansion amount. Churned MRR decomposes into voluntary churn (customers who choose to leave) and involuntary churn (failed payments, expired cards).

This tree structure lets you diagnose problems precisely. If MRR growth is slowing, the tree tells you whether the cause is fewer new customers, smaller deal sizes, lower expansion rates, or higher churn. Each diagnosis leads to a different intervention owned by a different team.

MRR benchmarks vary significantly by company stage, market, and business model. The most useful benchmarks focus on MRR growth rate and the composition of that growth rather than the absolute MRR number.

A healthy MRR profile has new MRR and expansion MRR significantly exceeding churned MRR and contraction MRR. The SaaS Quick Ratio, which divides the sum of new and expansion MRR by the sum of churned and contraction MRR, should be above 4 for a healthy business. A ratio below 2 suggests that the business is struggling to outgrow its losses.

Growing MRR requires a balanced approach across all five movement components. Focusing exclusively on new customer acquisition while ignoring retention and expansion is the most common mistake SaaS companies make.

The metric tree approach to growing MRR starts by identifying which movement component has the largest gap between current and potential performance. If churn is high relative to benchmarks, reducing churn will have a larger impact on MRR than increasing new sales. If expansion revenue is minimal, building upsell paths may be more efficient than acquiring new customers.

KPI Tree lets you model these scenarios by connecting each MRR component to the teams and actions that influence it. Marketing owns the top of the new MRR branch. Sales owns conversion and deal size. Product owns the expansion triggers and value delivery that drive retention. Customer success owns the early-warning signals that prevent churn. When each team can see their specific node in the tree and how it connects to the headline MRR number, accountability becomes clear and interventions become precise.

1. 1

   Including one-time revenue

   Implementation fees, setup charges, and professional services revenue should not be included in MRR. They inflate the number and create false growth signals. Track them separately as non-recurring revenue.

2. 2

   Not normalising annual contracts

   If a customer pays 24,000 pounds annually, their MRR contribution is 2,000 pounds per month, not 24,000 in the month they pay. Failing to normalise creates artificial spikes and troughs that make MRR trends unreadable.

3. 3

   Counting free trials and freemium users

   MRR should only include paying customers. Including free users or trial users who have not yet converted overstates the revenue base and distorts churn calculations.

4. 4

   Ignoring contraction as a separate component

   Many teams track only new MRR and churned MRR, lumping contraction into churn. This hides an important signal: customers who downgrade are not the same as customers who leave. They need different interventions.

5. 5

   Measuring MRR without decomposing it

   Tracking only the headline MRR number without breaking it into its movement components is like tracking revenue without a profit and loss statement. You know the total but have no idea what is driving it.