Monthly Recurring Revenue (MRR)
Subscription businesses live and die by predictability. A single big sale looks great on paper, but investors and operators care more about whether revenue keeps showing up next month, and the month after that. This is the metric built specifically to answer that question.
MRR Definition
Monthly Recurring Revenue normalizes all subscription revenue into a consistent monthly figure, regardless of whether customers pay monthly, quarterly, or annually. If a customer pays $1,200 upfront for an annual plan, this metric counts that as $100 per month rather than a single lump sum – because the goal is measuring predictable, ongoing revenue, not one-time cash collection.
SaaS companies, membership platforms, and any business built around subscriptions rely on this number as their core health metric, often above revenue or profit figures that fluctuate more.
Recurring Revenue vs. One-Time Revenue
Not every dollar a company earns belongs in this calculation. Recurring revenue comes from subscriptions customers renew automatically – monthly plans, annual contracts, ongoing service fees. One-time revenue includes things like setup fees, custom implementation work, or a single product purchase, none of which repeat predictably. Mixing the two distorts the metric and makes a business look more stable (or less stable) than it actually is.
Monthly Recurring Revenue Formula
The basic formula looks like this:
MRR = Number of Paying Customers × Average Revenue Per Account (ARPA)
For a more granular calculation, especially useful for tracking growth and churn, companies often break it down as:
MRR = New MRR + Expansion MRR − Churned MRR − Contraction MRR
- New MRR: revenue added from new customers this month
- Expansion MRR: additional revenue from existing customers upgrading or buying more
- Churned MRR: revenue lost from customers who canceled
- Contraction MRR: revenue lost from customers downgrading their plan
How to Calculate MRR
- Add up all recurring subscription revenue collected in a given month.
- Convert non-monthly plans to a monthly equivalent. Divide annual plan revenue by 12; divide quarterly plan revenue by 3.
- Exclude one-time charges, such as setup fees or add-on purchases that won’t repeat.
- Sum everything together to arrive at total MRR for the month.
Example: A company has 50 customers paying $100/month, plus 20 customers paying $1,200/year.
- Monthly plan revenue: 50 × $100 = $5,000
- Annual plan revenue converted to monthly: 20 × ($1,200 ÷ 12) = 20 × $100 = $2,000
- Total MRR: $5,000 + $2,000 = $7,000
Reading the Number Correctly
A single month’s figure tells you very little on its own – the real value comes from tracking it over time. A steadily climbing trend signals healthy growth, while a flat or declining one often points to churn outpacing new sales. Breaking the number into its components (new, expansion, churned, contraction) shows exactly where growth or losses come from, which a single top-line figure can’t reveal by itself.
Common Mistakes When Calculating It
- Including one-time fees inflates the number and hides the true recurring baseline.
- Forgetting to normalize annual or quarterly plans overstates or understates monthly totals.
- Ignoring discounts and free trials can make the figure look higher than actual collected revenue supports.
- Failing to track churn separately hides declining accounts behind healthy-looking new sales.
Why MRR Matters
Investors use this figure to value subscription businesses, since predictable revenue commands higher multiples than one-time sales. Founders track it to set realistic growth targets and spot churn problems early. It also feeds directly into other key metrics, like Annual Recurring Revenue (ARR, simply MRR × 12) and customer lifetime value calculations.
Key Takeaways
- This metric normalizes subscription revenue into a consistent monthly figure, regardless of billing frequency.
- The core formula multiplies paying customers by average revenue per account.
- Breaking it into new, expansion, churned, and contraction components reveals what’s actually driving growth.
- One-time fees and non-recurring charges should never factor into the calculation.
