SaaS MRR Explained: Monthly Recurring Revenue
MRR is the foundational metric of every SaaS business. What MRR is, its four components (new, expansion, churned, net new), the milestones from $1k to $1M ARR, and how to implement accurate MRR tracking in Bubble.io without live database queries.
Monthly Recurring Revenue: The Number That Defines Your SaaS Business
MRR (Monthly Recurring Revenue) is the total predictable revenue a SaaS business earns from active subscriptions in a single month. It is calculated by summing the monthly subscription value of every active customer. MRR is the foundational metric of every SaaS business because it measures the recurring, predictable revenue that defines the SaaS model.
MRR is not the same as monthly revenue. One-time fees, setup charges, and professional services revenue are excluded. MRR represents only the recurring portion of revenue — the amount the business can expect to earn next month from its existing customer base, before accounting for new customer acquisition or churn.
Understanding What Drives Your MRR Number
New MRR
Revenue from customers who subscribed for the first time this month. Driven by acquisition: the number of new customers acquired and their average subscription value. New MRR is the most visible growth component — and the one most founders over-focus on.
Expansion MRR
Additional revenue from existing customers: plan upgrades, seat additions, and annual conversion. Expansion MRR is the most capital-efficient growth component because it requires no new customer acquisition. Businesses with NRR above 100% grow from expansion alone.
Churned MRR
Revenue lost to customer cancellations and downgrades this month. Churned MRR subtracts from net new MRR. A business with $20,000 new MRR and $15,000 churned MRR is growing at $5,000/month, not $20,000/month. Churn is the silent tax on acquisition.
Net New MRR
New MRR + Expansion MRR – Churned MRR. This is the number that determines whether your SaaS is growing or shrinking. A positive net new MRR means the business is growing. A negative net new MRR means churn is outpacing acquisition.
The Benchmarks Every SaaS Founder Targets
| MRR Milestone | What It Signals | Typical Timeline | What Gets You There |
|---|---|---|---|
| $1,000 MRR | First real revenue; proof the model works | Month 1-4 | 10 customers at $99/mo; personal sales |
| $3,000 MRR | Early traction; pattern emerging | Month 3-9 | 30 customers; first referrals; onboarding sequence |
| $5,000 MRR | Ramen profitable for most founders | Month 6-18 | 50 customers; repeatable acquisition channel |
| $10,000 MRR | Legitimate SaaS business | Month 10-24 | 100 customers; strong retention; some expansion |
| $50,000 MRR | Growth-stage company; fundraising viable | Month 18-48 | 500 customers; team; multiple channels |
| $83,000 MRR ($1M ARR) | Institutional investment benchmark | Year 2-5 | Strong NRR; efficient acquisition; proven market |
The Correct Implementation for SaaS Builders
Store MRR as a denormalised field on the Workspace record, updated by Stripe webhook handlers on every billing event. Never calculate MRR from a live query. Store a GlobalMRR record for platform-wide MRR, updated on every subscription state change. Create MonthlyMRRSnapshot records on the first of each month for trend analysis.
The Stripe webhooks that update MRR: checkout.session.completed (add the new subscription’s monthly value), customer.subscription.updated (adjust for plan changes), customer.subscription.deleted (subtract the cancelled subscription’s value), invoice.payment_succeeded (confirm active status). These four events maintain accurate real-time MRR without any live aggregation queries.
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Q: How do you calculate SaaS MRR?
Sum the monthly subscription value of every active customer. For annual subscribers: divide the annual fee by 12 to get the monthly equivalent. For usage-based plans: use the average monthly revenue over the last 3 months. MRR is a snapshot of predictable monthly revenue, not a cash flow statement.
Q: What is the difference between MRR and ARR?
ARR (Annual Recurring Revenue) is MRR multiplied by 12. ARR is used for benchmarking at scale (investors often use ARR milestones like $1M ARR). MRR is the operational metric for month-to-month management. Both measure the same thing at different time scales.
Q: What is a good MRR growth rate for SaaS?
Early-stage SaaS (under $50k MRR) should target 10-20% month-over-month MRR growth. Above 20% is exceptional. Below 5% indicates a growth problem at early stage. The growth rate typically slows as MRR grows: a $1M MRR business growing at 5% monthly is adding $50k/month, which is excellent absolute growth even at a lower percentage rate.
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