Monthly Recurring Revenue — MRR — is the normalised monthly value of all active subscriptions. It strips out the noise of annual deals, monthly variability, and one-time payments to give you one clean number: how much predictable revenue does this business generate per month?
MRR is the single metric investors, acquirers, and serious operators use to assess a subscription business. It underpins valuation multiples, determines LTV, feeds into CAC payback calculations, and is the leading indicator of whether your growth is real or just a blip.
The MRR Formula
The basic formula is simple. The discipline is in applying it correctly — especially for annual and multi-year subscribers.
If a customer pays £588/year, their monthly contribution to MRR is £588 ÷ 12 = £49/month. Never count the full £588 as revenue in the month they paid — that distorts your MRR and cash flow picture.
MRR vs ARR: When to Use Each
Annual Recurring Revenue (ARR) is simply MRR × 12. Both numbers describe the same underlying business — the question is which framing is more useful.
| Use MRR when... | Use ARR when... |
|---|---|
| Tracking monthly growth momentum | Talking to investors (feels bigger, standard convention) |
| Measuring churn and expansion in-month | Comparing to enterprise SaaS benchmarks |
| Setting monthly targets and OKRs | Calculating valuation multiples (ARR × multiple) |
| Running a small/indie subscription product | Operating a sales-led or enterprise business |
How Churn Destroys MRR (The Maths Most Founders Ignore)
Churn is the percentage of your MRR lost each month because customers cancel. It is the most dangerous number in a subscription business — because its damage compounds silently in the background while you celebrate new sales.
The benchmark for healthy SaaS churn is under 2% monthly (under 22% annualised for SMB SaaS). Enterprise SaaS should target under 1% monthly. If your churn is 5%+, fixing it is more valuable than any growth initiative — because growth on a leaky bucket doesn't accumulate.
The 5 Components of MRR Movement
Your net MRR change each month is not just new sales minus cancellations. There are five components to track, and three of them are often invisible to founders who don't measure closely.
MRR from brand new customers who didn't subscribe before. This is the number most founders track first.
MRR gained from existing customers upgrading their plan, purchasing add-ons, or increasing usage. Often the highest-ROI source of MRR growth because the customer is already acquired.
MRR from previously churned customers who re-subscribe. Small but valuable — shows your product has pull-back power.
MRR lost from existing customers downgrading their plan. This is negative expansion — and it often signals dissatisfaction before churn.
MRR lost from cancellations. The most visible form of MRR loss, but contraction can be equally dangerous and is more often ignored.
▸ MODEL YOUR MRR
Project your SaaS revenue with the BoringRiches calculator
Adjust customer growth rate, churn, and ARPU — see what your MRR looks like in 12 and 24 months.
Browse All Businesses →SaaS MRR Benchmarks at Every Stage
Where should your MRR be, and what growth rate is healthy? These benchmarks are drawn from Indie Hackers, Baremetrics, and SaaStr data.
| Stage | MRR Range | Healthy Growth | Acceptable Churn |
|---|---|---|---|
| Pre-revenue / launch | $0 → $1K | Any positive growth | N/A |
| Early traction | $1K → $10K | 15–25% MoM | <5% monthly |
| Growth | $10K → $50K | 10–20% MoM | <3% monthly |
| Scale | $50K → $200K | 5–15% MoM | <2% monthly |
| Established | $200K+ | 3–8% MoM | <1.5% monthly |
These are benchmarks, not guarantees. Some of the most successful indie SaaS products grew slowly — 5-10% MoM — but maintained excellent retention and built durable, sustainable businesses. Speed matters less than compounding.
Frequently Asked Questions
What is the difference between MRR and revenue?
Revenue is the total cash received in a month. MRR is the normalised monthly value of active subscriptions. They differ when you collect annual payments upfront (which boosts cash revenue but shouldn't inflate MRR) or have one-time fees (professional services, setup fees). Always separate recurring from non-recurring revenue.
How do you calculate MRR for annual subscribers?
Divide their annual payment by 12. If someone pays £600/year, their contribution to MRR is £50/month. This is the standard approach — it normalises different billing cadences so you can compare apples to apples.
What is Net MRR Growth Rate?
Net MRR Growth Rate = (New MRR + Expansion MRR + Reactivation MRR - Churned MRR - Contraction MRR) ÷ Previous Month's MRR × 100. It tells you the actual rate at which your recurring revenue is growing, after all gains and losses.
What is Net Revenue Retention (NRR) and why does it matter?
NRR measures how much of last year's MRR you still have this year from the same cohort of customers — including expansion. NRR above 100% means you're growing from existing customers alone (expansion exceeds churn). Top SaaS companies hit 120-140% NRR. Below 80% means you're losing most of what you win.
At what MRR should I consider a SaaS business validated?
$1K MRR is the first meaningful milestone — it proves people will pay repeatedly. $10K MRR is a real business. $50K MRR ($600K ARR) is a fundable business. $83K MRR ($1M ARR) is the benchmark most serious SaaS operators target for year 3.
▸ MODEL YOUR MRR
Project your SaaS revenue with the BoringRiches calculator
Adjust customer growth rate, churn, and ARPU — see what your MRR looks like in 12 and 24 months.
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