SaaS Metrics

Subscription MRR Calculator

What Is This Calculator?

Monthly Recurring Revenue (MRR) is the normalized monthly revenue from all active subscriptions. It is the single most important metric for any subscription business — SaaS, membership sites, subscription boxes, or any model with recurring billing. MRR is not simply total monthly revenue; it specifically counts predictable, recurring subscription revenue and normalizes annual plans to their monthly equivalent. Understanding MRR requires breaking it into components: New MRR (revenue from new customers), Expansion MRR (upgrades and add-ons from existing customers), Churned MRR (revenue lost from cancellations), and Contraction MRR (revenue lost from downgrades). Net New MRR — the sum of new plus expansion minus churn minus contraction — tells you whether your recurring revenue base is growing or shrinking. The best SaaS companies achieve Net Revenue Retention above 100%, meaning their existing customer base generates more revenue over time even without acquiring a single new customer. This is the magic of the subscription model when executed well. Bessemer Venture Partners' Cloud Index tracks public SaaS companies and shows that the median NRR is 110-115%, meaning the average public SaaS company grows revenue from its existing customer base by 10-15% annually without acquiring a single new customer. Companies below 100% NRR are fighting an uphill battle where they must constantly acquire new customers just to replace the revenue walking out the door. This calculator breaks MRR into its components so you can identify whether your growth is coming from healthy new customer acquisition and expansion, or whether it is being undermined by churn you may not be measuring accurately.

How to Use This Calculator

Enter Starting MRR

Add Growth Components

Enter Loss Components

Key Concepts

Net Revenue Retention (NRR)

Revenue from existing customers this month divided by their revenue last month, expressed as a percentage. NRR above 100% means expansion exceeds churn. Top-performing SaaS companies (Snowflake, Twilio, Datadog) achieve 120-170% NRR. The median public SaaS company runs 110-120%.

Gross Revenue Churn

Total MRR lost (cancellations + downgrades) as a percentage of starting MRR. Target below 3% monthly for SMB-focused SaaS, below 1% monthly for enterprise SaaS. Above 5% monthly is unsustainable — you are losing over half your revenue base annually.

ARR (Annual Recurring Revenue)

MRR multiplied by 12. This is the standard metric for SaaS valuations. SaaS companies are typically valued at 5-15x ARR depending on growth rate, NRR, and profitability. A company with $1M ARR growing 100% YoY might command a $10M-$15M valuation.

Quick Ratio (SaaS)

(New MRR + Expansion MRR) divided by (Churned MRR + Contraction MRR). A Quick Ratio above 4 indicates very healthy growth. Between 2-4 is good. Below 2 means churn is consuming too much of your growth. Mamoon Hamid of Kleiner Perkins popularized this metric.

Expansion Revenue

Additional revenue from existing customers through upsells, cross-sells, seat additions, and usage overages. The cheapest revenue you can generate because there is no customer acquisition cost. The best SaaS companies generate 30-40% of new MRR from expansion.

Expert Insights

Track MRR components weekly in a spreadsheet or dashboard, not just monthly. A sudden spike in contraction MRR in week 2 gives you 2-3 weeks to investigate and respond. Discovering it at month-end gives you zero time.

Frequently Asked Questions

MRR counts only predictable, recurring subscription revenue and normalizes all plans to a monthly basis. Total revenue includes one-time fees, setup charges, professional services, and other non-recurring income. A company might have $100K in monthly revenue but only $70K in MRR. Investors and valuations focus on MRR because it is predictable.

Divide the annual payment by 12 and add the monthly equivalent to MRR. A customer paying $1,200/year contributes $100/month to MRR from the start of their subscription. Do not recognize the full $1,200 in the month it is collected — that distorts your growth metrics.

For early-stage SaaS (under $1M ARR), 15-20% month-over-month is excellent and top-quartile. At $1M-$10M ARR, 10-15% MoM is strong. Above $10M ARR, 5-8% MoM is good. Y Combinator considers 5-7% weekly growth the benchmark for startups in their program, which equates to roughly 20-30% monthly.

The bar has risen significantly. In 2024-2025, most Series A investors expect $80K-$200K MRR (roughly $1M-$2.5M ARR) with 15%+ month-over-month growth, NRR above 100%, and a clear path to $10M ARR. Some investors will go lower for exceptional teams or markets, but the median Series A company is at $1.5M-$2M ARR.

Three strategies: (1) Build expansion triggers into your pricing — usage-based pricing, seat-based pricing, and premium tiers that customers naturally grow into. (2) Reduce churn through better onboarding (the first 30 days determine retention), proactive customer success, and product improvements driven by churn feedback. (3) Launch complementary add-ons that solve adjacent problems for your existing customers.

Results are estimates for educational purposes only. Actual amounts may vary based on your specific financial situation, market conditions, and other factors. This calculator does not constitute financial advice.