SaaS Metrics & Subscription Growth Calculator
SaaS health starts with monthly recurring revenue and how much of it you keep. Enter MRR, new MRR, churned MRR, and expansion MRR to see ARR, net new MRR, and month-over-month growth.
SaaS Metrics
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How the SaaS Metrics Works
Recurring revenue is the backbone of any subscription business. This calculator multiplies MRR by 12 to show annual run rate, then combines new, expansion, and churned MRR into net new MRR. Dividing net new MRR by starting MRR gives month-over-month growth, the fastest read on momentum. Churn is the silent drag: a business adding 10,000 dollars of new MRR while losing 8,000 barely grows. Tracking expansion separately from new revenue shows whether existing customers are upgrading, which is cheaper growth than acquisition. Net revenue retention combines all three movements and is the headline metric investors ask about. A quick ratio above 4 is strong. The engine here focuses on MRR, ARR, net new, and MoM growth; for NRR and quick ratio, divide the components as described in the FAQs. Keep churn and expansion in the same units and period for a clean comparison. A useful benchmark: net revenue retention above 100% means existing customers alone would keep revenue flat or growing, even with zero new sales.
Formula Used
ARR = MRR x 12; Net New MRR = New + Expansion - Churn; MoM Growth = Net New MRR / MRR
MRR $50,000, new MRR $8,000, churned MRR $2,000, expansion MRR $3,000. Net new MRR = $9,000, ARR = $600,000, month-over-month growth = 18%.
When to Use This Calculator
- Reporting recurring revenue to investors or the board.
- Diagnosing whether growth comes from new logos or upsells.
- Setting a monthly churn-reduction target.
Common Mistakes
- Confusing MRR with cash collected: Annual prepayments inflate cash but should be recognized as MRR across the term.
- Netting expansion into new MRR: Separating them reveals whether growth comes from new logos or existing account upgrades.
- Ignoring churn in projections: Gross adds look impressive, but net new MRR is what actually grows the business.
Frequently Asked Questions
What are the core metrics every SaaS company should track?
MRR, ARR, gross and net churn, expansion revenue, customer acquisition cost, and lifetime value. Together they show growth, efficiency, and retention. Net revenue retention and the quick ratio summarize how durable that growth is.
How do you calculate net revenue retention (NRR)?
Start with MRR at the beginning of the period, add expansion, subtract contraction and churn, then divide by starting MRR. An NRR above 100% means existing customers spend more over time even before new sales, which is a strong efficiency signal.
What is a good SaaS Quick Ratio?
The quick ratio is new plus expansion MRR divided by churned plus contraction MRR. Above 4 is excellent, 2–4 is healthy, and below 2 signals growth is leaking. Track it monthly alongside NRR to catch retention problems early.
What is a healthy quick ratio for SaaS companies?
The quick ratio divides new plus expansion MRR by churned plus contraction MRR. Above 4 is excellent, 2 to 4 is healthy, and below 2 means growth is leaking to churn. Track it monthly alongside net revenue retention.
How do you calculate net revenue retention (NRR)?
Start with beginning MRR, add expansion, subtract contraction and churn, then divide by beginning MRR. Above 100% means existing customers grow revenue on their own, which is the clearest sign that retention and upsell are working.
How This Page Is Reviewed
Written by the Recapflow Editorial Team and last reviewed . Every formula and worked example is cross-checked against the live calculator engine and a hand-worked example. This page is educational and does not replace professional financial, tax, or legal advice.