The SaaS Metrics Cheat Sheet

Every SaaS founder eventually needs the same set of numbers, and they always seem to be scattered across a dozen articles when a board meeting is looming. This saas metrics cheat sheet puts the core definitions and formulas in one place, grouped by what they measure, so you can look up any metric in seconds and get the math right the first time.

Keep this page bookmarked. Each entry gives you the plain-English definition, the formula, and a quick note on what a healthy value looks like. Where a metric deserves a deeper treatment, we link to the full guide.

Recurring Revenue Metrics

These are the foundation — the normalized value of your subscription engine.

• MRR (Monthly Recurring Revenue): the normalized monthly value of all active subscriptions. MRR = Active subscribers × Average revenue per account. Annual plans are divided by 12; one-time fees are excluded. See the full MRR guide.
• ARR (Annual Recurring Revenue): the annualized view. ARR = MRR × 12. Used most by companies selling annual contracts.
• ARPA / ARPU: average revenue per account (or user). ARPA = Total MRR ÷ Number of accounts. Rising ARPA usually signals healthy upmarket movement.
• Net new MRR: the month's true growth. Net new MRR = New + Expansion − Contraction − Churn.

Retention and Churn Metrics

These tell you whether you are keeping the revenue you worked to win.

• Customer churn rate: the share of customers who cancel. Customer churn = Customers lost ÷ Customers at start of period. Most SaaS companies run 3–8% monthly for SMB, lower for enterprise.
• Revenue churn rate: the share of MRR lost to cancellations and downgrades. Gross revenue churn = (Churned + Contraction MRR) ÷ Starting MRR. Read how churn rate works.
• NRR (Net Revenue Retention): whether your existing base grows on its own. NRR = (Starting MRR + Expansion − Contraction − Churn) ÷ Starting MRR. Above 100% is the goal; see the NRR benchmarks.
• GRR (Gross Revenue Retention): retention before any expansion. GRR = (Starting MRR − Contraction − Churn) ÷ Starting MRR. It caps at 100% and exposes the raw leak.

Unit Economics Metrics

These decide whether growth is profitable or just expensive.

• CAC (Customer Acquisition Cost): what it costs to win a customer. CAC = Total sales & marketing spend ÷ New customers acquired. Deep dive: customer acquisition cost for SaaS.
• LTV (Customer Lifetime Value): the gross profit a customer delivers over their lifetime. LTV = (ARPA × Gross margin) ÷ Customer churn rate. Full method: calculating LTV in SaaS.
• LTV:CAC ratio: return on each acquisition dollar. LTV:CAC = LTV ÷ CAC. Around 3:1 is healthy; see what a good ratio looks like.
• CAC payback period: months to recover acquisition cost. CAC payback = CAC ÷ (ARPA × Gross margin). Under 12 months is the common target — details here.

Growth and Efficiency Metrics

These summarize whether your growth engine is outrunning its losses.

• SaaS quick ratio: growth versus losses in one number. Quick ratio = (New + Expansion MRR) ÷ (Contraction + Churn MRR). A reading of 4 or higher is strong — see the quick ratio explainer.
• MRR growth rate: month-over-month momentum. Growth rate = (This month MRR − Last month MRR) ÷ Last month MRR. Early-stage SaaS often targets 10–20% monthly.
• Expansion MRR share: how much growth comes from existing customers. High expansion is the most capital-efficient growth there is.
• Activation rate: the share of signups that reach first value. Not a formula so much as a definition of your own aha moment, but it is the leading indicator behind almost every other number here.

Benchmarks at a Glance

Formulas tell you how to calculate a metric; benchmarks tell you whether the answer is good. Treat these as broad ranges, not hard rules — they shift with company stage, price point, and customer segment.

• Monthly customer churn:roughly 3–8% for SMB self-serve, 1–2% or lower for enterprise. Annual churn below 10% is excellent.
• Net revenue retention:100% is the dividing line; best-in-class SaaS runs 110–130%.
• Gross margin:70–85% is typical for software; much lower usually means heavy infrastructure or services costs.
• LTV:CAC ratio: around 3:1 is healthy; far above it can mean you are underinvesting in growth.
• CAC payback: under 6 months for self-serve, under 12 for SMB, up to 24 for enterprise.
• SaaS quick ratio: 4 or higher signals efficient growth; below 1 means you are shrinking.

Which Metrics Matter at Each Stage

You do not need all of these at once. The metrics that deserve your attention change as the company grows.

• Pre-product-market fit: activation rate and early churn. Nothing else matters until customers stick.
• Early growth: MRR growth rate, CAC payback, and the quick ratio, to prove the engine works and scales efficiently.
• Scaling: net revenue retention, LTV:CAC, and expansion share, which show whether growth compounds without ever-rising spend.
• Fundraising or board reporting:ARR, NRR, and the efficiency ratios — the numbers investors underwrite valuations on.

How to Read the Cheat Sheet Together

Individual metrics lie; the relationships between them tell the truth. A few rules of thumb for reading these numbers as a system:

• High MRR growth with a falling quick ratio means churn is quietly catching up to you.
• A great LTV:CAC ratio with a long payback period means the economics work but cash is tight — watch runway.
• NRR above 100% means you could stop acquiring entirely and still grow; it is the strongest single signal of product-market fit.

For a narrative walkthrough rather than a reference, our overview of the core SaaS metrics and the rundown of key metrics founders track put these numbers in context.

Keeping the Numbers Current

A cheat sheet is only useful if the underlying numbers are accurate, and recalculating all of this from raw Stripe data every month is where most founders slip. StripeReport connects to Stripe with a read-only key and computes MRR, ARR, churn, NRR, expansion, and the ratios above automatically, then sends them to you in a daily email or Slack report. You get the whole cheat sheet, filled in with your real data, without touching a spreadsheet.

Key Takeaways

• Group your metrics into four families: recurring revenue, retention, unit economics, and growth efficiency.
• Memorize the formulas that matter — MRR, churn, NRR, CAC, LTV, payback, and the quick ratio cover almost every board question.
• Read metrics as a system; the relationships between them reveal what any single number hides.
• Automate the calculations so the reference always reflects your current reality, not last quarter's spreadsheet.