finance-metrics-quickref

## Purpose Quick reference for any SaaS finance metric without deep teaching. Use this when you need a fast formula lookup, benchmark check, or decision framework reminder. For detailed explanations, calculations, and examples, see the related deep-dive skills. This is not a teaching tool—it's a cheat sheet optimized for speed. Scan, find, apply. ## Key Concepts ### Metric Categories Metrics are organized into four families: 1. **Revenue & Growth** — Top-line money (revenue, ARPU, ARPA, MRR/ARR, churn, NRR, expansion) 2. **Unit Economics** — Customer-level profitability (CAC, LTV, payback, margins) 3. **Capital Efficiency** — Cash management (burn rate, runway, OpEx, net income) 4. **Efficiency Ratios** — Growth vs. profitability balance (Rule of 40, magic number) ### When to Use This Skill **Use this when:** - You need a quick formula or benchmark - You're preparing for a board meeting or investor call - You're evaluating a decision and need to check which metrics matter - You want to identify red flags quickly **Don't use this when:** - You need detailed calculation guidance (use `saas-revenue-growth-metrics` or `saas-economics-efficiency-metrics`) - You're learning these metrics for the first time (start with deep-dive skills) - You need examples and common pitfalls (covered in related skills) --- ## Application ### All Metrics Reference Table | **Metric** | **Formula** | **What It Measures** | **Good Benchmark** | **Red Flag** | |------------|-------------|--...