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. ## Input **Works best with:** The metric you need — name it and get the formula, benchmark, and decision context. **Also useful:** Your numbers, if you want the formula applied on the spot. Anything supplied with the invocation itself — text after the skill name, a pasted context dump, or an appended `ARGUMENTS:` line — counts as answers already given. Use it and skip whatever it covers; don't re-ask. **Arriving empty-handed? That works too.** Ask for the metric family you're working in (revenue, retention, efficiency, capital) and scan from there. **Example invocation:** `Quick ref: burn multiple — formula, benchmark, and whether 1.7 is bad for Series B.` ## 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:** -...