Saas Economics Efficiency Metrics

Purpose

Determine whether your SaaS business model is fundamentally viable and capital-efficient. Use this to calculate unit economics, assess profitability, manage cash runway, and decide when to scale vs. optimize. Essential for fundraising, board reporting, and making smart investment trade-offs.

This is not a finance reporting tool, it's a framework for PMs to understand whether the business can sustain growth, when to prioritize efficiency over growth, and which investments have positive returns.

Input

Works best with: The question you're answering (can we scale? raise? extend runway?) or the metrics you want evaluated. Also useful: Your numbers, CAC, gross margin, burn, runway, magic number, partial data is workable.

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. Use it as a reference: read the metric sections relevant to your stage and decision.

Example invocation: Are we efficient enough to scale? CAC $9K, gross margin 72%, burn multiple 2.1, magic number 0.6.

Key Concepts

Unit Economics Family

Metrics that measure profitability at the customer level, the foundation of sustainable SaaS.

Gross Margin, Percentage of revenue remaining after direct costs (COGS).

• Why PMs care: A feature that generates $1M revenue at 80% margin is worth far more than $1M at 30% margin. Margin determines which features to prioritize.
• Formula: (Revenue - COGS) / Revenue × 100
• COGS includes: Hosting, infrastructure, payment processing, customer onboarding costs
• Benchmark: SaaS 70-85% good; <60% concerning