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Unit Economics

Understanding the per-unit profitability that drives business viability

⬢ 層級 2領域
+$20k-
薪資影響
4 個月
學習時長
中等
難度
10
職業
一覽

Unit economics is the foundation of profitable growth. For product managers, founders, and finance leaders, it means understanding Customer Acquisition Cost (CAC), Lifetime Value (LTV), payback period, and contribution margin. A PM or Director-level role in growth/finance typically earns $25k-$50k more with this skill, and it's non-negotiable for fundraising, board meetings, and scaling decisions.

什麼是 Unit Economics

Unit economics analyzes revenue and costs at the individual customer or transaction level. Key metrics include Customer Acquisition Cost (CAC), Lifetime Value (LTV), payback period, and LTV:CAC ratio. These metrics determine whether a business can scale profitably. A company growing fast with broken unit economics is burning cash toward failure. Understanding LTV:CAC ratios, contribution margins, and payback periods is essential for product managers, growth leaders, and anyone in SaaS or marketplace businesses.

🔧 工具與生態
CACLTVContribution MarginCohort AnalysisPayback PeriodGross MarginMixpanelAmplitudeStripeProfitWell

💰 各地區薪資

地區初級中級高級
USA$75,000$110,000$155,000
UK£58,000£85,000£120,000
EU€50,000€75,000€105,000
CANADACA$68,000CA$100,000CA$140,000

❓ 常見問題

What's the difference between CAC and LTV?
CAC is how much you spend to acquire one customer (marketing + sales costs ÷ new customers). LTV is the total profit you expect from that customer over their lifetime. The ratio LTV:CAC tells you if growth is profitable, above 3:1 is healthy for SaaS.
Why does payback period matter?
Payback period is how many months until you recover the CAC from that customer's profit. If it's 24 months but customers churn after 18 months, you never break even. Short payback (under 12 months) means faster cash flow and less fundraising pressure.
How do I calculate contribution margin?
Contribution margin = (Revenue - Variable Costs) ÷ Revenue. Variable costs include COGS, payment processing, and delivery. Fixed costs (salaries, rent) come out separately. This tells you how much each sale contributes to covering fixed costs and profit.
Should I use blended or channel-specific CAC?
Always use channel-specific. Blended CAC hides the truth, one profitable channel subsidizing a losing one. Google might have 2:1 LTV:CAC while TikTok has 1.5:1, but blending them masks both problems.
How do I project LTV without enough customer data?
Use industry benchmarks as guardrails, but base projections on your actual retention curve. If you have 6 months of data, model churn conservatively. Don't project 3-year LTV from 90-day cohorts; stick to what you can defend to investors.
What if my unit economics are negative, should I keep growing?
No. Negative unit economics is a tax on growth. Fix the model first (reduce CAC, improve margins, extend LTV) before scaling. Fast growth on broken economics is just burning capital faster.
How often should I analyze unit economics?
Monthly by cohort (monthly, quarterly, or annual depending on your customer lifetime). Real-time dashboards are best, but monthly reviews at minimum. Stale unit economics data leads to bad strategic decisions.

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