What it actually means
Aggregate revenue tells you how big a company is. Unit economics tells you whether each new customer makes the company richer or poorer. A company can grow revenue 10x while becoming more loss-making, if each unit loses money.
The two headline numbers are CAC (customer acquisition cost — what you spend to win a customer) and LTV (lifetime value — the gross profit they generate before they churn). Healthy businesses run at LTV/CAC > 3 and recover CAC in under 12 months.
Quick commerce, ride-hailing and food delivery have all been audited mercilessly on unit economics in the last few years — not because growth slowed, but because investors finally insisted on per-order profit, not just per-order GMV.
How to spot it
- Per-customer or per-order contribution margin is positive and growing.
- CAC payback period is under 12 months.
- LTV/CAC ratio is above 3, ideally above 5 for SaaS.
- Cohorts get more profitable over time, not less.
See it in the wild
Zepto — order-level profit
10-minute delivery only works if average order value, take rate and dark-store throughput together cover labour + rider cost. Each ₹50 saved per order is the difference between unicorn and zombie.
Razorpay — transaction-level economics
Take rate × volume per merchant must cover servicing cost. UPI cratered take rates and forced Razorpay to add cross-sell products to keep unit economics positive.
Frequently asked questions
What's a healthy LTV/CAC ratio?
For SaaS, 3:1 is standard, 5:1 is excellent. For consumer subscriptions, 3:1 with a 12-month payback. For one-off transactions (e-commerce), think in contribution margin and repeat rate instead.
Why do startups grow despite bad unit economics?
Because growth attracts capital that subsidises the loss per unit. The bet is that scale (better procurement, better routing, brand) will eventually flip economics positive. Many never get there.
How is unit economics different from gross margin?
Gross margin ignores customer acquisition spend. Unit economics includes it. A 70% gross-margin SaaS business can still have terrible unit economics if CAC payback is 5 years.
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