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Money, pricing & unit economics

How do I calculate CAC, and what's the difference between blended CAC and new-customer CAC?

Blended CAC divides all acquisition spend by every new customer (including organic, referral and repeat-driven traffic); new-customer paid CAC divides only paid spend by the first-time buyers it brought in. Report both, but make scaling decisions on paid/new CAC, because blended quietly hides how inefficient your ads really are the moment you push budget. The number that matters is your marginal CAC: what the next ₹1 lakh of spend costs, not the average of your cheapest early customers.

Go deeper

3 resources, 3 link-checked.

📄 Article
✓ Link checked Free Intermediate

The definitive D2C-specific breakdown of the CAC you should actually track: new-customer CAC vs blended CAC, why the gap matters, and when to use each. From 1-800-D2C, one of the most respected operator resource hubs in the space.

How to Calculate D2C CAC: Formulas for New & Blended

From 1800dtc.com by 1-800-D2C

  • New CAC = paid spend on acquiring first-time buyers; blended CAC spreads spend across all customers.
  • Board and LTV:CAC math uses blended; channel and scaling decisions use paid/new CAC.
  • Reporting only blended CAC hides paid-channel inefficiency until you try to scale.
Open 1800dtc.com
📄 Article
✓ Link checked Free Intermediate

A crisp, numbers-driven walkthrough of how the same month can show a ₹42 blended CAC and a ₹70 paid CAC - and why confusing the two wrecks your scaling decisions. Great companion piece that makes the blended-vs-paid distinction concrete.

What Is Blended CAC vs Paid CAC?

From eightx.co by Eightx

  • A worked example shows how blended CAC masks true paid-channel cost.
  • Set your max-CAC ceiling against contribution margin, using paid CAC.
  • Marginal CAC rises as you scale - the next customer costs more than the average.
Open eightx.co
📄 Article
✓ Link checked Free Intermediate

The canonical investor's-eye view of why LTV:CAC drives valuation, and why 3:1 became the rule of thumb. Read it to understand what a growth-stage investor is really testing when they poke at your unit economics.

Why Do Investors Care So Much About LTV:CAC?

From a16z.com by Andreessen Horowitz (a16z)

  • LTV should be computed on gross/contribution profit, not revenue.
  • Roughly 3x LTV:CAC signals efficient sales-and-marketing returns.
  • Higher LTV:CAC compounds into higher margins and higher valuation.
Open a16z.com

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