# What is blended CAC?

> Blended CAC is your total acquisition spend divided by all new customers, from every channel. Formula, a worked example in rupees and how it differs from paid CAC.
- **Author**: Marxx
- **Published**: 2026-11-15
- **Category**: Metrics
- **URL**: https://marxx.ai/library-glossary/blended-cac

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Blended CAC is your total acquisition spend divided by all your new customers, from every channel. It counts organic, referral and paid customers together. If you spent INR 5,00,000 and won 1,000 new customers, your blended CAC is INR 500.

## The formula

Blended CAC = total acquisition spend / all new customers

Keep the spend list the same every month. A full version includes ad spend on every platform, agency fees, creative costs and marketing tools. See [CAC](/glossary/cac) for the basic idea.

## Blended CAC and paid CAC

| | Blended CAC | Paid CAC |
|---|---|---|
| Spend counted | All acquisition spend | Paid ad spend only |
| Customers counted | All new customers, any source | Only customers the ads are credited with |
| Hard to fool? | Yes. Credit fights do not change it | No. Two platforms can both claim one sale |

## A worked example

Say your brand spent this in a month:

- Meta ads INR 3,00,000
- Google ads INR 1,00,000
- Creative and agency costs INR 80,000
- Tools INR 20,000

Total = INR 5,00,000. Your store won 1,000 new customers. Of these, 600 bought after a paid ad. The other 400 came from search, word of mouth and email.

- Blended CAC = 5,00,000 / 1,000 = **INR 500**
- Paid CAC = 4,00,000 ads spend / 600 = **INR 667**

Compare either CAC with customer value in the free [LTV to CAC calculator](/ltv-cac-calculator).

Paid CAC is higher because it divides ad spend by only the 600 customers the ads are credited with. Blended CAC divides all spend by all 1,000 customers. Some of the 400 organic buyers may have heard of you through your ads. Blended CAC gives the ads that credit, and paid CAC does not. Watch both numbers and the gap between them.

## What to watch for

- **Organic growth can hide a weak paid channel.** If blended CAC holds while paid CAC climbs, check why.
- **Only new customers count.** Repeat buyers lower the number and mislead you.
- **Compare like with like.** A sale month can pull in customers who saw your ads weeks earlier.

Pair blended CAC with [MER](/glossary/mer), which does the same job for revenue. Then check what a customer is worth. The [LTV:CAC ratio](/glossary/ltv-to-cac-ratio) and the [CAC payback period](/glossary/cac-payback-period) show if your INR 500 pays back.

## FAQ

### Is blended CAC the same as CPA?

No. [CPA](/glossary/cpa) is the cost per action on one platform. Blended CAC covers every channel and every cost you include.

### What is a good blended CAC?

One that you earn back. Compare it with customer value over time and your payback period.

### Should blended CAC include returning customers?

No. Count only first-time customers, or the number will look better than it is.

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