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Customer Acquisition Cost Calculator

Calculate CAC from marketing, sales, tools, overhead, and new paying customers.

Example: $30,000
$
Example: $15,000
$
Example: 500

Use customers acquired during the same period as the costs above.

Example: $80
$
Advanced assumptions Optional fees, reserves, and planning targets
Example: $3,000
$
Example: $2,000
$

Review the result

CAC
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Gap to target
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Customers at target
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How to use this calculator

CAC includes more than ad spend

Include the sales and marketing costs used to win new customers in the same period. That can include paid media, salaries, commissions, tools, agencies, and a reasonable overhead allocation.

CAC is not the same as campaign CPA

CPA often measures ad spend per tracked conversion. CAC measures the broader cost of acquiring a new paying customer. They match only when the conversion and cost scopes match.

Formula quick reference

  • Total acquisition cost = marketing + sales + tools/agencies + allocated overhead
  • CAC = total acquisition cost / new paying customers
  • Customers at target CAC = total acquisition cost / target CAC
  • Budget at target CAC = new customers x target CAC

Worked example

Acquisition period example

Inputs: $50,000 total acquisition cost and 500 new paying customers

Result: $100 CAC

Note: At an $80 target CAC, the same cost base would need 625 new customers.

Common mistakes

  • Using customers from a different period than the costs.
  • Leaving out sales or tool costs while comparing against a fully loaded CAC target.
  • Calling a lead or signup a customer when the target is paying customers.

What the result means

  • A useful CAC target depends on gross margin, retention, payback period, and lifetime value.
  • Compare CAC definitions before comparing teams or channels.

Customer Acquisition Cost Calculator FAQ

How do I calculate customer acquisition cost?

Add the sales and marketing costs used to acquire customers, then divide by new paying customers from the same period.

What costs belong in CAC?

Include acquisition-related marketing, sales, commissions, tools, agencies, and any overhead you intentionally allocate to customer acquisition.

Is CAC the same as CPA?

Not always. CPA can mean ad spend per tracked action, while CAC normally uses broader sales and marketing costs per new paying customer.

How do I plan a budget from target CAC?

Multiply target CAC by the number of customers you want to acquire. The calculator also shows how many customers the current cost base would need at the target.

Should I compare CAC with lifetime value?

Yes when reliable lifetime value data is available. CAC alone measures acquisition cost, not how much value the customer produces later.