Calculator
Customer Acquisition Cost Calculator
Estimate average customer acquisition cost from the sales and marketing spend tied to a specific campaign, channel, or period.
Result
Customer acquisition cost
$40.00
New customers acquired
250
How to use this calculator
What this calculator does
Estimate average customer acquisition cost from the sales and marketing spend tied to a specific campaign, channel, or period.
How to use it
Use spend and customer counts from the same attribution window. If sales cycles are long, run separate scenarios for booked customers, qualified customers, and delayed conversions.
What the result means
Use the result as a direct calculation from the values you entered. If it looks off, check the inputs and formula shown on this page.
Browse more business calculators for related estimates and comparisons.
Business results are estimates for planning and education. They are not business, legal, tax, employment, accounting, or financial advice.
Scenario guidance
When to use this
Use this when comparing whether a campaign or channel is acquiring customers at a cost that can be supported by margin, payback time, and retention.
Example scenario
A SaaS team is reviewing a paid-search campaign and wants a quick CAC estimate before comparing it with customer lifetime value and payback targets.
Inputs that usually matter most
- Marketing and sales spend, including the costs intentionally assigned to acquisition.
- New customers acquired, counted with the same attribution rule and time period as the spend.
- Customer definition, because trials, leads, first purchases, and paid subscribers can produce very different CAC figures.
Common mistake to avoid
Do not mix this month's spend with a customer count from a different conversion window unless the lag is intentional and documented.
How to interpret the result
Lower CAC is not automatically better if those customers churn quickly, buy low-margin products, or require heavy onboarding. Compare the result with gross margin, payback period, and retention quality.
This is an attribution estimate, not an accounting standard. It does not decide which costs your business should capitalize, expense, or assign to a channel.
Formula
Customer acquisition cost divides acquisition spend by the number of new customers acquired in the same period.
Example acquisition-cost review
If a launch campaign spends $18,000 across ads, sales tools, agency support, and commissions and brings in 320 new customers, estimated CAC is $56.25 per customer.
Frequently Asked Questions
What spend should be included?
Include the marketing and sales costs you want attributed to acquisition, such as ads, tools, agency fees, commissions, or campaign labor.
What happens if no customers were acquired?
CAC is shown as undefined because the formula divides spend by new customers.
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