Customer Acquisition Cost Calculator
Allocate acquisition costs across newly acquired customers.
Open Customer Acquisition Cost CalculatorCustomer Acquisition Cost Calculator: Enter the sales and marketing costs included in your measurement and the number of new customers acquired to calculate blended customer acquisition cost. CAC is broader than campaign CPA when it includes people, tools, content and sales expense.
Customer Acquisition Cost Calculator
Allocate acquisition costs across newly acquired customers.
Formula and assumptions
CAC · Total acquisition cost = Marketing costs + Sales costs + Salaries and commissions + Other acquisition costs. CAC = (Marketing costs + Sales costs + Salaries and commissions + Other acquisition costs) ÷ New customers.
Count new customers once. Avoid counting the same salary in both marketing and payroll.
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Further reading: Digital Marketing Services: Elevating Your Brand and Driving Sales in the Online Era
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Page editor: Muhammad Usman · Last edited: November 3, 2026
What this calculator tells you
Customer acquisition cost divides the selected cost of winning customers by the number of new customers acquired. A useful CAC definition documents which sales, marketing, agency, software and overhead costs are included and how new customers are identified.
- Calculate blended acquisition cost for a month or quarter.
- Compare CAC with contribution or lifetime value.
- Track whether growth remains efficient as spending changes.
For a decision-ready record, save the input definitions, reporting period, currency, source system and calculation date with the result. This makes the Customer Acquisition Cost Calculator output reproducible and prevents a later reader from comparing figures that were produced from different scopes or assumptions.
How to use the Customer Acquisition Cost Calculator
- Define the acquisition period and what qualifies as a new customer.
- Add the sales and marketing costs included in your CAC policy.
- Enter new customers acquired for the compatible period and scope.
- Calculate CAC and compare cohorts using the same cost policy and customer definition.
Formula and variables
CAC = included sales and marketing acquisition costs ÷ new customers acquiredSome costs create customers after the period in which they are incurred. Document timing, attribution and inclusion rules so CAC comparisons remain consistent.
- Acquisition costs
- Selected media, payroll, tools, agency and other costs used to win customers.
- New customers
- First-time customers meeting the documented acquisition rule.
- CAC
- Average included acquisition cost per new customer.
Worked examples
Blended monthly CAC
Sales and marketing costs total $30,000 and 300 new customers are acquired. Blended CAC is $100 per new customer.
Paid-media-only view
Ad spend is £12,000 for 240 new customers, producing £50 paid-media CAC. It should not be labelled fully loaded CAC if payroll and tools are excluded.
Timing effect
A campaign launched in March creates customers in April. A strict monthly calculation may distort both months unless the business uses a consistent cohort method.
How to interpret the result
Lower CAC can improve unit economics, but aggressive reductions may slow growth or reduce customer quality. Compare CAC with gross contribution, retention and payback rather than using cost alone.
Blended CAC is valuable for company planning, while channel CAC helps optimization. Keep both views and avoid combining platform-attributed customers in a way that double-counts the same person.
Practical tips
- Write a formal list of included acquisition costs.
- Deduplicate new customers across channels.
- Use cohort or rolling-period analysis when sales cycles are long.
- Compare CAC with margin-adjusted lifetime value and payback.
Common mistakes to avoid
- Calling ad spend divided by conversions fully loaded CAC.
- Counting returning customers as new customers.
- Comparing periods with different cost-inclusion rules.
Assumptions and limitations
- Attribution and long sales cycles complicate period matching.
- Shared brand or team costs require a consistent allocation method.
- Average CAC can hide differences by product, channel and cohort.
- The formula does not show retention or customer quality.
Treat the result as a planning estimate. Confirm important business, tax, platform or contractual decisions against your own records and the latest applicable terms.
Related tools
Frequently asked questions
What costs should be included in CAC?
Use a documented policy that may include media, relevant sales and marketing payroll, agencies, software, content and allocated overhead.
Is CAC the same as CPA?
No. CPA often measures campaign cost per action. CAC focuses on new customers and can include broader acquisition expense.
Should returning customers be included?
Not in a new-customer CAC denominator. Track retention and repeat purchase economics separately.
How often should CAC be calculated?
Use a cadence that matches the sales cycle. Rolling or cohort views can be more stable than a short calendar month.
What is a good CAC?
A sustainable CAC depends on contribution, retention, cash flow and payback. No universal amount applies.
Sources and review
Primary reference: Google Ads acquisition glossary. Google distinguishes conversion and acquisition metrics. Fully loaded CAC additionally requires the business to define included sales and marketing costs.
Reviewed by: Usman Arshad, Artsians page editor. Last reviewed: November 5, 2026. The calculator runs in your browser and does not perform currency conversion.