How this calculation works
Sum the acquisition costs you choose to include, then divide by unique new customers for the same scope. The media-only figure uses a narrower cost base. Neither is automatically the same as cost per lead, per order or per attributed ad conversion.
Blended CAC = included acquisition costs / unique new customersA worked example
16,000 of included costs divided by 40 new customers gives 400 blended CAC. Media spend alone gives 250 per customer.
Good to know
A transparent arithmetic model using your inputs. Example prices, rates and multiples are demonstrations, not benchmarks or offers. No tax, exchange-rate conversion, live account access or automatic attribution is supplied. Monetary display is rounded; calculations retain additional precision.
Choose a cost scope before comparing customer costs
A media-only acquisition cost leaves out the additional labor and tools included in a blended calculation. Neither scope is automatically wrong, but comparing them without naming the difference can make an apparent improvement that is just an accounting change.
Use unique new customers for the same period and scope as the costs. Repeat orders and existing customers are different events. A lead or attributed ad conversion also need not be a newly acquired paying customer.
Customer lifetime contribution estimates a separate future contribution stream. Comparing it with acquisition cost requires compatible customer scope and cost definitions.
Cohort timing can change interpretation
A campaign’s costs may occur before some acquired customers appear in the reporting period. A simple same-period division is transparent, but it does not allocate costs to cohorts or resolve long sales-cycle timing.
Review which costs are included consistently over time. Adding a salesperson’s compensation this month while omitting it last month changes the definition as well as the number. The two outputs help expose the difference between the chosen blended scope and media alone.
A few questions, answered
Why require at least one new customer?
The per-customer ratio is undefined when its denominator is zero.
Can I compare CAC directly with revenue per customer?
Those amounts cover different cost and time bases. A contribution-based customer value over a defined horizon is often a more coherent comparison, provided the assumptions match.