Campaign review
You spend $12,000 and win 150 new customers.
CAC is $80.
This tells you what it costs, on average, to bring in one customer.
CAC Calculator
Use this calculator when you want a quick read on whether your marketing spend is efficient enough to keep growing.
Inputs
CAC Calculator
See how much it costs to acquire one customer.
Results
Customer acquisition cost
Use CAC to judge whether your marketing spend is efficient.
CAC
$80.00
Cost to acquire one customer.
Marketing spend
$12,000.00
Total acquisition spend.
New customers
150
Customers acquired in the period.
Quick take
A quick read before you calculate
Use this calculator when you want a quick read on whether your marketing spend is efficient enough to keep growing.
Formula
CAC formula
Examples
2-3 real scenarios to make the result easier to trust.
FAQ
Clear answers to the questions people usually ask first.
Formula
CAC formula
CAC = Marketing spend ÷ New customers.
Lower CAC usually means you are acquiring customers more efficiently, but it still needs to be checked against revenue and lifetime value.
Examples
Launch month
You spend $5,000 and get 40 new customers.
CAC is $125.
That may be fine for a premium product, but it is high for a low-ticket offer.
Efficient channel
You spend $3,000 and get 75 new customers.
CAC is $40.
This helps show which channel is pulling its weight best.
When to use
Use it when reviewing campaign performance, comparing channels, or checking whether growth is coming at a healthy cost.
Common mistakes
- Counting leads as customers.
- Leaving out the full marketing spend.
- Comparing CAC without looking at what a customer is worth over time.
FAQ
Should CAC include sales costs?
If your sales team is part of acquisition, yes. Otherwise keep the definition consistent and use the same rule every time.
Is lower CAC always better?
Lower is usually good, but only if the customer quality and revenue stay strong.
Next step
Keep the full revenue picture close
If you want to line up marketing spend with revenue and invoices, QuickBooks or Xero can help you keep the back office tidy.
Use this together with ROAS and profit checks, not on its own.