Marketing & measurement
CPA
Cost per acquisition or action: spend divided by the defined outcomes.
In everyday use
A$100 spent for five attributed sign-ups gives A$20 per sign-up.
What to keep in mind
Say what the action is. A sign-up is not necessarily a paying customer.
Also searched as: cost per acquisition, cost per action
Further reading
Original explanation and example by Perspectism. Further reading may cover the wider subject, rather than this exact wording. Edition updated 7 October 2026.
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