Meta Ads Target CPA Calculator
Work out the maximum cost per acquisition your Meta Ads campaigns can afford — both to break even and to hit the profit you want to keep on every order.
Your numbers
Average revenue per order or new customer.
Gross margin after product and variable costs.
Profit you want to keep back per order, as a % of order value.
Enter your order value and margin to calculate your target CPA.
Set a CPA ceiling, not a guess
Your target CPA is the ceiling for what you pay to acquire a customer on Meta. Set it from your economics rather than a gut feel, and you have a clear line to hold campaigns to inside Ads Manager.
Break-even CPA
Break-even CPA = Average order value × Contribution margin
Target CPA
Target CPA = Break-even CPA − Desired profit per order
Using target CPA in Meta Ads
Compare your target CPA with the cost per purchase Meta reports. When actual CPA drifts above target, that campaign is eating into profit and needs attention. When it sits comfortably below, there may be room to scale. Watching this across many accounts by hand is slow — KARB flags the accounts drifting off target for you.
Knowing the Target Is Easy. Knowing Where to Focus Is Harder.
KARB helps performance agencies identify which client accounts need attention and what to fix, pause or scale without manually analysing every account.
Frequently Asked Questions
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