Free profitability calculator
Break-even ROAS & target CPA calculator
Estimate the highest acquisition cost and lowest ROAS an order can support before advertising consumes its contribution margin.
Maximum CPA = (order value × gross margin) − other variable costsHow to use the result
Set targets from unit economics, not a generic benchmark.
This model uses gross margin and other per-order variable costs. It does not include fixed overhead, tax, delayed returns, customer lifetime value or attribution uncertainty unless you account for them in your inputs.
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Enter clean inputs
Use values from the same campaign, platform and reporting period so the result answers one clear question.
- 02
Check the output
Treat the calculation or formatted list as a working aid. Review the source data, naming and campaign context before using it.
- 03
Save the decision
Copy the result into the campaign plan or reporting note together with the date, data source and any important limitation.