Maximum CPA Calculator

The maximum you can pay in advertising to acquire one customer at break-even. It equals your contribution margin: selling price minus product cost, shipping, processing fees, and refunds. Spend more than that to win a sale and the order is unprofitable before you count any overhead.

Set your target CPA bid below the maximum, leaving room for profit and overhead. Enter a desired profit per order here and the tool returns the CPA ceiling that still delivers it. If your actual cost per acquisition is above that ceiling, you either raise price, cut costs, or improve conversion — or the product doesn't work with paid traffic.

Yes. This tool assumes a single order, which is the safe way to start. If customers reliably reorder, your allowable CPA rises because acquisition cost is earned back across the whole relationship — that is what the customer lifetime value calculator estimates. Use single-order max CPA to stay solvent, LTV to scale.