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Marketplace Break-Even CPA Calculator

Calculate the break-even CPA in USD for a marketplace order after COGS, fees, shipping and return assumptions.

Calculate the maximum cost per acquisition before a marketplace order stops breaking even.

Ad economics

Sale price ($) Product cost / COGS ($) Marketplace fee (%) Payment processing (%)

Advanced conversion assumptions

Fixed payment fee ($) Shipping and fulfillment ($) Expected return cost ($) Ad click conversion rate (%)Used to translate break-even CPA into max CPC.

Break-even CPA

$0.00

CPA funnel ledger

For beginners: how to read CPA

CPA is per orderIt is the most you can spend to acquire one paid order before profit reaches zero.

CPC depends on conversionHigher conversion allows a higher click bid at the same CPA.

Returns reduce ad roomExpected return cost should be subtracted before deciding the ad ceiling.

This calculator finds how much you can spend to acquire one marketplace order before the order breaks even. Enter sale price, product cost, marketplace fee and payment processing rate. Advanced inputs add fixed payment cost, fulfillment cost, expected return cost and ad click conversion rate.

What the result means

The first number is the maximum CPA before profit reaches zero. The funnel ledger shows how revenue is consumed by costs and fees before any ad spend remains.

What is not included

No ad network, marketplace or carrier rules are assumed. The calculator excludes taxes, bid automation, lifetime value, inventory financing and professional advertising advice.