Is Break-even ACoS the same as target ACoS?

No. Break-even ACoS is your profitability ceiling — the maximum you can afford. Your target ACoS is the level you actually aim for, and most advertisers set it below break-even to leave a margin for fluctuations in CPC, conversion rate and profitability.

Can Break-even ACoS change?

Yes. It changes whenever any input changes — selling price, product cost (COGS), Amazon fees or your desired profit per unit. A higher price or lower fees raises your break-even ACoS; higher costs or a higher desired profit lowers it.

Should every product have the same Break-even ACoS?

No. Break-even ACoS is specific to each product's price, costs, fees and profit goal. Higher-margin products can sustain a higher break-even ACoS, while thin-margin products have a much lower ceiling. Calculate it per product rather than applying one number across your catalog.

Does the Amazon FBA fee affect Break-even ACoS?

Yes. FBA fees are part of total Amazon Fees in the calculation, alongside the referral fee and any other Amazon charges. Higher fees reduce the margin available for advertising, which lowers your break-even ACoS.

Why should I operate below my break-even ACoS?

Break-even ACoS is a ceiling, not a goal. Running exactly at break-even leaves no room for day-to-day swings in CPC, conversion rate and returns. Operating below it keeps your campaigns profitable even when performance fluctuates.

Do I need to connect my Amazon account to use this?

No. The calculator is purely mathematical and uses only the four values you enter. There is no login, no email and no Amazon Ads account connection required.

Calculator

Break-even ACoS Calculator

Calculate your Break-even ACoS in under 30 seconds using your product price, costs and Amazon fees.

Marketplace

Selling Price

Product Cost (COGS)

Amazon Fees

Referral Fee + FBA Fee + Other Amazon Fees

Desired Profit Per Unit

Enter your selling price, costs, fees and desired profit to see your Break-even ACoS.

Frequently Asked Questions

Break-even ACoS is the highest Advertising Cost of Sales (ACoS) a product can sustain before it stops meeting your desired profit target. At this level, the margin left after product cost, Amazon fees and your desired profit is exactly what you can spend on advertising.