Break-even ACoS calculator
What can this product afford to spend on ads?
Enter the actual price and per-unit costs for one product in one marketplace. Your inputs stay in your browser.
Your inputs stay in this browser. No upload or email is required.
How the calculation works
Contribution before ads = sale price − Amazon fees − product cost. Break-even ACoS = contribution before ads ÷ sale price × 100.
For example, a CAD 20 sale price, CAD 6 in Amazon fees and CAD 8 in product cost leaves CAD 6 before ads: a 30% break-even ACoS. At that level, the costs entered and ad spend use up the sale revenue.
Amazon defines ACoS as ad spend divided by ad-attributed sales. Use the same revenue basis for this calculation and your advertising report. Sales tax, pack sizes, discounts, returns and changing fees can affect the comparison.
This is a cost calculation, not a suggested bid. Leave room below the break-even point for expenses you have not included and for profit. Account overhead and the effect of advertising on sales need their own review.
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