Pick your marketplace and enter your price and costs to instantly see your break-even ACoS — the exact point where your ads stop making money — plus your margin, ROAS and target ACoS.
Per unit. Estimate anything you're unsure of.
💡 Referral fee is ~15% for most categories. FBA fees vary by size, weight & marketplace — get your exact figures from Amazon Seller Central's FBA Revenue Calculator, then paste them here.
The ACoS where an ad-driven sale makes exactly 0 profit. break-even ACoS = profit before ads ÷ price. Run below it to profit, above it to lose money.
The same thing in ROAS terms. ROAS = 1 ÷ ACoS. If your break-even ACoS is 40%, your break-even ROAS is 2.5×.
To keep a target net margin, your ads need to run below break-even ACoS − target margin. That's the number to actually manage bids to.
The maths is the same worldwide — only the currency and your fees change. Pick your marketplace and enter that market's price and fees.
We manage Amazon PPC across UK, US, EU and beyond — keeping your ACoS below break-even while scaling sales. Get a free audit and we'll show you exactly where your budget is leaking.
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