Break-even ACOS calculator

See how much you can spend on Amazon ads without losing money on each sale. For the Seller (FBA) and Vendor models.

Seller (FBA) Vendor

Customer price (€)GROSS – customer price on Amazon, incl. VAT

VAT (%)rate of the sales country, e.g. DE 19%, FR 20% Amazon referral fee (%)charged on the GROSS price, usually 7–15% FBA fee (€ / unit)NET, excl. VAT – from the FBA rate card · calculate in the FBA calculator

Product cost (€ / unit)NET, excl. VAT – purchase or production Other costs (€ / unit)NET, excl. VAT – shipping to the warehouse, packaging Ad conversion rate (%)orders / clicks Target profit after ads (%)% of the GROSS price to keep as profit

Break-even ACOS–

Profit per unit before ads: –
Target ACOS: –
Max CPC (break-even): –
CPC at target profit: –

BidBeacon calculates this automatically for every ASIN and every search term in your Amazon Ads reports – and tells you which bids to change.

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How we calculate

Amazon Ads reports sales at the price the customer pays (incl. VAT). So the break-even point is the profit per unit before ads divided by the gross price – at that ACOS, advertising eats the whole profit.

Seller: profit = price excl. VAT − referral fee − FBA fee − product cost − other costs. Vendor: profit = Amazon cost price − Vendor fees (DMG, MDF, freight) − product cost − other costs. Enter all costs net (you reclaim input VAT) and the customer price gross – the way Amazon Ads reports it.

Max CPC = price × break-even ACOS × conversion rate. It is the highest bid per click at which the ad still pays off. The target ACOS leaves your planned profit.