How to Use This Tool
A break-even CPC is not a marketplace average. It is the most your product can pay for one ad click when the clicks convert at the rate you enter. Start with the selling price, then remove referral, fulfilment, landed product and other per-order costs. What remains is contribution margin before advertising.
The conversion rate is the multiplier
If a sale leaves $10 before ads and one in ten ad clicks buys, each click can consume at most $1.00. At a 5% conversion rate the same listing can afford only $0.50. That is why copying a competitor's bid without knowing their conversion rate is meaningless.
Target CPC versus break-even
Break-even leaves zero profit. The target slider reserves a share of contribution as profit and spends only the rest. A 25% target means ads may use 75% of pre-ad contribution. This is deliberately stricter than bidding exactly at break-even.
Use current Seller Central numbers
Amazon changes fulfilment and referral schedules, and the exact values depend on category, dimensions and weight. The fields are editable so the page does not pretend one static table fits every ASIN. Confirm the fee preview in Seller Central, use advertising conversion rather than total listing conversion, and model returns inside “other cost” when they are material.
Sources & assumptions
Tool Spec v2 · verified 2026-08-18. Platform rules and fees can change; the editable inputs remain authoritative for your account.
Official references
- Amazon Ads — advertising budget, ACoS and ROAS (checked 2026-08-18)
Model assumptions
- Contribution margin excludes advertising and is calculated from the editable per-order inputs.
- Advertising conversion rate means attributed ad orders divided by ad clicks, not total listing conversion.
