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Amazon break-even ACOS calculator

Find the ad cost that consumes your product contribution and compare it with your campaign.

Your actual costs

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Currency labels the report only. Enter actual fees for your category and market; no fees or exchange rates are fetched.

Currency

Currency labels amounts only; no exchange-rate conversion.

Selling price per unit

Exclude recoverable sales tax.

Product purchase cost

Actual cost, not selling price.

Inbound freight / prep per unit

Allocate the shipment cost across units.

Packaging per unit

Packaging costs you pay.

Referral fee %

Enter your category and market rate; Amazon fees are not assumed.

Other fixed fees per unit

Actual fees not included elsewhere.

FBA fulfilment or your shipping cost

Enter the cost of one fulfilment method; do not count it twice.

Storage allowance per unit

Actual storage allocated to each unit.

Return cost allowance per unit

An average net cost after recoveries, not a return percentage.

Other allocated costs per unit

For example a share of the subscription; avoid duplicate fees.

Target profit after ads per unit

Amount you want to retain after entered costs and ads.

Campaign ad spend for the period

Use the same period and attribution basis as campaign revenue.

Ad-attributed campaign sales

Not total store sales. Zero makes ACOS undefined.

Calculator inputs are not uploaded or saved to an account. Reports are prepared locally for download to your device.

Understand the number before the decision

Example: how much can you spend before losing contribution?

A price of 40 and non-ad costs of 25.50 leave 14.50. Break-even ACOS is 36.25%, with ROAS about 2.76. Retaining 5 per unit after ads lowers target ACOS to 23.75%. There is no single suitable percentage for every product.

Campaign ACOS is not store profit

Ad spend of 200 and attributed sales of 1,000 give ACOS of 20% and ROAS of 5. Use a matching period and attribution basis. This ratio does not calculate profit across different products or include organic sales; compare it with the right product costs.

Undefined values stay explicit

With zero attributed revenue ACOS is undefined. With zero spend ROAS is not shown as infinity. If no contribution remains before ads, there is no positive break-even ad budget; if requested profit exceeds contribution, no ACOS achieves the target.

Independent tools by Zabtna; not affiliated with Amazon. Product approval is not guaranteed.

References reviewed: 8 October 2026

Official Amazon references

Amazon Ads: ACOS and break-even ↗

What is included?

Estimate from your inputs; not an official Amazon earnings statement. Currency labels the report only. Enter actual fees for your category and market; no fees or exchange rates are fetched.