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Select a marketplace
Choose the currency you use for that region's reporting.
Amazon Target ACOS Calculator
Set profitable ACOS targets Price + costs + desired margin → break-even and target ACOS.
Use this calculator to understand your ACOS performance and set targets based on the profit margin and variable costs in your own internal model. It uses simple, clear math with no hidden assumptions.
Tool
Amazon target ACOS calculator
Use the marketplace selector and your current ad spend and sales to calculate ACOS, ROAS, and a simple advertising margin view. Compare the result with the break-even and target ACOS levels from your full cost model.
Commerix Systems
Global Amazon Marketplace Calculator
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ACOS
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ROAS
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Profit
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Margin
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Note: “Profit” and “Margin” here do not include COGS, fees, refunds, or shipping—add those to your internal model for true contribution.
How it works
Calculate your optimal ACOS in any marketplace
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Enter your performance data
Use ad spend and sales from the same reporting period, then compare the result with your desired margin and full variable costs.
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Set break-even and target ACOS
Use break-even as your ceiling, and use target ACOS as the goal that defends your profit.
Target ACOS Explained
Target ACOS is the ACOS you aim for so your ads still leave you the profit you want. It sits below your break-even ACOS, which is the point where ads cost exactly as much as the profit they bring in.
Break-even ACOS is your ceiling
Spend more than this on ads, and you start losing money on each sale.
Target ACOS is your goal
It is set below break-even so you keep the profit margin you actually want.
The gap protects profit
If break-even ACOS is 40% and target ACOS is 25%, the difference is the profit you are protecting.
Knowing both numbers means you never overspend by accident, and you always know how much room you have before an ad campaign starts eating into your earnings.
This is why a target ACOS calculator matters. Without it, sellers often guess their numbers and either overspend and lose money, or underspend and miss sales they could have won profitably.
Profit Margin Calculations
Your target ACOS depends entirely on your real costs and the margin you want to keep. To use this tool well, you need to know what goes into each sale.
- Product price is what the shopper pays you.
- Manufacturing or unit cost is what it costs you to make or buy the product.
- Amazon fees include referral fees and FBA fees if you use fulfillment.
- Shipping and handling covers getting the product to Amazon or the customer.
- Desired profit margin is the percentage of profit you want to keep after all costs and ads.
Once you enter these into your full cost model, you can work out how much room is left for ad spend. The cleaner your cost inputs, the more accurate your break-even and target ACOS will be. Garbage in means garbage out, so it pays to know your true per-unit costs before you bid on a single keyword.
Scaling Profitably
Knowing your target ACOS is what lets you grow without losing money. Many sellers scale ad spend based on gut feeling, then wonder why revenue went up but profit went down. The answer is almost always an ACOS that crept above target.
Treat break-even as a hard ceiling
Any campaign running above break-even ACOS is losing money on every sale. During a launch you might accept this briefly to build rank, but it should never be your normal state.
Use target ACOS as your everyday goal
Keep your campaigns at or below target ACOS, and every extra dollar of ad spend grows your business profitably.
Recalculate when costs change
New supplier pricing, fee changes, or shipping cost shifts all move your break-even and target ACOS. Update your numbers whenever your costs do.
Scale winners, not everything
Once a product proves it can sell at or below target ACOS, that is your signal to add budget. Put more into proven winners instead of spreading spend thin across products that have not earned it yet.
The brands that grow profitably are not the ones spending the most. They are the ones who know their target ACOS on every product and never lose sight of it while scaling.
Ready to set ad targets that protect your profit?
Use the calculator above to review your current ACOS, then talk to us if you want help building a campaign structure that scales without eating your margin.