Amazon ACoS (Advertising Cost of Sale) is a metric that shows how much money you spent on advertising versus sales you received for a given product on Amazon. The formula for ACoS is 100 ( [total ad spend] ÷ [total sales] )

2 Ways to get your Maximum ACoS

As a rule of a thumb, there are several ways to determine what is your Maximum ACoS  for a keyword:

1. If you choose to be aggressive:
2. Input your profit margin.
3. If you choose to be conservative + 10% profit for each click, for each sale:
4. You have to figure out your profit margin and do some subtraction to know what to input.

Your scenarios:

Profit margin

Seller's intent

Maximum ACoS

35%

10% profit

25%

35%

break-even

35%