ROAS (Return on Ad Spend)
Revenue generated per dollar of ad spend - the inverse framing of ACOS, often preferred when talking to stakeholders. Framing performance as ROAS rather than ACOS often changes how a budget conversation goes, since "$4 back per $1 spent" reads as an investment, where "25% ACOS" can sound like a cost.
In practice
A ROAS of 4 means $4 in revenue for every $1 spent - it's the same underlying math as ACOS, just expressed the other way around, and which one a team reports often comes down to which framing is easier to explain to non-marketers.
An agency reports "a 5x ROAS this month" to a client instead of "20% ACOS," because it reads more directly as return on investment.
Why it matters
Framing performance as ROAS rather than ACOS often changes how a budget conversation goes, since "$4 back per $1 spent" reads as an investment, where "25% ACOS" can sound like a cost.
Worth knowing
- Mathematically the inverse of ACOS - a 25% ACOS is the same performance as a 4x ROAS.
- A target ROAS should be set from the product's margin, the same way a break-even ACOS is calculated.
- Commonly used across non-marketplace ad platforms too, like Meta and Google Ads, beyond Amazon.
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Tell us where things stand with putting roas into practice and we'll respond with next steps, no forms, no waiting in a queue.
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