ROAS explained - what it really means and how to set a target that makes sense

ROAS is a ratio. Like all ratios, it provides useful information but requires context to interpret correctly. A 300 percent ROAS on a high-margin product with low fulfilment costs is profitable. A 300 percent ROAS on a product with 20 percent gross margin and high returns rates may not be. Understanding what ROAS does and does not capture changes how you use it as a bidding target and a reporting metric.

ROAS vs profit

ROAS is a revenue metric, not a profit metric. It tells you how much revenue you generated per pound spent on advertising. It does not tell you whether that revenue was profitable after cost of goods, fulfilment, returns, and overhead are accounted for. This distinction matters enormously for setting bidding targets. A 400 percent ROAS target might be appropriate for a product with 60 percent gross margins and low returns. For a product with 25 percent margins and a 15 percent returns rate, 400 percent ROAS is below breakeven.

The correct ROAS target calculation starts with your gross margin and works backwards. If your gross margin is 40 percent and you want to retain half of it after advertising costs, your breakeven ROAS is 1 divided by 0.4 = 250 percent and your target ROAS should be significantly above that. Many businesses set ROAS targets that feel aspirational but are actually below their true breakeven point when margin is properly accounted for.

ROAS and attribution

The ROAS figure in your Google Ads account reflects Google's attribution model - typically data-driven attribution, which distributes credit across multiple touchpoints. The revenue attributed to Google Ads may include purchases that were influenced by other channels - social media awareness, email marketing, organic search - but where the final click happened to be a Google Ad. This is not fraud - it is how multi-touch attribution works. But it means your reported Google Ads ROAS may overstate Google's incremental contribution to that revenue. Understanding the attribution methodology behind your ROAS figures is necessary for comparing across channels accurately.

Blended ROAS vs campaign-level ROAS

Account-level ROAS blends brand campaign performance - typically excellent ROAS because brand searches convert easily - with non-brand performance. Non-brand ROAS is typically lower and represents your true acquisition efficiency for new customers. Reporting blended ROAS without separating brand from non-brand consistently overstates non-brand efficiency. Set separate ROAS targets for brand and non-brand campaigns and report them separately.