What is target ROAS?
Target ROAS is a bidding setting where you tell the ad platform the average return on ad spend you want, and it adjusts bids on each auction to aim at that average.
Formula
Target ROAS = desired revenue ÷ planned ad spend, entered as a ratio or a percentage
Worked example, not a result
Choosing a target above the break-even line
Say a store has a contribution margin of 41 percent, which puts break even at about 2.44. Setting the target at exactly that would mean running the ad account for nothing, so the store sets a target of 3.4 instead, leaving room for overheads and profit. In accounts that express the setting as a percentage, that is entered as 340 percent.
What happens next is the part people find surprising. Raising a target does not make campaigns more efficient by itself. It makes the system bid only where it expects a high return, so it enters fewer auctions, spend falls, and both revenue and total profit can fall with it. Lowering the target does the opposite: more auctions, more spend, a lower average return and often more total contribution.
So the target is a volume dial as much as an efficiency dial. Move it in small steps, give the campaign time to settle, and judge the change on total contribution rather than on the ratio alone.
The figures above are an example.
Why it matters
Target ROAS is the setting where a store's margin arithmetic finally reaches the ad auction. It is how the break-even work you did on paper starts affecting what you actually pay for a click, and it is the main way to control the trade off between efficiency and volume on the visitors lever.
It also depends on the other three levers being measured properly. The system optimises towards the conversion value your store reports, so if that value includes tax and shipping, or double counts orders, the target is aiming at the wrong thing. If average order value rises or conversion improves, the same target suddenly buys more traffic without any change in the account.
For a store owner the decision it drives is how hard to push. A target well above break even protects margin and caps growth. A target closer to break even buys more customers at thinner margin, which is the right choice when repeat purchases are strong.
Common mistakes
- Setting a target far above what the account has ever achieved. The system responds by bidding almost nowhere, spend collapses, and the campaign looks broken rather than efficient.
- Changing the target every few days. Bidding needs a settled period to learn, and constant adjustment leaves the campaign permanently unsettled and permanently blamed.
- Setting one target across products with very different margins. Custom labels that group products by margin let you run a target that suits each group.
- Judging a target change on the ratio alone. The ratio nearly always improves when you raise the target, while the money the store keeps can fall at the same time.
Related terms and answers
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