What is Break-even ROAS?
The return on ad spend at which a campaign covers its costs exactly, producing neither profit nor loss on the marginal sale.
Break-even ROAS = 1 / Contribution Margin (as a decimal)
A worked example
Your contribution margin is 32 per cent, so break-even ROAS is 1 divided by 0.32, roughly 3.1. A campaign reporting 2.8 is losing money on every order it produces, however healthy the dashboard looks.
Why it matters
Break-even ROAS turns an abstract efficiency number into a decision rule. Above it you are buying profitable sales, below it you are buying revenue with your own money. Without it, ROAS targets get borrowed from other businesses whose cost structures have nothing to do with yours.
The spread across margin structures is severe. At 45 per cent contribution margin, break-even is about 2.2. At 20 per cent it is 5.0. Two brands both reporting 3.5 ROAS can be comfortably profitable and steadily losing money, and no benchmark article can tell them apart.
Once you have the figure, it also tells you where to look when performance is short. If break-even is 5.0 and you are achieving 3.5, no amount of campaign optimisation closes that gap. The answer is margin: raise average order value, cut shipping cost, or reconsider the price point.
The nuance most people miss
Break-even ROAS covers the marginal sale only. It does not include agency fees, tooling, salaries or any fixed cost, which means a campaign running exactly at break-even is still leaving the business worse off overall. Add a target margin above break-even that reflects what the business actually needs to cover, and treat break-even as the floor rather than the goal. For brands with genuine repeat purchase, a lower first-order threshold is defensible if the repeat behaviour has been observed in real cohorts.
Common mistakes
- Adopting a ROAS target from a competitor or an article rather than deriving your own
- Treating break-even as a goal when it leaves nothing for fixed costs
- Calculating from gross margin instead of contribution margin, which sets the bar far too low
- Comparing platform-reported ROAS against a break-even figure derived from real delivered orders