Overview
Break-even ROAS is the return on ad spend at which a sale exactly covers all of its costs, leaving zero profit and zero loss. It is the minimum ROAS you need before a paid push starts making money.
Knowing it turns ROAS from a vanity number into a decision rule: scale above break-even, cut below it.
How it works
Break-even ROAS is roughly 1 divided by your contribution margin percentage. If your margin after product, fees, and commission is 25%, your break-even ROAS is about 4x. Anything above 4x profits; below 4x loses money.
Why it matters
Without break-even ROAS, a '4x ROAS' is meaningless because you do not know if that is good. It anchors every scaling decision to your actual unit economics.
How brands use it
Brands calculate break-even ROAS per product, then set ad targets comfortably above it and pause placements that drift below.
