Level: Intermediate
Before increasing budget on any campaign, you need to know the specific return threshold that spend actually has to clear to remain profitable.
The Formula Is Straightforward
Break-even ROAS = 1 ÷ gross margin percentage. A 40% margin means you need $2.50 in revenue for every $1 spent just to break even, before any profit.
Compare Every Campaign Against This Number
A ROAS that looks impressive in isolation might still be below your actual break-even threshold once compared against your specific margins.
Recalculate as Your Margins Change
Break-even ROAS shifts with cost changes, promotions, or shifts in product mix, so it's worth recalculating periodically rather than treating it as a fixed number.
Next step: Use the Sales Letter Writer to make sure the copy driving conversions is strong enough to comfortably clear your break-even threshold, not just barely meet it — refine the offer before scaling spend against a thin margin.