Break-even ROAS calculator

Break-even ROAS is 100 divided by your gross margin percentage. At a 40 percent margin, every dollar of revenue carries 40 cents of gross profit, so you need 2.5 dollars of revenue to cover each dollar of ad spend. That is a break-even ROAS of 2.5x. The profit target works the same way but leaves room for what you want to keep. If you want to hold on to 10 percent of revenue as profit, only 30 of your 40 margin points are available to pay for ads, so the required ROAS becomes 100 divided by 30, which is about 3.3x.

Set the break-even figure as the hard floor for any campaign that is purely about acquisition. Below it you are paying to lose money on each order, which only makes sense if you have measured repeat purchases and know they cover the gap. Set the profit target figure as the working goal for campaigns you expect to fund the business this month. If a campaign sits between the two, it is contributing to overheads but not to profit, and the decision to keep it depends on what else you could do with the budget.

Two stores with identical campaigns and identical ROAS can have opposite outcomes because their margins differ. A store at 60 percent margin breaks even at 1.7x. A store at 25 percent margin needs 4.0x just to stand still. Before spending more on ads, the cheaper fix is often on the other levers: a higher average order value through bundles spreads the same shipping and acquisition cost across more revenue, and a better conversion rate lowers the effective cost of every click. Both push the ROAS you actually achieve up while this floor stays where it is.