Break-Even ROAS Calculator
Find the minimum ROAS (and maximum ACOS) at which an ad campaign is still profitable, given your margin.
Set to 0 to find the true break-even point
Results
Contribution margin before ads—
Max ad spend per unit—
Break-even ACOS—
Break-even ROAS—
How this is calculated
Calculates your contribution margin before advertising (price minus COGS minus referral fee minus fulfillment), then subtracts any target profit you want to preserve to find the maximum you can spend on ads and still hit that target.
Break-even ACOS = max ad spend ÷ price. Break-even ROAS = price ÷ max ad spend. Set target margin to 0% to see the absolute floor (zero profit); set it higher to find the ROAS that protects a real profit margin, not just break-even.