Breakeven ROI Calculator

Before you set a bid or launch a campaign, you need to know your breakeven ACoS — the maximum advertising cost of sale at which you neither profit nor lose money on each unit sold. This tool calculates that ceiling by subtracting your cost of goods, referral fees, and fulfillment costs from the selling price to find the gross margin available for ad spend.

Select your platform (Amazon VC, Amazon SC with FBA, Google Ads DTC, or custom) and the tool pre-fills typical fee structures you can adjust for your category. The output gives you both breakeven ACoS and breakeven ROAS, plus a per-unit cost waterfall so you can see exactly where margin is going. Use the breakeven ACoS as the upper limit when setting target ACoS in your campaigns. By DataBridge Advisory.