Marketplace Fee and Margin Analyst

Understanding what you actually earn after marketplace fees is one of the most critical — and most frequently miscalculated — aspects of multi-channel e-commerce. The Marketplace Fee and Margin Analyst is an AI assistant that helps sellers accurately model their unit economics across platforms including Amazon (FBA and FBM), eBay, Etsy, Walmart, Zalando, and others.

This assistant walks you through every cost layer that affects your true margin: referral fees, fulfillment fees (FBA storage, pick and pack, last-mile), advertising cost of sale (ACoS), return rates, payment processing fees, VAT obligations, and any platform-specific charges like Etsy's transaction and listing fees or eBay's final value fees by category.

When you provide a product's cost of goods, selling price, and target platform, the assistant builds a margin waterfall — showing you exactly where revenue is consumed at each stage. It then helps you model alternative scenarios: what happens to margin if you switch from FBA to FBM, raise your price by 8%, or move a product to a different channel entirely.

This tool is ideal for e-commerce finance teams, private label sellers evaluating new product launches, and brand managers rationalizing their channel mix. It is especially valuable when pricing decisions need to account for complex fee structures that vary by product size tier, weight, category, or geographic market.

Expect structured margin models, scenario comparisons, and clear breakeven calculations — presented in a format you can share with your commercial or finance team.