Who the site is for
Margenao is built for independent ecommerce sellers, side businesses and small online brands that need a clearer view of product economics before listing, advertising or scaling a product.
What we publish
We provide browser-based calculators for marketplace fees, order profit, break-even pricing and target margins, alongside practical guides on fulfilment costs, contribution margin, advertising efficiency and order-level tracking.
How to use the tools
Enter your own product costs, shipping, platform fee assumptions and advertising costs. Review the itemized breakdown, then compare the estimate with your actual seller statements. Fee structures vary by country, category, account plan and transaction details, so the calculators should be treated as planning aids rather than official fee quotes.
Editorial and calculation standards
We aim to publish original, practical explanations and show the assumptions behind each estimate. Calculator formulas are designed to be inspectable and adjustable; they are planning models, not official platform fee quotes. Where a platform-specific fee is modeled, we link to the provider’s official fee documentation and identify material simplifications or exceptions.
For important decisions, compare the calculator output with your own seller statements, invoices and payout records. When a fee schedule, product feature or program term changes, verify it against the current primary source before relying on an older example. We do not claim to independently test software unless a page explicitly says that testing was performed.
Our guides are educational resources prepared for independent ecommerce sellers. They are not individualized tax, legal, accounting or investment advice. The examples use simplified assumptions and are intended to explain the method rather than predict results.
Independence and limitations
Margenao is not owned by, sponsored by or affiliated with eBay, Etsy, Amazon, Shopify or any payment processor. We do not provide legal, tax, accounting or investment advice, and we cannot guarantee a product will be profitable. Read our calculation methodology, disclaimer and privacy policy for more detail.
Corrections and updates
Platform fee schedules change. We encourage visitors to verify rates against current official documentation and their own account statements. For general questions, website feedback or corrections, email support@margenao.com. Please do not send passwords, payment card details or sensitive financial or account information.