About Marginory
Free tools for estimating fees, profit and prices for online sales. Maintained by the Marginory team.
Calculator methodology
The full method, fee register and verification dates are on the methodology page. In short:
Start with the selling country, plan and product category. Enter the item price, shipping charged to the buyer and costs you pay. Buyer tax can increase a fee base without becoming seller income. Each tool explains which amounts it includes.
Payout means revenue after platform deductions, before product and operating costs. Profit subtracts costs entered in the form. Margin divides profit by seller revenue; markup divides the difference between price and cost by cost.
Break-even and target-margin prices solve the fee model, including fixed fees and modeled caps or tiers. A result marked not achievable means the current assumptions leave insufficient contribution. It does not predict demand at a higher price.
Returns require assumptions about refunded revenue, fee credits, inventory recovery and handling. Where a tool retains fees on returned orders, that assumption is stated. Enter actual credits where supported; do not treat every refunded item as recovered stock.
Published rates and illustrative costs
A fee verification date applies to the cited rate and scope, not every input or account. A content review date indicates an editorial update. Confirm promotions and negotiated rates in your seller account.
POD prices, shipping, FBA fulfillment and labor budgets vary by SKU, variant, provider, destination and account. Example values are planning inputs, not current quotes. Replace them with a dated quote matching your order before setting prices.
Using and checking a result
Compare the breakdown with a completed order statement. Differences may come from tax, currency, rounding, category rules, subscriptions, advertising or charges outside the model. Internal calculations keep precision; displayed currency is rounded. Invoice rounding can differ by cents.
Saved inputs stay in your browser. Share links contain the values you choose to share: review them before sending. Estimates do not replace settlement records or tax advice.
Corrections and funding
Report discrepancies through Contact with the URL, country, category, input values and official rule link. Omit account identifiers and customer details.
Some provider links can earn an affiliate commission. Read our affiliate disclosure, privacy policy and terms. Explore the seller tools.