Seller resources
Work through platform fees, fulfillment, payment processing, advertising, returns, break-even price, and target margin before committing inventory or acquisition spend.
Every guide uses the same tested formulas as its calculator, shows a worked planning example, and links to official fee sources. Defaults remain editable because account, market, category, and payment rules change.
TikTok Shop US unit economics
Calculate TikTok Shop US profit after seller fees, creator commission, CNY-to-USD product cost, advertising, logistics, and returns.
Read TikTok Shop fees and profit guideAmazon FBA unit economics
Model Amazon FBA referral fees, fulfillment, storage, inbound placement, ads, returns, net margin, and break-even pricing.
Read Amazon FBA profit guideEtsy seller unit economics
Compare Etsy Offsite Ads at 12% or 15%, transaction fees on shipping, seller-country payment processing, and order profit.
Read Etsy fees, ads, and shipping guideShopify DTC unit economics
Calculate Shopify order profit after payment fees, transaction fees, plan and app allocation, shipping, CAC, and returns.
Read Shopify profit margin guidePayment processing economics
Compare Stripe vs PayPal fees by order value and monthly volume with editable rates, effective costs, a worked example, and official sources.
Read Stripe vs PayPal fees guide