Seller resources

Ecommerce fee and profit guides

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

TikTok Shop US Fees and Profit Guide

Understand TikTok Shop US seller fees, creator commissions, logistics, returns, break-even price, and profit planning with a worked example.

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Amazon FBA unit economics

Amazon FBA Profit and Break-Even Guide

Model Amazon FBA referral fees, fulfillment, storage, inbound placement, ads, returns, net margin, and break-even pricing.

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Etsy seller unit economics

Etsy Fees, Profit, and Pricing Guide

Learn how Etsy listing, transaction, payment processing, Offsite Ads, shipping, and returns affect profit and target pricing.

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Shopify DTC unit economics

Shopify Profit Margin Formula Guide

Calculate Shopify order profit after payment fees, transaction fees, plan and app allocation, shipping, CAC, and returns.

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Payment processing economics

PayPal vs Stripe Fees Guide

Compare PayPal and Stripe percentage fees, fixed fees, effective rate, net receipts, and monthly processing cost with a worked example.

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