Seller resource hub
Ecommerce Guides for Pricing, Profit, Fees, and Shipping
Commerce Tally articles explain the decisions behind the calculators. Use these guides to understand product cost, marketplace fees, shipping strategy, payment processing, returns, inventory movement, and sales tax estimate limits before you rely on a single result.
Last updated: May 14, 2026 | Edited by Commerce Tally Team
Pricing clarity
Learn how margin, markup, discounts, and break-even analysis work together when you set prices for products sold online.
True selling cost
Account for platform fees, payment fees, shipping, returns, packaging, and other costs that can quietly reduce net proceeds.
Better planning
Compare scenarios before launching a product, running a promotion, changing packaging, or buying inventory for a new marketplace.
How to Use the Commerce Tally Guide Library
Start with the guide closest to the decision in front of you, then open the related calculators linked from that article. A seller reviewing a new product might begin with true product cost, move to selling price, check marketplace fees, then test shipping and return assumptions. A seller planning a promotion might start with discounts, then check margin, payment fees, and break-even units.
The guides are intentionally practical rather than academic. They explain what the inputs mean, where estimates can go wrong, and which assumptions should be verified with official platform, carrier, payment processor, accounting, or tax records. This makes the article hub useful for both new sellers learning ecommerce math and experienced sellers checking a specific pricing or operations decision.
No guide replaces professional advice, but each one should help you ask sharper questions, avoid common blind spots, and use the calculators with more context. Bookmark the article hub when reviewing supplier costs, marketplace listings, free shipping offers, inventory buys, or seasonal discount plans.
Pricing
Pricing
Profit Margin vs Markup for Online Sellers
Understand why margin and markup produce different percentages and how ecommerce sellers should use both.
Pricing
How to Run Discounts Without Destroying Margin
Use sale prices, coupons, bundles, and thresholds without turning profitable products into weak orders.
Pricing
Ecommerce Pricing Mistakes to Avoid
Avoid common pricing mistakes around fees, shipping, discounts, returns, taxes, and competitor comparisons.
Marketplace Fees
Marketplace Fees
How Marketplace Fees Affect Pricing
Learn how commission, fixed fees, payment fees, ads, and category rules change net proceeds.
Marketplace Fees
Etsy, eBay and Amazon Fee Comparison Guide
Compare fee structures across major marketplaces and learn why net proceeds matter more than gross price.