Seller guides
Practical ecommerce margin guides for sellers.
Use these guides with the calculators to understand fee categories, formulas, and pricing mistakes before you launch or scale a product.
5 min read · Published 2026-07-06
Amazon Referral Fee by Category: How to Estimate It
Understand how referral fee rates affect Amazon product research and minimum profitable pricing.
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6 min read · Published 2026-07-06
Etsy Pricing Formula for Handmade Sellers
Build an Etsy price from materials, labor, packaging, fees, ads, and target profit.
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5 min read · Published 2026-07-06
Etsy Profit Margin Example with Ads and Shipping
A practical Etsy margin example showing how fees, ads, shipping, and packaging change profit.
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6 min read · Published 2026-07-06
Shopify Break Even ROAS: When Ads Stop Making Money
Calculate the break-even ROAS a Shopify product needs before scaling paid ads.
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5 min read · Published 2026-07-06
Shopify Shipping Cost Pricing: Free Shipping Without Losing Margin
Estimate how free shipping, packaging, and carrier costs should be built into Shopify prices.
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5 min read · Published 2026-07-06
TikTok Shop Affiliate Commission and Profit Planning
Model TikTok Shop affiliate commission before offering creators a promotion rate.
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6 min read · Published 2026-07-06
Import Duty and Landed Cost Example for Ecommerce Sellers
See how product cost, freight, duty, customs fees, and domestic delivery create landed cost.
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6 min read · Published 2026-07-06
Marketplace Fee Comparison: Amazon vs Etsy vs Shopify
Compare how marketplace fees and channel economics change profit for the same product.
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6 min read · Published 2026-07-06
Product Pricing Formula for Ecommerce Sellers
Use a target margin formula to set ecommerce prices after costs, fees, shipping, and ads.
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