Guides
Fee structures, margin maths and pricing decisions, explained without the fluff.
- Amazon FBA Fees Explained: Referral, Fulfillment and Storage
Every fee Amazon charges an FBA seller, how each one is calculated, and the three that most often turn a profitable product into a loss-making one. - How to Calculate Break-Even Before You Launch
The one calculation that tells you whether a product is worth listing, before you spend money on inventory. - Why Your Shop Is Busy But Not Profitable
Five places where margin quietly leaks out of a marketplace business, and how to find them before they compound. - The Hidden Cost of Free Shipping
Free shipping is not a discount, it is a pricing decision with a fee multiplier attached. Here is the arithmetic. - Depop vs Poshmark: Fee Comparison for Resellers
Depop charges US sellers no selling fee at all. Poshmark takes a flat 20%. The real gap is 16 percentage points, not the few dollars most comparisons claim. - eBay Fees Explained: Final Value Fees and Promoted Listings
How eBay calculates final value fees, when a store subscription pays for itself, and what promoted listings actually cost per sale. - Etsy Fees Explained: What You Actually Keep in 2026
A complete breakdown of Etsy's listing, transaction, payment and offsite ads fees, with a worked example on a real order. - How to Price for Profit on Any Marketplace
A single pricing formula that works across Etsy, eBay, Amazon, Shopify and TikTok Shop, with the fee terms that change between them. - Mercari vs Poshmark Fees: Which Platform Pays You More?
A price-by-price comparison of Mercari and Poshmark payouts, including the flat fee that changes everything below $15. - Shopify Costs Explained: Subscription, Payments and Apps
The subscription is the smallest part of running a Shopify store. Here is where the rest of the money actually goes. - Shopify vs Etsy: The Real Cost at 100 Orders a Month
A side-by-side cost model of running 100 orders through Etsy versus Shopify, including the costs Etsy does not charge. - TikTok Shop Fees Explained for New Sellers
Commission, payment processing and creator affiliate costs on TikTok Shop, and why the 6% headline rarely survives contact with a real order. - TikTok Shop vs Amazon FBA: Fee Reality Check
TikTok Shop's commission looks far lower than Amazon's 15% referral fee. Once fulfilment is counted, the picture changes. - Walmart Marketplace Fees Explained
Referral fees by category, WFS fulfillment costs and the real reason Walmart is cheaper on paper but harder in practice.