How Etsy fees work, with a worked example
Listing, transaction, payment processing and Offsite Ads fees explained with the current rates, official sources and a profit example.
Updated 4 Nov 2026
Guides
Short, practical guides that explain the numbers behind the tools. Every rate or rule we quote comes from an official page and carries the date we checked it.
How eBay fees work for US sellers, with a worked example
The final value fee, the per-order fee and the extra fees that can apply, with the current standard rates, the official source and a profit example.
Updated 4 Nov 2026
Markup vs margin: how to price your products
The difference between markup and margin, how to convert one into the other, and how to set a price that still gives you the margin you want after marketplace fees.
Updated 4 Nov 2026
How to find your real profit from your order exports
A step-by-step way to turn your marketplace order exports into profit per order, per marketplace and per month, and the mistakes that make profit look better than it is.
Updated 4 Nov 2026
Product photo size checklist for Etsy, eBay and Shopify
The photo sizes, shapes and file limits that Etsy, eBay and Shopify state in their own help pages, with a checklist for preparing a set of product images.
Updated 4 Nov 2026
Photo and signature checklist for online applications
How to check the size, file size and shape of a photo and signature before you upload them to an application, with the UK digital passport photo rules as an example.
Updated 4 Nov 2026
How to fix "Unexpected token" JSON errors
What an "Unexpected token" JSON parse error means, the eight mistakes that cause most of them, and a step-by-step way to find the exact character that breaks your JSON.
Updated 5 Nov 2026
Why webhook signatures fail to verify and how to debug them
How HMAC webhook signatures work, the common reasons a correct secret still gives a different signature, and a checklist to find the cause without guessing.
Updated 5 Nov 2026
Base64 vs URL encoding: when to use which
What Base64 and percent (URL) encoding each do, why neither is encryption, how URL-safe Base64 differs, and which one to use for query strings, tokens, files and form data.
Updated 5 Nov 2026