Amazon Fee & Ad Spend Analysis

Six worked analyses, each built on Amazon’s own published rates and each showing the arithmetic. The products and accounts in them are modelled rather than real, which is stated on every page — the fees are not.

They exist because most of what circulates about Amazon economics is either a vendor’s marketing or a number repeated until it sounded true. Every figure below can be checked against a rate card or a Seller Central report.

Where the Margin Goes on a £34 Amazon SKU
How a 0.6-Inch Measurement Error Costs $1,116 a Quarter
The 2026 Bulky Fee Restructure: Who Won and Who Lost
Diagnosing an Amazon Traffic Decline: The 20-Minute Sequence
What £12,000 of Monthly Amazon Ad Spend Actually Buys
Rebuilding a 110-Character Amazon Title in 75

Find out what Amazon is really costing you.

The Amazon Forensic Growth Audit names the search terms costing more than they bring back, the keywords you are not indexed for, the ASINs charged on the wrong size tier, and the markets your catalogue is ready for. Ranked by what to fix first, and yours to keep either way. Tick the Loom box on the audit form for a personalised 5-minute Loom teardown of your top ASIN.