Referral by category. FBA fulfillment by size tier and 2026 price band. Storage by volume. The fuel surcharge most calculators still hide. Click any line to see exactly where the number comes from.
Every line of the sheet names the table it came from and the day that table was verified.
38 fee categories with their real shapes: flat, tiered by price, and marginal portions. With the per-item minimum where the schedule has one.
US referral fee schedule · verified 2026-09-11Since January 15, 2026 the fulfillment fee depends on the price band too, not just size and weight. Under $10, $10–$50, over $50 — modeled, with the row the card names.
US FBA rate card 2026 · effective Jan 15Volume from the package dims, Jan–Sep vs Oct–Dec rates, your own days-in-stock assumption. An estimate that says it is one.
Monthly storage rates · verified 2026-09-11Every fee line opens to its table and verification date. Fee data is honest about its age, and about Amazon's own 48–72h page lag.
Each line carries its own sourceInstall once; after that every product page you open gets its sheet by itself.
One click from the Chrome Web Store. No account, nothing leaves your browser.
The profit pill appears under the price. The category is matched from the page; you can correct it.
The full breakdown opens line by line. Click a line to see its source and verification date.
Same tables, same math, same sources as on this page. This is what mounts under the price of a real product page.
The extension is in the Chrome Web Store review queue. The listing goes public with one click once review passes — this button starts working that same day.