Amazon took $15.04 of a typical $30 sale in 2026 — half the price — before you even count the item cost. If your own numbers look worse than that, the culprit is almost always one of five leaks. None of them is "Amazon raised fees" in general; each has a specific, fixable cause.
The useful frame is not the total bill but its shape. A stack where fulfillment dominates says packaging. One where referral towers says category choice. One that only grows in autumn says storage. Find the fattest line on your fee preview, and you have found the leak before you change anything.
| Cause | How it shows up | The fix |
|---|---|---|
| Oversized box (dimensional weight) | A 10 oz product in a 12 × 8 × 4 in box bills at 384 ÷ 139 ≈ 2.76 lb, clearing the 2.75 lb band into the 3 lb rate — a $2.47 jump per unit versus the 0.75 lb band | Shrink the box until dimensional weight is at or below actual weight |
| High-referral category | Device accessories pay 45%; clothing tops out at 17%; beauty switches from 8% to 15% above $10 | Check whether your listing sits in the right category and whether your price crosses a tier |
| Peak-season storage | Storage runs $0.78/ft³ off-peak but $2.40/ft³ from Oct 15, 2026 to Jan 14, 2027 | Cut average days in FBA below 60; liquidate slow stock before Q4 |
| Fuel & logistics surcharge | 3.5% of the fulfillment fee since Apr 17, 2026 — $0.15 on a $4.20 fee, $0.23 on a $6.67 fee | Lower the fulfillment band and the surcharge falls with it |
| Returns | Each return costs referral + fulfillment + a processing fee; apparel runs 20–30% | Tighten size charts, imagery and product expectations per category |
Open the reports and match the leak. This takes about ten minutes:
You do not need all five fixes this month. Fix the fattest line, re-run the numbers on that SKU, then move to the next. Fee reduction is iterative — and the report comparison you did in ten minutes above is the same check that tells you whether the fix actually landed.
Enter your box dimensions, category and ad spend — the calculator applies the 2026 banded rate card and shows which line is heaviest:
Usually packaging. A light product shipped in an oversized box bills on dimensional weight (US: L × W × H inches divided by 139), so a 10 oz item in a 12 × 8 × 4 in box bills at 2.76 lb and jumps from the 0.75 lb band to the 3 lb band — about a $2.47 per-unit fee increase before anything else is counted.