Every tool you use gets its numbers from the platform. That's the same source that's charging you. We check every fee against the published rate cards — independently. So you know which numbers are right and which aren't.
| Fee | Charged | Rate card | Diff | Status |
|---|---|---|---|---|
| Referral fee (15%) | $6.00 | $6.00 | — | ✓ Match |
| FBA fulfilment | $9.07 | $9.07 | — | ✓ Match |
| Fuel surcharge (3.5%) | $0.32 | $0.32 | — | ✓ Match |
| Monthly storage | $0.42 | $0.42 | — | ✓ Match |
| Packaging surcharge | $1.51 | $0.00 | $1.51 | ⚠ FLAG |
| Refund admin fee | $0.12 | $0.06 | $0.06 | ⚠ FLAG |
You're paying $1.51/unit because you're not enrolled in SIPP (Ships in Product Packaging). Certification is free. Products under 20 lb can self-test — no lab, no cost.
Source: sellercentral.amazon.com/help/… · Verified 18 Apr 2026
This is one product. Most sellers have dozens. What's hiding in yours? →
SIPP certification. Free enrolment. Removes the $1.51/unit packaging surcharge.
No trade-off.
One of seven findings on this product →Same product. Amazon: $9.31 in platform fees. Walmart: $6.76 with new-seller programmes.
See the full comparison →
Amazon added a 3.5% fuel surcharge in April 2026. It's not on the rate card page. Your calculator doesn't include it.
at 10,000 units.
Three fee changes and what they cost →Price, weight, category, how you ship it. Any platform — Amazon, eBay, Walmart, Shopify.
Every published rate applied to your product. Not a total — the full structure. Every source linked.
Fees you didn't know about. Programmes you qualify for. Settings that are costing you money. Each one with the dollar amount and what to do about it.
Rate cards change. Programmes launch. Your analysis updates automatically. You see the impact the day it hits.
Every number we compute is downloadable. Fee breakdowns, floor prices (the minimum you can charge and still profit), ACoS ceilings (the maximum you can spend on ads before losing money), margin analysis — all in a single CSV using your platform's own fee names. Open it in Excel. Hand it to your accountant. Feed it to your repricer.
Most tools lock your data inside their dashboard. We think the analysis is yours. Take it anywhere.
Built by Sam — 15 years in institutional finance. CFA® charterholder. Read more →
14-day free trial. Founding member rates locked for life.
Pre-Entry Check — $9.99 one-time. Not selling yet? See the real cost before you commit →
All figures from published platform rate cards. 8,938 fee records across 26 marketplaces. Sources linked on individual pages.
Upload your settlement or enter your product. Every fee checked against the published rate card. Every source linked. Launching September 2026.