Your profit tracker says Amazon charged you $4.50 for fulfilment. Where did it get that number? From Amazon. If Amazon applied the wrong schedule and the fee should have been $3.95, your tool reports $4.50 anyway. So does every other tool. Nobody checks.
Upload your settlement report. We calculate what each fee should be — from the published rate card, not from the platform — and compare. Every difference flagged. Every source linked.
| 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. The rate card also publishes the enrolled rate: $0.00.
Source: sellercentral.amazon.com/help/… · Verified 18 Apr 2026
The published formula is the lesser of $5.00 or 20% of the referral fee. On this product's $6.00 referral fee, that's $1.20 per refund event — $0.06/unit at a 5% return rate. Your settlement shows $0.12/unit, twice the published formula.
Source: sellercentral.amazon.com/help/… · Verified 18 Apr 2026
Six fee lines on one product. Four match — the platform charged what the rate card says. Two don't.
The packaging surcharge: $1.51/unit. You're paying it because you're not enrolled in SIPP. Certification is free. At 1,200 units/year: $1,812 you don't need to be paying.
The refund admin fee: $0.06 more than the published formula per unit. Small per unit. At your return volume: adds up.
This is one product. The average FBA seller has 15–50. What's in yours? →
Download it from Seller Central (Amazon), Seller Hub (eBay), or Seller Center (Walmart). Upload the CSV.
For each fee line, we calculate what the published rate card says you should have been charged — your category, your weight, your dimensions. Not what the platform told you. What the published schedule says.
Matched lines confirmed. Flagged lines show the rate card amount, what you were charged, the difference, why it might have happened, the source URL, and what it costs you per year at your volume.
Referral fees. FBA/WFS fulfilment fees. Monthly storage. Inbound placement. Fuel and logistics surcharges. Subscription fees. Refund administration fees. Regulatory surcharges. Published FX spreads. Every fee that has a published rate card — checked against that rate card, not against the platform's own data.
Advertising costs (Sponsored Products, Sponsored Brands, PPC) are auction-based. There is no published rate card for an auction price. These costs are handled through margin impact analysis — we compute what your ad spend does to your margins, break-even ACoS, and promotional headroom. But we can't reconcile a cost that has no published reference rate.
Shopify's fee structure is transparent by design. Plan-based rates on one page. The seller can verify their processing rate in seconds. There is nothing to reconcile that a seller can't check themselves. We analyse Shopify costs through direct rate computation instead. We say this explicitly — claiming to reconcile a fee structure that doesn't need reconciling would be dishonest.
Wrong referral band — $2,520/year on one product. Clothing and Accessories isn't 15% flat — it's 17% on items over $20, a marginal rate published in the Amazon Referral Fee Schedule (category_reference Row 13). A $34.99 shirt pays $5.95 in referral, not the $5.25 most calculators assume — $0.70/unit. At 300 units/month: $2,520 in understated fees the settlement never questions.
Apparel FBA schedule not modelled — $1,980/year. Apparel has its own FBA fulfilment schedule (fee_database Row 366). A calculator using the non-apparel rate shows $3.95; the apparel rate is $4.50 — $0.55/unit understated on every unit. At 300 units/month: $1,980. The rate card is right. The classification is wrong.
Programme you qualify for but never enrolled in — $1,812/year. SIPP certification is free. Your product qualifies. You're not enrolled. Every unit pays a $1.51 packaging surcharge that enrolment eliminates (fee_database Row 1369). The settlement charge is "correct" — the non-enrolled rate. The rate card also publishes the enrolled rate: $0.00. You're paying the wrong one. At 1,200 units/year: $1,812.
Fuel surcharge missing from the model — $1,950/year. Amazon applies a 3.5% fuel and logistics surcharge on every FBA fulfilment fee (fee_rules Row 7). It isn't on the main rate card page, and most calculators don't include it. Across a mixed catalogue, that's $1,950/year in fees you're paying but not tracking.
Settlement reconciliation launches with early access in September 2026. Upload your report. Every fee line checked against the rate card. Every difference flagged with dollar amounts and source links.
Rate-card fees only — advertising and auction-based costs are analysed separately. Shopify fees verified through direct rate computation. Every rate card fee computed from published platform documentation. 1,257 source URLs tracked. Last verified 25 June 2026.