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Key fact: Your true Amazon cost per unit is not the FBA fulfilment fee alone. It is the referral fee, the fulfilment fee for the unit's size and weight tier, monthly storage, the 3.5% fuel and logistics-related surcharge that applies to US FBA fulfilment fees from 17 April 2026, your inbound placement, the peak-season fulfilment uplift that applies to US FBA fees from 15 October 2026 to 14 January 2027 (billed by ship date, and charged before the fuel surcharge), COGS and PPC — and each of those moves on its own schedule. The free Cost Tracker keeps all of those lines against every SKU, so margin erosion is visible before it reaches cash.
| Date | SKU | ASIN | Item Name | Type | Amount | Quantity | Unit Price | Vendor | Actions |
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Export all cost records as CSV — openable in Excel.
Rates last verified: · Source: Amazon 2026 US rate card · Latest fee updates
Track the full landed cost of each SKU: product purchase cost (COGS), first-mile shipping, customs duties, and Amazon fees such as referral and FBA fulfillment. Every cost item feeds into your true per-unit profit.
Net profit = selling price − (product cost + shipping + customs + Amazon fees). The tool shows the result in both dollars and margin percentage so you can spot underpriced SKUs instantly.
Yes. Costs are tracked per SKU, so you can compare products side by side and see which ones actually make money after all landed costs and Amazon fees.
Enter the fees from your Seller Central fee preview, or run your product through the FBA Fee Simulator first and paste the resulting fulfillment and storage figures here.
Yes, it is completely free. Open the page, enter your SKU costs, and get your full profit breakdown — no subscription required.
❓ Amazon FBA Cost Calculator — Frequently Asked Questions → fees, limits, and worked examples
Every rate card behind this tool comes from our open dataset — 2026 Amazon FBA fee snapshots (CC BY 4.0). What changed between monthly snapshots is dated in the Amazon FBA fee change log. Machine-readable JSON, free to cite.