Every cloud-based reimbursement tool takes a monthly fee or a cut of what you recover. FBA Fee Auditor audits your reports locally — your data never leaves your computer, you pay once, and you keep 100% of what you recover.
Get the Offline AuditorNot ready to audit your whole catalog yet? Use this free checker to verify whether the FBA fulfillment fee on a single item is correct. Enter the item's size tier, dimensions, weight and the fee Amazon charged — it recalculates the correct 2026 fee against Amazon's official tables right here in your browser. Nothing is uploaded; it runs 100% offline.
100% offline. Your inputs never leave your device. Fulfillment fees only — storage, referral and other fees are not checked here. Reconcile with your current Seller Central fee before disputing.
Need to audit your whole catalog at once and get ready-to-send dispute letters? Get the full FBA Fee Auditor →
The most common and costly error. Amazon assigns a higher size tier than your product qualifies for and applies it to every order until corrected.
Storage fees are based on cubic footage. If Amazon has wrong dimensions on file, you overpay every single month. Compounds over time and across SKUs.
If your ASIN is classified in the wrong category, you're paying the wrong referral fee percentage on every transaction. Electronics vs Toys is a 7-point difference.
Amazon sometimes applies aged inventory surcharges before your products actually hit the 181-day storage threshold. Each premature charge is recoverable.
Amazon does not notify you when it overcharges you. The process to find and recover those charges must be initiated by you — before the claim window closes permanently.
Go to Reports → Fulfillment in Seller Central. Download the FBA Fee Preview Report for fee errors and the Inventory Ledger Report for lost or damaged inventory. These CSV files are the only input you need — no account setup, no API keys.
FBA Fee Auditor reads your CSV files locally and flags every ASIN where the charged fee does not match what Amazon's own published fee schedule says you should have paid. No data leaves your machine. Results are ready in under 60 seconds regardless of catalog size.
File separate cases for each fee type — fulfillment fee errors, storage fee errors, and referral fee errors. Include the specific order numbers, the amount charged, the amount that should have been charged, and the per-unit difference. Precise documentation significantly increases approval rates and speeds resolution.
For fulfillment fee overcharges, include the ASIN, relevant order IDs, the fee charged, and the fee that should have applied per the published size tier schedule. For inventory claims, provide the shipment ID and a reconciliation showing the discrepancy between units shipped and units received by the fulfillment center.
Simple fulfillment fee overcharge claims resolve within 3–7 business days. Inventory discrepancy cases take 2–4 weeks and often require follow-up. A first-attempt denial does not mean the claim is invalid — escalate with additional documentation. Amazon's reimbursement teams review escalations separately from initial case handlers.
Sellers with 10+ active SKUs who audit quarterly typically recover $200–$800 per cycle. Sellers who audit their full catalog for the first time often find 12–18 months of accumulated overcharges across multiple fee types, with total recoveries ranging from $2,000 to $8,000. The earlier you audit after a fee change, the more of the claim window remains open.
Your FBA fee reports contain your exact margins, COGS estimates, and unit economics across every SKU. Uploading this to a SaaS platform gives a third party a complete picture of your business profitability. An offline tool processes the same data locally — identical audit results, zero exposure of your seller data to external servers.
Every day you wait is a day closer to losing the right to claim. Audit offline — in minutes.
Four free tools, one job: catch and recover the FBA fees Amazon got wrong. Start anywhere — they all point back to the full auditor.
Disclaimer: FBA Fee Auditor is an independent tool created by Smart Local Tools. It is not affiliated with, endorsed by, or in any way officially connected to Amazon.com, Inc. or any of its subsidiaries. Amazon, Fulfillment by Amazon (FBA), and Seller Central are trademarks of Amazon.com, Inc.
The fee tables included in this tool are based on publicly available information from Amazon Seller Central and reflect rates as of January 15, 2026 (US) and February 1, 2026 (DE). Fee structures may change at any time. Smart Local Tools makes no guarantee that the fee tables are complete, current, or error-free. Always verify results against the official Amazon Seller Central fee schedule before filing a reimbursement case.
This tool is provided "as is" without warranty of any kind. Smart Local Tools is not liable for any financial decisions made based on the output of this tool. Use of this tool constitutes acceptance of these terms.