Overview

Amazon’s FBA Restock Inventory tool, embedded in Seller Central, automatically forecasts demand and suggests replenishment actions. Launched to replace manual spreadsheet calculations, it helps sellers keep shelves stocked while curbing excess storage fees. Understanding its mechanics is essential for any FBA seller who wants to protect revenue and improve inventory efficiency.

Key Points

• Demand‑driven SKU selection — The tool flags individual SKUs, such as a best‑selling “Eco‑Bamboo Cutting Board” (SKU CB001), that are projected to run low in the next 14 days.
• Optimal shipment timing — It calculates a restock date based on your declared supplier lead time; for a 10‑day overseas lead, the system may advise placing an order on March 5 to avoid a stockout on March 15.
• Quantity recommendations aligned with storage — If you store a “Premium Yoga Mat” in a standard‑size bin with a 2,000 cubic‑foot limit, the tool may suggest sending 120 units instead of 200 to stay within the cap.
• Customizable supply‑chain inputs — Sellers can override default values by entering a weekly replenishment frequency or a case pack of 24 units for a “Bluetooth Speaker” (SKU BS024).
• Built‑in storage‑limit awareness — The algorithm respects your Inventory Performance Index‑derived limits, preventing a shipment that would exceed the oversize allocation for “Heavy‑Duty Tool Kit” (SKU HTK09).

How the FBA Restock Inventory Tool Works

1. Data ingestion — The system pulls the past 90 days of sales for each SKU, such as 350 units sold of “Organic Green Tea” in July, and merges this with your current on‑hand inventory at Amazon fulfillment centers.
2. Lead‑time back‑calculation — Using the supplier lead time you entered (e.g., 12 days for a Chinese manufacturer), the tool works backward from the projected stock‑out date to determine the latest safe order date. For a product expected to deplete on April 20, the tool will flag April 8 as the cut‑off for placing a purchase order.
3. Capacity and cost balancing — It cross‑references the recommended shipment size with your available storage space and the estimated monthly storage fee. If sending 500 units of “Silicone Baking Mat” would trigger a $150 surcharge, the tool may lower the suggestion to 350 units to keep fees under control.