Overview

Amazon has silently reinstated per‑ASIN restock limits for Fulfillment by Amazon (FBA) sellers, capping the quantity of each individual product that can be shipped to its fulfillment network. The limits appeared in early February 2024 without any formal notice in Seller Central, and they are already blocking inbound shipments across dozens of categories. Sellers who depend on large, pre‑planned shipments must adjust their replenishment tactics or risk stock‑outs during critical sales periods.

Key Points

• Per‑ASIN caps reintroduced — Sellers can no longer send unlimited units of a single SKU; a typical limit for a fast‑moving item like a wireless charger is around 8,000 units per 90‑day window.
• Threshold tied to 90‑day supply — Amazon calculates the ceiling using the product’s recent sales velocity, so a toy that sold 1,200 units in the last month may be allowed roughly 108,000 units (1,200 × 90) across on‑hand, in‑transit, and inbound stock.
• No official communication — The change was not announced via the usual Seller Central alerts; sellers discover the restriction only when the “Create Shipment” button is disabled for a specific ASIN.
• Active enforcement — As of the first week of February, the system is already rejecting new shipment plans for affected SKUs, forcing sellers to pause or split their shipments.
• Impact varies by category — Early data shows home‑goods, electronics, and toys are hit hardest, while low‑turnover categories such as office supplies see higher caps.

How Restock Limits Work

1. Data collection — Amazon pulls the last 30‑day sales data for each ASIN, adds current on‑hand inventory in its warehouses, and includes units already in transit. Example: A seller of ceramic mugs sold 500 units in the past month, has 2,000 units stored, and 300 units on the way; the system totals 2,800 units.
2. Threshold calculation — The platform multiplies the average daily sales rate by 90 days to derive a “90‑day supply” ceiling. Example: 500 units sold in 30 days equals ~16.7 units per day; 16.7 × 90 ≈ 1,500 units, so the seller may not exceed 1,500 total units for that SKU.