storage fees amazon fba are charges sellers incur for using Amazon’s fulfillment centers to store inventory. Fees vary based on item size, time of year, and how long the product has been stored. Standard rates apply monthly, but long-term storage fees can accumulate if items remain unsold for more than 181 days. Sellers should monitor their inventory through Amazon’s Inventory Dashboard to avoid high fees. Strategic inventory management, sales forecasting, and product bundling can help reduce storage costs and improve profitability.