Overview

Amazon rolled out a comprehensive overhaul of its 2024 FBA storage‑fee structure, altering both the monthly inventory charges and the surcharge applied to aging stock. The changes take effect at different points throughout the year, and sellers who rely on Amazon’s fulfillment network must adjust their inventory strategies to avoid unexpected cost spikes.

Key Points

• Revised per‑cubic‑foot rates — Amazon updated the monthly storage price per cubic foot for standard‑size and oversize items, with new rate tiers appearing at various dates in 2024.
• Seasonal price differentials stay — Rates for the October‑December peak window remain markedly higher than the January‑September off‑peak period, forcing sellers to plan Q4 inventory more tightly.
• Aged inventory surcharge replaces LTSF — The former long‑term storage fee has been retired; a tiered surcharge now applies once units cross defined age thresholds.
• Lower age thresholds introduced — New surcharge brackets begin at 181‑270 days and 271‑365 days, in addition to the existing 365‑plus‑day tier, meaning slow‑moving items incur fees sooner than in prior years.
• Small‑and‑light items have separate tables — Products classified in the “small‑and‑light” tier are subject to distinct rate schedules, so sellers with high‑volume lightweight SKUs must consult the specific tables for those items.
• Reporting tools remain essential — The FBA Inventory Age and FBA Storage Fees reports continue to be the primary sources for monitoring both monthly fees and upcoming surcharge exposure.

How the Monthly Storage Fees Work

1. Calculate daily average volume — Amazon measures the average cubic‑footage a seller’s inventory occupies each day of the month; for example, a seller with 300 standard‑size units that together fill 45 cubic feet would have a daily average of 45 cubic feet.
2. Apply the appropriate per‑cubic‑foot rate — The daily average is multiplied by the rate that matches the product’s size tier and the current season; a seller storing the same 45 cubic feet in September would be charged the lower off‑peak rate, while the same volume in November would be billed at the higher peak rate.