Amazon FBA Storage Fees 2026: US Rates and Cost Controls

Verified 2026 US Base Monthly Storage Rates

Amazon charges the base monthly inventory storage fee using a product's packaged volume and average daily inventory stored during the month. Amazon's published US rates for non-dangerous goods are:

Dangerous goods have different rates. These are base rates only, not all-inclusive monthly storage quotes. Confirm the product size tier, classification, and current fees in Seller Central.

Illustrative calculation: If a non-dangerous standard-size product occupies 0.05 cubic feet and averages 100 units in storage, the base monthly fee at the January–September rate is 100 × 0.05 × $0.78 = $3.90. At the October–December base rate, the same storage volume costs $12.00 before any applicable surcharge.

When the Storage Utilization Surcharge Applies

Amazon's US help documentation says the utilization surcharge applies only when all of these conditions are met for the relevant product size tier:

• The account uses a Professional selling plan.
• The first US FBA shipment was received more than 365 days ago.
• Average daily inventory volume for the size tier is at least 25 cubic feet.
• The storage utilization ratio for that size tier exceeds 22 weeks.

Amazon calculates the ratio from stored volume relative to shipped volume over the prior 13 weeks. When the surcharge applies, it is assessed on inventory aged more than 30 days in addition to the base monthly storage fee. It does not automatically apply to every slow-selling ASIN or every seller with overstock.

Review the FBA dashboard and Monthly Storage Fees report rather than using a generic days-of-stock threshold as a substitute for Amazon's ratio.

Aged Inventory Surcharge: Watch the 15th of Each Month

Amazon US assesses applicable aged inventory surcharges using inventory aged at least 181 days on the 15th of each month. This is a separate charge from ordinary monthly storage and the utilization surcharge. Amazon applies age accounting using a first-in, first-out method across the fulfillment network; shipping a newer physical unit does not necessarily preserve the oldest age bucket.

From January 16, 2026, the US rate schedule includes age bands for 181–210, 211–240, 241–270, 271–300, 301–330, 331–365, 366–455, and 456+ days. Selected categories, including clothing, shoes, bags, jewelry, and watches, have exclusions for the earlier 181–270-day bands. Higher age bands can also have per-unit minimums, so the calculation is not always simply cubic feet multiplied by a rate.

The Low-Inventory-Level Fee Is Not a Storage Fee

Amazon US changed the low-inventory-level fee on January 15, 2026. It now evaluates historical days of supply at the seller-FNSKU level, rather than the parent-ASIN level. Eligible seller-FNSKUs are subject to the fee only when both their shorter-term 30-day and longer-term 90-day historical days of supply are below 28 days.

The fee is charged per eligible unit shipped, not as an extra monthly charge on cubic feet in storage. Amazon expanded coverage to small and large bulky products and exempted Grocery; slower-moving products and other exclusions also apply. Review the current marketplace eligibility table rather than assuming every item with less than four weeks of stock pays the fee.

Sending in additional inventory may lower a future low-inventory fee risk while raising monthly storage or utilization exposure. The commercial decision must account for both sides.

Five-Step Inventory Cost Review

These are Seller Scale operational recommendations, not guarantees of waived fees. Reconcile the next billing cycle against the account's fee reports.

Official Amazon Sources

• Amazon US: Monthly inventory storage fees and utilization surcharge
• Amazon US: Aged inventory surcharge, effective 2026 changes
• Amazon US: Low-inventory-level fee, January 2026 changes
• Amazon Seller Forums: 2026 aged-inventory guidance

Editorial review: November 2, 2026. All rates refer to Amazon US and are subject to change. Seller Central's account-specific fee estimates and current Amazon help pages take precedence.