Amazon Storage Fee Calculator

FBA storage is billed monthly per cubic foot, with two possible surcharges on top: one for holding too much stock relative to what sells (utilization) and one for stock that's sat too long (aged inventory). Rates last checked 30 Sep 2026.

The same 400 units in October to December, at the $2.40 peak rate, cost $100.00 instead: storage triples in Q4 for standard-size items.

• Utilization surcharge. Applies to units aged over 30 days once your storage utilization ratio (shown on the FBA Dashboard) passes 22 weeks of cover. At 28 to 36 weeks it adds $0.76 per cubic foot for standard-size items; the calculator's example at that band on 320 aged units adds $38.67, bringing the month's total to $71.17.
• Aged inventory surcharge. Charged per unit past 181 days old, checked on the 15th of the month, and it's the greater of a per-cubic-foot and a per-unit rate. At 366 to 455 days on 120 units, the example adds $86.25, for a total of $118.75.
• New sellers under 365 days, small storers and some other cases are exempt from the utilization surcharge; check the FBA Dashboard for your own ratio rather than assuming.

• Ship smaller and more often instead of sending months of stock at once. It lowers your utilization ratio and reduces how much can age past 180 days.
• Check FBA Inventory weekly for the days-of-supply and aged-inventory columns, and submit a removal or disposal order by 11:59 p.m. PT on the 14th to dodge next month's aged inventory charge.
• Clear slow stock before Q4. Storage triples from October to December, so units that will still be sitting there in October cost far more to hold than to remove in September.