FBA Storage Fee Calculator
Estimate your monthly Amazon storage bill, including the Q4 peak rate jump and the aged inventory surcharge that kicks in after 180 days. Enter your unit count and dimensions to see what your stock costs just to sit there.
All calculatorsFBA storage fees
Your Inventory
Your inventory
Monthly (Jan–Sep)
$72.22
Monthly (Oct–Dec)
$222.22
Aged surcharge / mo
$0.00
Estimated annual storage cost
9 off-peak months + 3 peak months, before any aged surcharges
$1,316.64
92.6 total cubic feet (0.185 cu ft per unit). Rates reflect Amazon's published US fee schedule and change periodically. Confirm current rates in Seller Central.
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How FBA Storage Fees Work
Amazon charges you for every cubic foot your inventory occupies in its fulfillment centers, every month, whether the product sells or not. Standard-size items run about $0.78 per cubic foot from January through September, then jump to $2.40 per cubic foot for October through December. Oversize items pay less per cubic foot but take up far more room per unit.
The fee most sellers underestimate is the aged inventory surcharge. Once a unit has sat in a fulfillment center for more than 180 days, Amazon adds a second monthly charge on top of regular storage. It starts at $0.50 per cubic foot and climbs every 30 days, reaching $6.90 per cubic foot (or $0.30 per unit, whichever is greater) after a year and $7.90 per cubic foot (or $0.35 per unit) past 455 days. Stock that crosses a year old can cost more to store than it earns when it finally sells.
Storage fees are a cash flow problem disguised as an expense line. Every dollar sleeping in an FC is a dollar you cannot put into your next purchase order, and the fees compound the longer it sits.
2026 US Storage Rates at a Glance
Monthly storage (per cu ft)
| Standard, Jan–Sep | $0.78 |
| Standard, Oct–Dec | $2.40 |
| Oversize, Jan–Sep | $0.56 |
| Oversize, Oct–Dec | $1.40 |
Aged inventory surcharge (per cu ft / mo)
| 181–210 days | $0.50 |
| 211–240 days | $1.00 |
| 241–270 days | $1.50 |
| 271–300 days | $5.45 |
| 301–330 days | $5.70 |
| 331–365 days | $5.90 |
| 366–455 days | $6.90* |
| 456+ days | $7.90* |
*Or the per-unit minimum, whichever is greater: $0.30 per unit at 366–455 days, $0.35 per unit at 456+ days.
FBA Storage Fee FAQs
Amazon measures the volume of your inventory in cubic feet (length x width x height, divided by 1,728 to convert cubic inches to cubic feet) and multiplies it by a per-cubic-foot rate. Standard-size items run about $0.78 per cubic foot from January through September and $2.40 per cubic foot in October through December. Oversize items are cheaper per cubic foot ($0.56 off-peak, $1.40 in Q4) but occupy far more space per unit.
Storage fees for a given month appear on your payments report between the 7th and 15th of the following month. The aged inventory surcharge is assessed on the 15th of each month, based on a snapshot of how long each unit has been sitting in fulfillment centers on that day.
It is an extra monthly per-cubic-foot charge on inventory that has been in Amazon fulfillment centers for more than 180 days. It starts at $0.50 per cubic foot at 181 days and climbs steeply: $5.45 at 271 days, $6.90 per cubic foot (or $0.30 per unit, whichever is greater) once stock passes 365 days, and $7.90 per cubic foot (or $0.35 per unit) past 455 days. It is charged on top of the regular monthly storage fee.
Ship inventory in smaller, more frequent batches from October through December instead of stockpiling in September, and submit removal or liquidation orders for slow movers before October 1. Anything sitting unsold through Q4 pays nearly triple the off-peak rate for standard-size items.
Yes. Amazon updates its fee schedule periodically, and some accounts also incur a storage utilization surcharge when inventory levels are high relative to sales. Treat this calculator as a close estimate and confirm current rates in Seller Central before making sourcing decisions.
Storage Fees Are Just One Leakin Your P&L
Futureproof books every Amazon fee into your ledger as it lands, storage, placement, and removal included, so each month of charges sits against the SKUs that caused it and your margin per SKU is the number after fees.
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