When is storage billed?

Monthly, based on the average daily volume held during the month.

What is the aged inventory surcharge?

An additional per-unit fee for inventory stored over 180 and 365 days.

Can I reduce storage cost?

Smaller, more frequent shipments and tighter inventory turns are the main levers.

Amazon FBA Storage Fee Calculator

Storage is billed per cubic foot per month, and the rate roughly triples in Q4.

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Why Q4 storage hurts

Amazon's standard storage rate is roughly $0.87 per cubic foot per month from January to September, and jumps to around $2.40 during October to December. Sending a large shipment in September means paying peak rates while it sits.

Aged inventory surcharges apply after 180 and 365 days, and they are far more punishing than the base rate.

Related: see how the same sale nets out on every marketplace. Compare platforms

FAQ

When is storage billed?: Monthly, based on the average daily volume held during the month.
What is the aged inventory surcharge?: An additional per-unit fee for inventory stored over 180 and 365 days.
Can I reduce storage cost?: Smaller, more frequent shipments and tighter inventory turns are the main levers.

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Storage is a monthly bill on stock that has not sold

Q4 rates roughly triple. Selling from your own warehouse removes the aged-inventory surcharge entirely.

See Shopify pricing →

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