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Amazon Long-Term Storage Fee Calculator

The aged-inventory surcharge Amazon adds on top of monthly storage once units sit past 180 days.

Long-term storage surcharge = units × the greater of (cubic feet per unit × surcharge rate) or the per-unit minimum. The surcharge bills monthly on top of the base fee from the Amazon storage fee calculator, and it escalates with age: modest per-cubic-foot rates start at 181 days, and inventory past 365 days pays $6.90 per cubic foot or $0.15 per unit, whichever is greater. At that top tier, 200 units at 0.3 cu ft each cost $414 every month just for sitting there. Enter your unit count, volume and the rate for your age tier; the inventory aging calculator shows how much of your stock is drifting toward these tiers.

Amazon Long-Term Storage Fee Calculator — your numbers

Monthly surcharge total

$414.00

Surcharge per unit

$2.07

Estimate only. Results reflect exactly the numbers you enter — verify against your own accounting before making pricing decisions.

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Fee defaults last reviewed 2026-07-30. Platforms change their fees — every rate above is editable, so enter your current numbers for an exact result.

Worked examples

365+ day stock, standard size

Units past 180 days 200
Cubic feet per unit 0.3
Surcharge rate $6.90
Per-unit minimum $0.15
Monthly surcharge total $414.00
Surcharge per unit $2.07

At $6.90 per cu ft, 200 aged units cost $414 a month on top of base storage.

Tiny item where the minimum bites

Units past 180 days 500
Cubic feet per unit 0.02
Surcharge rate $6.90
Per-unit minimum $0.15
Monthly surcharge total $75.00
Surcharge per unit $0.15

By volume this would be 14¢ a unit; the $0.15 per-unit minimum applies instead: $75 a month.

Frequently asked questions

When do Amazon long-term storage fees start?

At roughly the six-month mark. Amazon's aged-inventory surcharge begins once units have sat 181 days, with escalating per-cubic-foot rates through the 181–270 and 271–365 day tiers, then the steepest tier past 365 days: $6.90 per cubic foot or $0.15 per unit, whichever is greater. Amazon snapshots inventory age monthly (around the 15th) and bills the surcharge with that month's storage.

Is this charged instead of, or on top of, monthly storage?

On top. The base monthly storage fee applies to every unit in the network regardless of age; the aged-inventory surcharge stacks on units past the 181-day threshold. A slow mover in the 365+ tier pays both, and the combined bill often exceeds the unit's remaining margin, which is exactly the signal Amazon intends to send.

How do I avoid the long-term storage surcharge?

Sell through or get out before the snapshot. In rough order of return: discount or run deals to clear stock approaching 181 days, create a removal or liquidation order (liquidation typically recovers 5–10% of price, but stops the bleeding), or dispose as a last resort. Compare the surcharge this calculator shows against your liquidation recovery: for many aged SKUs, liquidating today beats storing another quarter.

Are the surcharge rates fixed?

No. Amazon has revised the tier boundaries and per-cubic-foot rates several times, and the schedule differs by size tier and marketplace. The $6.90 and $0.15 defaults here are the classic US 365+ day rates; set the rate field to the tier your inventory actually occupies, and confirm the current table in Seller Central before making a liquidation decision.

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Part of the Marketplace & Payment Fees collection.