Skip to calculator
Veomark

Free · Instant · No signup

Amazon FBA Storage Fee Estimator

Monthly and aged storage from cubic feet, rate per cu ft, and long-term surcharge.

Page updated 2026-09-14.

Amazon FBA Storage Fee Estimator visual
Sponsored
QuotVid free YouTube Shorts automation trial - get Shorts posted for you daily

Calculator

L x W x H in inches / 1728. Default 18.

Standard-size off-peak example. Default $0.87.

Default 2.

Default $6.90.

Calculated Results

This month storage

--

Base storage

--

Long-term surcharge

--

Sponsored
QuotVid AI quote video studio - turn words into viral videos

Base storage plus a long-term aged surcharge

18 cubic feet of stored inventory at $0.87/cu ft monthly storage comes to $15.66 in base storage fees. Of that stored inventory, 2 cubic feet has aged past 271 days and carries a separate $6.90/cu ft surcharge, adding $13.80. Total storage cost for the month: $29.46.

The aged-inventory surcharge is disproportionate to its share of total volume here: just 2 of the 18 cubic feet (11% of stored volume) is responsible for nearly half ($13.80 of $29.46) of the total storage bill -- long-term storage fees are steep specifically to push sellers to move slow inventory.

Base storage rates also change seasonally on real Amazon Seller Central -- Q4 (October-December) rates typically run several times higher than the rest of the year, which this calculator's flat rate field doesn't automatically apply unless you update it to match the season.

Why this figure needs regular updating

Uses the rates you type. Peak months and size tiers change on Seller Central. Amazon updates storage rates periodically and applies different rates for standard-size versus oversize items -- this calculator uses whatever rate you enter, so it's only as current as the last time you checked Seller Central's fee schedule.

Long-term storage surcharges kick in specifically at the 271-day and 365-day marks (with 365+ carrying an even steeper rate in Amazon's real fee schedule) -- this simplified model uses one aged-surcharge rate rather than the full tiered structure.

For inventory approaching the aged threshold, the real decision is often whether continuing to pay this surcharge is cheaper than a removal order or a liquidation sale -- run both options through this calculator with adjusted cubic footage to compare.

Related FBA cost questions

Storage is only one piece of total FBA cost -- see the Amazon FBA Calculator for fulfillment and referral fees on top of storage.

If inventory carrying cost is the broader question beyond just Amazon's specific fee schedule, the Inventory Holding Cost Calculator covers storage, capital, and shrink together.

Frequently Asked Questions (FAQ)

How is the $29.46 total storage cost calculated?

Base storage (18 cu ft x $0.87 = $15.66) plus the aged-inventory surcharge (2 cu ft x $6.90 = $13.80) = $29.46 total.

What counts as 'aged' inventory for the surcharge?

In Amazon's real fee schedule, inventory stored 271 days or longer triggers a long-term storage surcharge, with an even steeper rate after 365 days. This calculator uses a single aged-surcharge rate rather than modeling both tiers separately.

Do storage rates change during the year?

Uses the rates you type. Peak months and size tiers change on Seller Central. Yes -- Amazon typically charges higher storage rates during Q4 (October through December) than the rest of the year. Update the rate field to match the current season's published rate for an accurate estimate.

Does this account for oversize vs. standard-size items?

Not automatically. Amazon's real storage rates differ by size tier. Enter the rate that matches your specific product's size classification from Seller Central rather than assuming one flat rate applies to everything.

What should I do with inventory that's about to hit the aged surcharge?

Compare the ongoing surcharge cost against a removal order or liquidation. Run this calculator with the cubic footage you'd remove to see the monthly surcharge you'd avoid, and weigh that against removal fees.

You might also need