Cut FBA Long Term Storage Fees for SMBs by Fixing Freight Timing

Amazon charges an aged inventory surcharge on top of your regular monthly storage fee once units sit in a fulfillment center too long. The two charges appear separately on your statement. If you sell on Amazon, open your Seller Central aged inventory view today and flag bulky, slow-moving SKUs for removal or a promotion before the next assessment. The sections below walk through the fee tiers, the deadlines, and a worked example so you can run the same math on your own catalog.

TL;DR:

• Regular monthly storage costs continue to accrue for units sitting in fulfillment centers, regardless of whether they trigger the aged inventory surcharge.
• Aged inventory surcharges are assessed monthly based on inventory age and size tier, with the highest rates applied after 181 days of storage.
• Early identification using inventory reports allows sellers to prioritize removals, discounts, or liquidation for slow-moving, bulky units before the surcharge deadline.
• Shipping timing and inventory staging significantly influence surcharge risk, with smaller, more frequent shipments reducing long-term exposure.
• ForwarderOne’s integrated freight management can help align shipments with sell-through rates, lowering the likelihood of inventory aging into surcharge zones.

What counts as a long-term storage fee versus regular monthly storage

Amazon bills FBA storage in two separate layers. The first is ordinary monthly storage, calculated from your daily average cubic-foot volume for that month. The second is the aged inventory surcharge, which kicks in based on how long a unit has sat in a fulfillment center, regardless of how much space it takes up that particular month.

According to Amazon’s monthly storage and fees guidance, these are distinct billing components with different bases: one measures space used, the other measures time held. Amazon has framed these charges around capacity efficiency, treating fulfillment center space as limited and reserving it for inventory with demonstrated sell-through, according to its own announcement on FBA fee changes.

That distinction matters for your planning. Clearing a unit out of surcharge range does not make your monthly storage bill disappear. You are still paying for the cubic feet that unit occupies every day it sits on a shelf, so avoiding the surcharge is only half the cost equation.

Fee tiers, assessment timing, and removal deadlines

Aged inventory surcharges are billed per cubic foot or subject to a per-unit minimum, whichever calculation applies to a given size tier, according to Amazon’s aged inventory surcharge documentation. The exact dollar figures and age bands change periodically, so treat any published table, including the one below, as a snapshot to verify against your live Seller Central account rather than a fixed reference.

Amazon runs its aged inventory assessment monthly, with charges typically posting around the 15th of the month. Removal or disposal orders need to lead time to process, so sellers who wait until the assessment date to act usually miss the window and get charged anyway. Build your review into your calendar a few days ahead of the 15th, not on it.

How to find at-risk inventory before it costs you

Finding exposure early is a matter of reading the right reports, not guessing from memory. Seller Central’s inventory tools break this down by age and by cubic-foot exposure, and both numbers matter for prioritization.

• Pull the inventory-age report and the aged inventory surcharge report to see which SKUs are approaching or already inside a surcharge band, per Amazon’s aged inventory guidance.
• Cross-check unit age against cubic-foot exposure using the FBA Inventory tool, since Amazon calculates exposure from fulfillment center unit dimensions, not your supplier’s carton measurements.
• Rank flagged SKUs by cube size and velocity first: a large, slow-moving item accumulates surcharge risk faster than a small one even at the same unit count.
• Give extra weight to seasonal inventory that missed its selling window and to anything whose resale value barely covers its removal cost, since these are the units least worth holding.

Inventory age does not reset just because a newer shipment of the same ASIN arrives at the fulfillment center. Amazon tracks age at the unit level, so a fresh restock sitting next to old stock does nothing to reduce the older units’ surcharge exposure.

What to do before your next storage fee assessment

Once you have identified at-risk SKUs, the clock matters more than the strategy you pick. Here is the order most sellers should work through:

1. Submit removal or disposal orders for units you have already written off mentally, since these typically take several days to process and should go in first.
2. Launch Outlet deals or targeted discounts on units still worth selling, using aggressive but profitable repricing to move volume before the assessment date.
3. Evaluate liquidation or donation for stock whose sale price would not cover the removal fee plus outbound shipping, since paying to remove a nearly worthless item rarely makes sense.
4. Consider multi-channel transfers, moving inventory to your own warehouse or another sales channel when the item still has resale value but not enough velocity on Amazon.

Removal cost, disposal cost, and continued monthly storage all belong in the same comparison.

Pro Tip: Run the removal-versus-hold math per unit, not per SKU total. A single high-cube item can flip the decision even when the rest of the batch is worth keeping.

Preventing inventory from aging into a surcharge in the first place

Fixing aged inventory after the fact is expensive. Preventing it is mostly a supply chain and packaging discipline problem, and it starts before the units ever reach a fulfillment center.

• Send smaller, more frequent shipments timed to actual sell-through instead of one large shipment meant to last a quarter, and line up arrivals with the monthly assessment calendar rather than against it.
• Stage reserve inventory outside FBA when the storage cost off-Amazon is cheaper than the aged-inventory risk, and factor that staging cost into your margin model rather than treating it as free insurance, following Seller Central’s staging guidance.
• Optimize packaging and carton dimensions, since Amazon’s monthly storage guidance confirms that lower billed cubic feet reduce cost even when unit count stays the same.
• Improve sell-through velocity with better product page conversion, since stronger listings reduce the odds that inventory sits long enough to age into a surcharge band.

Freight timing plays a bigger role in this than most sellers assume. When customs clearance, labeling, and fulfillment center receiving are not coordinated, replacement shipments arrive late, which pushes sellers to overstock earlier shipments as a buffer, the exact behavior that creates aged inventory. Reviewing how FBA warehouses receive and route inbound freight helps clarify where those delays typically originate.

Pro Tip: Treat your inbound freight schedule as part of your storage-fee strategy, not a separate logistics decision made in isolation.

Calculating your surcharge exposure for one ASIN

Here is a worked example using illustrative numbers, not live rates, since actual tiers should always be checked on Seller Central before you act.

Say a SKU has fulfillment center unit dimensions of 1.5 cubic feet, and you have 200 units that have aged past 181 days.

Run this same sequence for every flagged ASIN: pull the fulfillment center dimensions (not your supplier’s), multiply by quantity, apply the live tier from Seller Central, then weigh the result against removal cost and recoverable resale value.

Why logistics timing is the highest-leverage lever most sellers overlook

Most sellers treat aged inventory as a Seller Central problem to fix with removals and discounts. It is really a freight-planning problem that shows up months later on a storage bill. Overstocking to buffer against slow or unpredictable inbound shipments is the single biggest driver of surcharge exposure we see.

The trade-off is real: smaller, more frequent shipments protect you from surcharges but demand tighter cash flow discipline. Running a weekly exception report and syncing inbound freight schedules to the monthly assessment date closes that gap without forcing you to overbuy.

How ForwarderOne helps you keep inventory moving, not aging

Coordinated freight timing is the fix most sellers skip, and it is exactly where ForwarderOne fits. Instead of guessing when a shipment will clear customs, ForwarderOne’s DDP service manages duties, customs, and delivery in one workflow, so replenishment lands on schedule instead of forcing you to overstock as insurance.

• DDP shipping from China to a fulfillment center, with customs and delivery handled together in a streamlined process.
• Scheduled, smaller-batch shipments that align with typical sell-through rates instead of a single bulk order.
• FBA prep and labeling that help fulfillment center acceptance, reducing the delay window where inventory sits idle.
• Cargo insurance and route planning that help manage delays that can push sellers toward overbuying.

If tighter inbound timing would help you avoid the next aged-inventory review, see how ForwarderOne’s FBA freight forwarding works for sellers shipping from China.

Sources

Bookmark Amazon’s monthly storage guidance and the aged inventory surcharge page directly. Rates and thresholds change, so verify against these live pages before making a removal or disposal decision.

• Amazon Seller Central - Monthly Storage and Fees guidance
• Amazon Seller Central - Aged inventory surcharge and reports

FAQ

How do you avoid Amazon storage fees?

You cannot avoid regular monthly storage fees entirely since they apply to any unit sitting in a fulfillment center, but you can avoid the aged inventory surcharge by moving units out through sales, promotions, or removal before they cross into a surcharge age band, based on Amazon’s aged inventory guidance. Running inventory-age reports weekly and scheduling removals ahead of the monthly assessment is the most reliable approach.

What is a reasonable storage fee?

There is no single “reasonable” figure since fees depend on your product’s size tier, the season, and how long units have aged, and rates change periodically. Check the current rate for your specific size tier on Amazon’s monthly storage fee page rather than relying on a fixed number.

Why is my FBA fee so high?

A high FBA storage bill usually comes from a combination of large cubic-foot volume and units that have aged into a surcharge band, since the aged surcharge stacks on top of regular monthly storage. Check whether your bulkiest, slowest-moving SKUs have crossed an age threshold using the aged inventory surcharge report before assuming the fee structure itself changed.

Will Amazon FBA fees change in 2026?

Amazon periodically updates its fee structure and has explained these changes as an effort to improve capacity efficiency, according to its official announcement on FBA fee updates. Always confirm current rates on Seller Central rather than relying on a past year’s published table.