Amazon FBA Aged Inventory Surcharge: The Complete 2026 Guide to the Fee That Compounds Every Month

Amazon's aged inventory surcharge is not a variant of the monthly FBA storage fee. It is a separate charge that stacks on top of it, escalates through multiple rate bands, and bills every month a slow-moving unit stays in the fulfillment center past the trigger point. Most guides treat it as a footnote inside a general storage-fee overview and still cite the 271-day threshold Amazon retired in 2024. The current trigger is 181 days - 90 days earlier - and the fee structure added new tiers in January 2026 that make the math more punishing than it was even a year ago. Understanding how the charge is calculated, when it posts, what a seller can do before the 15th of each month, and how to prevent the problem at the replenishment stage is the core of managing FBA inventory profitably in 2026.

What the Aged Inventory Surcharge Is and What It Replaced

Before 2024, Amazon operated a long-term storage fee that kicked in at 271 days - roughly nine months of storage. The aged inventory surcharge replaced that structure and moved the trigger forward to 181 days, which is six months. A unit that crosses that line starts incurring a surcharge that applies every month it remains unsold.

Two things separate the aged inventory surcharge from the standard monthly FBA storage fee. First, the standard fee runs from day one of storage and reflects warehouse space used across all inventory, regardless of age. The aged inventory surcharge is a penalty-rate layer on top of that fee, applied only once a unit has been sitting long enough to signal a demand problem. A unit past 181 days pays both charges every month. Second, the surcharge is not a flat amount for the entire post-181-day window. It steps up through multiple rate bands as a unit ages further, with the highest bands added or modified in January 2026.

If you have read an article about FBA storage fees that mentions 271 days as the aged inventory threshold, that content is describing a policy Amazon no longer uses. The shift to 181 days changed the economics for any seller whose inventory turns slower than once every six months, and much of the advice published before 2024 is now materially wrong on the timeline.

The Full 2026 Rate Structure: Day 181 to 456 and Beyond

The rate structure is not a single charge applied uniformly past day 181. Within the first segment alone - the 181-to-270-day window - there are three sub-tiers that escalate across roughly 30-day bands. The surcharge begins at its lowest rate at day 181, steps up in the next band, and reaches a higher rate by the 241-to-270-day mark. That internal step-up is rarely shown in seller guides, which tend to describe the 181-270 range as a uniform block with one rate.

Past 270 days, the rate continues climbing through three additional sub-tiers spanning 271 to 365 days - a 271-to-300-day band, a 301-to-330-day band, and a 331-to-365-day band - each stepping higher at roughly 30-day intervals, following the same cadence as the 181-270 range. The jump in rate between the 241-270 tier and the 271-300 tier is particularly steep. After day 365, the rate moves into a 366-455 day band, and then into a new 456-plus-day tier that Amazon added on January 16, 2026. The January 2026 update also significantly raised the per-unit minimum floor in the 366-455 day band; this increase is widely described as a doubling in seller-facing fee announcements, but verify the exact historical and current per-unit figures in Seller Central to confirm. Because the surcharge uses a "whichever is greater" formula - cubic-foot rate or per-unit minimum - an increase to that floor means more SKUs now hit the per-unit charge rather than the cubic-foot calculation. Verify all current rates in Seller Central; Amazon revises the schedule and the figures shown here describe the tier structure and relative escalation, not static amounts.

Storage Age Band	Categories Affected	Rate Level	January 2026 Change
181-210 days	Most categories (see exemptions)	Entry - lowest surcharge tier	None
211-240 days	Most categories	Mid-band step-up	None
241-270 days	Most categories	High - third sub-tier within first window	None
271-300 days	All categories including previously exempt clothing, shoes, bags, jewelry, and watches	Sharp step-up - surcharge begins for previously exempt categories; rate jumps steeply from 241-270 band	None
301-330 days	All categories	Higher - second sub-tier within the 271-365 range	None
331-365 days	All categories	Higher still - third sub-tier and highest rate within the 271-365 range	None
366-455 days	All categories	Significantly higher; per-unit floor raised (widely described as doubled - verify current figures in Seller Central)	Per-unit minimum significantly raised effective Jan 16, 2026
456+ days	All categories	Highest - new tier	Entire tier added Jan 16, 2026

Because the surcharge stacks on top of the regular monthly storage fee, a unit that crosses from day 270 to day 271 does not escape prior charges; it simply moves to a higher rate for the next snapshot. A unit that spends multiple months past day 181 has paid surcharges at progressively higher rates across successive bands - not just the single rate applicable to the current band. The charge compounds.

How Amazon Decides Which Units Are Aged: The FIFO Rule

Amazon's fulfillment network applies FIFO accounting - first in, first out - across all fulfillment centers. When a customer orders your product, the system credits the oldest unit of that ASIN as the one sold, regardless of which physical fulfillment center ships the order.

The consequence that catches sellers off guard: sending a fresh inbound shipment does not protect units already in the warehouse from aging. New units enter behind existing ones in the FIFO queue. If you have 200 units that have been in the FC for 160 days and you send 100 more, you now have 200 units at 160-and-counting days plus 100 units aging from their own check-in date. Sales reduce the oldest units first. Neither group's clock is reset by the other's presence, and the fresh stock will itself age toward the 181-day threshold if sales velocity does not absorb it in time.

FIFO also shapes how to read velocity data. The sales rank for an ASIN reflects recent demand, but what the surcharge cares about is whether the oldest units of that ASIN are selling fast enough to clear before they cross each tier. A product with steady but slow sales may look fine on rank while aging units accumulate in the background. The Seller Central inventory age view surfaces this: filtering FBA Inventory by storage days and using the 60-day projection view shows which ASINs are drifting toward the next tier boundary before the charge becomes unavoidable.

The 14th-of-the-Month Deadline: How to Skip a Charge Entirely

Amazon takes a monthly inventory snapshot on the 15th of each month to determine which units have crossed a surcharge tier. Charges post to the seller account between the 18th and 22nd of that same month.

The mechanic that almost no guide explains: submitting a removal or disposal order before 11:59 PM Pacific time on the 14th removes the unit from that snapshot's surcharge calculation - even if the unit has not physically left the fulfillment center yet. Amazon records the submission date, not the departure date. A unit still sitting on a warehouse shelf on the 15th will not incur a surcharge for that month if a valid removal order was submitted before the deadline the night before.

This creates a hard, actionable window each month. Here is how to use it:

1. In the week before the 14th, open Seller Central and navigate to Inventory - FBA Inventory. Filter by storage days to identify units at or approaching 181 days, and check the 60-day projection view for ASINs that will cross a tier boundary at the next snapshot.
2. For each unit you want to protect from the upcoming charge, assess whether removal, disposal, or continued storage makes better economic sense given the projected surcharge, removal fee, and any secondary market value.
3. For units you want to remove, create a removal or disposal order in Seller Central with enough lead time to submit before 11:59 PM Pacific on the 14th.
4. Confirm the order appears with a "Submitted" or "In progress" status in Manage Orders. A submitted status is sufficient; you do not need to wait for physical fulfillment confirmation to secure the deadline protection.

Missing the 14th means that month's charge posts and cannot be reversed through the removal process. The unit costs less starting the following month if it is removed before the next snapshot, but the current month's charge is final.

Category Exemptions: Apparel, Footwear, Bags, Jewelry, and Watches

Not all inventory faces a surcharge at 181 days. The following categories are exempt from the 181-270 day surcharge tiers entirely:

• Clothing
• Shoes
• Bags
• Jewelry
• Watches

For sellers in those categories, the aged inventory surcharge does not begin until day 271. From that point, the same tier structure that applies to other categories at 271 days applies here. The exemption does not extend to the standard monthly FBA storage fee, which applies from day one across all categories - only the aged inventory surcharge is deferred.

The practical basis for the exemption reflects the seasonal nature of fashion inventory. A winter coat at day 200 in July is not necessarily a slow mover; it may be waiting for its demand season. Amazon's category-specific carve-out acknowledges that. For sellers in these categories, the first surcharge threshold to monitor is day 271, not 181. Set Seller Central alerts and inventory age filters around the 211-day mark to catch anything drifting toward the 271-day trigger with enough time to act. Sellers who sell across both exempt and non-exempt categories need to track aging thresholds separately by category - a single view filtered by all storage days will not distinguish between a 200-day apparel unit (no surcharge yet) and a 200-day small-appliance unit (surcharge already posting).

Per-Cubic-Foot vs Per-Unit: Which Formula Governs Your SKU

At the 366-455 day band and the new 456-plus tier, the surcharge uses a "whichever is greater" formula: the charge is either the per-cubic-foot rate multiplied by the unit's cubic footage, or the per-unit minimum - whichever produces the higher number. Which formula controls your exposure depends on the physical dimensions of your product.

The math divides products into two practical categories:

• Large-light products - items with a significant footprint relative to their weight, such as oversized foam items, bulky storage containers, or large toys. These occupy meaningful cubic footage, so the cubic-foot formula typically produces a charge above the per-unit minimum. Surcharge exposure for these SKUs scales directly with how much space they consume. The relevant number to watch is cubic footage per unit.
• Small-dense products - items with a compact physical footprint, such as small electronics components, supplements, or jewelry. These occupy very little cubic footage, so the cubic-foot formula produces a low result. For these SKUs, the per-unit minimum floor becomes the controlling figure - and that floor was significantly raised for the 366-455 day tier in January 2026. A small-dense seller who calculated their aged-inventory exposure before January 2026 and has not recalculated is working with the wrong number.

To determine the crossover point for any specific SKU: divide the per-unit minimum by the current per-cubic-foot rate (check Seller Central for current figures). The result is the cubic footage at which both formulas produce the same charge. Units with cubic footage below that threshold will hit the per-unit floor. Units above it will be charged by cubic footage. This single calculation tells you whether to monitor your aged-inventory exposure in cubic feet or in unit count - and those two metrics point toward different operational responses.

The January 2026 per-unit floor increase shifted many small-dense SKUs from the cubic-foot formula into the per-unit minimum range. If you sell compact products and the 366-day band is within reach of any slow movers, recalculate now using the current floor rather than the pre-2026 figure.

The IPI Penalty: Why Aged Stock Punishes the Account Twice

The direct surcharge is only the first cost of aged inventory. The second is structural and affects the entire account. Aged units inflate a seller's excess inventory percentage, which is one of the inputs Amazon uses to calculate the Inventory Performance Index - the composite score that governs restock limits and, indirectly, listing visibility.

When units sit past their optimal inventory level - and aged units are definitionally past it - the excess inventory percentage rises. A sustained increase in that metric pulls IPI downward. IPI scores below the threshold Amazon currently enforces (check Seller Central for the active cutoff, as it has changed over time) trigger consequences that go beyond the surcharge itself:

• Restock limits on the affected account, restricting how many units can be sent to FBA for specific ASINs or in aggregate. This limits a seller's ability to stock up on fast movers, compressing the revenue side of the business precisely when cash is already being drained by surcharges.
• Reduced visibility in Amazon search and browse results, as the platform's algorithms deprioritize listings from accounts carrying poor inventory health signals - adding a demand-side cost on top of the direct fee.

The compounding dynamic is the part most guides omit. Restock limits make it harder to build velocity on fast-moving products because there is less room in the FC for them. Meanwhile the aged units that caused the IPI drop continue aging, continue raising the excess inventory percentage, and continue suppressing the score. The fee and the IPI penalty feed each other.

The correct response is not to send more overall inventory, which does not change the FIFO-governed aging of existing stock. The targeted fix is reducing aged units specifically - through sales velocity, price reductions, or removal - before the excess inventory percentage climbs high enough to trigger account-level storage restrictions on top of the surcharge line items.

Three Exit Paths and Their Math: Price Reduction, Removal Order, Amazon Liquidation

Every month a slow-moving unit stays in an Amazon fulfillment center past day 181, the cost of holding it rises and the cost of acting on it looks better by comparison. The surcharge does not plateau - it compounds through successive tier increases until the unit is gone.

Every unit past 181 days has three practical exits. None is free, but their costs and recoveries differ substantially, and the choice between them depends on the unit's secondary market value, physical size, and how far it has already aged.

Path 1: Price reduction and Amazon Outlet

Selling the unit is the highest-recovery exit. It keeps retail proceeds, eliminates the ongoing surcharge, stops the monthly storage fee, and removes the unit from the excess inventory percentage calculation that drags IPI. Amazon Outlet - the platform's built-in clearance channel - requires discounting the current sale price by a minimum percentage threshold (check Seller Central for the current qualifying discount requirement). Qualifying listings are surfaced to deal-seeking shoppers through Outlet browse pages and promotional placements, adding demand the regular listing page does not generate. The cost is margin compression; the benefit is that cash is recovered and the problem unit disappears. Price reductions that fall short of the qualifying discount threshold do not receive Outlet placement and rely solely on organic traffic at the lower price.

Path 2: Removal order

A removal order returns units to a seller-specified address - typically a home address, a prep center, or a third-party logistics facility. The seller pays a per-unit removal fee that varies by size and weight tier. Fees for the lightest standard-size items dropped in January 2026, making early removal of lightweight slow movers cheaper than absorbing another month of compounding surcharge. Check Seller Central for current removal fee rates by size tier. The economic test is direct: if the surcharge the unit will accumulate over its projected remaining time in the FC exceeds the removal fee plus any cost to handle and resell the inventory outside Amazon, removal wins. Units with a viable secondary market - other online channels, wholesale, retail arbitrage, or bundling opportunities - are strong removal candidates.

Path 3: Amazon's liquidation program

Amazon's liquidation program sells unsold inventory through a dedicated liquidation channel and charges the seller a percentage of gross recovery value as a referral fee, plus a size-and-weight processing fee per unit. Net recovery is low - a small fraction of retail value - making this the last-resort option after price reductions and removal have both been assessed and found impractical. Liquidation makes sense when units have no meaningful secondary market, the removal fee plus off-Amazon handling cost would exceed what liquidation yields, and continued storage is costing more per month than liquidation proceeds justify. Initiating it is low-effort from Seller Central; the economics simply mean it is not a first response to slow sales.

Prevention: Replenishment Sizing and Using a Prep Center as an Inventory Buffer

The aged inventory surcharge is a logistics problem before it is a financial one. Units age past 181 days because more stock entered the FC than sales velocity could absorb within the window. Fixing that imbalance requires adjusting how much inventory goes to Amazon at once and where the rest waits in the meantime.

Sizing FBA replenishment correctly

A straightforward reorder-point calculation accounts for three variables: average daily sales rate for the ASIN, total lead time in days from reorder to FBA check-in (including supplier lead time, prep, and transit), and a safety stock buffer for variability. Multiply average daily sales by total lead time to get the minimum reorder point. Send enough units to cover that window plus safety stock - not a full manufacturer minimum order quantity. Units that exceed roughly 90 days of forward coverage at current velocity are candidates to sit past 181 days; avoid sending them to FBA until velocity supports it, and hold them elsewhere in the meantime.

Velocity assumptions need to be realistic. A product with seasonal demand should be sized for the expected seasonal velocity, not an annual average that smooths the peak-and-trough pattern. Overestimating velocity at reorder time is one of the most common sources of aged inventory.

Using a prep center as an inventory buffer

One of the most direct tools for aged-inventory prevention is holding a portion of purchased inventory at a prep center or third-party logistics facility rather than shipping everything to Amazon at once. Units stored at a 3PL are not being counted by Amazon's monthly snapshot, are not aging toward a surcharge threshold, and incur only the 3PL's monthly storage rate - typically far lower than FBA's escalating surcharge stack. The buffer approach works like this: when a large purchase arrives, send only the quantity FBA can absorb within 90 days at current velocity. Hold the remainder at the prep center. As FBA inventory drops toward reorder point, release the next batch for prep and inbound shipment. The units arriving at the FC are fresh; the buffer units age on the 3PL clock, which carries no surcharge consequence.

There is one variable in this strategy that is often treated as logistics-only but is actually financial: prep center turnaround time. Every day a unit spends at a supplier, in transit, or sitting in a prep center queue counts against the 181-day aging clock before the unit receives a single Amazon check-in scan. A unit that waits three weeks at a slow prep facility and two more weeks in inbound transit enters the FC already 35 days into its aging window. That is 35 days the unit cannot sell on Amazon - reducing the window from 181 days to 146. For products with modest velocity, the difference between a prep center that turns orders in two to three days versus two to three weeks can be the difference between comfortable margins and a surcharge problem before the unit ever reaches a customer.

Choosing a prep partner with reliable, fast turnaround is not just an operational preference. It is a direct variable in aged-inventory risk and, by extension, a financial input that belongs in the same calculation as storage rates, shipping costs, and FBA fees.

Frequently Asked Questions

Does the aged inventory surcharge replace the regular FBA storage fee?

No - the surcharge is charged on top of the standard monthly FBA storage fee, not instead of it. A unit past 181 days pays both the base storage fee and the aged inventory surcharge every month until it sells, is removed, or is liquidated. The two charges are calculated and billed separately.

If I send a new inbound shipment of the same ASIN, does it reset the aging clock on units already in the FC?

No. Amazon uses FIFO accounting across its entire fulfillment network: when a sale occurs, the oldest unit of that ASIN is credited as sold. New units queue behind existing ones. Existing units continue aging at their own pace regardless of what arrives alongside them. The only way to stop the clock on an aging unit is to sell it, submit a removal order, or initiate a disposal or liquidation.

Can I avoid a surcharge if I submit a removal order but the unit is still physically in the FC on the 15th?

Yes, provided the removal order was submitted before 11:59 PM Pacific time on the 14th. Amazon uses the submission date - not the departure date - to determine surcharge eligibility at the monthly snapshot. A unit still on the warehouse shelf on the 15th will not incur that month's charge if a valid removal order was submitted before the deadline. Confirm the order shows a submitted status in Seller Central before that cutoff.

Which product categories are exempt from the 181-day surcharge tier?

Clothing, shoes, bags, jewelry, and watches are exempt from the 181-270 day surcharge tiers. Those categories begin incurring the aged inventory surcharge at day 271, at the same rate structure that applies to other categories from day 271 onward. The standard monthly FBA storage fee applies to all categories from day one regardless of this exemption.

My IPI score dropped - will sending more inventory to Amazon improve it?

It depends on why the score dropped. If the drop is driven by excess inventory percentage from aging units, sending more inventory does not address the root cause and may worsen the excess percentage if the new units do not sell quickly. The targeted fix is reducing aged units specifically - through sales velocity, price reductions, or removal orders - before the excess percentage climbs high enough to trigger account-level restock restrictions. Adding fast-moving inventory can help the sell-through component of IPI, but it will not offset a rising excess inventory percentage caused by slow movers.

When is Amazon Outlet the right choice versus a simple price reduction?

Amazon Outlet surfaces your listing to a dedicated channel of deal-seeking shoppers, which a price reduction alone does not do. The qualification requires discounting by a minimum threshold from your current sale price - check Seller Central for the current requirement. If you are willing to discount to that threshold or beyond, Outlet typically produces better demand than a quiet price change, because the listing appears in a separate browse experience that your regular listing page does not reach. For slow movers that need active promotion rather than passive availability at a lower price, qualifying for Outlet is the better choice.