When Does Amazon Charge FBA Storage Fees

Published: May 18, 2026 | Last updated: May 18, 2026

Amazon charges FBA storage fees on a monthly cycle for inventory stored in its fulfillment centers, and Amazon also applies separate aged-inventory or long-term storage fees on Amazon’s scheduled assessment months for units that pass the relevant age thresholds. If you are asking when does Amazon charge FBA storage fees, the short answer is this: monthly storage is measured during the month and posted to your seller account in the next billing cycle, while long-term storage fees Amazon uses are assessed on scheduled dates and then posted as separate charges in Seller Central. This guide explains the timing, the Amazon FBA storage fees billing cycle, where to find charges, and what to do before fees stack up.

What You Will Learn

• Exactly when monthly FBA storage fees charged amounts are measured and posted
• How Amazon assesses long-term storage fees and the usual FBA storage fee schedule
• Where to find storage-related charges inside Seller Central and how to reconcile them
• Worked examples that show how storage fees are calculated Amazon FBA
• Decision rules for removals, liquidation, and promotions before fees rise
• Regional and special-case differences for Small and Light, oversized, and hazmat inventory

How Amazon charges monthly FBA storage fees

What is monthly FBA storage?

Monthly FBA storage fees are charges Amazon applies for the space your inventory occupies inside FBA fulfillment centers. Amazon generally calculates those fees based on the average daily volume or monthly storage measurement for your units, using cubic feet for most inventory categories and different billing logic for certain special programs (Amazon Seller Central, 2026).

Inventory snapshot date and billing cycle

If you want a practical answer to when are FBA storage fees charged, think in two stages. First, Amazon measures the storage footprint of your inventory during the month. Second, Amazon posts the related charge to your account in the next settlement or invoice cycle. In our experience managing Amazon stores, many sellers know storage is “monthly” but cannot match a posted fee to the inventory they held at month end. That gap causes missed disputes and bad replenishment decisions.

Amazon’s exact internal timing can vary slightly by marketplace and report availability, but the safest working assumption is that Amazon uses marketplace-specific end-of-month inventory data tied to the local reporting calendar. The charge then appears in the seller account after the month closes. Sellers in the US commonly reconcile those charges against the prior month’s storage footprint and the payment period that follows.

1. Pull your month-end inventory and cube data by SKU.
2. Match each SKU to the correct size tier and marketplace rate.
3. Estimate the storage fee before Amazon posts the charge.
4. Compare your estimate with the Payments transaction detail once the fee appears.

What is charged, cubic feet vs. per-unit

For most FBA inventory, Amazon charges based on cubic feet occupied. Standard-size and oversize products both fall under space-based billing, but each size tier has its own rate. Some legacy or special programs may use per-unit billing logic. Sellers often confuse fulfillment fees and storage fees here. Fulfillment fees are usually per unit shipped. Storage fees are based on how much physical space your inventory takes up while waiting to sell.

Timezone, billing periods, and rounding

The FBA inventory storage fees timing depends on marketplace time zone and reporting cadence. A US seller account should be reconciled against US marketplace reports. EU and Canada can follow different local date cutoffs and fee tables. Amazon also rounds dimensions and storage measurements according to its measurement rules, so your internal warehouse measurements may not match Seller Central exactly. We have seen this issue with clients that package in poly bags or switch carton suppliers. A half-inch increase in packaged dimensions can move a SKU’s cubic volume enough to raise the monthly fee.

For that reason, your forecast should never rely only on catalog dimensions from your supplier. Use Amazon’s stored dimensions where possible, then compare them with your own measurements if the fee looks off.

Monthly storage fee calculation, worked examples

How storage fees are calculated Amazon FBA

How storage fees are calculated Amazon FBA: Amazon multiplies the storage volume of your inventory by the applicable monthly storage rate for that size tier and season. The exact rate depends on marketplace, time of year, and whether the product is standard-size or oversize (Amazon Seller Central, 2026).

Since Amazon changes fee tables over time, the examples below use simple sample rates to show the math. Always confirm current rates in the official fee schedule before making decisions.

Sample SKU calculations

Example 1, small standard-size SKUA vitamin bottle measures 8 in x 4 in x 2 in packaged. Cubic inches = 64. Divide by 1,728 to get cubic feet, which is 0.0370 cubic feet per unit. If 400 units are stored, total volume is 14.8 cubic feet. Using a sample off-peak rate of $0.87 per cubic foot, the monthly storage fee is 14.8 x $0.87 = $12.88.

Example 2, large oversize SKUA pet stair unit measures 24 in x 18 in x 16 in packaged. Cubic inches = 6,912. Divide by 1,728, which equals 4.0 cubic feet per unit. If 25 units are stored, total volume is 100 cubic feet. Using a sample oversize rate of $0.56 per cubic foot, the monthly storage fee is 100 x $0.56 = $56.00.

Example 3, Small and Light style low-cube unitA compact phone cable pack occupies 0.01 cubic feet per unit. If 2,000 units are stored, total volume is 20 cubic feet. If the effective storage rate in your marketplace works out to $0.87 per cubic foot for the month, the storage fee is 20 x $0.87 = $17.40. The key point is that low-value items can still become expensive if units sit too long.

Fees summary table

• Measure packaged unit dimensions, not product-only dimensions.
• Convert cubic inches to cubic feet by dividing by 1,728.
• Multiply cubic feet per unit by units on hand.
• Apply the correct monthly rate for the marketplace and season.
• Compare your estimate to the fee posted in Payments.

In our experience, the biggest forecasting errors come from stale dimensions and from assuming all standard-size items cost roughly the same to store. They do not. A few large but slow-moving SKUs can account for most of your monthly bill.

When Amazon charges long-term storage fees (LTSF)

What are long-term storage fees?

Long-term storage fees, now often grouped under aged inventory surcharges in some marketplaces and fee updates, are extra charges Amazon applies to units that remain in FBA past specific age thresholds. Sellers still search for when are long term storage fees charged because the practical question remains the same: when does aged inventory start costing more, and on what date does Amazon assess it?

LTSF age thresholds and billing months

Amazon has changed aged inventory programs several times over the years, so sellers should treat any static month list as a working guide, not a permanent rule. Historically, many sellers tracked long-term storage fees Amazon assessed in February and August, with inventory age thresholds such as 181+ days or 365+ days depending on the policy version in place. Current fee schedules can differ by marketplace, so always verify the latest guidance in Seller Central (Amazon Seller Central, 2026).

For planning purposes, the logic is straightforward. Amazon checks the age of each unit based on when Amazon received the unit into FBA. If the unit passes the relevant threshold by the assessment date, the fee can apply unless you remove, liquidate, or sell through the inventory first.

How LTSF is calculated and billed

Amazon may calculate aged inventory fees by cubic foot, by unit, or under a marketplace-specific aged inventory surcharge table. The policy version matters. That is why sellers should not assume the same method every year. Once Amazon runs the assessment, the charge appears in account activity as a separate fee line rather than being folded into ordinary monthly storage.

Here is a simple planning example. Suppose a cookware set occupies 1.2 cubic feet and you hold 120 units that are older than the threshold. If the aged inventory surcharge is materially higher than your normal monthly rate, waiting one more cycle can cost more than a removal order. We have seen clients save four figures in a single month simply by removing 80 to 100 stale oversize units two weeks before the assessment window.

Exceptions, waivers, and removals

Recent receipts, certain program exceptions, stranded inventory issues, or policy-specific exemptions can affect whether a fee applies. Amazon also allows sellers to create removal orders. The timing matters. A removal order submitted after the assessment date will not reliably prevent the fee for that cycle. Sellers who want to avoid the charge should act before Amazon’s stated cutoff.

1. Check the Inventory Age report at least twice during the month before the assessment window.
2. Flag SKUs nearing the threshold.
3. Decide whether to remove, liquidate, discount, or keep them.
4. Submit removal orders before Amazon’s published deadline.

Other storage-related charges and when they appear

Removal, disposal, and return processing fees

Storage fees are only one part of the total carrying cost. Amazon can also charge removal fees, disposal fees, return processing fees, and in some cases low-level service fees tied to problem inventory. Sellers often ask how Amazon charges storage fees, but the better question is how Amazon charges storage-related handling overall. The answer is that different fees post at different times.

Removal and disposal fees usually hit your account after Amazon processes the request, not at the moment you click submit. Return processing fees are tied to customer returns and show separately in transaction reports. If a SKU has a high return rate and low sell-through, you can end up paying storage while also paying return-related charges. That combination often kills margin.

Unplanned services and assessments

Unplanned prep or labeling service fees do not count as storage fees, but they can increase your all-in cost and delay inventory from becoming available for sale. A receiving problem can add days or weeks before a unit starts selling. During peak periods, that lag matters because inventory can roll into another monthly charge cycle before the sales velocity catches up.

We have seen this happen with bundles and products that arrive with inconsistent labeling. The seller focuses on prep fees and misses the hidden cost, which is the extra storage month created by the delay.

Seasonal increases and peak surcharges

Amazon commonly charges higher monthly storage rates during peak season, especially in Q4. That means the answer to when are FBA storage fees charged is not only about dates, it is also about seasonality. Holding the same 200 cubic feet in November costs more than holding the same 200 cubic feet in May under most fee schedules.

For a broader margin view, see our Complete breakdown of Amazon FBA fees.

Where to find these charges and reconcile invoices in Seller Central

Which reports and pages to check

Sellers lose time on reconciliation because Amazon spreads fee data across several screens. If you need to confirm when does Amazon charge FBA storage fees for your own account, use a repeatable process.

1. Go to Payments > Transaction View. Search for storage-related transactions and filter by date range.
2. Open Reports > Fulfillment. Review inventory reports and fee-related exports tied to FBA activity.
3. Check Inventory > Inventory Health. This page highlights excess and aged inventory.
4. Run the Inventory Age report. Export by SKU and sort by aging bracket.
5. Review any available Fee Preview or fee estimate tools inside inventory planning pages.

Amazon changes menu labels from time to time, so the names may vary slightly by marketplace. The report logic does not change much. Payments shows what posted. Inventory reports show why it likely posted.

Using Inventory Age and Fee Preview to forecast charges

The Inventory Age report is the most useful tool for forecasting. It tells you how many units fall into each age band. Once you pair that with cube data and the current fee table, you can estimate both monthly storage and long-term or aged inventory exposure. In our agency work, we build a simple file that updates weekly for clients with more than 200 active FBA SKUs. That one file usually identifies 80 percent of the coming fee risk.

If Amazon offers a fee preview in your marketplace, use it as a reference point, not your only source. Preview tools can lag. A manual spot check on your top 20 volume-heavy SKUs is still worth doing every month.

Reconciliation checklist and spreadsheet template

Use these spreadsheet columns for a copy-ready reconciliation template:

That process gives you an audit trail if a fee looks wrong. It also tells you which SKUs to act on first. For related cost controls, read our Ways to reduce FBA fees.

Practical strategies to reduce and avoid storage fees

Inventory planning and demand forecasting

The best way to reduce monthly FBA storage fees charged amounts is to send less dead stock into FBA. That sounds obvious, but execution is where sellers struggle. You need reorder points tied to real weekly sales velocity, not supplier minimums alone. If a SKU sells 90 units a month, sending 600 units because freight is cheaper per carton usually creates a storage problem.

Better planning tactics include shorter lead times, smaller but more frequent shipments, and tighter seasonal buys. Keep enough stock to avoid stockouts, but stop treating FBA as your overflow warehouse. In our experience, sellers with disciplined replenishment calendars often cut storage expense by 15 to 30 percent without losing sales.

Removal, liquidation, and promotions, when each makes sense

A seller should compare future storage cost against the one-time cost of removal, disposal, or liquidation. Here is a simple break-even view.

Example: an oversize SKU costs $7 per month in storage and has 90 units left. If sell-through is weak and the units may sit another 6 months, projected storage is $630. If removal costs $0.90 per unit, the one-time removal bill is $81. Even after outbound handling on your side, removal is usually the better move.

Program choices

Some SKUs benefit from alternative programs. If a low-price, low-cube item fits the rules, review whether it belongs in a special FBA program. If a product is bulky and slow, Merchant Fulfilled Network or third-party warehousing may be cheaper than FBA storage. Automated removal settings can also help if you regularly carry seasonal inventory.

If your catalog includes many low-price small items, see our guide on how to Enroll in the FBA Small & Light program.

• Review top 20 storage-cost SKUs every month.
• Cut reorder quantities on slow movers before the next PO.
• Mark items above 180 days for promotion review.
• Submit removals ahead of aged inventory assessment dates.
• Recheck dimensions on bulky products with unexpected fees.

Special cases: regional timing, oversized or hazmat items, and policy changes

US vs EU vs Canada billing differences

The Amazon FBA storage fees billing cycle is similar across marketplaces in principle, but rates, currencies, tax treatment, local time zones, and policy labels can differ. US sellers often reconcile against US month-end and USD fee schedules. EU marketplaces may layer VAT implications into your bookkeeping. Canada follows its own fee table and local reporting logic.

Official references: Amazon Seller Central — Inventory storage fees (monthly) and Amazon Seller Central — Long-term storage fees and schedule.

Oversize and special handling items

Oversize and hazmat products deserve extra attention because their dimensions, storage constraints, and handling requirements can create larger fees. Hazmat items may face placement or handling rules that slow sell-in and increase storage days. Oversize products can look profitable on contribution margin until you account for six months of storage plus return risk. We have seen furniture accessories and automotive parts become loss leaders for this reason.

How to stay updated on Amazon policy changes

Amazon changes fee policies often enough that any article on FBA storage fee schedule should be read with a date stamp. The safest process is simple. Check Seller Central announcements monthly. Review official fee pages before each quarter. Watch your Inventory Performance Index and aged inventory reports weekly if you carry broad catalogs. A seller who monitors only once a quarter usually acts too late.

FAQ — common seller questions about FBA storage billing

When are monthly FBA storage fees charged to my account?

Monthly FBA storage fees are generally measured during the month based on the space your inventory occupies in Amazon fulfillment centers, then posted to your seller account in the next billing cycle after the month closes. To verify the exact timing for your account, check Payments transaction detail and compare it with the prior month’s inventory reports.

When are long-term storage fees charged on Amazon, what months?

Amazon has historically used scheduled assessment months, often including February and August in older fee frameworks, for long-term or aged inventory charges. The exact months and fee structure can change by marketplace and policy year, so sellers should confirm the current schedule inside Seller Central before relying on any fixed calendar.

How does Amazon calculate FBA storage fees, per unit or cubic foot?

Amazon usually calculates standard FBA storage fees by cubic foot of inventory stored, with separate rates for standard-size and oversize items. Some special programs or policy updates may apply different logic, but most sellers should assume storage cost is driven by packaged dimensions multiplied by units on hand and then matched to the current monthly rate.

How can I find and reconcile storage fees in Seller Central?

You can reconcile storage fees in Seller Central by checking Payments for posted transactions, running the Inventory Age report for unit aging, reviewing Inventory Health for excess stock, and exporting fulfillment reports to match SKU-level dimensions and quantities against the fee posted. A spreadsheet with SKU, ASIN, units, cubic feet, rate, expected fee, and posted fee makes this process much faster.

Will inbound shipments or recent receipts prevent storage fees?

Recent inbound shipments do not automatically prevent monthly storage fees, because monthly fees apply to inventory stored in fulfillment centers during the billing period. Recent receipts can matter for aged inventory calculations in certain policy scenarios, but sellers should not assume that newly received units are exempt without checking the current Amazon rule for that marketplace.

How do removal and disposal fees compare to paying storage fees?

Removal and disposal fees are one-time charges, while storage fees continue every month and can increase under aged inventory rules. If a SKU is slow-moving and likely to sit for several more months, a removal order often costs less than continuing to pay storage, especially for bulky or oversize products.

Do storage fee schedules differ between the US, EU, and Canada?

Yes, storage fee schedules differ between the US, EU, and Canada because each marketplace can have different rate tables, currencies, local date cutoffs, and policy wording. Sellers should reconcile fees using the official schedule and reports for the specific marketplace where the inventory is stored.

Summary / Key takeaways

If you started with the question when does Amazon charge FBA storage fees, the practical answer is now clear. Amazon charges monthly storage after measuring the inventory you hold during the month, and Amazon charges long-term or aged inventory fees on separate scheduled assessment dates for units that exceed policy thresholds. The real work is not memorizing the definition. The real work is forecasting the next charge before Amazon posts it.

• Monthly storage fees are tied to the amount of FBA space your inventory occupies during the month.
• Aged inventory or long-term storage fees are separate from normal monthly storage and depend on inventory age thresholds.
• Payments shows the posted fee, while Inventory Age and Inventory Health usually explain why the fee happened.
• Bulky, slow-moving SKUs create the largest surprise charges because cubic feet matter more than unit count.
• Removal is often cheaper than storing stale inventory for several more months.
• Regional differences matter, so confirm the current fee table for each marketplace.
• Policy changes happen often, so use Seller Central as the final source before acting.

30, 60, 90-day action list

• Next 30 days: export Inventory Age, identify top 20 storage-cost SKUs, and estimate next month’s fee.
• Next 60 days: adjust reorder points, remeasure bulky SKUs, and launch promotions on aged units.
• Next 90 days: set removal rules, compare FBA vs FBM for slow movers, and review the newest Amazon fee notices.

If you want a faster way to model this, download our free FBA Storage Fee Calculator and inventory reconciliation template, or request a 30-minute inventory audit to identify SKUs likely to trigger monthly or aged-inventory charges.