Amazon FBA storage fees for US sellers are $0.78 per cubic foot per month for standard-size and $0.56 per cubic foot for oversize from January through September, rising to $2.40 and $1.40 respectively from October through December (Amazon Seller Central, Monthly inventory storage fees, data checked 2026-08-20). That base rate is only half the story: a separate storage utilization surcharge of up to $1.88 per cubic foot stacks on top for sellers whose inventory turns too slowly.
This guide reads the official rate card cell by cell, explains the volume measurement that decides what you are billed for, and separates the three FBA storage charges that get mixed up constantly.
Adjacent reading on this site: FBA size tiers for how a unit lands in standard-size versus oversize, and FBA fees and profit for where storage sits in full unit economics.
Fact Block: The 2026 Monthly Storage Fee Rate Card
Every figure in this section comes from Amazon’s public Seller Central help page Monthly inventory storage fees (article applies to selling in the United States), read on 2026-08-20. The page is readable without a seller account at its /help/hub/reference/external/ address.
Base monthly storage fee, non-dangerous goods (per cubic foot):
| Product size tier | January – September | October – December |
|---|---|---|
| Standard-size | $0.78 | $2.40 |
| Oversize | $0.56 | $1.40 |
Dangerous goods products (per cubic foot):
| Product size tier | January – September | October – December |
|---|---|---|
| Standard-size | $0.99 | $3.63 |
| Oversize | $0.78 | $2.43 |
Three things about this table that sellers routinely get wrong:
- The billing unit is the cubic foot, not the unit. Your fee is average daily units multiplied by packaged volume per unit multiplied by the applicable rate. Amazon states the formula on the same page: Fee per product = average daily units x volume per unit x applicable rate.
- Standard-size costs more than oversize. That is not a transcription error. Amazon’s own footnote explains it: standard-size products “may require more complex and costly shelving, drawers, and bins for storage.”
- Dangerous goods carry their own card. If your ASIN is enrolled in the FBA Dangerous Goods program, neither the $0.78 nor the $2.40 applies to it.
Fees are charged monthly, typically between the 7th and 15th of the month following the month in which storage was used. An August bill shows up in September.
How Amazon Measures the Volume You Are Billed For
Two measurement rules do most of the damage to a first-time reader’s estimate.
Volume is the fully packaged unit. Amazon measures longest side x median side x shortest side “when a product is fully packaged and ready to ship in accordance with FBA policies and requirements” (data checked 2026-08-20). Poly bag slack, an oversized master carton, or air in a retail box is billed space. This is also why the same product can be quoted two different storage costs by two different calculators — they are measuring different boxes.
Units are a daily average, not a month-end snapshot. The charge is based on “the average number of units stored in FBA per month, minus the average number of units pending removal.” A unit that arrives on the 2nd and sells on the 29th is present for essentially the whole month; a shipment that lands on the 28th contributes roughly a tenth of a month. It also means a single unit that spans a month boundary appears on two invoices, which is the usual explanation for the I only stored it a month and got billed twice complaint.
One reading trap worth naming: in the Values used to calculate fee section, the Product volume row says monthly storage fees are “calculated by cubic decimeter (per 10 cm x 10 cm x 10 cm)” — a leftover from a non-US version of the page. The US rate card immediately below it is stated per cubic foot throughout, and the worked examples use cubic feet. Read the rate tables, not that row.
The Storage Utilization Surcharge: Who Pays It, and How Much
The surcharge is a second, separate charge that lands on top of the base fee. It is not a replacement rate and not a penalty for old stock specifically — it prices slow turnover.
Amazon applies it only if you meet all four of these criteria (data checked 2026-08-20):
- You have a Professional selling account.
- Your first shipment to a US fulfillment center was more than 365 days ago.
- Your average daily inventory volume for that product size tier is at or above 25 cubic feet.
- Your storage utilization ratio for that size tier is above 22 weeks.
The ratio is your average daily inventory volume divided by your average daily shipped volume over the past 13 weeks, then divided by 7 — Amazon’s stated formula is (Daily inventory volume for the past 13 weeks / Daily shipped volume for the past 13 weeks) / (7 days in a week). It is calculated per size tier, so you can be surcharged on oversize and clean on standard-size in the same month. The ratio used is the one from the last day of the month.
Storage utilization surcharge (per cubic foot), non-dangerous goods:
| Storage utilization ratio | Standard-size | Oversize |
|---|---|---|
| Below 22 weeks | N/A | N/A |
| 22 – 28 weeks | $0.44 | $0.23 |
| 28 – 36 weeks | $0.76 | $0.46 |
| 36 – 44 weeks | $1.16 | $0.63 |
| 44 – 52 weeks | $1.58 | $0.76 |
| 52+ weeks | $1.88 | $1.26 |
| New sellers, Individual sellers, and sellers at or below 25 cubic feet daily volume | N/A | N/A |
The surcharge column is identical in Amazon’s off-peak and peak tables. Comparing the two rate cards cell by cell on 2026-08-20, the surcharge bands do not change between January–September and October–December — only the base fee does. So the worst case for standard-size is $2.40 + $1.88 = $4.28 per cubic foot in Q4, versus $0.78 + $1.88 = $2.66 off-peak.
One more limiter that softens the number: the surcharge applies only to inventory aged above 30 days, while the base fee applies to everything. Amazon’s own example makes this concrete: a standard-size product at a 25-week ratio in July, 0.05 cubic feet per unit, 100 average daily units of which 10 are aged above 30 days, pays $3.90 base plus $0.22 surcharge, for $4.12 total.
What Peak Season Really Costs, and When to Send Inventory In
From October through December the base rate multiplies by 3.08x for standard-size ($0.78 to $2.40) and 2.5x for oversize ($0.56 to $1.40); dangerous goods standard-size multiplies by 3.67x ($0.99 to $3.63). These multiples are arithmetic on the official rates above, not Amazon statements.
Put in dollars, using Amazon’s own sample unit of 0.05 cubic feet and 100 average daily units:
| Scenario (100 units, 0.05 cu ft each) | Base storage cost for that month |
|---|---|
| Stored in September (off-peak, standard-size) | $3.90 |
| Stored in November (peak, standard-size) | $12.00 |
| Stored in November (peak, oversize) | $7.00 |
| Stored in November, peak, 28–36 week ratio, all units aged 30+ days | $12.00 + $3.80 surcharge = $15.80 |
The practical reading for Q4 planning is not “send in late.” It is that each extra month of Q4 cover costs roughly three times what the same cover costs in summer, so the break-even question is whether a stockout risk in December is worth more than 3x storage on the safety stock. Two constraints bound that decision from the other side: FBA restock limits cap what you can send at all, and inbound receiving times lengthen in Q4, so the last genuinely safe inbound date is well before December.
Three FBA Storage Charges That Get Confused
| Charge | What triggers it | When it is assessed | Can you act on it mid-month? |
|---|---|---|---|
| Monthly inventory storage fee | Any FBA inventory occupying space | Daily average across the month; billed the 7th–15th of the next month | Partly — removals reduce average daily units going forward |
| Storage utilization surcharge | All four criteria met, incl. ratio above 22 weeks; applies to units aged 30+ days | Ratio read on the last day of the month | Yes — shipping or removing volume before month end changes the ratio used |
| Aged inventory surcharge | Units stored 181 days or longer | Inventory snapshot on the 15th, billed the 18th–22nd | Yes — but only if the removal completes before the 15th |
The aged inventory surcharge is a different fee with a different clock and its own escalating bands, including the steep step at day 271. It is covered in full in the Amazon aged inventory surcharge guide and deliberately not repeated here; a shorter, tactics-first take on the same charge sits at AMZFinder.
Four Levers That Actually Reduce the Bill
1. Raise sell-through to drop the ratio. The ratio is inventory volume over shipped volume, so it falls either by selling more or storing less. Amazon’s stated remedies are the same three: “improve your sell-through rate, request a liquidation order, or request a return or disposal order through a removal order.” The cost is that discounting to move volume trades margin for a fee reduction — worth it only when the surcharge band you would drop out of is worth more than the discount.
2. Fix the box before fixing the forecast. Because billing is per cubic foot of packaged volume, shaving packaging dimensions cuts every future storage invoice proportionally, with no effect on sales. It can also move a unit into a cheaper size tier and change fulfillment fees at the same time.
3. Move bulk cover to AWD. Amazon states that products auto-replenished by Amazon Warehousing and Distribution are eligible for a storage utilization surcharge waiver when 70% or more of FBA inventory units were auto-replenished in the past 13 weeks, and that qualifying products are removed from the ratio calculation before it is computed. On its FBA page Amazon separately describes AWD as pay-as-you-go pricing that “has no seasonal surcharges and includes FBA inbound placement services” (sell.amazon.com, data checked 2026-08-20). The AWD guide covers the trade-offs, including the added lead time.
4. Remove or liquidate the tail, on the calendar. Removals only help if they complete before the measurement date that matters — the last day of the month for the utilization ratio, the 15th for the aged inventory snapshot. Removal and disposal carry their own per-unit charges; see FBA removal orders before assuming removal is the cheap option.
What is not on this list: selling more, on its own. Volume that arrives after the ratio is read does nothing for that month’s bill.
Your Monthly Storage Fee Reconciliation Checklist
Run this once a month, ideally in the last week:
- Check the storage utilization ratio per size tier on the FBA Dashboard; Amazon flags when you are nearing or exceeding the 22-week threshold.
- If the ratio is above 22 weeks and daily volume is at or above 25 cubic feet, decide before the last day of the month whether to ship or remove volume.
- Pull the Monthly Storage Fees report and confirm the split between base fee and utilization surcharge matches what you expected.
- Compare the report’s product volume against your own packaged measurement; if it is off, Amazon’s FBA Remeasurement and Reimbursement tool exists for exactly this.
- Before the 15th, check aged inventory approaching 181 and 271 days.
- In September, price a Q4 storage scenario at the peak rate before committing the last inbound shipment.
Reimbursements Amazon does issue are worth checking rather than assuming. ReimburseOps is a self-serve audit tool for that step: you upload the FBA Reimbursements report exported from Seller Central, optionally with a sourcing-cost file, and it flags records that look under-reimbursed, inconsistently valued, or unmatched to a cost. It has a permanently free tier and a $19/month Pro plan for CSV export and monthly re-scans. It never connects to Seller Central, does not file claims for you, and is not affiliated with Amazon (data checked 2026-07-27).
Frequently Asked Questions
How much are Amazon FBA storage fees per month in 2026?
For non-dangerous goods, $0.78 per cubic foot per month for standard-size and $0.56 for oversize from January to September, and $2.40 and $1.40 from October to December (data checked 2026-08-20). A storage utilization surcharge of up to $1.88 per cubic foot may be added.
Does every seller pay the storage utilization surcharge?
No. All four criteria must be met: a Professional account, a first US shipment more than 365 days ago, average daily volume at or above 25 cubic feet for that size tier, and a storage utilization ratio above 22 weeks. New sellers and Individual sellers are not charged it.
Why is oversize cheaper per cubic foot than standard-size?
Amazon’s footnote on the rate card states that standard-size products, though smaller, “may require more complex and costly shelving, drawers, and bins for storage.”
When are FBA storage fees charged?
Monthly, typically between the 7th and 15th day of the month following the month in which the storage occurred. The aged inventory surcharge is separate: assessed on a snapshot taken on the 15th and billed between the 18th and 22nd.
Do removals reduce this month’s storage fee?
Partly. Units pending removal are subtracted from average daily units, and the utilization ratio is read on the last day of the month — so a removal that completes before month end affects that month. It cannot retroactively reduce the days already stored.
Bottom Line
The base rate card is the easy part, and it is small: most sellers’ monthly storage fee on healthy inventory is a rounding error against referral and fulfillment fees. The bill becomes visible in two situations — Q4, where the rate triples for standard-size, and slow turnover, where the utilization surcharge can more than double the effective rate on everything older than 30 days. Both are measured on dates you can see in advance, which makes storage one of the few FBA costs you can still change after the inventory is already in the network.