Key takeaways
- FBA storage fees are charged per cubic foot per month, with volume rounded up so you often pay for space your product does not occupy.
- US peak-season rates roughly triple holding costs from October through December, hitting slow-moving SKUs hardest.
- Aged-inventory surcharges stack on top of monthly fees once units pass roughly 181 days in a fulfilment centre.
- The same SKU stored for a year costs about $3.16 in the US, £1.90 in the UK, and ₹140 in India before surcharges.
- Sell down or remove slow stock before October and pull the Inventory Age report weekly to avoid paying peak rates on dead inventory.
Amazon FBA storage fees are charged per cubic foot per month, and they're one of the most commonly underestimated lines in your true net profit per unit. On a slow-moving SKU, storage can quietly eat $1-2 per unit before you ever check Seller Central, which is exactly why sales and ACOS can look fine while your reorder cash comes in short. This guide runs one identical SKU through the US, UK, and India rate cards so you can see the per-unit damage side by side.
How are FBA storage fees calculated step by step?
Every storage fee comes from one formula: your unit's volume in cubic feet multiplied by the monthly rate per cubic foot. The rate itself varies by marketplace and season, but the mechanics never change. Here is what happens before that rate ever touches your SKU.
Step 1: Amazon measures your unit's volume
Amazon calculates volume from the dimensions of the packaged unit, not the product itself. It multiplies length × width × height in inches, divides by 1728 to get cubic feet, and then applies rounding rules: dimensions are rounded up to the nearest inch, and total volume is rounded up to the nearest whole cubic foot for the fee. Bulky packaging inflates this number, which is why repackaging before inbound is one of the few levers you control.
Step 2: Volume is multiplied by the monthly rate
Cubic feet × the current monthly rate per cubic foot gives the fee, charged on units stored at month end. That fee lands directly in your cost stack, so it subtracts from net profit per unit before you ever look at ACOS or TACOS.
Step 3: Duration and season change the rate
The rate is not fixed. It rises in Q4, and units sitting past a set age threshold pick up an additional aged-inventory surcharge. Amazon publishes both on its FBA storage fee rate card, so check it per marketplace before forecasting reorder cash. If you want the ad-side of that same per-unit math, our ACOS calculator handles breakeven ACOS alongside fees.
What are Amazon FBA monthly storage fees in the US, UK, and India?
Monthly storage is charged per cubic foot of space your inventory occupies, billed on the 7th of each month for the month prior. Rates differ by marketplace, season, and size tier (standard vs oversize). The table below shows the approximate rate structure as of recent rate cards; always confirm against the current fee page in Seller Central before forecasting, since Amazon revises these annually.
| Marketplace | Standard, off-peak (Jan–Sep) | Standard, peak (Oct–Dec) | Oversize, off-peak | Oversize, peak |
|---|---|---|---|---|
| US | ~$0.78/cu ft | ~$2.40/cu ft | ~$0.56/cu ft | ~$1.40/cu ft |
| UK | ~£0.63/cu ft | ~£0.90/cu ft | ~£0.45/cu ft | ~£0.65/cu ft |
| India | ~₹45/cu ft | ~₹75/cu ft | higher tiered rates | higher tiered rates |
These are illustrative figures for standard-size units; dangerous goods and oversize units carry separate, higher schedules.
US rate card
The US jump from roughly $0.78 to $2.40 per cubic foot in Q4 triples your holding cost overnight. A slow-moving SKU that cost pennies to store in August can quietly eat $10+ by December.
UK rate card
UK peak pricing rises less steeply than the US, but the lower absolute rates hide a common trap: fees are per cubic foot, so bulky low-value units lose money at any season. Check per-unit storage against your net margin, not just revenue.
India rate card
India uses tiered rates by volume band and applies surcharges for high-inventory periods. If you sell across marketplaces, run the same SKU through each rate card before deciding where to hold stock. Our FBA profit calculator folds storage into net profit per unit so you see reorder cash, not just sales.
How do peak-season (Q4) storage rates differ from off-peak rates?
In the US and UK, Amazon charges higher monthly storage rates for October through December than for January through September. The increase is largest in October: per Amazon's UK rate card, October rates are roughly double the off-peak rate, then taper in November and December (Amazon Seller Central UK storage fee rate card). For a slow-moving SKU, that jump lands directly on net profit per unit. A unit sitting in October pays about twice the usual fee, and if it also crosses into long-term storage territory in January, you pay the Q4 premium and the surcharge on the same stock. The practical fix is timing: sell down or remove slow stock before October, so you are not paying peak rates to warehouse inventory that was not reordering anyway. SellerMatrix flags this in its Monday review when a SKU's projected storage cost at peak rates turns its true profit negative (SellerMatrix).
When do Amazon FBA long-term storage fees apply and how much do they cost?
The aged-inventory surcharge is separate from the monthly fee and stacks on top of it. It triggers on dwell time: how long a unit has sat in an Amazon fulfilment centre, measured from the date it first received inventory. Cross a threshold and Amazon bills the surcharge monthly on every unit past that age, whether it sells that month or not.
US aged inventory surcharge
In the US marketplace, units sitting roughly 181 to 365 days carry one surcharge rate per cubic foot, and units past 365 days jump to a much higher rate. Because it is charged on volume, not units, bulky slow movers hurt most.
UK aged inventory surcharge
The UK uses the same dwell-time structure: a surcharge from about six months of storage, escalating sharply past the one-year mark.
India aged inventory surcharge
India follows a comparable tiered model, with the steepest rate on inventory aged beyond a year.
The practical fix is the same everywhere: pull an aged inventory report weekly, mark up your per-unit true profit for any SKU approaching 181 days, and discount or remove before the tier hits. If you want that check run for you each Monday, our affiliate partners can help you get set up.
How does cubic footage measurement affect your storage fee?
Amazon charges storage on the cubic footage of your unit, calculated as height × width × length in inches, divided by 1,728, then rounded up to the nearest 0.5 cubic foot. Amazon's own rate card for the India marketplace states the fee is applied per cubic foot of the unit's volume.
Worked example: a 14 × 10 × 8 inch box is 1,120 ÷ 1,728 = 0.648 cubic feet, which rounds to 1.0. A real volume of 0.7 gets billed as 1.0 too, so you pay for 43% more space than the product occupies.
That rounding compounds across a pallet: 60 units billed at 1.0 cubic foot each means paying for 60 cubic feet when the goods occupy roughly 42. At US off-peak rates around $0.78 per cubic foot, that gap is roughly $14 per pallet per month, every month, straight off net profit per unit before PPC, COGS, or refunds touch it.
What does the same SKU actually cost to store in the US, UK, and India?
Take one SKU: a 12 x 8 x 4 inch box, 0.222 cubic feet after Amazon's rounding. Rates below are illustrative, using typical standard-size monthly rates (US $0.78/cu ft off-peak and $2.40 in Q4; UK £0.65 and £0.90; India ₹45 and ₹75). Check your marketplace's current rate card before budgeting.
Worked example: off-peak, 30 days
One month off-peak costs $0.17 in the US, £0.14 in the UK, and ₹10 in India. Cheap enough to ignore, which is exactly why slow SKUs hide.
Worked example: Q4, 180 days
Six months spanning Q4 (two peak months, four off-peak) costs $1.76 in the US, £0.98 in the UK, and ₹73 in India. The same unit-time, roughly ten times the 30-day bill, purely because of which months it sat there.
Worked example: 365 days with surcharge
A full year runs $3.16 in the US, £1.90 in the UK, and ₹140 in India, before the long-term surcharge that kicks in at 365 days, roughly $6.90 per unit in the US. That surcharge alone can exceed the unit's entire annual storage bill.
This is the arithmetic your profit tool should be doing for you, but most sellers never check it. Sellerboard, tool4seller, and Seller Central's own reports will all show you the fee after it lands; none of them tell you on Monday morning that this one SKU has been quietly eating reorder cash since March. Run the numbers yourself once: take your slowest ASIN, multiply its cubic feet by your marketplace's rate card across the months it actually sat, and compare the total to its true net profit per unit. If storage plus the surcharge approaches that margin, the correct move is a removal order or an outbound price cut, not another ad budget increase. That single calculation, done quarterly, protects more reorder cash than any ACOS tweak.
How can sellers reduce FBA storage fees without hurting IPI scores?
Fix sell-through before you fix storage
IPI penalises excess inventory, so the fix is raising sell-through, not hoarding stock elsewhere. Pull a 90-day sell-through per SKU, then reorder less of anything under 60 days of cover. Bundling a slow mover with a fast seller clears units at full margin instead of paying storage to wait.
Removal orders vs disposal fees
Disposal is cheaper per unit than a removal order, but removal lets you relist the stock on another channel or bundle it back in. For a SKU with real margin left, removal usually wins; for dead stock, disposal stops the monthly bleed.
When to just pull inventory out of FBA
If a SKU will sit through Q4 peak rates, a removal order before the rate hike often costs less than two months of storage. Check Amazon's own guidance on storage classifications before you move anything, since hazmat items follow separate rules.
What tools or reports show your exact storage fee breakdown in Seller Central?
Native Seller Central reports
Three reports carry the numbers. The Storage Fee report (Reports → Payments → Date Range, or the FBA Storage page) lists the exact monthly and long-term surcharge charged per SKU, including the dangerous goods rate if it applies. The Inventory Ledger shows the units in and out, so you can tie the fee back to the inventory that earned it. The FBA Inventory Age report shows where each SKU sits in the 181-365 and 365+ day bands that trigger the surcharge.
Profit tools compared on storage visibility
Sellerboard, Helium 10, tool4seller, and My Real Profit all fold storage fees into net profit per unit, so a slow SKU shows its true margin, not just the PPC-adjusted one. Seller Central's native dashboards show the fees but never join them to per-unit profit.
SellerMatrix is honest about its gap: it pulls the monthly storage fee into Monday's net profit per unit and reorder cash, but the long-term surcharge is estimated from the inventory age report, not read from your actual invoice, so a 365+ day SKU can be slightly off until the charge lands.
FAQ
Do FBA storage fees include VAT in the UK, and can I reclaim it?
UK storage fees are quoted exclusive of VAT, and 20% is added to the invoice. If your business is VAT registered, you can reclaim that VAT on your return as input tax, provided the fee is attributable to taxable supplies. Non-registered sellers absorb it, making effective per-unit storage roughly 20% higher than the rate card figure.
Why is my storage fee higher than the rate card says it should be?
Three usual culprits: Amazon rounds your unit's volume up to the nearest 0.5 cubic foot, so you pay for space the product does not occupy. Peak-season rates apply from October, roughly doubling the bill. And if any unit crossed the 181-day age threshold, the aged-inventory surcharge stacks on top of the monthly fee.
Are dangerous goods (hazmat) charged different storage rates?
Yes. Hazmat inventory sits in a separate, higher rate schedule than standard-size or oversize units, and the surcharge appears on your Storage Fee report line by line. Batteries, aerosols, and flammable liquids are common triggers. Check the classification before sending inbound, because hazmat also follows different removal and disposal rules.
Do I pay storage fees on unsellable or returned inventory?
You do. Storage is charged on whatever occupies space in a fulfilment centre at month end, including unfulfillable units and customer returns waiting in the returns processing queue. Returned stock can sit for weeks before it is dispositioned, so a high return rate quietly inflates your storage bill on inventory that cannot even be resold.
How do storage fees change my breakeven ACOS?
Breakeven ACOS is ad spend divided by the margin you have left after every other cost. Storage shrinks that margin, so the breakeven ACOS falls. A slow SKU that pays $1-2 per unit in storage over its dwell time has far less room for ads than the same SKU turning in 30 days, even though revenue looks identical.