Amazon Q4 2026 FBA Fees: The Two Windows Do Not Line Up | Inventory Hero
·22 min readFBA Fees
Amazon Q4 2026 FBA Fees: The Two Windows Do Not Line Up
Amazon's Q4 2026 FBA fee windows are misaligned: peak storage runs Oct 1 to Dec 31, peak fulfillment Oct 15 to Jan 14. What that does to one unit, worked out.
T. Brian Jones is co-founder and CTO of Inventory Hero. He leads the engineering behind its Amazon data pipeline, demand forecasting, and the AI platform that lets sellers talk to their live inventory, sales, and supplier data in plain language.
Q4 does not have one number, it has three overlapping charges. The holiday peak fulfillment surcharge is reported at an average of about $0.32 per unit from October 15, 2026 through January 14, 2027, the 3.5% fuel and logistics surcharge adds about 3.5% of your fulfillment fee, and standard-size monthly storage rises from $0.78 to $2.40 per cubic foot for October, November, and December. On a mid-size standard unit the combined effect is roughly 1% to 3% of the sale price. The $0.32 is a trade-press average across all size tiers, so a specific SKU can easily land 15 cents either side of it. Pull your own peak rate per ASIN from the FBA Revenue Calculator, which already shows peak pricing.
Why do Amazon's Q4 storage and fulfillment windows have different dates?
Amazon prices them for different reasons. Storage is priced to clear warehouse space before the holiday inbound wave, so the elevated rate starts October 1 and ends December 31 with the calendar quarter. Fulfillment is priced for shipping-network load, which peaks later and runs into returns season, so the surcharge starts October 15 and continues through January 14. The practical consequences are that your pre-peak drawdown deadline is October 1, and that early-January sales pay a peak fulfillment fee on standard-rate storage.
Does the 3.5% fuel surcharge apply on top of the Q4 peak fee?
It does. Amazon has said the fuel and logistics surcharge applies in addition to the holiday charges and stays in effect until further notice. What Amazon has not published is whether the 3.5% is calculated on the base fulfillment fee alone or on the base plus the peak surcharge. On a mid-size standard unit those two readings differ by about a penny, which is a reconciliation detail rather than a planning input.
Do Amazon's Q4 storage rates continue into January 2027?
They do not. Standard-size storage drops from $2.40 back to $0.78 per cubic foot on January 1. Peak fulfillment is the charge that carries into the new year, through January 14. So if you feel pressure to clear stock in January, name the actual reason: the cash is trapped and the 181-day aging clock kept running all quarter. It is not the storage rate, which has already reset.
Should I buy less Q4 inventory because of the higher storage fees?
Not on the storage math alone. On a 0.08 cu ft standard-size unit, a full peak quarter of storage is about 58 cents against roughly $9 of contribution margin, so you can hold about 15 extra units for the cost of one stockout. With Q4 demand skewed to the upside, that ratio argues for buying to the optimistic case, not the conservative one. The real limits on Q4 buy quantity are what happens to the leftovers: the aged-inventory surcharge once units pass 181 days, the cash locked up until they sell, and your FBA capacity limits. Size the order against the Q1 tail, not against peak storage.
Should I raise prices in Q4 to cover the higher FBA fees?
Usually no. The whole Q4 stack is roughly 1% to 3% of the sale price on a typical standard-size unit, and Q4 is a poor quarter to test price, partly because Amazon's deal pricing rules look back at your recent prices and a bump can cost you deal eligibility. Absorb the fulfillment side. Reprice only where the loaded peak fees push a SKU below your own contribution-margin floor, and note that price elasticity varies enormously between gift categories and commodity ones, so your category may not behave like the average.
Amazon's two Q4 2026 fee windows do not cover the same dates. Peak storage runs October 1 through December 31 and reverts on January 1. Peak fulfillment runs October 15 through January 14.12 Two things fall out of that misalignment, and both cost money: your pre-peak drawdown deadline is October 1, two weeks earlier than the date most Q4 checklists circle, and a unit that sells on January 5 pays a peak fulfillment fee on standard-rate storage. Underneath the calendar sits the stacking math, which is three separate charges landing on the same unit. Below is the misalignment first, then the stack worked out on a single unit so you can see which layer is actually worth your attention.
The two windows are set for different reasons. Storage pricing is about warehouse space, and Amazon wants that space cleared before the holiday inbound wave, so the elevated rate starts with the quarter on October 1. Fulfillment pricing is about network load, which peaks later and runs through returns season, so it starts October 15 and continues past New Year.
Three consequences worth planning around:
Your drawdown deadline is October 1, not October 15. Every unit still sitting in a fulfillment center on the October snapshot pays the $2.40 rate for the month. If you have been treating October 15 as the moment Q4 gets expensive, you are two weeks late on the only layer of the stack you control. Removal orders and liquidation take weeks to process, so the actual decision lands in early-to-mid September.
Early-January sales are the expensive ones. A unit that sells January 5 pays the peak fulfillment fee, because that window runs to January 14, but it is stored at the standard $0.78 rate, because storage already reset. That is the one combination that surprises people reconciling January settlements.
January urgency is not a storage-rate story. Storage is cheap again on January 1. If you are pushing to clear stock in January, the honest reasons are that the cash is trapped and the 181-day aged-inventory clock ran all quarter. Say that out loud, because it changes what you do: it argues for liquidating dead SKUs and holding good ones, rather than dumping everything.
Four layers, applied by three different mechanisms:
Q4 FBA fee stack
The combined effect of Amazon's holiday peak fulfillment surcharge, the temporary fuel and logistics surcharge, and elevated Q4 storage rates all applying to the same unit of inventory in the same quarter, on top of the base fulfillment fee.
Base fulfillment fee. Unchanged, set by size tier and price band. A large-standard unit between 1 and 1.25 lb in the $10 to $50 band is $5.04.1
Holiday peak surcharge. Reported at an average of about $0.32 per unit, October 15, 2026 through January 14, 2027, across FBA, Remote Fulfillment with FBA, MCF, and Buy with Prime.2 Amazon's own playbook states the window and says the average per-unit increase matches last year, but does not publish a headline figure, so treat $0.32 as a trade-press average and pull your own.3
Fuel and logistics surcharge. 3.5% calculated on your fulfillment fees, not on the sale price, effective April 17, 2026 for US and Canada FBA. Amazon calls it temporary, has given no end date, and says it applies on top of the holiday charges.42
Peak storage. Standard-size monthly storage goes from $0.78 to $2.40 per cubic foot, oversize from $0.56 to $1.40, for October, November, and December.1
Layers 1 to 3 are charged per unit shipped. Layer 4 is charged per unit held. That split is what makes the window dates matter, and it is the whole argument of this article.
Take a large-standard SKU: 1.1 lb, 0.08 cubic feet, sells for $29.99. Assume it lands in October and sells in November, so it is on hand for two peak storage months. Same unit, same SKU, two different months.
Layer
May (off-peak)
November (peak)
Base fulfillment
$5.04
$5.04
Holiday peak surcharge
none
$0.32
Fuel surcharge (3.5%)
$0.18
$0.19
Storage, 2 months x 0.08 cu ft
2 x $0.062 = $0.12
2 x $0.192 = $0.38
All-in fulfillment + storage
$5.34
$5.93
That is $0.59 more per unit on the fulfillment-and-storage line, about 11%. Note the noun carefully: 11% is the change in fulfillment plus storage, not in what Amazon takes overall. Add the $4.50 referral fee and total Amazon cost per unit goes from $9.84 to $10.43, which is 6.0%. Both numbers are true; the second is the one to quote if someone asks how much more Amazon costs in Q4.
Run it through contribution margin at an $8.00 landed cost, 15% referral, and $2.50 of per-unit Sponsored Products spend:
May
November
Sale price
$29.99
$29.99
Referral (15%)
$4.50
$4.50
Fulfillment + storage
$5.34
$5.93
Landed cost
$8.00
$8.00
Per-unit ad spend
$2.50
$2.50
Contribution margin
$9.65 (32.2%)
$9.06 (30.2%)
Swap in your own inputs before you trust any of this. The 15% referral rate, the $8.00 landed cost, and the $2.50 of ad spend are illustrative placeholders, not defaults. Referral runs from 8% to 17% by category, landed cost is yours alone, and ad spend per unit varies more than every fee on this page combined. What carries across SKUs is the shape of the stack and the window dates, not the totals. Model your own numbers in the FBA fee calculator and the FBA profit calculator; if you are not sure how to define the margin line, see contribution margin.
The 0.08 cu ft unit above is small, and storage is only 38 cents of its $5.93. That is why the storage layer feels theoretical to a lot of sellers. Change one input, volume, and the picture changes completely:
Unit volume
Peak storage per month
3 peak months
Storage as a share of the Q4 increase
0.08 cu ft
$0.192
$0.58
small, the surcharges dominate
0.4 cu ft
$0.96
$2.88
dominant, the surcharges are noise
A 0.4 cu ft standard-size unit pays $2.88 in peak storage across the quarter, roughly five times the entire fee increase on the small unit. (Its base fulfillment fee is also higher, because at that volume dimensional weight rather than unit weight sets the billing weight, so pull that one per ASIN rather than reusing the $5.04 above.)1 The rule of thumb: below about 0.15 cu ft, the storage layer is a rounding error and you should spend your attention on the per-unit surcharges and on size tier. Above about 0.3 cu ft, storage is the story.
Amazon has confirmed the 3.5% is computed on your fulfillment fees rather than your sale price, and that it applies on top of the holiday charge.42 What has not been spelled out publicly is whether "fulfillment fees" for that calculation means the base rate alone or the base plus the peak surcharge. Both readings are defensible from the published wording, so here is the range rather than a guess.
On a $5.04 base fee with a $0.32 peak surcharge:
3.5% of the base only: 0.035 x 5.04 = $0.1764, billed as $0.18
3.5% of base plus peak: 0.035 x 5.36 = $0.1876, billed as $0.19
About a penny apart, which is one twentieth of the error bar on the $0.32 itself. This article uses the higher reading. It matters for a spreadsheet that has to tie out to the settlement report, not for a Q4 plan. (Amazon quotes the fuel surcharge at roughly $0.17 per unit, but that is an average across its whole size-tier mix, not this SKU. The $0.18 to $0.19 above is 3.5% of this specific unit's fulfillment fee, which is why yours will differ.)4 Your invoiced number is what settles it, and you can see it per ASIN in the FBA Revenue Calculator, which already reflects both the peak rates and the surcharge.43
Change one variable: how long the unit sits. Same SKU, but it lands in late September and does not sell until January 5.
Layer
Fast unit (lands Oct, sells Nov, 2 months on hand)
Slow unit (lands late Sept, sells Jan 5, sits Oct to Dec)
Fulfillment all-in
$5.55
$5.55
Peak storage months
2
3
Storage cost
$0.38
3 x $0.192 = $0.58
All-in
$5.93
$6.13
Two things to read off that table, and one thing not to. Read off the fulfillment line: it did not change. The January 5 sale still pays the peak fulfillment fee, because that window runs to January 14. Read off the storage line: three billing months instead of two, because the slow unit was on hand for the October, November, and December snapshots.
What not to read off it: that slow units cost three times more. They do not. On this SKU the slow unit costs 3.4% more than the fast one, twenty cents. "Three times" describes how many times peak storage is billed, not the size of the penalty. On the 0.4 cu ft SKU from the previous section the same three-versus-two months is about a dollar, which is when it starts mattering.
This is where most Q4 fee articles, including an earlier draft of this one, go wrong. They compute the storage cost of holding too much, never compute the cost of holding too little, and then conclude that you should buy conservatively. Run both sides.
Cost of one extra unit you did not need. It sits the full peak quarter and pays 3 x 0.08 x $2.40 = $0.58 of peak storage. If it eventually sells in Q1, that is the entire cost of having been early.
Cost of one unit you needed and did not have. You lose the contribution margin, $9.06 on this SKU, plus whatever the rank and ad-momentum damage is worth, which is real and not in this number.
The break-even ratio.$9.06 / $0.58 = 15.6. You can carry about 15 extra units through the entire peak quarter for the cost of a single lost sale. On the 0.4 cu ft SKU, where a peak quarter costs $2.88, the ratio is about 3 to 1. It is still lopsided, just less so.
That ratio, plus the fact that Q4 demand error skews to the upside, means peak storage cost cannot carry a buy-tighter recommendation. On a healthy-margin SKU with genuine Q4 demand, the expected-value math runs the other way: overbuying is cheap insurance and underbuying is expensive.
So what does limit the Q4 buy? Not the storage rate. Three other things, all of which live after the quarter ends:
The aged-inventory surcharge. Units still sitting past 181 days pay a monthly surcharge that escalates with age, on top of storage.5 A Q4 overbuy that clears in January costs you 58 cents a unit. A Q4 overbuy that is still there in April is a different category of problem. The question is not "will this sell in Q4," it is "if it does not sell in Q4, does it sell in Q1?" Buy to the upside on evergreen SKUs. Buy tight on anything genuinely seasonal, where unsold units have no Q1 demand to fall into.
Cash. Every extra unit is landed cost sitting on a shelf, $8.00 here, and Q4 is when working capital is most contested. That constraint is about your bank balance, not about Amazon's fee schedule, and it is usually the binding one.
Capacity limits. FBA capacity is finite in Q4. Units of a slow SKU consume space that a fast SKU needed, and that opportunity cost is much larger than 58 cents.
To make that concrete: carrying 1,000 units of this SKU on average instead of 650 costs an extra 350 x 0.08 x $2.40 = $67 per month, about $200 across the peak quarter for one SKU. That sounds like real money until you put the denominator on it: $200 is about 22 lost sales at $9.06 of margin. So cutting 350 units of average on-hand only pays if fewer than 22 of them would have sold. On a SKU with upside, it does not. On a dead SKU already past 181 days, it is free money, because those units were never going to sell and are paying the aged surcharge on top. The lever is not "hold less," it is "hold less of the stuff that is not moving."
That is the one buy-side rule this article will actually defend: draw down aged and slow stock before October 1, and let good SKUs run long. The dates cut the same way. October 1 is the storage deadline for the units you want gone; the fulfillment surcharge on the units you want to sell is unavoidable anyway.
Pull the age report first. The FBA inventory age report (Seller Central, under Reports, then Fulfillment, then Inventory Age) buckets every SKU by days on hand: 0 to 90, 91 to 180, 181 to 270, 271 to 365, and 365+. Anything already past 181 days on October 1 is paying peak storage plus the aged-inventory surcharge simultaneously. That is the worst cell in the whole grid and the first thing to clear. Estimate what a month of holding costs in the FBA storage fee calculator.
Then set the January date now. In the first week of January, pull Inventory Age again and filter to everything that will cross 181 days before Amazon's next monthly inventory snapshot. Those units get a decision that week: promote, bundle, liquidate, or file a removal order. Cross-check them against Reports > Fulfillment > Monthly Inventory Storage Fees for December, which shows what you were actually charged and the cubic feet Amazon measured. Putting the date on the calendar in September is the point; January is when the temptation to wait one more month is strongest.
Before you spend a week optimizing $0.59, note that two other Q4 costs on the same unit are larger.
Q4 ad inflation. The tables above hold ad spend flat at $2.50, which is a modeling convenience, not a forecast. Q4 CPCs rise materially as every seller in your category bids into the same holiday traffic. A 25% increase in per-unit ad cost is $0.63, larger than the entire fee stack. So the honest framing: the Q4 fee stack is a second-order cost behind ad inflation. It is worth understanding because it is knowable and fixed, while your Q4 ad efficiency is neither. But if you are optimizing the fee stack while your ACoS drifts, you are working the smaller number.
Size tier and dimensions. The stack does not touch the base fulfillment fee, and the base fee is the largest controllable line on the unit, $5.04 of the $5.93 here. Shaving billed weight under 1 lb moves a large-standard unit from $5.04 to $4.60, a $0.44 saving that is roughly the size of the entire Q4 stack, every month of the year.1 Crossing the other way, from large standard into small bulky, takes the fee from $5.04 to $7.55.1 One tier change is worth four Q4 stacks. If a packaging redesign can pull a SKU down a band before your Q4 inbound, that is a better use of September than any fee-stack spreadsheet.
Absorb it, in almost every case, and take the money back on the storage side of the slow SKUs instead.
The arithmetic: on a typical standard-size unit the entire Q4 stack costs roughly 1% to 3% of the sale price. In the example above it is $0.59 on $29.99, about 2%. Recovering that through price means a 2% increase in the single quarter where traffic is most contested and where Amazon's deal pricing rules look back at your recent prices, so a Q4 bump can cost you deal eligibility on top of any units it costs you.
Whether that trade is bad depends on your elasticity, and elasticity is not a constant. Gift-driven categories with weak substitutes often tolerate a small Q4 increase; commodity categories with a dozen comparable listings on the same search page usually do not. We would not raise price to recover 2% without category evidence, but that is a default, not a law. If you have run price tests on the SKU, trust your data over this paragraph.
The rule we would actually follow:
Contribution margin still above roughly 25% after the stack: absorb it. Cut days of cover on the slow movers instead.
Between about 15% and 25%: absorb it, but stop advertising into it. Two points of margin plus an unprofitable ACoS is where Q4 volume starts destroying value.
Below about 15%, or negative after the stack: reprice, or do not run the SKU through peak at all. A thin SKU that only works at off-peak fees is a SKU that should not be carrying Q4 inventory.
Those are operator rules of thumb, not Amazon guidance, and the specific numbers come from a simple test: 25% is roughly where a SKU still covers a typical small brand's overhead, returns, and reimbursement leakage with something left; 15% is roughly where a normal Q4 return rate and a mediocre ACoS can take the SKU to zero. Both assumptions are ours, not yours. If your overhead is high, or you carry a warehouse or a team, your floor is higher and these thresholds are too generous. If you are a lean operator with almost no fixed cost, a 12% SKU can still be worth running for cash. Set the floor from your own P&L, then check every SKU against it with peak fees loaded, not September's fee table.
Do not model the stack from this article, model it from your account. Every layer has a screen:
Peak fulfillment fee per ASIN: the FBA Revenue Calculator in Seller Central already shows peak rates, and the Fee and Economics Preview Report gives you the same thing in bulk.3 This is the only version of the $0.32 that is true for your SKU, and the only way to close the error bar above.
Fuel surcharge: reflected in the Revenue Calculator, Profit Analytics, and the Fee and Economics Preview Report since April 2026.4
What you were actually charged for storage: Reports > Fulfillment > Monthly Inventory Storage Fees, itemized per SKU with the cubic feet Amazon measured. Check the measured volume against your own carton spec; a re-measure is a silent Q4 cost, and on a bulky SKU it is a bigger one than the peak surcharge.
How long units have been sitting: the FBA inventory age report (Reports > Fulfillment > Inventory Age), which is what tells you whether a SKU is on the fast or the slow row of the table above.
Amazon's two Q4 windows do not line up, and that mismatch is worth more to your plan than the stacking arithmetic is. Storage peaks October 1 and resets January 1; fulfillment peaks October 15 and runs to January 14. So September is when the storage decision is due, and January 5 sales pay peak fulfillment on cheap storage.
On the stack itself, keep the magnitudes straight. About $0.59 and two points of contribution margin on a small standard unit, with a real error bar on the largest input; more on bulky SKUs, where storage dominates; and smaller either way than Q4 ad inflation or one size-tier change. Peak storage is the only layer you control, but it is cheap enough per unit that it should not make you buy conservatively into a quarter where the demand error skews up. Pull your peak rates per ASIN this month, re-run contribution margin with them loaded, clear anything past 181 days before October 1, and buy the good SKUs long. The sellers who get hurt by Q4 are not the ones who bought too much of something that sells. They are the ones still holding the stuff that never did.
Base fulfillment and storage rates are from Amazon's published US fee schedule (sell.amazon.com/pricing, 2026 US rate card effective January 15, 2026), carried in Inventory Hero's reference-data registry (lib/reference-data/registry.ts, re-verified 2026-08-10) and mirrored in lib/fees/amazon.ts so this article and our calculators agree: large standard up to 1 lb in the $10 to $50 price band, $4.60; large standard 1 to 1.25 lb in the same band, $5.04; small bulky base, $7.55; standard-size monthly storage $0.78 per cubic foot off-peak (January to September) and $2.40 per cubic foot peak (October to December); oversize $0.56 and $1.40 respectively. Referral fee shown at the 15% rate that applies to most categories. Large-standard billing weight is the greater of unit weight and dimensional weight, which is why a high-volume, low-weight unit prices above its scale weight. ↩↩2↩3↩4↩5↩6↩7
Supply Chain Dive, "Amazon announces 2026 holiday fulfillment fees, advises early shipping," July 13, 2026, supplychaindive.com/news/amazon-announces-2026-holiday-fulfillment-fees-advises-early-shipping/824962/. Reports a holiday fulfillment fee increase averaging $0.32 per unit, effective October 15, 2026 through January 14, 2027, across FBA, Remote Fulfillment with FBA, Multi-Channel Fulfillment, and Buy with Prime, with fees calculated and charged when shipments leave fulfillment centers. Also reports Amazon saying the 3.5% fuel and logistics surcharge "will apply on top of the holiday charges" and remains "in effect until further notice." The $0.32 is a trade-press figure reporting Amazon's announcement, not a number Amazon publishes on its own fee pages, and it is an average across size tiers, which is why this article carries an explicit range around it. ↩
Amazon Seller Central, "Q4 2026 peak readiness playbook" (sellercentral.amazon.com/help/hub/reference/G4QH4XCRWUXRJBLY), accessed August 2026. Seller Central login required. States the October 15, 2026 to January 14, 2027 peak fee window and that the average per-unit increase over non-peak rates matches last year's, without publishing a headline dollar figure, and directs sellers to the Revenue Calculator and the Fee and Economics Preview Report for per-SKU peak rates. ↩↩2↩3
Amazon Seller Central announcement, "Fuel and logistics-related surcharge: FBA, MCF, and BWP in US and CA," April 2026: a 3.5% fuel and logistics-related surcharge effective April 17, 2026 for FBA in the US and Canada (and Remote Fulfillment with FBA into Canada, Mexico, and Brazil), and May 2, 2026 for Buy with Prime in the US and MCF in the US and Canada. Amazon states the surcharge "will be calculated on your fulfillment fees, not on the sale price of your items," equating to about $0.17 per unit on average for US FBA, and that the Revenue Calculator, Profit Analytics, and Fee and Economics Preview reports reflect it. Amazon describes it as temporary with no stated end date. Mirrored in Inventory Hero's reference-data registry (lib/reference-data/registry.ts, re-verified 2026-08-10), which deliberately does not model the surcharge in our fee calculators because Amazon applies it at invoice time on top of published base rates. ↩↩2↩3↩4↩5
Amazon's aged-inventory surcharge applies monthly to units held in fulfillment centers beyond 181 days and escalates with further age, charged on top of monthly storage. Amounts vary by age bucket and size tier and are not carried in Inventory Hero's reference-data registry, so no dollar figure is quoted here; see Amazon aged inventory surcharge in 2026 and pull your own exposure from the FBA inventory age report. ↩