Amazon Peak Fulfillment Fee 2026: Per-Unit Math

Amazon's 2026 holiday peak fulfillment fee runs from October 15, 2026 to January 14, 2027. It applies to FBA, Remote Fulfillment with FBA, Multi-Channel Fulfillment and Buy with Prime. The average increase is about $0.32 per unit over non-peak rates, the same average as last year.

Those dates and that average come from trade coverage of Amazon's July announcement, mainly eCommerce North America's July 14 write-up. I have not reviewed the Seller Central notice itself. I checked Amazon's public FBA holiday guide on October 5, 2026, and it does not list the fee. So treat $0.32 as Amazon's reported average, not as the rate on any one of your SKUs, and look up your own tiers in Seller Central before you trust my numbers over yours.

The part the headlines skip is the stack. The 3.5% surcharge from April applies on top of peak rates too. So I ran it on the same SKU I used for the surcharge math.

The Same SKU, Three Fee Periods

The SKU is a large standard item at 1 lb. Its 2026 base fulfillment fee is $4.82. The surcharge took it to $4.99 in April. Now add the peak increment.

I am using the $0.32 average here because I have not verified the tier-level peak rate against an Amazon page. Your real increment for this tier could be higher or lower.

Step	Math	Per unit
2026 base fee (January)		$4.82
Surcharge on the base	$4.82 x 0.035 = $0.17	$4.99
Peak increment, reported average	$4.82 + $0.32	$5.14
Surcharge on the peak rate	$5.14 x 0.035 = $0.18	$5.32

So during the 2026 peak period this unit costs $5.32 to fulfill, against $4.99 the rest of the year. That is $0.33 per unit, a penny more than the headline $0.32, because the surcharge is a percentage and the peak increment raises the base it multiplies.

Against January's $4.82, it is $0.50 per unit. About 10% more than the fee you probably still have typed into your spreadsheet.

At 3,000 units a month, the three-month window is 9,000 units. 9,000 x $0.33 = $2,970 in extra fulfillment fees on one SKU, before any other Q4 cost moves.

You will see "about $0.62 all-in" quoted elsewhere. I would not plan on it. It is somebody else's stack of assumptions, and the number that matters is the one you get from your own fee tiers. For this SKU, my number is $0.33 over current rates and $0.50 over January.

Where the Fee Really Hurts: The Q4 Overbuy

One correction before the planning part, because the opposite gets repeated a lot. Inventory left in FBA after January 14 does not keep paying peak rates. Amazon charges the fulfillment fee when a unit ships. A unit that ships on January 15, 2027 pays the non-peak rate.

So the peak fee does not punish overstock directly. It punishes the two things sellers do about overstock.

The first is storage. Units ordered for a Q4 that never comes sit through October to December at Amazon's Q4 storage rates, the highest of the year.

The second is the December fire sale. Here is what it does to the same SKU.

Illustrative assumptions: $24.99 price, $8.00 unit cost delivered to FBA, 15% referral fee. You ordered 1,500 units for the window and the forecast was 1,200.

Scenario	Referral	Fulfillment	Landed cost	Margin per unit
Full price, non-peak	$3.75	$4.99	$16.74	$8.25
Full price, peak period	$3.75	$5.32	$17.07	$7.92
20% markdown ($19.99) in December	$3.00	$5.32	$16.32	$3.67

Clear the 300 extra units at the markdown before the cutoff and you make 300 x $3.67 = $1,101. Sell them at full price after January 14 and you make 300 x $8.25 = $2,475, less the storage they eat while they wait. That is a $1,374 gap before storage.

My view: do not discount a slow seller in late December just to get it out before the new year. If it will sell at full price in January, let it ship in January at $4.99. Run your own cubic feet against that $1,374 and the answer is usually obvious. The exception is anything heading into aged-inventory territory, where the long-term storage math wins.

The better fix is upstream. Size the Q4 reorder on landed cost at peak rates, with $5.32 in the fulfillment line for units you expect to ship before January 15, 2027 and $4.99 for the tail. The true landed cost walkthrough covers the other lines. A higher per-unit cost also moves your EOQ. Not by much. But Q4 is when a 300-unit error costs you real cash, and the Q4 checklist has the rest of the timeline.

Seeing the 300 Units Before You Order Them

The overbuy in that table starts as a reorder sized by gut. This is why we size suggested POs in ReplenishRadar from the forecast for each SKU, with Shopify and Amazon demand counted together, instead of last year's order plus a feeling. On Growth and above, the Inventory Health tab also totals Amazon's estimated monthly storage fee across your ASINs, so the cost of parking a surplus through December is a number on a screen, not a surprise on an invoice. Try ReplenishRadar free for 14 days ->

The 2026 peak period runs October 15 to January 14. Put $5.32, or your own tier's number, into this week's reorder sheet.

Related Reading:

• Amazon's New 3.5% FBA Surcharge: Per-Unit Math
• Q4 Inventory Planning Checklist
• Amazon FBA Fee Increases for 2026: What Changed
• How to Calculate True Landed Cost