Keep Q4 deals profitable: run this fee-margin checklist before Oct 15
Before the peak window opens, test each SKU's margin, reprice only the ones that break, and leave the rest alone.
Your Q4 sheet has a new line: the peak fulfillment fee. You have a catalog and a holiday plan, but the fee change does not care about your margin. The question is narrow: which SKUs can absorb the peak charge, and which ones should not be promoted at all. A unit-level test protects the SKUs that can carry the fee.
Peak fees follow the ship date
Amazon's peak holiday fulfillment fees are active from October 15 through January 14, 2027. The charge follows the ship date, so units leaving fulfillment centers on or after October 15 incur the peak rate. The peak fees cover FBA, Remote Fulfillment with FBA, Multi-Channel Fulfillment, and Buy with Prime.
Keep separate buckets in the sheet: inventory already in fulfillment, inventory in transit, and inventory you plan to send later. The first bucket can still be moved before the start date, the second may already be exposed, and the third lets you choose a slower inbound pace. The buckets keep the ship-date question concrete: you need to know which units will be charged before you commit them to a promotion.
The fee-margin test runs in a single line
Start with landed cost: product, inbound freight, storage, referral, base fulfillment, and any other unit cost you already track. Put the fee line inside that number, because that is where the margin is decided. The 2026 peak fulfillment fee increase averages $0.32 per unit. The spread is wider: small-standard units add about $0.20, while bulky or oversize units add $1 to over $4. The 3.5% fuel and logistics surcharge that began in April applies on top of the holiday charges. The 2026 base FBA fee update adds an average of $0.08 to each unit sold.
If you already priced for the base increase, the peak fee is the new variable. Compare the new unit cost to your selling price. The test is quick because it uses numbers you already have. Contribution means price minus all variable costs, before fixed overhead. A SKU can look healthy at the base rate and still fail during the peak window.
Keep fixed overhead out of the test. Rent, software, and your own time are already paid or already allocated. They do not change when the fee changes. If a SKU covers its variable costs and still leaves a small surplus, it can stay in the promotion. If it does not, it is a loss.
The checklist keeps the decision small
Run this for every SKU you plan to promote. The list stays short because the choice is small. Each item is quick if your numbers sit in a single sheet.
- Add the peak surcharge to landed cost.
- Flag SKUs where that fee exceeds contribution.
- Reprice only flagged SKUs by the exact delta.
- Remove SKUs that still sit below your minimum margin.
- Check ship-date exposure for inventory leaving after the peak window opens.
Overcorrection happens at the reprice step. Sellers raise every price by the average fee, then watch healthy SKUs lose rank. The average serves as a planning number, not a unit truth. A compact item may barely feel the change. A large item may need a bigger move or no promotion at all.
Set a minimum margin before you start. If a SKU falls below it after the fee, do not spend time negotiating with the number. Pull it from the deal list. Saved hours become the real profit, because you are not managing a losing promotion through the busy season.
You do not need a team to run this. You need a single sheet, a cutoff, and the discipline to leave the catalog alone. The durable trick is to change only the unit cost line, then let the margin decide. Run the sheet, then stop.
