Q4 2026: peak storage from 1 Oct, peak fulfillment 15 Oct–14 Jan — two clocks

Inbound deadlines Amazon named (confirm live)

Those are arrival-at-FC dates Amazon posted for Prime-badge eligibility around Holiday 2026 events. They move. If inbound will miss, pause ranking campaigns on those ASINs now — ads into OOS is wasted spend.

PPC implication

Contribution moves twice. Recalculate the bid ceiling when storage steps up (1 Oct snapshot), then again when fulfillment surcharge lands (15 Oct). Peak volume does not rescue a SKU that was already underwater in September. Discovery stays on a leash. Exact on converters that still clear the new fee stack, with daily budgets that last through evening hours.

Source: Amazon US Seller Forums, “Holiday 2026: Same fees, same eligibility, earlier deadlines.” Confirm live rates and inbound dates in Seller Central.

Why two clocks matter more than “holiday fees”

Founders hear “Q4 fees” and wait for one date. Amazon’s Holiday 2026 Seller Forums post split the problem: peak fulfillment (a per-unit step from 15 October 2026 through 14 January 2027, same window as last year, about $0.32 per unit over non-peak in Amazon’s comparison, with the fuel surcharge on top) versus peak storage (elevated monthly storage in October, November, and December). Units sitting in FCs for the October snapshot pay storage whether or not they sell in the fulfillment-surcharge window. Drawdown is a September job. Bid ceilings are a September job. 15 October is when the second clock starts, not when you start thinking.

How to confirm inbound and fees

Read the live Holiday 2026 Seller Forums post and the inbound help page the week you book freight — Amazon has moved eligibility dates before. Fee Preview with a peak-fulfillment buffer on anything you will still sell after 15 Oct. Inventory age and days of supply by FNSKU so you are not paying aged + peak storage + ads into a dead child. Deal/event calendars for Prime Big Deal Days 6–7 Oct and Black Friday / Cyber Monday 27 / 30 Nov sit on top of those clocks, they do not replace them.

What a September week looks like on this desk

1. Hero list. Fee Preview. New break-even ACOS with surcharge + peak-fulfillment buffer.
2. Inbound ETA vs the AWD / minimal / optimized dates Amazon posted for PBDD and BF. Miss = pause ranking on that ASIN.
3. Remove or restock units that will still be in FCs for the October storage snapshot if they cannot earn the elevated rate.
4. Event campaigns isolated. Evergreen harvest still weekly. Discovery on a leash.
5. Founder log: old ceiling, new ceiling, which ASINs lost ranking.

Related: Q4 2026 calendar, bid-ceiling SOP, Prime Big Deal Days.