09/15/2026
Amazon Q4 Alert: Fulfillment Windows Closing & New B2B Metric
Your late-October FBA replenishment plan needs a rewrite. Amazon fulfillment centers are shifting capacity to outbound orders by November, so inbound receiving will severely tighten.
Critical FBA Deadlines:
Sept 16: Amazon-optimized splits for Prime Big Deal Days.
Oct 14: AWD deadline for Black Friday/Cyber Monday.
Oct 21: Minimal shipment splits for BFCM.
Oct 28: Amazon-optimized splits for BFCM.
(Pro Tip: Amazon extended Prime Big Deal Days sourcing to Sept 22. Use it to clear aged inventory.)
The New B2B Rule (Effective Sept 30):
Amazon is enforcing a 90% Business Hour Delivery Rate (BHDR) for seller-fulfilled (FBM) B2B orders.
It is measured on a rolling 14-day window.
Fall below 90%? You get a warning. Fail to fix it by October 30, and your FBM offers to Amazon Business buyers will be deactivated.
Carrier selection and transit times now dictate your B2B channel eligibility. Check your Account Health dashboard today.