The New Business Hour Delivery Rule That Can Turn Off Your FBM Listings
What the Business Hour Delivery Rate Actually Measures
Amazon is introducing a new performance metric specifically for seller-fulfilled orders placed by Amazon Business customers. The Business Hour Delivery Rate tracks the percentage of seller-fulfilled shipments delivered within the operating hours the business buyer has on file, calculated over a rolling 14-day period. This is a narrower and more specific standard than a general on-time delivery metric. A package that arrives on the correct day but after the buyer's business has closed for the day counts against this metric, even though it might look fine under standard delivery timing measures.
The Enforcement Timeline
The requirement takes effect September 30, 2026 in the US, UK, and Germany. Sellers whose Business Hour Delivery Rate falls below 90% on that date receive a notification from Amazon along with recommendations for improvement. If the rate is still below 90% by October 30, roughly a month later, the seller's seller-fulfilled offers are deactivated specifically for Amazon Business customers. Retail customers and FBA offers are not affected by this deactivation. This is a targeted enforcement mechanism aimed squarely at the FBM side of the Amazon Business channel.
Why This Metric Catches Sellers Off Guard
Most sellers running FBM operations track a general on-time delivery rate as part of their overall account health, but that metric does not account for a buyer's specific business hours. A shipment carrier delivering at 6:30pm to a business that closes at 5pm would typically still count as "on time" under a standard delivery window measure, but it fails this new, more specific standard. Sellers who assume their solid general delivery performance means they are safe under this new metric may be wrong, and will not know it until they check this specific number in Seller Central.
Why Amazon Business Customers Specifically
Amazon has been investing heavily in its B2B offering, including hosting its fifth annual Amazon Business conference for procurement and operations leaders this fall. Reliable delivery within a business's actual operating hours is a basic expectation for B2B buyers in a way it is not always for individual consumers, since a package left at an empty office after hours creates a real operational problem for the buyer. This metric is Amazon enforcing a service standard that matters specifically to the customer segment it is trying to grow.
What to Do Before September 30
Pull your current Business Hour Delivery Rate in Seller Central now if the report is available to you, rather than waiting for the enforcement date to arrive. If your rate is already below 90%, you have roughly two months to improve it before the October 30 deactivation deadline, which is enough time to make real operational changes if you start now and not enough time if you wait until the September notification arrives.
For sellers whose carriers or internal fulfillment process cannot reliably guarantee delivery within a buyer's business hours, the practical options are limited. Moving the affected SKUs to FBA removes the issue entirely, since FBA is not subject to this metric. Working with a 3PL that can commit to business-hour delivery windows is another path, though it requires vetting the 3PL's actual track record rather than taking a sales pitch at face value. For sellers where neither option makes sense economically, it may be worth deciding now whether continuing to sell those specific SKUs into the Amazon Business channel is still worthwhile once this requirement takes effect.
Getting Ahead of a Metric Most Sellers Have Not Checked Yet
Because this requirement is new and narrowly scoped, it is easy for it to slip past sellers who are focused on more visible account health metrics. An Amazon fulfillment partner that is already tracking this metric across a seller's B2B-facing SKUs, and can recommend the right fulfillment channel for each one before the September 30 deadline, is in a much stronger position than a seller finding out about this requirement for the first time in an Amazon notification.
