Amazon Starts Enforcing a 90% Business Hour Delivery Rate on September 30. FBM Sellers Have Three Weeks.

Starting September 30, professional sellers need a Business Hour Delivery Rate of 90% or higher on seller-fulfilled orders to Amazon Business customers. Fall below it and Amazon flags the account. Stay below it on October 30 and your seller-fulfilled offers can be deactivated for Amazon Business buyers entirely. Amazon confirmed the change on July 13, 2026, covering the US, UK, and Germany at launch.

The recommendation, up front: pull your Business Hour Delivery Rate by SKU and by carrier this week. Any SKU between 85% and 92% will not survive Q4 carrier congestion. For those, either re-route the B2B orders to a carrier with business-hour delivery windows or move the ASIN to FBA before September 30. Do not wait for the flag, because the flag arrives at the end of the month and the deactivation lands thirty days after that, in the middle of your best selling weeks.

What the metric actually measures

This is the part sellers keep getting wrong. Business Hour Delivery Rate is not on-time delivery. On-time delivery asks whether the package arrived by the promised date. BHDR asks whether it arrived while the buyer’s business was open.

A package that shows up at a closed warehouse at 6:40pm on Friday is on time and fails BHDR. A Saturday delivery to a company that runs Monday to Friday is on time and fails BHDR. Amazon measures it on a rolling 14-day window, so a bad week does not average out over a quarter the way most seller metrics do.

FBA offers are unaffected. Standard retail offers to consumer buyers are unaffected. The exposure is narrow and specific: seller-fulfilled inventory sold to Amazon Business accounts.

Why this is harder than it looks

You do not control when UPS, FedEx, or USPS attempts a delivery. You control when the package leaves your building. Amazon just attached account-level consequences to a metric that lives mostly in the carrier’s hands.

That is a real structural problem, not a complaint. The last-mile driver decides the stop sequence. Residential-optimized routes commonly run into the evening because that is when consumers are home, and B2B addresses inside a mixed route inherit that timing. If your B2B orders are riding the same commercial ground service as your consumer orders, you are relying on luck to clear 90%.

Q4 makes it worse in both directions. Carrier networks slow down and delivery windows spread out, while Amazon Business order volume climbs as commercial buyers spend down annual budgets. Your denominator grows at exactly the moment your success rate drops.

What Amazon gets out of it

Look at where this pushes volume. Every SKU that cannot clear 90% via FBM has one clean path to compliance, and that path is FBA. Amazon Business is one of the fastest-growing segments inside Amazon, and the sellers most likely to be running FBM on B2B SKUs are the ones who chose FBM precisely to protect margin on slower-turning, heavier, or higher-priced items. Those are expensive items to send into FBA.

So the honest framing is that this is a fulfillment migration incentive wearing a performance-metric costume. That does not make it wrong or avoidable. It does mean you should price the decision as a channel economics question rather than a compliance chore.

The three-week plan

Week one: measure and segment. Pull BHDR in Seller Central and break it out by SKU, by carrier, and by destination region. You are looking for two things. First, the SKUs already under 90%. Second, the SKUs between 85% and 92%, which are the ones that will fail in November and which nobody is watching. Also pull what share of each SKU’s revenue comes from Amazon Business, because that number sets the size of the loss if the offer goes dark.

Week two: fix what carriers can fix. Split B2C and B2B into separate fulfillment queues if you are running one pipeline today. Route Amazon Business orders to services with business-hour delivery commitments, which usually means regional carriers, LTL for the heavier items, or a dedicated commercial ground tier rather than the cheapest available rate. Then pull your order cutoff time forward by a day on B2B orders. Shipping one day earlier is the cheapest lever you have, and it is the one you fully control.

Week three: move what carriers cannot fix. For any ASIN where the math says you cannot realistically hold 90% at holiday volume, swap it to FBA before September 30 and absorb the fee difference. Run the comparison honestly: FBA fees on that SKU against the full Amazon Business contribution you lose if the offer is deactivated on October 30. On a mature FBM catalog, B2B can be a meaningful share of revenue, and losing it quietly is usually more expensive than the fee delta.

If your Amazon Business share on a given SKU is negligible, the correct answer may be to do nothing and accept the deactivation on that ASIN. That is a legitimate call. Make it deliberately, with the number in front of you, rather than by omission.

For international brands selling into the US

Two additional notes if you are running FBM into the US from outside it.

Your delivery timing is set by whichever domestic carrier picks up the final leg, and you likely have less visibility into that handoff than a domestic seller does. Ask your 3PL or freight forwarder directly which last-mile service is carrying your Amazon Business orders and whether it offers a business-hours delivery commitment. Many do not, and most will not volunteer it.

Second, US Amazon Business is a genuinely large B2B channel with institutional buyers, and offers there are worth defending rather than abandoning. If BHDR is the constraint that forces you to reconsider a US fulfillment footprint, that is not purely a cost event. Getting inventory closer to commercial buyers fixes this metric and several others at the same time.

The short version

Amazon converted an informational metric into an enforced one with a 25-day runway and a deactivation date that lands in Q4. The metric is carrier-dependent, measured on a rolling 14-day window, and applies only to seller-fulfilled orders sold to Amazon Business accounts.

Pull the numbers this week. Fix routing and cutoffs where carriers allow it. Move the SKUs where they do not. The sellers who get hurt here are the ones who see the September 30 flag, assume they have until October 30 to react, and then discover that a 14-day rolling metric cannot be repaired in the same two weeks the holiday freight surge starts.

If you want your FBM delivery performance, Amazon Business exposure, and FBA swap economics reviewed before the September 30 date, book a strategy assessment and we will go through the account with you.