Amazon Business Hour Delivery Rate: 14 Day Window

The amazon business hour delivery rate is a new account health metric for seller-fulfilled orders, it runs on a rolling 14 day window, and it starts counting on September 30, 2026. It measures the share of your seller-fulfilled shipments to Amazon Business customers that arrive inside the buyer operating hours. The bar is 90%. If you are still under it on October 30, Amazon may deactivate your seller-fulfilled offers for Amazon Business customers.

Put those two dates next to your Q4 calendar. October 30 falls the week before Black Friday.

What the business hour delivery rate measures

Three filters, and a shipment has to pass all three to count:

• It is seller-fulfilled. FBA units are excluded.
• The buyer is an Amazon Business customer. Retail orders are excluded.
• The delivery landed inside that buyer operating hours.

The third one is new ground. Until now nothing on the seller side measured it. A parcel delivered at 7pm on a Friday to a company that closes at 5pm is on time by every metric you already track, and it fails this one.

Amazon shows the rate in the Eligibilities section of the Account Health dashboard. Read your number there before you model anything, because a rate you have never looked at is not a rate you can plan around.

Why a rolling 14 day window changes the arithmetic

A 14 day window behaves nothing like a 90 day one.

On a long window, a bad week gets diluted. You see the dip, you change carrier or cut-off, and you recover inside the same measurement period. On 14 days, a bad week is half the sample. One carrier delay, one buyer closed for a public holiday, one weekend of after-hours drops, and you are under 90% with no room left to average your way back.

The timing is the uncomfortable part. The fortnight that decides your October 30 status is the fortnight that ends on October 30. If you are reading this in the second half of September, you are already inside the run-up to it, and Q4 carrier networks are about to get slower, not faster.

Which stores the requirement covers

The Amazon announcement for seller-fulfilled shipments scopes the metric to Amazon Business customers in the US store. The SP-API changelog for EU FBM requirements lists the same pair of dates, September 30 to start measuring and October 30 to enforce, for the United Kingdom alongside Germany, France, Italy and Spain.

The two scopes do not line up exactly. The honest answer is to check your own Account Health page per marketplace rather than assume either one covers you. Independent coverage of the rollout reads it as a wider deployment than a single store.

Is your B2B delivery on time every hour?

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It is not arriving alone

The same SP-API changelog carries two seller-fulfilled changes that already landed:

• On-time delivery rate of 90% or higher, in force since July 15, 2026 in Germany, France, Italy and Spain, with enforcement from September 1, 2026. Listings may be deactivated below the bar.
• Default handling time at account level capped at zero or one day. The two-day default is gone. From September 1, 2026 Amazon also shortens a stated handling time automatically when it runs longer than your actual performance.

Put them side by side and the direction is not subtle. Amazon is closing the gap between the promise on the offer and the delivery behind it, and it is enforcing that gap per offer rather than per account. The Prime version of the same move happened in July, when SFP raised its delivery speed thresholds.

What to look at before September 30

Four checks, in the order that answers the question fastest:

1. Your current rate in Account Health, Eligibilities. Above 95% you have slack. Between 90 and 95 you do not.
2. Your delivery timestamps on Amazon Business orders for the last 30 days, read against a normal 9 to 5. That tells you whether the problem is the carrier or your own cut-off.
3. Your cut-off time. Moving it two hours earlier often moves a next-day delivery from late afternoon to mid morning, which is the whole game here.
4. Your carrier mix for B2B. Business-hours delivery windows exist on regional and dedicated B2B routes. Consumer parcel networks optimise for evenings and weekends, which is exactly wrong for this metric.

If you ship your own parcels in Q4, price any change against the Amazon Shipping demand surcharge and against the FBA holiday peak fees. Switching service level for two months has a cost you can calculate in advance. A deactivated offer does not.

The principle underneath the date

The unit of enforcement keeps shrinking.

It used to be the account, measured over a quarter, with warnings before anything happened. It is becoming the offer, measured over a fortnight, with a notification and thirty days. A promise you keep 89% of the time across fourteen days used to be something you fixed next quarter. Now it is a deactivated offer on the side of the marketplace where your B2B revenue lives.

That is worth planning for beyond this one metric. Whatever Amazon measures next will probably be measured the same way: narrow window, offer level, short notice. The answer is not to chase each metric as it lands. It is to know your actual delivery distribution rather than your average, because short windows punish variance and averages hide it.

#FBM#Amazon Business#account health#Q4

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