Amazon Vendor Overages: What Every Vendor Needs to Know Before October 1, 2026

Amazon is changing the way it handles Overages for Vendor Central suppliers from October 1, 2026.

Overages have always been an operational issue for Amazon Vendors. The difference is that errors which could previously be investigated and disputed may now become a direct cost to the business.

For brands selling at scale through Amazon Vendor, this is another reminder that profitability is determined not only by what you sell, but by how accurately the operation behind it is managed.

What are Amazon Overages?

An Overage occurs when Amazon receives and pays for more units than were originally confirmed against a Purchase Order.

Historically, many of these situations could be investigated and disputed. From October 1, that will no longer be the case for most suppliers.

That means an operational discrepancy that may previously have been recoverable can instead become a direct loss of margin.

Why the change matters

One Overage may appear relatively insignificant.

Across hundreds or thousands of Purchase Orders, however, small discrepancies can accumulate into a much more significant commercial problem.

The wider issue is the increasing responsibility being placed on Vendors to ensure that Purchase Orders, confirmations, Advance Shipping Notices and invoices align accurately.

Finance, e-commerce, operations and supply chain are becoming increasingly connected. A small process failure in one area can ultimately have a measurable effect on Amazon profitability.

For businesses managing large catalogs, high shipment volumes or multiple Amazon marketplaces, the cost of getting those processes wrong is increasing.

Which Amazon Vendors should pay particular attention?

The change is likely to be particularly relevant if your business:

• operates through Amazon Vendor Central

• ships high volumes of Purchase Orders

• regularly amends confirmed quantities

• manages a broad product catalog

• sells across multiple Amazon marketplaces

• has previously experienced deductions or reconciliation issues

The greater the operational complexity, the more important it becomes to understand where discrepancies are occurring and how they are being managed.

Five questions worth asking before October 1

1. Do we understand our current exposure to Overages?

Knowing whether Overages are an occasional exception or a recurring issue is the first step.

2. Who is responsible for confirming Purchase Orders, and how are exceptions managed?

Responsibility needs to be clear, particularly where confirmed quantities subsequently change.

3. Are Advance Shipping Notices consistently aligned with what is physically dispatched?

Differences between the data Amazon receives and the goods it receives can quickly become a commercial issue.

4. How quickly are discrepancies identified and investigated?

The earlier an issue is visible, the greater the opportunity to understand its cause and prevent it happening again.

5. Have we assessed the financial impact these changes could have after October 1?

Historic Overages data can help indicate where the business may be exposed once the new approach takes effect.

Overages are part of a wider profitability picture

Overages are only one example of a broader shift in the way Amazon Vendor operations need to be managed.

Across deductions, compliance programs, invoice reconciliation and operational chargebacks, we’re seeing greater pressure on finance and e-commerce teams to identify issues earlier and maintain greater operational accuracy.

For many brands, protecting Amazon profitability is becoming just as important as driving Amazon sales growth.

That means looking beyond individual disputes or deductions and understanding why they are happening in the first place.

Understand where Amazon profitability is being lost

RT7 Digital works exclusively with Amazon Vendor brands, helping finance and e-commerce teams identify where profit is being lost after the sale, recover missed revenue where possible, and improve the operational processes that protect margin over the longer term.

If you’re concerned about your exposure to Overages ahead of October 1, or want a broader view of where profitability may be leaking from your Amazon operation, get in touch with RT7 Digital.

We can look at what is happening within your account and help identify where it may be worth focusing first.