I've got a product that's in the Home and Kitchen category(Home Improvement›Safety & Security›Safes & Safe Accessories), priced under $13, and the dimensions are around 8 x 8 x 4.6 cm, unit weighing 40g, dimensional weight: 70g. Nothing out of the ordinary.

Looking at the official 2026 FBA fee schedule, this should clearly fall under the Large Envelope tier – it's well within the size and weight limits. And because it's under $13 and in Home and Kitchen, it should qualify for the Low-Price rate of **$3.72**.

But here's the thing – Amazon is charging me $5.87 instead, which is the "All other fee categories" rate.

I opened a case, they remeasured the product (confirmed the same dimensions), and reimbursed me for past orders.

Then i replied the case said that I need to correct the FBA fee tier classification,

but then they said the $5.87 rate is correct going forward. That's where I got confused.

I went back to the fee schedule and double-checked – $3.72 is right there for Large Envelope, under $13, Home and Kitchen. I'm not sure why my product isn't getting that rate.

What bothers me more is this, this is actually a pretty serious bug in the system. As sellers, we rely on the fee schedule to calculate our profit margins before we even list a product, especially for low-value items where every dollar counts. If the system can randomly apply a higher tier than what the official schedule says, how are we supposed to plan ahead? You upload a product thinking you know exactly what you'll be charged, and then you find out later it's completely wrong. That makes it impossible to accurately forecast profits, and for low-margin products, that difference can literally make or break the decision to even sell that item.

But since they've confirmed twice that the fee is correct, so I wondering that anyone could help me figure out the problem?

Thanks