Amazon is reassigning some products to different fee categories, and the change takes effect on October 31, 2026, according to seller-tool provider Novadata, which cites Amazon's Seller Central guidance. If one of your ASINs moves to a category with a higher referral fee, your profit on every sale of that item can drop, even though nothing about the listing looks different. Here is what is changing, who is affected and what to check today.
What Is Changing
Every product on Amazon has a fee category. This is the category Amazon uses to calculate selling fees, and it is not always the same as the category shoppers see when they browse. Each ASIN can only have one fee category.
According to the report, Amazon is moving some ASINs into different fee categories. Once the change is live, fees on those products are calculated using the new category. Amazon is notifying affected sellers, but the report does not say how many ASINs are involved or which categories are changing.
Which Fees Can Change
The most obvious one is the referral fee, which is a percentage of the sale price and varies by fee category. The same report notes, citing analysis from beBOLD Digital, that other fees may also depend on the fee category, including:
- Closing fees
- FBA fulfillment fees
- FBA returns processing fees
This matters for both FBA and merchant-fulfilled sellers. Even if you ship orders yourself, you still pay referral fees, so your ASINs can be affected.
Why a Small Change Can Hurt Your Margin
Here is a simple example using made-up numbers, just to show the math. Say you sell an item for $30. If its referral rate moves from 10% to 15%, you pay $1.50 more on every unit. If your profit was $5.00 per unit before, it drops to $3.50. That is a 30% cut in profit from one setting you never touched.
Across hundreds of units a month, that adds up quickly. That's why this is worth 20 minutes of your time today.
What to Do Right Now
1. Open the Fee Preview report
In Seller Central, download the Fee Preview report. It shows the current and upcoming fee category for each of your ASINs, so you can see which ones are moving.
2. Sort by impact
For every ASIN that is changing, compare the old and new referral rate and multiply the difference by your monthly units. Start with the products where the dollar impact is biggest.
3. Re-check your profit
Run your top products through a profit calculator with the new fees. You can use our free Profit & ROI Calculator to see your new margin and break-even price in seconds.
4. Dispute anything that looks wrong
If you believe an ASIN has been placed in the wrong fee category, Amazon has a process to dispute it. The report advises filing before October 31 and including the ASIN, the current and new categories, the product details and the part of Amazon's fee category guidelines that supports your case.
5. Adjust price or ads if needed
If the new fee is correct and your margin is now too thin, you have a few options: raise the price slightly, cut ad spend on that ASIN, lower your product cost with your supplier, or bundle it with another item to raise the order value.
Who Should Pay the Most Attention
- Sellers with low-margin products. A few percentage points can wipe out profit.
- Sellers with products that sit between two categories. These are the most likely to be reassigned.
- High-volume sellers. Small per-unit changes become large monthly totals.
- Sellers who use repricers. Make sure your minimum price rules reflect the new fees, so the repricer doesn't sell below cost.
Common Mistakes to Avoid
- Assuming nothing changed because the listing looks the same. The fee category is separate from the browse category.
- Only checking your best seller. Check every ASIN in the report.
- Waiting for your next monthly statement. By then you may have sold hundreds of units at the new fee.
- Relying on old fee tables. Always use the current fee pages in Seller Central.
The Bigger Picture
Fee changes are a normal part of selling on any marketplace, but they are easy to miss when they happen quietly at the product level. Sellers who check their numbers regularly are the ones who protect their margins. Make reviewing the Fee Preview report part of your monthly routine, not just something you do when there's news.
FAQ
Will Amazon tell me if my ASINs are affected?
According to the report, Amazon is notifying affected sellers. Still, check the Fee Preview report yourself rather than waiting for a message.
Does this affect FBM sellers?
Yes. Merchant-fulfilled products still pay referral fees, which depend on the fee category.
Can I change my product's fee category myself?
Not directly. If you think a category is wrong, use Amazon's dispute process and provide supporting details.
Final Thoughts
This is a quick check that can save you real money. Pull your Fee Preview report today, find the ASINs that are moving, re-run your numbers and dispute anything that looks wrong. A few minutes now beats discovering a margin problem weeks later.
Sources: Novadata: Amazon fee category changes on October 31. Always confirm details in your own Amazon Seller Central account.
Written by Kausar Ali Hazoori, e-commerce operator and CEO of Grow My Income LLC.
