Amazon Fee Category Changes October 31, 2026: Check Your ASINs Now

Amazon is reassigning ASINs to new fee categories on October 31, 2026. If one of your products moves from an 8% referral bracket into a 15% one, your referral fee jumps 7 points of the sale price — and it happens mid-Q4, with no change to your price, your cost, or your listing.

This is not a published fee-schedule increase. It is a reclassification, and it does not come with the 90-day notice Amazon gives for announced fee changes. Affected sellers are being notified in Seller Central, but the notices are inconsistent: some name the affected ASINs with estimated current and future fees, others name none at all.

Here is exactly what is changing, how to check your own catalogue in under ten minutes, and how to dispute a wrong classification before the charges start.

What is actually changing on October 31, 2026

Every ASIN on Amazon carries two separate classifications, and most sellers only ever look at one of them:

• The browse category — what shoppers see when they navigate the store.
• The fee category — what determines your referral fee rate.

These are not the same thing. Amazon states plainly that a product's fee category "may not be the same as the category shown to customers." An ASIN can sit in Electronics for shoppers and bill as Electronics Accessories for you.

Each ASIN has exactly one fee category, even when it appears in several places across the store. Amazon's system assigns it based on product attributes and functionality, and Amazon audits ASINs continuously against its fee category guidelines. The October 31 event is one of those audits landing at scale.

Which fees are affected

Referral fees are the headline, but the fee category can drive more than that:

• Referral fees — the big one, and the one that varies most between categories
• Closing fees — relevant for media categories
• FBA fulfillment fees
• FBA returns processing fees

One point that catches sellers out: this is not an FBA-only problem. FBM sellers pay referral fees too, so merchant-fulfilled ASINs are fully in scope.

What a category move actually costs you

Reclassification sounds administrative. It is not — it comes straight out of contribution margin. Work a real example.

A $30 product moving from a 10% referral bracket to 15%:

• Referral fee at 10%: $3.00
• Referral fee at 15%: $4.50
• Extra cost: $1.50 per unit
• On 800 November units: $1,200 in additional fees

If that product was netting $5.00 per unit, it now nets $3.50. That is a 30% cut to your profit with no change to price or cost.

The real-world cases are worse. A documented 2026 forum case involved USB Wi-Fi network adapters charged 15% under Electronics Accessories (15% on the first $100, 8% above it) when the seller argued Computers applied at 8% — Amazon's own Computers definition lists networking devices. On a $40 adapter, that 7-point gap is $2.80 per unit. On a product running a 12% net margin, a 7-point referral swing wipes out well over half the profit.

The PPC consequence nobody budgets for

This is where most sellers get hurt twice. Your break-even ACoS is a function of your margin. When the referral fee rises, your break-even ACoS falls — and every campaign you left running at the old target is now quietly unprofitable.

Using the $30 example above: at $5.00 net the product supports a meaningfully higher ad spend per sale than it does at $3.50. If your campaigns are targeting an ACoS set against the old margin, you are now buying sales below cost through the single highest-volume month of the year.

Recalculate break-even ACoS for every reassigned ASIN before Black Friday, not after.

How to check your ASINs in 10 minutes

Do not wait for an email. Audit the catalogue yourself.

1. Open the Fee Preview report in Seller Central. Amazon built this report specifically to show each ASIN's current fee category and any upcoming category change. This is the authoritative view.
2. Cross-check in the Revenue Calculator. It shows the fee category and current fees per ASIN — useful for confirming what Fee Preview tells you.
3. Search your Seller Central notifications and email for advance notices. Some list affected ASINs with estimated current and future fees.
4. For each flagged ASIN, compare: current category vs. October 31 category, per-unit referral fee before and after, per-unit contribution margin after the change, advertising break-even after the change, and any Q4 price or promotion already locked in.
5. Sort by dollar impact, not unit volume. A low-volume, high-ticket ASIN moving brackets can cost more than a high-volume cheap one. Rank by fee delta × forecast Q4 units.

Then set up the ongoing check: track referral fee per unit on every SKU as a standing metric. When you monitor it monthly, a reclassification shows up as an obvious step change instead of a mystery margin leak you find in January.

How to dispute a wrong fee category

Amazon's classification is automated, which means it is sometimes wrong. There is a process — and critically, there are two separate levers that sellers constantly confuse:

You usually need both. Fixing the classification does not automatically refund what you have already paid.

What to include in the submission

• The ASIN
• Its current fee category and the category you believe is correct
• The product attributes that support your position
• The specific wording from Amazon's own fee category guidelines that backs you — this is the part that wins cases; quote Amazon's category definition back to Amazon
• For charge disputes: transaction dates, amounts charged, and the fee you believe should have applied, verified against the Selling on Amazon Fee Schedule via the Reports Repository

Two constraints to plan around: one claim per charge, and Amazon's appeal decision is final. You get one properly-built submission, so build it properly the first time. You can also explicitly request a re-review by the catalogue classification team.

Why the deadline matters

File before October 31. Once the new category takes effect, every order bills at the new rate while your dispute sits in a queue — and you are disputing them one charge at a time. Through November and December, that is potentially thousands of transactions at the wrong rate. Fixing it in advance costs one submission; fixing it afterwards costs a reconciliation project.

Your action list before October 31

1. Pull the Fee Preview report and export it.
2. Flag every ASIN with a scheduled category change.
3. Calculate fee delta × forecast Q4 units for each, and rank by dollar impact.
4. For the top ASINs, recalculate contribution margin and break-even ACoS.
5. Adjust PPC targets and bids on affected ASINs — before BFCM traffic arrives.
6. Re-check any locked Q4 promotions and deal pricing that assumed the old fee.
7. For anything you believe is misclassified, file the dispute and the re-review request now.
8. Add referral fee per unit to your standing monthly metric review.

The bottom line

A fee category reassignment is the quietest way to lose Q4 margin. There is no listing change, no suppressed ASIN, no alert in your dashboard — just a smaller number in your settlement report, arriving in the month when your volume is highest and your attention is elsewhere.

Ten minutes in Fee Preview this week is the cheapest margin protection available to you before Black Friday.

Related reading

• Amazon FBA Peak Fulfillment Fees 2026 — the other Q4 cost increase hitting the same ASINs
• Missed Amazon's Black Friday Deal Deadline? 9 Moves That Still Work
• Amazon PPC Audit Guide: Find and Fix Wasted Spend
• 6 New Amazon Policies Hitting US Sellers in October 2026

Managing Amazon PPC across US, UK and UAE accounts? Fee reclassification changes your break-even ACoS, which means your campaign targets need to move with it. Get in touch for a PPC and margin audit before peak season.