Amazon News Insight

Published July 27, 2026 / EC Designer Editorial

Amazon has announced an updated resource breaking down FBA fees and the built-in Seller Central tools designed to help sellers estimate costs before they eat into profits. If you've been guessing at your margins — or worse, discovering shrinkage only after the fact — this is a good moment to revisit how you're actually reading your numbers.

Understanding How Amazon Separates FBA Fulfillment Fees from Referral Fees

One of the clearest points in Amazon's updated guide is the distinction between referral fees and fulfillment fees — two costs that sellers sometimes blur together when doing back-of-envelope math, and that blurring can quietly destroy a product's profitability.

Referral fees are essentially Amazon's commission on the sale, calculated as a percentage of the total selling price and varying by category. Fulfillment fees, on the other hand, are what you pay FBA to pick, pack, and ship each unit — and they're driven primarily by the size and weight of your product. Storage fees layer on top of that, charged monthly (and at a higher rate during Q4).

Keeping these buckets separate matters because the levers you pull to fix each problem are completely different. If your referral fee is killing you, that's a category or pricing conversation. If your fulfillment fee is too high, the fix might be packaging redesign, bundling, or reconsidering whether FBA is the right channel for that particular SKU at all.

• Referral fees: Category-dependent percentage of sale price — check Amazon's fee schedule for your specific category
• FBA fulfillment fees: Based on product dimensions and weight — measured at the time of shipment
• Monthly storage fees: Charged per cubic foot; rates increase significantly October through December
• Long-term storage fees: Applied to inventory sitting in fulfillment centers beyond 365 days

How to Use the Revenue Calculator and Manage Inventory Fee Column for Real Product Decisions

Amazon's guide highlights two tools that every seller should be using regularly, not just when onboarding a new product: the FBA Revenue Calculator and the estimated fee column inside Manage Inventory.

The Revenue Calculator is accessible without logging in, which makes it useful for quick competitive research, but it's most powerful when you're stress-testing a new product idea. Plug in your expected selling price, your cost of goods, and your shipping-to-Amazon estimate, and it will surface the estimated FBA fees and net margin in real time. The key habit to build here is running the calculator at multiple price points — not just your target price — so you understand exactly where your break-even sits and how sensitive your margin is to a price drop or a fee increase.

The estimated fee column in Manage Inventory gives you a live, per-SKU view across your existing catalog. This is where things get actionable fast:

• Sort by estimated fee to find outliers — products with disproportionately high fulfillment costs relative to their selling price are candidates for repricing, repackaging, or removal
• Cross-reference with your sell-through rate — slow-moving, high-fee SKUs are a double hit: you're paying storage and fulfillment costs on units that aren't converting
• Flag any products approaching long-term storage thresholds — running a removal or liquidation before the 365-day mark is almost always cheaper than the fee itself
• Use the data before Q4, not during it — storage fees spike in October, so audit your inventory in August or September while you still have time to act

The broader takeaway from Amazon's updated resource is simple but easy to defer: per-unit economics need to be a standing agenda item, not a one-time onboarding exercise. Fee structures shift, your product dimensions can be remeasured, and category referral rates occasionally change. Sellers who build a habit of running these numbers quarterly — and especially before launching anything new — are the ones who catch margin erosion early rather than explaining it to their accountant at year-end.

Practical Steps to Audit Your FBA Cost Structure Right Now

You don't need a spreadsheet overhaul to get started. Here's a focused workflow that takes under an hour and gives you a clear picture of where your FBA economics actually stand:

• Pull the estimated fee column in Manage Inventory and export it to a spreadsheet
• Calculate fee-to-revenue ratio for each SKU (total fees ÷ selling price) — anything above 35–40% deserves a hard look
• Run your top 10 SKUs through the Revenue Calculator at their current prices to verify the numbers match your assumptions
• Check your product dimensions on file — incorrect measurements are a common source of inflated fulfillment fees, and you can request a remeasurement through Seller Central
• Review storage aging reports for any inventory at risk of long-term storage fees

Amazon's tools are genuinely useful here — the friction is mostly in remembering to use them consistently. Blocking 30 minutes a month to run through these checks is one of the higher-ROI habits an FBA seller can build.

FAQ

What's the difference between FBA fulfillment fees and referral fees on Amazon?

Referral fees are a percentage of your selling price that Amazon charges as its marketplace commission — the rate varies by product category. FBA fulfillment fees are separate charges covering the cost of picking, packing, and shipping each unit from Amazon's fulfillment centers, and they're calculated based on your product's size and weight. Understanding which fee is hurting your margin tells you which problem to fix.

How do I use the Amazon Revenue Calculator to check if a product is worth selling via FBA?

Go to the FBA Revenue Calculator (available on Amazon's seller resources site), enter the ASIN or product details, your expected selling price, your cost of goods, and your estimated inbound shipping cost. The calculator will show estimated FBA fees and projected net margin. It's best practice to test multiple price points so you know exactly where break-even falls and how much pricing flexibility you actually have.