Inputs to review
- Amazon listing price, category clues, and visible product details
- Referral, fulfillment, and per-unit seller-plan assumptions
- Packaged dimensions and shipping weight, when available
- Seller-fulfilled shipping, labor, storage, and other applicable costs
What the estimate shows
- Estimated referral fee and supported FBA fulfillment amount
- Separate per-unit subscription allocation and other entered costs
- Full unit economics, including profit and break-even context
- Fee-input confidence and diagnostics when details need verification
Which Amazon fee lines the audit estimates
Amazon's official pricing resources distinguish selling-plan and referral fees and provide tools to preview FBA or seller-fulfilled costs. Margin Seller shows fee assumptions inside a broader product audit: a category-based referral estimate and an FBA fulfillment estimate when available, alongside seller-entered per-unit plan and other charge inputs.
The page is not a stand-alone Amazon quote tool. Package measurements, category assumptions, fulfillment method, and optional fee inputs can change the estimate; unsupported or missing fee-driving information should be verified rather than treated as zero.
- Check the exact product variation, category, and packed dimensions before relying on a fee estimate.
- Use your own per-unit allocation for a selling-plan subscription or any applicable optional charge.
Keep fee estimates separate from all-in profit
Marketplace charges are only part of unit economics. Supplier cost, inbound shipping, storage time, advertising, discounts, and returns are separate seller costs that can be included to see whether the product may meet your target.
For seller fulfillment, enter the shipping, packaging, labor, and storage costs of your own operation. Compare the result with Amazon's current Revenue Calculator or fee reports for the same product and method before buying; Margin Seller does not fetch live Seller Central fee data.
Amazon FBA fee calculator tips
Enter the packed dimensions and weight, not the bare product, and confirm which size tier those measurements fall into, since the tier sets the FBA fulfillment fee.
Then add storage time and a return allowance so the estimate reflects what the unit costs while it waits to sell.
Separate estimated marketplace fees from operating costs
For a fee review, label each line as a marketplace charge, seller-plan allocation, or operating cost. Margin Seller uses a category-based referral assumption and a supported FBA fulfillment estimate; seller-plan allocation and optional per-unit charges are entered by you rather than retrieved from Seller Central.
Compare the same product, variation, and fulfillment method with Amazon’s current Revenue Calculator or fee records. If category, package measurements, or a fee amount is uncertain, verify it and keep the audit at Review instead of interpreting missing fee information as zero.
- Treat supplier cost, inbound shipping, advertising, and returns as separate seller expenses.
- Enter a per-unit subscription allocation only when it applies to your selling plan and sales volume.
- Use current Amazon seller tools for account-specific charges before placing an order.
Common questions
Frequently asked questions
Does this show live Amazon fees?
No. It uses visible supported listing details and editable planning assumptions. It does not connect to Seller Central or return an official, live Amazon fee quote.
Does the estimate include my selling-plan subscription?
You can enter a per-unit allocation for the seller plan. The app does not retrieve your subscription or divide it by your actual sales volume automatically.
Is this different from an Amazon profit calculator?
The fee inputs appear within a broader product audit that also includes sourcing and operating costs. Use Amazon's official Revenue Calculator or seller records to verify current, item-specific charges.
What fees does Amazon charge sellers?
A referral fee per sale, FBA fulfillment and storage fees if you use FBA, and subscription fees depending on the plan.
Ready to check a listing?
Put the assumptions to work.
Bring the visible listing facts and your own costs into a product audit before you commit to inventory.