Fee calculations are based on Amazon marketplace rates, category rules, product size, weight, and selected price. Fees are displayed in:
All fees shown in the profit breakdown contribute to Net Profit and ROI.
FBA Fulfillment Fee
The FBA Fee is calculated per unit and depends on:
Marketplace
Size tier (standard, oversized, bulky)
Weight
Hazmat status (if applicable)
Season (in the US, Germany, and UK marketplaces)
When available, Seller Assistant uses Amazon marketplace data.
If not available, the fee is calculated based on Amazon's official size and weight rate cards for the selected marketplace.
In the US, Germany, and UK marketplaces, the FBA Fee includes a peak-season surcharge for Oct 15 – Jan 14 each year by default (Auto); Season can also be fixed to Peak, applying the surcharge year-round, or to Standard, turning it off entirely.
Note
If product dimensions or weight are incorrect, the FBA fee and profit will be inaccurate.
Referral Fee
The Referral Fee is calculated as a percentage of the selling price. It depends on:
Product category
Marketplace
Entered price
When category-based referral percentages are available from Amazon, they are used.
If not available, the system applies marketplace category rate cards.
Note
Changing the selling price immediately recalculates the referral fee and profit.
Storage Fee (FBA)
Storage Fee is calculated based on:
Marketplace
Time of year (Jan–Sep vs Oct–Dec)
Size tier (standard or oversize)
Hazmat status (if applicable)
Product volume
Storage rates follow official Amazon storage rate cards per marketplace.
The same Season value also determines this fee's time of year, using its own Oct 1 – Dec 31 peak window – a different date range than the FBA Fulfillment Fee surcharge above. Set a storage period of 1 to 12 months and the fee blends the right rate for each month it covers, mixing peak and non-peak rates when the period spans both.
Note
Q4 storage rates are higher. Profit may change significantly during Oct–Dec.
Inbound Placement Service Fee
Inbound Placement Service Fee is displayed using the maximum rate for the product's size and weight category. It is based on:
Size tier
Weight range
Shipment split type
The system applies the maximum applicable rate for conservative profit estimation.
Note
Actual inbound placement fees may be lower depending on shipment configuration.
Variable Closing Fee
Variable Closing Fee applies only to specific media categories:
Books
DVDs
Music
Video Games
Software
It is a fixed per-unit amount depending on marketplace and category. If the product is not in one of these categories, this fee is not applied.
Digital Service Fee
Digital Service Fee is calculated as a percentage applied to:
Referral Fee
Variable Closing Fee
FBA Fee (in applicable marketplaces)
The exact application depends on the % you've provided and selected application scheme. This fee is calculated automatically and included in total Amazon fees.
VAT on Fees
Unlike the fees above, VAT on Fees isn't charged by Amazon. It only applies when your VAT scheme is set to VAT on Seller's Fees, and it is calculated as a percentage of:
Referral Fee
Variable Closing Fee
The percentage is your own VAT on Seller's Fees rate, separate from the VAT rate applied to your selling price or cost of goods.
Note
This fee only appears when VAT on Seller's Fees is your selected VAT scheme.
3PL Fee
3PL Fee estimates the cost of preparing and shipping your inventory to Amazon's fulfillment network – separate from the FBA Fulfillment Fee and the Inbound Placement Service Fee above. It depends on:
Shipping cost per pound (or kilogram), combined with the product's weight
A flat shipping cost per item
A general prep cost
A fragile-handling cost, if the product is fragile
A hazmat fee, if applicable
An oversize fee, if applicable
These are your own per-unit rates, applied automatically based on the product's weight and its hazmat, oversize, and fragile status. Like the fees above, 3PL Fee is included in total Amazon fees and reduces Net Profit and ROI.
Why Profit May Differ from Seller Central
Differences may occur due to:
Missing or incorrect product dimensions
Category mismatches
Seasonal storage rate changes
Marketplace-specific rules
Shipment configuration affecting inbound placement fees
Seller Assistant calculates fees based on the best available marketplace data and official rate cards at the time of analysis. If key product data changes, fees and profit are recalculated automatically.
In case of mismatches, you can enter FBA and Referral fee into the Price List Analyzer table view for accurate profit calculation.
