What Are Amazon FBA Fees? What Sellers Need to Know

For cross-border sellers, choosing Fulfillment by Amazon (FBA) provides a logistics solution that leverages Amazon’s fulfillment infrastructure to facilitate faster delivery, access to Prime customers, and business expansion without requiring sellers to manage individual orders. However, alongside these operational benefits, sellers must also account for the associated costs to maintain effective cost control and protect product profitability.

Amazon FBA fees encompass costs associated with inventory storage, order processing and fulfillment, as well as additional charges that may arise depending on the circumstances of FBA usage. Sellers are also responsible for the standard selling fees applicable to Amazon. Understanding how Amazon FBA fees are calculated and which cost components require consideration is therefore essential to evaluating the overall cost structure. This article examines the key Amazon FBA fees, the factors that influence operating costs, and the approach to calculating profitability, providing a basis for sellers to evaluate the suitability of FBA and FBM.

 

1. What Are Amazon FBA Fees?

Fulfillment by Amazon (FBA) is an order fulfillment service provided by Amazon, under which Amazon assumes responsibility for key fulfillment activities. The process comprises the following stages:

• Prepare and ship inventory to an Amazon fulfillment center.

• Amazon receives and stores the inventory.

• When a customer places an order, Amazon picks, packs, and delivers the product to the customer.

• Amazon provides customer service and processes returns in accordance with applicable policies.

According to Amazon, Amazon FBA fees do not include a separate fixed monthly fee specifically for the FBA service. Costs arise from order fulfillment, inventory storage, and other applicable services or circumstances.

Distinguishing FBA Fees from Amazon Selling Fees

Amazon FBA fees are costs incurred when a business uses Amazon's fulfillment services. By contrast, charges such as selling plan fees and referral fees fall under Amazon selling fees rather than Amazon FBA fees.

When calculating total operating costs, businesses should therefore distinguish between these two categories to avoid understating their actual cost structure.

 

2. Key Types of Amazon FBA Fees

Amazon currently categorizes FBA costs into three main groups: fulfillment fees, storage fees, and other FBA-related costs that may arise depending on specific circumstances.

2.1. Fulfillment Fees

Amazon FBA fulfillment fees, are charges collected for activities such as picking, packing, delivery, and customer service.

The applicable fee is determined by the characteristics of each product, with key factors including:

• Product category.

• Product dimensions after packaging.

• Billable weight.

• Certain product-specific characteristics that may result in a different fee structure.

Accordingly, two products with the same selling price may incur different fulfillment costs if their dimensions or weight differ.

When Are FBA Fulfillment Fees Charged?

According to Amazon’s guidance, FBA fulfillment fees are charged per unit when an order is shipped to the customer by Amazon. The fee is recorded in the seller’s payment account and affects the amount ultimately disbursed to the seller. Therefore, sellers should review transaction-level details in Seller Central to reconcile actual fees rather than relying solely on the amount disbursed by Amazon.

2.2. Amazon FBA Storage Fees

Amazon FBA storage fees are primarily determined based on the average daily volume of inventory stored and the applicable rates during different periods of the year. Additional surcharges may apply depending on inventory conditions and storage duration.

Are FBA fees charged if the products do not sell? Yes. Even when a product has not generated any orders, sellers are still responsible for storage fees as long as the inventory remains in Amazon’s fulfillment centers. By contrast, standard fulfillment fees are generally incurred only when Amazon ships the product to the customer.

For inventory that remains in storage for an extended period, businesses may also incur aged inventory surcharges or costs associated with inventory removal and liquidation, depending on the circumstances. Therefore, when using FBA, sellers should consider both the volume of inventory sent to Amazon and the expected inventory turnover rate, rather than estimating costs solely based on the number of units sold.

2.3. FBA Fees That Apply Depending on Specific Circumstances

In addition to fulfillment and storage fees, certain charges arise only when a specific circumstance occurs or when the seller uses a corresponding service, including:

• Aged inventory surcharge: Amazon may charge this monthly for inventory stored at fulfillment centers for 181 days or longer, subject to applicable conditions and fee schedules.

• Returns processing fee: May apply when Amazon processes eligible customer returns, depending on the product category, return policy, and applicable conditions.

• Inbound placement service fee: Relates to how inventory is distributed across Amazon's fulfillment center network.

• Removal, disposal, or liquidation fees: Arise when a business instructs Amazon to process inventory through the corresponding disposal, removal, or liquidation services.

These costs do not necessarily apply to every order but should be incorporated into the overall FBA cost assessment.

2.4. FBA Costs That May Arise Depending on Circumstances 

FBA costs are influenced not only by product characteristics but also by how businesses manage inventory and operate their sales activities. To minimize unnecessary charges, sellers can focus on the following areas:

• Optimize product packaging: Review product dimensions and weight after packaging to select an appropriate packaging configuration that meets Amazon’s requirements without unnecessarily increasing fulfillment fees.

• Manage inventory levels: Use sales volume and inventory turnover to plan replenishment, avoiding excess inventory and potential aged inventory surcharges.

• Monitor seasonal costs: Storage fees may increase during peak shopping periods. Businesses should adjust their inventory replenishment plans accordingly and address slow-moving products at an early stage.

• Review actual fees: Use reports in Seller Central to reconcile fulfillment fees, storage fees and other charges against projected costs.

Amazon also provides the Inventory Performance Dashboard, which enables sellers to monitor inventory performance and related metrics. Regular review of inventory data allows businesses to adjust replenishment plans before storage-related costs have a material impact on profitability.

 

3. How to Calculate Amazon FBA Profit

Amazon sales revenue does not represent the full profit ultimately retained by the business. In addition to COGS, sellers need to account for referral fees, Amazon FBA fulfillment fees, storage fees, transportation to Amazon fulfillment centers, and other operating costs.

According to Amazon's guidance on calculating profit margins, profit is determined by the difference between revenue and costs. Amazon also recommends using the FBA Revenue Calculator to estimate costs and profitability when selecting a fulfillment method. Based on this principle and the FBA fee categories published by Amazon, estimated profit per product can be summarized as follows:

FBA costs include fulfillment fees, allocated storage costs, and other charges that may arise depending on specific circumstances. Transportation costs from Vietnam to Amazon fulfillment centers should also be included, although these are not FBA fees directly charged by Amazon.

For shared costs such as storage or advertising, businesses should allocate costs appropriately across individual products and avoid double-counting expenses already included in COGS. The resulting calculation is an estimate and may vary based on actual costs incurred during the sales process.

 

4. Example: Calculating Amazon FBA Profit

Assume a Vietnamese seller sells a household product on Amazon US at a selling price of USD 30 per unit and uses FBA for inventory storage and order fulfillment. To estimate profitability, the seller assumes the following costs allocated to each unit:

Applying the formula:

Estimated profit = 30 − 8 − 4.5 − 4 − 0.5 − 2 − 3 = USD 8 per unit

Accordingly, at a selling price of USD 30, the seller can estimate USD 8 in profit per unit after deducting the costs listed above, equivalent to an estimated profit margin of approximately 26.7%.

Note: All prices and costs in this example are hypothetical figures intended solely to illustrate the profit calculation methodology and do not represent Amazon's actual FBA fee schedule. The calculation excludes taxes and other costs that may arise, such as returns processing fees, aged inventory surcharges, general operating expenses, or additional service charges. Actual fees depend on product characteristics, marketplace, and Amazon's policies applicable at the time.

To estimate costs more accurately for specific products, sellers can use the Amazon Revenue Calculator and reconcile the results against actual fee reports in Seller Central.

 

5. Should Sellers Choose Amazon FBA or FBM?

In addition to FBA, sellers can use Fulfilled by Merchant (FBM), a fulfillment model in which inventory management and order fulfillment are handled through the seller’s own operations or an external logistics provider. Unlike FBA, FBM gives sellers greater control over inventory storage, packaging and shipping, while also placing responsibility for the fulfillment process on the seller.

According to Amazon’s guidance on FBA and FBM, each fulfillment model may be more suitable depending on the characteristics of the products and the seller’s operational capabilities.

FBA may be suitable for products with stable sales volumes and businesses seeking to reduce the operational burden associated with fulfillment. By contrast, FBM may be worth considering when sellers have an established logistics infrastructure or require greater control over inventory and fulfillment operations.

Neither model is universally more cost-effective. Sellers should use the Amazon Revenue Calculator to compare the projected costs and profitability of both fulfillment models for each product. Businesses may also combine FBA and FBM across different products based on their specific operational and commercial requirements.

 

Managing FBA Costs and Profitability with Accurate Accounting Data

Understanding individual Amazon FBA fees enables sellers to estimate costs and select an appropriate operating model. However, assessing actual profitability requires businesses to regularly reconcile revenue, marketplace fees, returns, and settlement transactions rather than relying solely on selling prices or sales figures reported by Amazon.

Sliner supports Amazon sellers in standardizing accounting data and reconciling revenue and costs. Genbook, Sliner's partner, provides accounting automation solutions that consolidate transaction data and reconcile Amazon fees and settlement transactions, enabling businesses to monitor commercial performance more effectively. In addition, GenInvoice, a Genbook feature, supports order data synchronization and batch issuance of electronic invoices, reducing manual work throughout the invoicing process.

Explore Accounting Automation or contact Sliner to discuss accounting, reconciliation, and electronic invoicing solutions tailored to Amazon operations.