Demystifying Amazon FBA Fees: Referral, Fulfillment, and Storage Costs Breakdown

July 14, 2026 · Seller AI

Understanding Amazon FBA fees is crucial for any seller looking to optimize their profits. This guide will break down the three main types of FBA fees: referral, fulfillment, and storage costs.

Amazon FBA Fees Overview

Amazon FBA (Fulfillment by Amazon) is a service that helps sellers handle storage, packing, shipping, and customer service. However, it comes with various costs that can impact your profit margins. To maximize your earnings, it's essential to understand these fees in detail.

Referral Fees

Referral fees are charged when your product is sold on Amazon. They vary by category and are a percentage of the item's sale price. For example, for clothing, the referral fee is 17%, while for books, it's 15%.

Fulfillment Fees

These fees cover the cost of Amazon picking, packing, and shipping your orders. They depend on the item's weight and dimensions. For standard-sized items in the US, fulfillment fees start at $2.41 for the first ounce and $1.03 for each additional ounce.

To calculate fulfillment fees, use Amazon's FBA Revenue Calculator. Enter the item's weight, dimensions, and selling price to get an estimate.

Storage Fees

Storage fees are charged monthly for the space your inventory occupies in Amazon's warehouses. They are divided into two types: long-term storage fees (LTSF) and monthly inventory storage fees.

LTSF is charged on a per-unit basis for items stored in Amazon's warehouses for more than a year. As of 2026, LTSF is $0.75 per unit.

Monthly inventory storage fees are charged on the average number of days your inventory is stored. For standard-sized items, the fee is $0.71 per cubic foot.

Optimizing FBA Fees

To minimize FBA fees, consider the following strategies:

• Reduce referral fees: Optimize your listing with high-quality images, detailed descriptions, and competitive pricing.
• Lower fulfillment fees: Choose lightweight, compact packaging to reduce handling fees.
• Minimize storage fees: Use Amazon's inventory performance index (IPI) to manage your inventory levels and avoid overstock.

Seller AI's Approach to Amazon FBA Fees

At Seller AI, our AI agents help Amazon sellers navigate the complexities of FBA fees. We analyze your product data and provide tailored recommendations to optimize costs and maximize profits.