Amazon FBA fees can seem complicated at first, but they boil down to paying Amazon to store, pack, and ship your products, along with handling customer service and returns. Essentially, you're outsourcing the heavy lifting so you can focus on growing your business.
The fees are split into three main categories:

Fulfillment Fees: These are the costs for Amazon to pick, pack, ship, and handle your product. They’re based on your product's size and weight. For example, a small and lightweight item like a phone case will cost less than a bulky item like a blender. Amazon provides an FBA Fee Calculator you can use to estimate these costs ahead of time.

Storage Fees: Amazon charges you to store your inventory in their warehouses. These fees are calculated monthly and are based on the volume of your inventory in cubic feet. You'll also be hit with long-term storage fees if you have slow-moving stock or inventory that sits for a long time (over 365 days).

Referral Fees: Amazon takes a cut of every sale—it’s like their commission for letting you sell on their platform. This fee is a percentage of the selling price (including shipping, if you charge for that) and usually ranges from 8% to 15%, depending on your product category. For instance, books are typically 15%, while electronics might be 8%.

In simple terms, Amazon FBA fees are all about paying for convenience. You're paying them for logistics and customer service, so you don’t have to worry about it. Ensure you price your products high enough to absorb these fees while staying competitive.