Amazon FBA, short for Fulfillment by Amazon, is a service that lets you store your products in Amazon’s warehouses and have Amazon handle packing, shipping, customer service, and returns on your behalf. You sell the product, and Amazon takes care of getting it to the customer’s door. It’s the backbone of how many third-party sellers run their businesses on the platform, and it’s what makes those products eligible for Prime two-day shipping.
How FBA Works
The basic concept is straightforward: you send your inventory to Amazon, and they do the rest. In practice, it breaks down into a few key steps.
First, you create product listings in Amazon’s Seller Central dashboard and designate them as FBA items (as opposed to items you’d ship yourself). Then you prepare your inventory according to Amazon’s packaging and labeling requirements and ship it to one of Amazon’s fulfillment centers. Amazon provides a guided workflow for creating shipments, including instructions on how to pack and label everything. If you’d rather not handle the prep work, Amazon offers paid prep and labeling services.
Once your inventory arrives at the fulfillment center, Amazon stores it until a customer places an order. When someone buys your product, Amazon picks it from the shelf, packs it, ships it, and handles any customer service questions or returns that come up afterward. You monitor everything through Seller Central, where tools like restock alerts and inventory forecasting help you keep popular items in stock and avoid sitting on excess inventory.
What FBA Costs
FBA isn’t free. Amazon charges several layers of fees, and understanding them is critical before you commit inventory to the program.
Selling plan fees come first. Amazon offers two account types: an Individual plan at $0.99 per item sold, and a Professional plan at $39.99 per month with no per-item fee. If you’re selling more than about 40 items a month, the Professional plan is cheaper.
Referral fees apply to every sale regardless of how you fulfill it. Amazon takes a percentage of each sale price, and the rate varies by product category, typically ranging from 8% to 15%.
Fulfillment fees are what you pay specifically for FBA’s pick, pack, and ship service. These vary based on the size and weight of your product. Amazon groups items into size tiers: small standard, large standard, small bulky, large bulky, and extra-large. For most categories, the fee is calculated using whichever is greater, the actual unit weight or the dimensional weight (the package’s volume divided by 139). Products priced under $10 automatically receive discounted fulfillment rates, averaging about $0.86 less per unit than standard rates. Starting April 17, 2026, Amazon is applying a 3.5% fuel and logistics surcharge on top of fulfillment fees.
Storage fees are charged monthly based on the cubic footage your inventory occupies in Amazon’s warehouses. Rates are higher during the holiday season (October through December) than the rest of the year. If inventory sits unsold for an extended period, you’ll face additional aged-inventory surcharges, which is Amazon’s way of discouraging sellers from using its warehouses as long-term storage.
Low-inventory-level fees kick in when your stock drops below 28 days of supply relative to customer demand. This fee applies to standard-sized and bulky products and is charged per shipped unit. Amazon wants you to keep enough inventory on hand to fulfill orders reliably.
There are also fees for products that ship in their own branded packaging (some categories get discounts for this, while others see surcharges if the product isn’t certified), and oversize surcharges for extra-large items exceeding certain dimensions.
What You Need to Get Started
Setting up an Amazon seller account requires a few pieces of documentation: a government-issued ID, a bank account and routing number, a credit card (Visa or Mastercard), your tax information, a phone number, and an email address. Amazon verifies your identity during registration, and the process can take a few days.
Once approved, you’ll configure your Seller Central account with payment details, shipping settings, and return policies. From there, you list products and choose FBA as your fulfillment method. You can apply FBA to some of your catalog and handle others yourself, mixing and matching as needed.
Why Sellers Use FBA
The biggest draw is Prime eligibility. Products fulfilled through FBA automatically get the Prime badge, which signals fast, free shipping to Amazon’s massive base of Prime subscribers. That badge meaningfully increases visibility in search results and conversion rates. Shoppers are far more likely to buy a product that arrives in two days at no extra shipping cost.
FBA also removes the operational burden of fulfillment. You don’t need warehouse space, packing materials, shipping carrier accounts, or customer service staff to handle order inquiries and returns. This makes it practical for solo entrepreneurs or small teams to sell at high volume without building out logistics infrastructure. Many sellers describe it as a hands-off model that frees them to focus on sourcing products, optimizing listings, and running advertising.
FBA vs. Fulfilling Orders Yourself
The alternative to FBA is Fulfilled by Merchant, or FBM, where you store inventory and ship orders directly to customers. FBM gives you complete control over packaging, shipping speed, and the customer experience. It also means you avoid FBA’s fulfillment and storage fees, which can significantly improve margins on low-cost or heavy items where those fees eat into profit.
The trade-off is that FBM listings don’t carry the Prime badge by default. There is a Seller Fulfilled Prime program, but qualifying requires a Professional selling account, meeting strict performance benchmarks, and completing a 30-day trial to prove you can deliver a Prime-level shipping experience. Most small sellers find this difficult to achieve.
Many experienced sellers use both. They put their best-selling, fast-moving products in FBA to capture Prime traffic, and fulfill slower-moving or bulky items themselves to keep storage costs down.
Products You Can’t Send to FBA
Amazon prohibits certain items from its fulfillment centers. The list includes alcoholic beverages (including non-alcoholic beer), vehicle tires, gift cards and stored-value instruments, loose packaged batteries, and counterfeit or illegally reproduced goods. Hazardous materials weighing 50 pounds or more per package are also banned. Any product that arrives at a fulfillment center without proper labeling, or that hasn’t been prepped according to Amazon’s packaging requirements, will be rejected.
Some product categories require approval before you can list them at all, whether you use FBA or not. And it’s your responsibility to know whether your products are classified as dangerous goods. If Amazon identifies hazmat items that weren’t properly declared, it can dispose of the inventory without reimbursing you.
Is FBA Worth It
FBA works best when your products are small to mid-sized, sell consistently, and carry enough margin to absorb the layered fees. A lightweight item priced at $25 with healthy demand is a good FBA candidate. A heavy, slow-selling item priced at $12 might lose money after fulfillment fees, storage costs, and referral percentages are subtracted.
Before committing, calculate your per-unit economics. Add up the referral fee, the fulfillment fee for your product’s size and weight tier, and estimated monthly storage costs. Subtract those from your selling price, along with your product cost, and see what’s left. Amazon provides a revenue calculator in Seller Central that estimates FBA fees for specific products, which is worth running before you ship a single box to a fulfillment center.