Amazon FBA Explained: How It Works in 2026

Amazon FBA (Fulfillment by Amazon) is a fulfillment option where, once your products reach Amazon's fulfillment network, steps such as storage, order preparation, delivery and customer service are carried out by Amazon. Because the product, marketplace and cost structure all vary, FBA should not be assumed to suit every product.

This guide explains FBA's operating model, cost control and first-shipment planning in general terms. Decisions about accounts, tax, customs and product eligibility depend on the marketplace and the seller's situation; check the current requirements in Seller Central, and qualified professional advice where needed, before acting.

How FBA works: the 60-second version

You send products into Amazon's fulfillment network; within the FBA scope, Amazon carries out defined parts of order preparation, packing, shipping, customer service and returns. Product eligibility, the delivery promise and the customer experience can vary by marketplace and by offer.

The real cost lines

FBA isn't "free operations"; pricing correctly starts with knowing the lines:

• Fulfillment costs: vary with the scope of order preparation, packing, shipping, customer service and returns handling. Amazon states that the cost is affected by product attributes such as price, weight and dimensions.
• Storage costs: calculated on the space your inventory occupies; can vary by product and by period.
• Referral fee and other costs: vary by category, selling plan and the services you use.
• Inbound logistics and import costs: set by the carrier, the Incoterms, customs obligations and the destination market.

For a product-specific decision, compare FBA and your own fulfillment model under the same assumptions in the Amazon Revenue Calculator. The calculator is an estimate; add your product's own costs — purchasing, import, FX, advertising, returns and tax — separately.

Build your own FBA profit scenario

A fixed example price or margin will not give you a reliable decision for your product. In Amazon's Revenue Calculator, enter your selling price, dimensions/weight, monthly inventory and sales assumptions and compare FBA with your own fulfillment option side by side. Then add your own product cost, freight, import, advertising, returns and tax assumptions. The tool's output is an estimate; real costs can differ. See Amazon FBA costs for how the lines fit together, and our FBA profit calculator for a product-level scenario with your own inputs.

FBA or FBM?

• Consider FBA when the product's cost estimate, storage need, delivery expectation and your operating capacity line up with FBA.
• Consider FBM when personalization, your own warehouse process, or the product's size/weight profile makes your own fulfillment model the better fit.
• Compare both models by entering the same product, selling price, sourcing cost and volume assumptions into the Revenue Calculator. Refresh the result as marketplace and product conditions change.

What you need before starting from Turkey

First, confirm in Seller Central that your selling account and your products are eligible for the target marketplace. Amazon states that FBA can be used with either an Individual or a Professional selling plan, and that the verification, product eligibility, documentation and shipment details required can vary by account and marketplace. Evaluate company, tax, payment, barcode and brand decisions against the marketplace's current requirements and with qualified legal/tax advice. Then assign the relevant products to FBA and start the shipment flow.

1. Prep to FBA standards

Labeling, packaging and prep requirements can vary by product, category and marketplace. Before creating a shipment, check the current prep, barcode and routing instructions Seller Central shows for that offer. Compare doing prep yourself with a third-party prep service on cost, quality control and lead time under the same scenario.

2. Create the shipment plan

The shipment flow in Seller Central collects which inventory is being sent, carton details and transport information. Amazon's Send to Amazon guide explains the shipment and tracking steps. Verify carton, label and delivery details before creating the shipment.

3. Move the freight

For shipments from Turkey, the transport method, customs handling and delivery terms depend on the product, the destination country and your contract. Get written confirmation of scope and charges from the carrier or customs broker, and enter the delivery and tracking information Amazon requests into the shipment flow. Plan the first batch on verified demand and cash-flow assumptions rather than assuming a large first shipment as a rule.

4. Manage the stock flow

Build the inventory plan on sales velocity, supplier lead time, receiving time and a margin for uncertainty. As a simple planning model, the reorder point can be calculated as expected sales velocity × lead time + the safety stock you choose. This is an example model and may not be sufficient for your product, marketplace or season. Weigh storage costs against stock-out risk in the same cash-flow table.

5. Watch returns and account health

Review return data regularly. Compare recurring reasons against product information, sizing, variations, packaging and quality control. Before changing anything, isolate which orders and product groups the problem occurs in; a return rate on its own does not show cause and effect.

Five common mistakes

• Setting a price without entering the product's dimensions, weight and packaging into the Revenue Calculator
• Deciding the first shipment quantity without demand and cash-flow assumptions
• Not checking the current prep and labeling requirements at product level
• Tracking inventory, returns and fee data separately instead of combining them in one unit-economics table
• Comparing FBA and your own fulfillment model under different assumptions

FAQ

Do I need a company for FBA? Seller registration, tax and verification requirements depend on the target marketplace and your business structure. Check the current Seller Central requirements and, where needed, a qualified tax/legal professional. Our US LLC guide is only a general starting point.

How many products should I start with? There is no universal right number. Choose a starting scope you can measure, in line with your capital, lead time, return risk and test budget.

How do I check storage capacity? Check the inventory and shipment screens in Seller Central for current capacity and shipment eligibility; don't assume account-specific limits from the outside.

Where do I check FBA fees? Check Amazon's FBA cost guide and its fee estimate tools together with your current offer and product data.

What is the difference between FBA and FBM? With FBA, Amazon carries out fulfillment services for inventory accepted into the program; with FBM, you or a provider you choose run the fulfillment process. Compare both models for the same product and cost assumptions in the Revenue Calculator.

How are Amazon FBA fees calculated? Amazon's estimate tool produces a cost and revenue estimate based on the product, price, dimensions/weight, selling plan and fulfillment option. Add your own sourcing, freight, tax, advertising and return assumptions separately; use our FBA profit calculator only to build a scenario with your own inputs.

How much capital does FBA take to start? It depends on the product, first-batch size and ad budget; there is no single right number. What locks capital up is stock and the payout delay: see your own first-90-day cash need in the cash-flow simulator.

Is FBA available on other Amazon marketplaces? The FBA program, eligibility and operating flow vary by marketplace. Check the program and product-eligibility information in the current Seller Central pages of the Amazon store you plan to sell in; this guide is based on Amazon.com sources.

The takeaway

FBA does not guarantee profit or visibility for your product. Make the decision by comparing product dimensions, cost, demand, return risk and the fulfillment alternatives under the same assumptions. For the full journey see the Amazon guide; for a product-level calculation, our FBA profit calculator.

Official sources and scope

This guide is general educational content, not legal, tax, customs or financial advice. For FBA's service scope and cost logic use Amazon's FBA overview; for product-level cost comparison use the Revenue Calculator. Amazon policies, marketplace fees and seller requirements can change.