Logistics is where many brands get stuck: a warehouse to size, deliveries to guarantee in timeframes customers now take for granted, returns to handle. Amazon FBA (Fulfillment by Amazon) exists to lift that load off the seller: you hand your stock to Amazon and from there storage, shipping and returns become its job. Delegating does not mean disengaging, though: FBA needs to be understood and managed, or its costs will eat your margins. Here is how it actually works.
What Amazon FBA is and how it works
FBA is the service that lets you run your orders through Amazon's logistics network. The flow is straightforward:
- You ship your stock to Amazon's fulfillment centers, following the prep and labeling requirements
- Amazon receives the goods, catalogs them and stores them
- When a customer orders, Amazon picks, packs and ships the parcel
- Returns and delivery-related support are handled by Amazon, not by your team
For a company this means absorbing order spikes without hiring staff or renting warehouses. Logistics capacity stops being the bottleneck of growth, and internal resources are freed up for the work that moves the numbers: catalog, content, advertising.
The Prime badge, the real reason FBA pays off
Every product fulfilled through FBA earns the Prime badge. That is not a cosmetic detail: a large share of Amazon customers filter results by fast delivery and never even see offers without the badge. Delivery in 24-48 hours lifts conversion, and conversion feeds ranking: Amazon's algorithm rewards offers with a reliable delivery experience. FBA also carries weight in the Buy Box competition. In short, on Amazon logistics is not a back-office service: it is a positioning factor.
What stays on your plate
FBA is not an autopilot. The decisions that determine whether the service creates or destroys margin remain yours. You have to forecast demand and plan restocks, because a stockout sinks a ranking built over months. You have to meet the prep and labeling requirements: a non-compliant shipment can be refused at the fulfillment center, with delays that ruin a launch. You need primary packaging that protects the product, because an item that arrives damaged generates returns and negative reviews that land on your brand. And you must deal with returns unfit for resale, which do not go back on sale by themselves: without a recovery or disposal routine they pile up in the warehouse, at your expense.
What it costs: fulfillment and storage fees
FBA has two main families of costs. The fulfillment fee is charged per order and depends on the product's weight and dimensions: the tiers are precise, and optimized packaging can drop a product into a cheaper bracket. Storage fees are charged monthly on the volume you occupy and rise during peak season: stock that does not turn quickly becomes dead weight, and long-term storage triggers extra charges. The golden rule: smaller, more frequent batches beat a warehouse full of idle goods.
Getting started: from the first shipment to test batches
You enter FBA through Seller Central: you create a shipment, declare the products, print the labels and send the goods to the centers Amazon assigns. Before shipping, check the fee estimate for each SKU: Amazon shows a preview of fulfillment costs, and some products simply do not work in FBA given the ratio between selling price, weight and volume. Start with small batches: the first shipment is there to measure real sell-through, not to fill the warehouse. If you sell in several European countries, the service extends through the EFN and Pan-European programs, serving other marketplaces from your Italian stock or with distributed inventory.
The mistakes that eat your margins
- Overestimating initial demand and paying months of storage on unsold stock
- Ignoring the weight and size tiers when designing your packaging
- Letting best sellers run out of stock: the ranking collapses and rebuilding it is expensive
- Forgetting unsellable returns, which pile up in Amazon's warehouses
- Treating FBA as an autopilot, without monitoring Inventory Health and performance
FBA alone does not sell
Perfect logistics does not generate demand: it puts the product in the best position to convert the traffic it receives. Growth needs the other pillars: listings optimized with serious Amazon SEO work, so the product shows up where customers search, and advertising campaigns synchronized with inventory, because pushing a product that is about to run out is the fastest way to waste budget and ranking. FBA multiplies the results of a strategy that works; it does not replace one.
If you are considering FBA for your catalog, or you already use it and the costs feel out of control, let's talk: we analyze products, fees and stock rotation and show you where to recover margin.