FBM stands for Fulfilled by Merchant, a selling method on Amazon where you store, pack, and ship products to customers yourself instead of sending inventory to Amazon’s warehouses. It’s the alternative to FBA (Fulfilled by Amazon), where Amazon handles all of that for you. If you’ve seen “FBM” in a product listing, a seller forum, or an ecommerce guide, this is what it refers to.
How FBM Works
When you sell through FBM, you keep your own inventory at your home, office, warehouse, or a third-party logistics provider. When a customer places an order on Amazon, you pick, pack, and ship it directly to them. You also handle returns and customer service inquiries related to those orders.
The basic process looks like this:
- List your products on Amazon through a seller account (a Professional account gives you access to the full range of FBM tools).
- Set your shipping settings including handling time, transit time, and capacity limits. Amazon offers a Shipping Settings Automation tool that calculates shorter, more precise delivery dates for customers, which can help drive sales.
- Ship orders as they come in. You can purchase shipping labels through Amazon Buy Shipping, which offers pre-negotiated carrier rates that average over 31% lower than retail ground rates for UPS, FedEx, and USPS. Or you can use your own shipping accounts.
- Manage returns and cancellations. You need to check regularly for buyer-requested cancellations and respond to return requests within 24 hours. If you don’t respond, Amazon automatically authorizes the return.
How FBM Differs From FBA
With FBA, you ship your products in bulk to Amazon’s fulfillment centers. Amazon stores them, and when a customer orders, Amazon picks, packs, ships, and handles customer service and returns on your behalf. It’s a hands-off approach that frees up your time but costs more in fulfillment and storage fees.
FBM gives you direct control over the entire process. You decide how items are packaged, which carriers to use, and how quickly orders go out. This matters if you sell fragile, oversized, or customized products that need special handling, or if you want direct access to your inventory at all times. The tradeoff is that you’re responsible for every step, from warehouse organization to printing shipping labels to processing refunds.
One important difference involves the Featured Offer (formerly called the Buy Box), which is the prominent “Buy Now” and “Add to Cart” section on a product page. FBA sellers generally have an easier time winning this spot because Amazon trusts its own fulfillment network for speed and reliability. FBM sellers can still win the Featured Offer, but competitive pricing and strong delivery performance become especially important.
Return Rules for FBM Sellers
Amazon holds FBM sellers to specific return and refund standards. As of early 2026, prepaid return labels are mandatory for US FBM orders, generated through Amazon’s Buy Shipping system. When a customer uses one of these prepaid labels, the refund triggers automatically at the first carrier scan, before you even receive the item back.
Once a return arrives, you have four calendar days to inspect the item and issue a refund. If you miss that window, Amazon automatically refunds the full amount. For return requests that fall outside Amazon’s standard policy (certain product categories or situations), you have 24 hours to respond manually. No response means Amazon authorizes the return on your behalf.
Seller Fulfilled Prime
One downside of standard FBM is that your listings don’t carry the Prime badge, which many shoppers filter for. Seller Fulfilled Prime (SFP) is a program that lets FBM sellers display the Prime badge while still shipping from their own facilities.
To qualify, you need a Professional selling account with a domestic US shipping address and must meet performance thresholds for late-shipment rates, valid-tracking rates, and cancellation rates. You then enter a 30-day trial where you fulfill orders using a special shipping template with one-day and two-day delivery options. Pass the trial, and your eligible products get Prime branding.
Staying in the program requires ongoing performance. Amazon reviews your metrics weekly, and repeated failures can result in your Prime offers being disabled or full disenrollment. You can set daily limits on how many same-day, one-day, and two-day Prime orders customers can place, which helps you avoid overcommitting beyond your shipping capacity.
When FBM Makes Sense
FBM tends to work well for sellers who already have warehouse space and shipping infrastructure, sell products that are heavy, oversized, or slow-moving (where FBA storage fees would add up fast), or offer customized and made-to-order items that can’t sit in Amazon’s warehouses. It’s also common among sellers who use multiple sales channels and want a single inventory pool rather than splitting stock between their own warehouse and Amazon’s fulfillment centers.
If you’re a newer seller testing products or selling in small volumes, FBM lets you start without the upfront investment of shipping bulk inventory to Amazon. You can always switch individual products to FBA later once you know they sell consistently and the math works out on fulfillment fees.