FBM (Fulfilled by Merchant) is the Amazon fulfillment model in which the seller ships orders to customers themselves — from their own warehouse or through a 3PL — instead of sending inventory to Amazon's fulfillment network. Amazon also calls it MFN (Merchant Fulfilled Network). The seller keeps control of inventory, packaging, and carriers, and handles customer service and returns for those orders.
FBM is the counterpart to FBA (Fulfillment by Amazon), where Amazon stores and ships the products. The two are not rivals so much as tools: most serious Amazon businesses end up using both.
How does FBM work?
- You list normally. Products sit on the same Amazon listings; only the fulfillment channel setting differs. Amazon's referral fee applies to every sale either way — what FBM removes are FBA's fulfillment and storage fees, replaced by your own warehousing and shipping costs.
- You ship each order. Orders arrive in Seller Central; you (or your 3PL) pick, pack, ship within the promised handling time, and upload valid tracking.
- You carry the service load. Delivery questions, returns, and refunds for FBM orders are the seller's job, under Amazon's return-policy rules.
- Amazon watches the metrics. Late shipment rate, valid tracking rate, on-time delivery, and cancellation rate are enforced on merchant-fulfilled orders — sustained misses put the whole account's health at risk.
FBA vs. FBM vs. Seller Fulfilled Prime
When does FBM beat FBA?
- Oversized and heavy products, where FBA's size-tier fees eat the margin and your own or 3PL shipping is cheaper.
- Slow movers that would accumulate FBA storage and aged-inventory surcharges.
- Multi-channel brands running one inventory pool for Amazon, D2C, and other marketplaces from a 3PL — instead of stock locked inside Amazon's network.
- Resilience. An active FBM offer keeps listings live and selling when FBA inbound is delayed, stock is stranded, or Q4 capacity limits bite.
- Special-handling products that FBA restricts or handles poorly — fragile, bulky, or compliance-sensitive items.
What do brands get wrong with FBM?
- Underestimating the metrics regime. FBM is not "just ship it": late shipments, missing tracking, and cancellations are measured, and sustained misses jeopardize the entire account — including its FBA listings.
- Fulfilling EU customers from a US warehouse. Cross-border FBM turns every order into an individual import — slow, customs-exposed, and expensive. Serious European volume needs European inventory, which brings the import setup with it: an importer of record, and VAT registration wherever the stock sits.
- Expecting FBA-level conversion without the badge. Prime-eligible offers convert better and are favored for the Featured Offer. FBM works best where the badge matters less — oversized items, low-competition listings — or where price and strong metrics can still win.
- Pricing FBM "cheaper" without full cost accounting. No FBA fees does not mean free: warehouse space, labor, packaging, and carrier rates are real costs that belong in the per-unit calculation before declaring FBM the better deal.
FAQ
Does FBM get the Prime badge?
Not by default. Merchant-fulfilled offers only carry Prime through the Seller Fulfilled Prime program, which requires meeting strict delivery-speed and performance requirements from your own logistics.
Is FBM cheaper than FBA?
It depends on the product. Amazon's referral fee applies either way; the difference is FBA's fulfillment and storage fees versus your own warehousing and shipping costs. FBM tends to win on oversized, heavy, and slow-moving items — FBA on small, fast-moving ones.
Can I use FBA and FBM at the same time?
Yes, even on the same listing. Running both is common practice: FBA for speed and the badge, FBM as the backstop that keeps the offer live through FBA stockouts, inbound delays, and peak-season capacity limits.
FBM done well needs warehouses, carrier contracts, and flawless order operations in every market you sell — and in Europe, the import and VAT setup behind them. eBrands runs all of it, on both sides of the Atlantic, as your operating partner and Merchant of Record — see how we operate Amazon end to end.
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