FBMFulfillment by Merchant
FBM means the seller stores, packs, and ships their own orders rather than using Amazon's warehouse network. It offers more control but typically loses Prime eligibility.
What is FBM?
With FBM (also called MFN — Merchant Fulfilled Network), sellers handle every step of fulfillment: storing inventory in their own warehouse or third-party logistics (3PL) facility, picking and packing orders, printing shipping labels, and managing carrier relationships. Amazon provides the order notification and buyer communication framework, but the physical logistics are entirely the seller's responsibility.
FBM sellers can qualify for Prime through Seller Fulfilled Prime (SFP), which requires meeting Amazon's strict performance thresholds (99%+ on-time shipping, 0.5% cancellation rate or less) and using Amazon Buy Shipping for labels. SFP gives Prime badge visibility while maintaining warehouse control.
The main reasons sellers use FBM include: selling oversized or heavy items where FBA fees are prohibitive, maintaining control over packaging and unboxing experience, avoiding long-term storage fees during slow periods, and testing new products before committing inventory to FBA.
Why it matters for sellers
FBM preserves the margin that FBA fees consume. For low-price, heavy, or bulky items, FBA fees can exceed the product's profit margin entirely. A 10lb item with a $20 selling price may be unprofitable on FBA but viable on FBM if the seller has efficient warehouse operations.
FBM also provides a safety net. When FBA inventory runs out or Amazon restricts restock limits, having an active FBM listing at a slightly higher price keeps your listing live and protects your keyword ranking. Running both FBA and FBM on the same ASIN — a 'hybrid' approach — is a best practice for best-sellers.
How to use FBM
For every FBA listing, create a backup FBM offer on the same ASIN at 5–10% above your FBA price. If FBA inventory depletes, the FBM offer automatically becomes active and keeps the listing generating sales and maintaining keyword rank. This is especially critical during Q4 when FBA restock delays are common.
For 3PL-based FBM, negotiate rates based on monthly order volume. Most 3PLs price pick-and-pack at $1.50–$3.50 per order plus storage. Compare this against FBA fees for your specific product dimensions and weight to determine which model is more profitable.
Real-world example
A heavy-duty tool brand sells a $35 item that weighs 4lbs. FBA fees are $8.20 per unit, leaving a 19% margin. Running FBM through their own warehouse at $2.80 per order fulfillment cost leaves a 34% margin — nearly double. They keep FBA as a backup for Prime badge visibility but fulfil 80% of orders from their own warehouse.
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Frequently asked questions about FBM
What is the difference between FBA and FBM?
FBA (Fulfillment by Amazon) sends your inventory to Amazon's warehouses; Amazon picks, packs, and ships orders. FBM (Fulfillment by Merchant) means you handle your own storage and shipping. FBA typically earns Prime badge and higher Buy Box priority; FBM gives more margin control and packaging flexibility.
Can FBM sellers get the Prime badge?
Yes, through Seller Fulfilled Prime (SFP). SFP requires meeting Amazon's performance standards (99%+ on-time delivery, same-day or next-day handling) and using Amazon Buy Shipping. SFP is available to established sellers with strong metrics — it's not available to new accounts.
Is FBM or FBA better for a new seller?
FBA is generally easier for new sellers: Amazon handles customer service, returns, and Prime badge eligibility. FBM makes sense if your product is large, heavy, or has a very low price where FBA fees would eliminate your margin. Many experienced sellers run both simultaneously.