When you sell on Amazon, you have two main options for getting products to customers: Fulfilment by Amazon (FBA) and Fulfilment by Merchant (FBM). Each has its strengths, and the right choice depends on your products, budget, and how you want to run your business.
What Is FBM?
With FBM, you handle everything yourself. When a customer places an order, you pack the item, ship it from your own location, and manage any customer service or returns. Amazon simply provides the marketplace — you handle the logistics.
The Key Differences
The most significant difference is the Buy Box. FBA sellers have a notable advantage in winning the Buy Box because Amazon trusts its own fulfilment network to deliver a reliable customer experience. If you are competing against an FBA seller on the same listing, winning the Buy Box with FBM is harder unless your price is significantly lower.
Prime eligibility is another major factor. FBA products automatically qualify for Prime, which matters because Prime members tend to filter for Prime-only results. With FBM, you can apply for Seller Fulfilled Prime, but the requirements are strict and not easy to meet.
When FBA Makes More Sense
FBA is generally the better option when you are selling small to medium-sized products with decent margins. The convenience of not handling individual orders is significant, especially if you are running your Amazon business alongside a full-time job. It also makes sense when you want to scale — processing 50 orders a day from your home is exhausting, but Amazon handles that volume without breaking a sweat.
When FBM Might Work Better
FBM can be the smarter choice for oversized or heavy items where FBA fees would eat into your margins. It also works for slow-moving inventory where monthly storage fees would add up, or for sellers who already have their own warehouse and fulfilment operation set up.
Some sellers also use FBM as a backup — if their FBA stock runs out, having an FBM listing keeps the product available while new stock is being sent in.
The Hybrid Approach
Many experienced sellers use both. They send their fast-moving, well-margined products to FBA for the Prime badge and Buy Box advantage, while fulfilling slower or bulkier items themselves. This hybrid approach lets you maximise the benefits of both models.
Cost Comparison
FBA fees include fulfilment fees, storage fees, and the standard referral fee. FBM avoids the fulfilment and storage fees but you absorb the cost of packaging materials, postage, and your own time. For many products, FBA works out cheaper once you account for discounted shipping rates and the increased sales from Prime eligibility.
The best approach is to run the numbers for your specific products using Amazon's FBA Revenue Calculator. Input your product details and compare the FBA and FBM scenarios side by side.
Which Should You Choose?
If you are just starting out and want the simplest path to your first sales, FBA is usually the way to go. The Prime badge, Buy Box advantage, and hands-off fulfilment make it easier to compete from day one. As you gain experience and understand your product economics better, you can always introduce FBM where it makes financial sense.
Whichever route you choose, getting your products prepped correctly is essential. At Precision, we prepare your stock to Amazon's exact standards so it is accepted into FBA without issues — saving you time and avoiding costly rejections.