FBA vs FBM: Which e-commerce fulfillment option is right for you?

You’ve done the hard yards: refined your product, got your Amazon store looking just the way you want, and the orders have started rolling in. Now the question is how you actually get those orders to your customers? More importantly, should Amazon be the one doing it?

Anyone selling on Amazon has two main options. The first is Fulfillment by Amazon (FBA), which means you hand off storage, packing, and shipping entirely to them.

Fulfillment by Merchant (FBM) means you control the fulfillment yourself, either directly or through an external logistics partner (3PL or 4PL).

Neither is universally better. The right answer depends on your product, your margins, and how much control you want over your own operations.

This guide breaks down exactly how each model works, where each one earns its keep, and how to make the call for your business.

FBA vs FBM: which is right for your business? TL;DR:

• FBA means Amazon handles storage, picking, packing, shipping, and returns. Your products become Prime-eligible. You pay for that convenience through fulfillment fees and storage charges.
• FBM means you (or a logistics partner) handle fulfillment. You keep more control, avoid some Amazon fees, and aren’t subject to Amazon’s operational rules.
• FBA suits fast-moving, lightweight products where Prime eligibility drives conversions. FBM suits heavier items, slower movers, or sellers who need more flexibility.
• A hybrid model — FBA for core SKUs, FBM for the rest — is increasingly common and often the smartest approach.  
• Neither model locks you in. Many sellers use both. 

Explore more: See how Wayfindr manages end-to-end logistics for growing brands

What Is FBA (Fulfillment by Amazon)?

FBA is Amazon’s in-house fulfillment program. You send your inventory to Amazon’s warehouses, and they take it from there. When an order comes in, Amazon picks, packs, and ships it. 

They also handle customer service and returns on your behalf. In exchange, your products become eligible for Amazon Prime, meaning customers get free two-day (or faster) delivery.

The program launched in 2006 and is now the dominant fulfillment method on the platform. According to Jungle Scout’s 2024 State of the Seller Report, around 82% of active Amazon sellers use FBA, either exclusively or as part of a hybrid setup.

The fee structure has two main components: a fulfillment fee that covers picking, packing, and shipping, and a monthly storage fee based on how much space your inventory takes up. Understanding how these fee types stack up is essential before committing to the model.

As of 2025, standard-size off-peak storage runs at $0.78 per cubic foot per month, jumping to $2.40 during Q4 peak months (October through December), per Amazon Seller Central’s current FBA fee schedule.

What Are the Advantages of FBA?

The biggest draw is Prime. Analyst estimates from Statista and CIRP put global Prime subscribers at around 220 million as of 2025, and Prime members spend significantly more per year on the platform than non-members.

Having the Prime badge on your listing definitely brings some positives. A meaningful share of Prime shoppers filter specifically for Prime-eligible products, which affects both visibility and conversion rate before a customer has even looked at your listing properly.

Beyond shipping speed, FBA takes customer service and returns off your plate entirely. For sellers who want a lean operation — especially those early in their Amazon journey — that’s a real advantage. You can focus on sourcing and marketing while Amazon handles the operational overhead.

FBA also improves your chances of winning the Buy Box — the ‘Add to Cart’ button that drives the vast majority of Amazon purchases. When multiple sellers offer the same product, Amazon’s algorithm decides who gets it, and it tends to favour FBA listings when other factors are comparable.

RELATED: FBA Sellers: Things You Should Know Before Placing Your First Inventory Order

What Are the Disadvantages of FBA?

The fees add up fast. Beyond the headline fulfillment and storage rates, FBA has introduced a growing list of additional charges in recent years: an inbound placement service fee (introduced March 2024), a low inventory level fee for sellers who don’t maintain sufficient stock, and a returns processing fee for categories with high return rates.

For lower-margin products or slower-moving inventory, these extras can erode profitability significantly.

There’s also the commingling issue, which doesn’t get enough attention. Amazon’s warehouses pool inventory from multiple sellers of the same product together. That speeds things up operationally, but it means a customer could receive a unit from a different seller’s stock.

If that stock has quality issues or is counterfeit, it reflects on your listing. You can opt out through Amazon’s labelling requirements, but that adds prep work on your end.

Then there’s the question of channel fit. FBA only fulfils Amazon orders. If you’re also selling through your own website, Shopify, or other marketplaces, you’ll need a separate logistics solution for everything outside Amazon.

That means two systems, two sets of costs, and more moving parts to manage.

The last constraint is control. With FBA, you’re inside Amazon’s system. You can’t inspect your warehouse, adjust processes on the fly, or move inventory quickly when circumstances change. That’s fine when the status quo is working for you. However, it can be a problem when Amazon’s policies shift, forcing you to shift with them whether you like it or not.

What Is FBM (Fulfillment by Merchant)?

FBM is the alternative: you list on Amazon, but handle fulfillment yourself. That could mean shipping from your own warehouse, or it could mean working with a third-party logistics provider (3PL or 4PL) who manages storage and dispatch on your behalf.

FBM is the default starting point for many new Amazon sellers, since FBA requires inventory to be physically sent to Amazon’s warehouses and approved before going live. It’s also increasingly common as a strategic choice, not just a fallback. According to Jungle Scout’s 2024 data, around 34% of sellers incorporate FBM into their fulfillment strategy in some form.

What Are the Advantages of FBM?

Control and flexibility are the key benefits of this approach. With FBM, you choose how and where your orders are stored, which carriers you use, and which channels you use to sell your products. This might seem like more work than you want, but wait until you’re selling into multiple markets on three different platforms, and you’ll begin to see why this matters.

The cost structure is also different. FBM lets you pay only for the services you actually use in a given month, rather than Amazon’s bundled fee model. For products that sell slowly or sit in storage for extended periods, this can be meaningfully cheaper.

Because you’re managing fulfillment independently, you can also serve customers across multiple channels, such as your own website or other marketplaces, without routing everything through Amazon’s network. That flexibility is increasingly important for many growing businesses.

There’s a resilience argument here, too. Sellers who rely entirely on FBA have no fallback when Amazon’s fulfilment network has problems, or when their policy changes in a way that you don’t like. Supply chain resilience is built by distributing risk, not concentrating it in a single provider.

What Are the Disadvantages of FBM?

The main trade-off is that FBM products aren’t automatically Prime-eligible. There is a Seller Fulfilled Prime (SFP) programme that lets sellers display the Prime badge while shipping from their own facilities, but it requires meeting strict delivery performance standards that most smaller operations find difficult to sustain.

Without Prime, you’re competing on a different footing. Some customers won’t look at non-Prime listings at all, and the Buy Box algorithm is harder to win. You also take on more operational responsibility: if something goes wrong with a shipment or a return, that’s your problem to solve.

The right FBM setup — particularly one that can match FBA’s fulfilment speed — requires a capable logistics partner, like a 3PL or 4PL. Some sellers also use a hybrid model, which gives them the best of both worlds, but that requires more coordination.

FBA vs FBM: How Do They Compare?

FBA or FBM: How Do You Choose?

The decision of which fulfillment model to use usually comes down to three variables: your product economics, your sales velocity, and how much you value operational independence. The last point can change significantly as your business grows.

Choose FBA if: your products are small, lightweight, and sell quickly; Prime eligibility is driving a significant share of your conversions; you want Amazon to handle customer service and returns; and your margins can absorb the fee structure without being squeezed.

Choose FBM if: your products are heavy, oversized, or slow-moving (where FBA’s storage fees stack up fast); you’re selling across multiple channels and need more flexibility; you want to inspect fulfilment quality directly; or you need to react quickly to changes without Amazon’s constraints getting in the way.

Choose a hybrid model if: you have a range of SKUs with different characteristics; you want Prime eligibility on your core products while managing the rest more cost-effectively; or you want a fallback in case FBA supply chains hit constraints. 

Hybrid models are increasingly the default for established sellers. According to Jungle Scout’s 2024 data, 22% of Amazon sellers already use both FBA and FBM simultaneously. 

The hybrid approach also provides a practical safety net. If your FBA inventory runs out, an active FBM listing on the same ASIN (Amazon Standard Identification Number) keeps orders flowing. Stockouts happen — especially during peak season — and having a fallback costs less than losing the sale.

Related Reading: FBA Sellers – Things You Should Know Before Placing Your First Inventory Order

What About FBA vs FBM For International Amazon Sellers?

For brands selling into the US from overseas — or scaling across multiple Amazon marketplaces simultaneously — the FBA vs FBM question gets considerably more complex.

FBA requires inventory to be physically located inside Amazon’s fulfilment network in each market before orders can ship. That means you need to get your products to the US, UK, EU, and anywhere else you’re selling. If you’re selling into three, four, or five different regions, it starts becoming inefficient.

It also means your stock is locked inside Amazon’s system. If demand shifts, a product underperforms, or you want to redirect inventory to your own website or another marketplace, you can’t do it quickly. You’re working around Amazon’s rules rather than running your own operation.

One option is to employ a capable third-party logistics (3PL) provider, as they specialize in end-to-end fulfillment. However, 3PLs can also have hard limits in terms of the regions they cover and/or capacity, so if you’re selling in several markets, you could find yourself working with several 3PLs.

That’s where a 4PL adds real value. They use a “control tower” model of logistics, coordinating multiple other 3PLs, warehouses, shipping agents, and carriers on your behalf. You get one point of contact for your entire supply chain, all around the world.

Final Thoughts

FBA and FBM aren’t competing options — they’re tools, and most serious Amazon sellers end up using both. The real question isn’t which one to pick. It’s whether your fulfilment setup is actually built around your business, or whether your business is quietly being built around your fulfilment setup.

FBA works well for Amazon-only businesses. FBM, with the right partner behind it, comes into its own as your business grows. When multiple sales channels and markets are part of your operation, you should consider a more flexible and comprehensive logistics setup. 

Wayfindr is the tech-enabled 4PL logistics partner helping global brands scale effortlessly. Get in touch if you want to talk through what the right setup looks like for your business.