FBA vs FBM: Which is Right for Your Brand in 2026?

What is FBA?

FBA stands for Fulfillment by Amazon. Here's how it works: you send your inventory to Amazon's fulfillment centres, and Amazon handles everything from there, storage, picking, packing, shipping, returns processing, and customer service.

When a customer orders your product, Amazon's warehouse team picks it off the shelf, packs it, and ships it, often with next-day or same-day delivery through Prime. Your product gets the Prime badge, which significantly increases conversion rates.

The costs break down into three main categories:

• Fulfillment fee, a per-unit fee based on the item's size and weight, typically $3.00–$6.00 for standard-size items and $8.00–$40.00+ for oversized items
• Monthly storage fee, charged per cubic foot of warehouse space your inventory occupies ($0.87–$2.40/cubic foot depending on the time of year)
• Long-term storage fee, additional charges on inventory stored over 181 days ($6.90/cubic foot or $0.15/unit, whichever is greater)

For most standard-size products with healthy margins, FBA is the default choice. The Prime badge alone can increase sales by 20–30%, and the logistics savings offset the fees for many sellers.

What is FBM?

FBM stands for Fulfillment by Merchant. You list your products on Amazon, but when an order comes in, you handle everything, storing inventory in your own warehouse (or a third-party logistics provider), packing orders, shipping to customers, and managing returns and customer service.

You don't pay Amazon's fulfillment or storage fees, but you take on the costs yourself: warehouse space, packing materials, shipping labels, staff time, and customer service resources.

FBM listings are not automatically eligible for Prime (though Seller Fulfilled Prime exists for sellers who meet Amazon's strict delivery standards). This means FBM listings typically have lower conversion rates than FBA listings. But the margin per unit can be higher because you're not paying Amazon's fees.

FBM makes the most sense when you already have fulfillment infrastructure in place, when your products are too large or heavy for FBA to be cost-effective, or when your margins are too thin to absorb Amazon's per-unit fees.

FBA vs FBM: the full comparison

Neither model is universally better. The right choice depends entirely on your specific products, margins, and operational setup.

When to choose FBA

FBA is typically the right choice when:

• Your products are small to medium-sized with healthy margins. The fulfillment fees are reasonable and the Prime badge drives enough additional sales to justify the cost
• You don't have warehouse infrastructure, FBA eliminates the need for your own storage, packing stations, and shipping setup
• You want the Prime badge, for competitive categories, Prime eligibility can be the difference between winning and losing the Buy Box
• You sell seasonal products, use FBA during peak season for the volume and speed, then remove inventory before long-term storage fees kick in
• You're just starting out, FBA removes the logistics complexity so you can focus on product selection, marketing, and growth

When to choose FBM

FBM makes more sense when:

• Your products are large or heavy, FBA fees for oversized items can be $20–$40+ per unit, making it prohibitively expensive
• You already have warehouse infrastructure, if you're already paying for storage and shipping, adding FBA fees on top doesn't make sense
• Your margins are very tight, for products priced under $10–$15, FBA fees can eat most or all of your profit
• You sell custom or personalised products, items that need to be customised before shipping can't be stored in Amazon's warehouses
• You sell perishable goods, products with short shelf lives need more control than FBA provides

The hybrid approach

Many of the most successful Amazon sellers don't choose between FBA and FBM, they use both. The hybrid approach uses FBA for your top sellers (where the Prime badge drives significant additional revenue) and FBM for products where FBA doesn't make financial sense.

A typical hybrid strategy looks like this:

• FBA for your top 20% of products, these are your fastest sellers with healthy margins. The Prime badge increases velocity, and the volume justifies the fees
• FBM for long-tail products, slower sellers that would accumulate long-term storage fees in FBA
• FBM for oversized items, where FBA fulfillment fees would destroy margins
• FBM as a backup, keep FBM listings active for your FBA products so you continue selling if FBA stock runs out

Managing a hybrid model requires more operational oversight, you're tracking inventory across both Amazon's warehouses and your own. This is where automation becomes essential.

How to automate FBA and FBM operations

Regardless of which fulfillment method you choose, the operational tasks are the same, monitoring inventory levels, tracking orders, managing returns, and reporting to your team. Automation works for both models.

With Jarvio, you can monitor FBA stock levels and FBM order status in the same workflows. Set up automated alerts when FBA inventory drops below your restock threshold. Track FBM shipping performance to ensure you're meeting Amazon's delivery expectations. Get daily reports that combine data from both fulfillment channels into a single summary.

Example agent conversations:

• "Show me my FBA inventory levels for all products"
• "Which FBM orders shipped late this week?"
• "Compare my margins on FBA vs FBM products this month"

The fulfillment method matters, but the monitoring and reporting layer is the same. Automate it once and it works regardless of how you ship.