If you’re selling on Amazon, one of the most important decisions you’ll make is how to handle fulfillment. Amazon FBA and FBM are two distinct fulfillment models, each with different cost structures, operational demands, and strategic trade-offs. Understanding the difference between them is essential before you commit to either approach or try to combine both.
What are FBA and FBM on Amazon?
FBA stands for Fulfillment by Amazon, while FBM stands for Fulfillment by Merchant. With FBA, Amazon stores, picks, packs, and ships your products on your behalf. With FBM, you as the seller handle all of those logistics steps yourself, either directly or through a third-party logistics provider.
Both models allow you to list and sell products on Amazon’s marketplace, but the operational responsibility sits in very different places. FBA outsources the physical work to Amazon’s infrastructure, while FBM keeps that control with you. The right choice depends heavily on your product type, margins, volume, and operational capabilities.
How does FBA work for Amazon sellers?
With Amazon FBA, you ship your inventory in bulk to one or more of Amazon’s fulfillment centers. From there, Amazon takes over entirely. When a customer places an order, Amazon picks, packs, and ships the product, handles returns, and manages customer service related to delivery.
Sellers enrolled in FBA also gain access to Prime eligibility by default, which means their listings display the Prime badge and qualify for fast, free shipping. This can significantly improve conversion rates, as many Amazon shoppers filter specifically for Prime products.
The FBA process typically works like this:
- You prepare and label your products according to Amazon’s requirements
- You ship inventory to Amazon’s designated fulfillment centers
- Amazon stores your products in its warehouses
- When an order comes in, Amazon handles picking, packing, and shipping
- Amazon manages delivery-related customer service and returns
The trade-off is that you give up direct control over how your products are handled, and you pay fees for every step of the process.
How does FBM work for Amazon sellers?
With FBM, you list your products on Amazon but manage all fulfillment yourself. When a customer orders, you are responsible for packing and shipping the product within the promised delivery window, as well as handling any returns or delivery-related queries directly.
FBM gives you full control over your inventory, packaging, and the customer experience. You can ship from your own warehouse, a third-party logistics partner, or even a dropshipping supplier. Some sellers use FBM specifically because they want to include branded packaging or inserts that reinforce their identity.
The challenge with FBM is that you need reliable fulfillment infrastructure. If you miss shipping deadlines or receive poor seller feedback, your listing performance and Buy Box eligibility can suffer. Amazon holds FBM sellers to strict performance metrics, including order defect rate, cancellation rate, and late shipment rate.
What’s the difference in costs between FBA and FBM?
The key cost difference is that FBA involves Amazon’s fulfillment fees and storage fees on top of your standard selling fees, while FBM shifts those costs to your own logistics operation. Neither model is inherently cheaper – it depends on your product size, weight, storage duration, and sales velocity.
With Amazon FBA, you pay:
- Fulfillment fees per unit shipped, based on size and weight
- Monthly storage fees, which increase significantly in Q4
- Long-term storage fees if inventory sits unsold for extended periods
- Optional costs for prep services, labeling, and removal orders
With FBM, your costs include:
- Warehousing or storage costs (your own or a third party)
- Shipping and carrier costs per order
- Packaging materials and labor
- Returns handling
FBA tends to be more cost-effective for small, lightweight, fast-moving products. FBM often makes more sense for large, heavy, slow-moving, or oversized items where Amazon’s storage and fulfillment fees would erode margins quickly.
Which fulfillment method is better for your business?
Neither FBA nor FBM is universally better. FBA is generally the stronger choice for sellers who want scale, Prime visibility, and minimal operational involvement. FBM is better suited for sellers who need more control, have existing logistics capabilities, or sell products that are not cost-efficient to store in Amazon’s network.
Consider FBA if:
- Your products are small, lightweight, and sell quickly
- You want Prime eligibility without running your own fulfillment
- You are scaling volume and need Amazon’s infrastructure to absorb demand
- You lack the warehouse capacity or logistics team to fulfill orders yourself
Consider FBM if:
- Your products are large, heavy, or have low turnover rates
- You already have a reliable warehouse and shipping operation
- You want full control over packaging, branding, or delivery experience
- Your margins are too thin to absorb FBA fees
Many experienced Amazon sellers run profitability calculations for both models before committing, using Amazon’s own FBA revenue calculator as a starting point.
Can you use FBA and FBM at the same time?
Yes, you can use FBA and FBM simultaneously on Amazon, and many sellers do. This approach is often called a hybrid fulfillment strategy. You can even list the same product under both methods, which gives you a safety net if your FBA inventory runs out or gets delayed at a fulfillment center.
A hybrid strategy is particularly useful during peak seasons when FBA inventory limits can restrict how much stock you can send in. By keeping an FBM listing active, you can continue selling even when your FBA stock is depleted or under restriction.
Some sellers also use FBM selectively for products that perform poorly under FBA’s cost structure, while keeping their best-selling, high-velocity products enrolled in FBA to benefit from Prime eligibility and Amazon’s fast shipping network.
How Distrilink Helps You Navigate FBA and FBM
Choosing between FBA and FBM is rarely straightforward, and the wrong decision can cost you significantly in fees, lost sales, or operational complexity. At Distrilink, we help brands activate and scale on Amazon and other European marketplaces without having to build the entire operational infrastructure themselves.
Here is what we take off your plate:
- Fulfillment strategy: We assess your product catalog and margins to determine whether FBA, FBM, or a hybrid approach makes the most sense for your brand
- In-house warehouse and logistics: Our own fulfillment infrastructure gives you the flexibility to scale without being locked into Amazon’s storage constraints
- Marketplace activation and optimization: From account setup to listing optimization, we handle the full operational execution
- Centralized platform management: All your products and performance data are managed through our Distrilink Acceleration Platform across all connected marketplaces
- Customer service and returns: We manage delivery-related queries and returns so your team stays focused on the business
We represent more than 25 brands and are connected to all major European marketplaces. Instead of building a marketplace team, IT structure, and logistics operation from scratch, brands can activate and scale through us immediately, with speed, control, and clear insight into their performance. Get in touch with us to find out how we can help your brand grow on Amazon.
Frequently Asked Questions
How do I calculate whether FBA or FBM is more profitable for my specific product?
Start with Amazon's free FBA Revenue Calculator, which lets you input your product dimensions, weight, and selling price to compare estimated FBA fees against your own fulfillment costs. For a complete picture, factor in your warehousing costs, average shipping rates per order, packaging materials, and labor time. Many sellers find that running this calculation at the SKU level — rather than across their entire catalog — reveals that different products perform better under different models.
Can FBM sellers still win the Buy Box on Amazon?
Yes, FBM sellers can win the Buy Box, but it is generally more competitive than it is for FBA sellers, since Amazon tends to favor Prime-eligible listings. To maximize your Buy Box eligibility as an FBM seller, you need to maintain strong seller metrics — specifically a low order defect rate, a late shipment rate below 4%, and a cancellation rate under 2.5%. Competitive pricing and fast, reliable shipping speeds also play a significant role in Buy Box performance for FBM listings.
What happens to my FBM sales if I can't fulfill an order on time?
Missing a shipment deadline as an FBM seller directly impacts your seller performance metrics, which Amazon monitors closely. A high late shipment rate can suppress your Buy Box eligibility, reduce your listing visibility, and in severe cases lead to account suspension. To protect yourself, always set realistic handling times in your listings, work with reliable carriers, and have a contingency plan — such as an active FBM backup listing — for periods of high demand or operational disruption.
Are there product categories where FBM is almost always the better choice?
Yes — oversized, heavy, or bulky products (such as furniture, large appliances, or industrial equipment) are often poor fits for FBA due to the disproportionately high fulfillment and storage fees Amazon charges for these size tiers. Similarly, slow-moving or seasonal products with low sales velocity tend to accumulate long-term storage fees in Amazon's warehouses, making FBM a more cost-efficient option. Perishable goods, fragile items requiring special handling, and products with strict expiry date management are also often better handled through FBM or a specialist 3PL.
What is Seller Fulfilled Prime, and is it a good alternative to FBA?
Seller Fulfilled Prime (SFP) is a program that allows FBM sellers to display the Prime badge on their listings by meeting Amazon's strict delivery speed and reliability requirements — typically same-day or next-day shipping. It offers the best of both worlds in theory: Prime visibility without sending inventory to Amazon's fulfillment centers. However, SFP has demanding eligibility criteria and requires a highly efficient in-house or 3PL logistics operation, making it a realistic option only for sellers with mature, well-resourced fulfillment capabilities.
How should I manage inventory if I'm running a hybrid FBA and FBM strategy?
The key to a successful hybrid strategy is maintaining clear inventory visibility across both channels and setting appropriate stock thresholds that trigger restocking actions. Keep your FBM stock buffer separate from your FBA shipments to avoid overselling, and configure your FBM listing to activate automatically when FBA inventory drops below a defined level. Tools like inventory management software (e.g., Linnworks, Skubana, or Veeqo) can help automate these triggers and sync stock levels across fulfillment methods in real time.
What are the most common mistakes new Amazon sellers make when choosing between FBA and FBM?
The most frequent mistake is defaulting to FBA without running a proper profitability analysis, which often leads to margin erosion — especially for heavier or slower-moving products. Another common error is underestimating the operational demands of FBM, such as meeting Amazon's strict shipping deadlines and handling customer service at scale. Finally, many sellers overlook the hybrid approach entirely, missing an opportunity to optimize costs and maintain sales continuity during inventory disruptions or peak-season FBA restrictions.
