FBA and FBM: 2026 Refresh

 Most published advice out there on FBA versus FBM is written for sellers who have no fulfillment capability of their own. FBA replaces infrastructure the seller does not have, so operationally comparison is made from that angle.

For an established manufacturer already servicing retail, B2B channels, foodservice, etc. that framing does not fit. If you own warehousing, have staff, carrier relationships using Amazon fulfillment is not about acquiring capability, but whether to hand off capacity you already have to Amazon That is a different decision, and today I want to focus on FBA vs. FBM with consideration of existing capabilities of an established manufacturer.

Why FBA usually wins

FBA main advantage is not about logistics, but about market position and visibility. Specifically:

1. Prime eligibility. FBA typically gets you the Prime badge, which increases conversion significantly (10-13% for FBM, while for FBA it’s up to 25%, listing quality being equal).

2. Featured Offer (Buy Box) share. Amazon treats FBA fulfillment as a proxy for reliable delivery, and FBA offers win the Featured Offer more frequently than FBM offers at equivalent price points.

3. Removal of customer service, returns, and access to Multi-Channel Fulfillment. FBA takes returns handling and customer service off your operation entirely, and gives you access to MCF, which lets Amazon-held inventory fulfill orders placed on other channels.

The visibility advantage is sizable, and usually outweighs the fee premium. The default assumption should be FBA.

What FBA costs

On average, all-in Amazon FBA fees excluding advertising consume roughly:

• 30%-38% of the selling price on a standard-size, mid-priced product in the $20 to $50 range

• 40%-55% percent below $20

• ~25% for products priced above $50

  
  The reason the percentage moves so much is worth understanding for a decision maker responsible for penciling in numbers: only the referral fee, which is around 15% percent for most categories, is genuinely variable and scales as a fixed percentage of price. Everything else, mainly the per-unit fulfillment fee, is a fixed dollar charge set by the product's weight and size tier, not its price. That fixed charge is the swing factor. A smaller number for a $45 product but can consume a third of a $12 one, which is why the same physical item is profitable at one price, and not at another.

  
  A few other smaller fees fall into the fixed-dollar bucket: low-inventory-level fee, the inbound placement fee, and the inbound defect fee are all set amounts rather than proportional to price. Storage fee is always there, but immaterial for well-turned standard-size inventory.

What FBM provides

FBM's advantages fall into three categories:

1. Cost structure. FBM removes Amazon-controlled fees I went through in the section above from your unit economics.

2. Control. Packaging, insert cards, and branded presentation stay with you. There are of course rules about inserts and brand information you put, but it doesn’t have the scrutiny and visibility like FBA.

3. Inventory unification. Because FBM inventory sits in your own facility or 3PL, a single pool serves Amazon, your DTC site, other marketplaces, and wholesale channels. It keeps inventory planning a lot more streamlined vs. having to plan for a separate Amazon-dedicated pool.

What FBM costs

The principal disadvantage is visibility. Without the Prime badge, listings are less visible to Amazon's highest-spending customer segment by default, so this becomes visibility and conversion drawback.

The second is that performance becomes your responsibility. On-time shipment rate, valid tracking rate, and order defect rate are all on you under FBM, and falling below Amazon's thresholds can result in listing suppression or account action. Since mid-2025, Amazon has also compared FBM delivery speed against competing offers,

How to decide

FBA costs more per unit and generally sells more units, which makes the fulfillment decision a contribution problem rather than a cost minimization problem. For most standard products on listings with resellers (shared Buy Box), the volume differential outweighs the cost differential.

Where FBM makes sense:

1. Heavy and oversized products. The FBA fulfillment fee rises steeply with size and weight, while the Prime badge conversion lift is smaller in these categories. The economics then favor FBM.

2. High-ticket items above $100 price point. Purchase deliberation is longer, buyers rely more heavily on reviews, brand comparison, and detailed content, and delivery speed carries less weight in the final decision. The Prime badge is still valuable here, but it becomes one factor among several rather than a decisive one.

3. Slow-moving SKUs. FBA storage fees and the aged inventory surcharge can consume the margin on products that do not turn quickly enough. FBM is often the cheaper answer regardless of the visibility argument.

4. Handling-sensitive products. Fragile items are almost always better on FBM, where you control packaging, temperature, and shipping standards.

THe most important here to mention is that FBA or FBM should not be a catalog-wide decision, especially for larger catalogs. FBA is great for standard-size, shared Featured Offer listings, faster-moving, hero SKUs. Visibility and. volume will drive the majority of contribution.

FBM is for exceptions I listed above, and as a backup for FBA-primary SKUs. So the decision is per SKU and per condition, not per catalog.

The decision worth revisting

Fulfillment decisions on Amazon are often made once, early, and never revisited. The 2026 fee structure, the AI-driven changes to how the catalog surfaces products, the shifts in reseller dynamics, and the changes to Amazon's own logistics offerings all mean that a decision that was correct in 2023 may not be correct today. A mid-year review of your fulfillment allocation is a healthy exercise, especially for a catalog that has not been reviewed in a while.

If you are working through the FBA and FBM decision for your catalog and need an expert perspective, that is one of the more productive conversations I have with CPG manufacturers. Reach out if it would be useful.

Saludos,

Irina