Amazon FBA vs FBM: the right answer is usually per product
Amazon FBA vs FBM is the choice between letting Amazon store, ship and handle customer service, or doing it yourself. Amazon's own advice is that many sellers use both, product by product. This guide compares costs, Prime, control and performance rules, and gives a method to decide for each product.
Key takeaways
- FBA outsources storage, packing, shipping, customer service and returns to Amazon; FBM keeps all of it with you.
- FBA gives the Prime badge and, Amazon says, better chances at the Featured Offer; FBM reaches Prime only through Seller Fulfilled Prime.
- FBA costs are per unit and per month of storage; FBM costs are your own labels, packing, space and labor, cheaper through Buy Shipping.
- Seller fulfilled orders carry Amazon's performance targets, such as an order defect rate under 1% and late shipment rate under 4%.
- Amazon suggests small, light, fast selling products suit fulfillment best; heavy, bulky, slow or custom products often suit FBM.
Amazon FBA vs FBM: the short answer
Amazon describes the difference simply: FBA lets you outsource the entire fulfillment process, while with Fulfilled by Merchant you manage the fulfillment tasks yourself. FBA is more hands-off; FBM gives you more control from beginning to end. You can use one method for all eligible products or combine them, and Amazon notes that many sellers choose per product.
So the useful question is not which is better in general, but which is better for a given product. Size, weight, how fast it sells, how much it needs a personal touch, and whether Prime would lift its sales usually settle it.
| Choose FBA when | Choose FBM when |
|---|---|
| The product is small, light and sells steadily | The product is heavy, bulky or sells slowly |
| Prime delivery would lift conversion | You already ship fast and reliably, or qualify for Seller Fulfilled Prime |
| You want Amazon to handle customer service and returns | You want your own packaging, inserts or personal touch |
| You have no warehouse or packing staff | You run a warehouse or sell on several channels already |
| The product meets FBA's product rules | The product is restricted from FBA, or temperature sensitive |
The differences between FBA and FBM
| FBA | FBM | |
|---|---|---|
| Storage | Amazon's fulfillment centers | Your own space, or a partner's |
| Picking, packing, shipping | Amazon | You |
| Customer service and returns | Amazon | You |
| Prime badge | Yes | Only through Seller Fulfilled Prime |
| Costs | Fulfillment fee per unit, monthly storage, other FBA costs | Labels, packaging, space and labor |
| Performance metrics | Amazon's fulfillment | Your order defect, late shipment, cancellation and tracking rates |
| Product rules | FBA product restrictions apply | No FBA restrictions; normal selling rules apply |
| Access to inventory | Through removal orders | Any time |
For how each works step by step, see our guides to how Amazon FBA works and Amazon FBM. This guide focuses on choosing between them.
Five factors Amazon says decide it
Amazon's FBA vs FBM guide names five factors. Its general advice is to start with small, lightweight products with high inventory turnover and high margins, whichever method you use, because heavy or bulky products, sporadic sellers and low margin items can be harder to fulfill profitably.
| Factor | Leans FBA | Leans FBM |
|---|---|---|
| Type of product | Items that need safe, standard packing | Small items you can pack easily, or items FBA restricts |
| Personalization and time | You would rather spend time on the business | You want particular packaging or a handwritten note |
| Inventory management | No space, or no need for constant access | You need 24/7 access or special storage such as climate control |
| Customer service and returns | Amazon handles them | You prefer to deal with customers directly |
| Sales volume and velocity | Large, regular volumes | Small, seasonal or sporadic sales you can ship yourself |
FBA vs FBM costs: a worked comparison
Amazon says FBA uses a pay-as-you-go model with storage and fulfillment costs per unit and per order, while FBM costs depend on your own processes and carriers. The only fair comparison is per product. Take an illustrative 1.5 lb product selling for $30, with a referral fee of $4.50 either way.
| Cost per order | FBA, illustrative | FBM, illustrative |
|---|---|---|
| Referral fee | $4.50 | $4.50 |
| Fulfillment | $5.40 FBA fee, plus 3.5% surcharge: $5.59 | $6.80 label through Buy Shipping |
| Packing materials and labor | Included | $1.80 |
| Storage | $0.15 share of monthly FBA storage | $0.20 share of your own space |
| Inbound to Amazon | $0.40 | None |
| Total | $10.64 | $13.30 |
These numbers are illustrative, not Amazon's rates for any size tier; the 3.5% is Amazon's fuel and logistics surcharge on FBA fulfillment fees from April 17, 2026. The table leaves out what often decides it: the Prime badge's effect on conversion, and your own time. Amazon's Revenue Calculator compares FBA with your own fulfillment for a real product, and our ACoS calculator adds advertising to the margin.
Prime, the Featured Offer and conversion
The Prime badge is FBA's biggest advantage. Amazon says it tells customers a product is eligible for fast, free shipping through Prime, and that using FBA to deliver with speed and reliability improves your chances of winning the Featured Offer, alongside competitive pricing.
FBM sellers can earn the badge through Seller Fulfilled Prime, but the bar is high: a 30 day trial, then at least 93.5% on-time delivery, 99% valid tracking and a cancellation rate of 0.5% or less, plus weekend operations and free standard shipping. For most new sellers, FBA is the realistic route to Prime.
Performance metrics: who carries the risk
With FBM, Amazon measures your fulfillment. Its Order Performance policy requires an order defect rate under 1%, a cancellation rate under 2.5%, a late shipment rate under 4% and a valid tracking rate over 95% for seller fulfilled orders, and it can restrict selling privileges when you miss them. Amazon's order defect rate page says the metric only applies to seller fulfilled orders.
With FBA, Amazon ships the orders, so late shipments and tracking are not your metrics. You still carry account health for listings, policy and customer feedback, but the day to day shipping risk moves to Amazon.
| Metric | FBM target | FBA |
|---|---|---|
| Order defect rate | Under 1% | Applies only to seller fulfilled orders |
| Late shipment rate | Under 4% | Amazon ships |
| Cancellation rate | Under 2.5% | Seller cancellations apply to FBM orders |
| Valid tracking rate | Over 95% | Amazon ships with tracking |
FBA or FBM by product type
| Product | Usually | Why |
|---|---|---|
| Small, light, fast selling | FBA | Low size tier fees, quick turnover, Prime lift |
| Under $10 | FBA, often | Amazon offers Low-Price FBA rates for low priced products |
| Heavy or bulky | FBM, often | Amazon names heavy and bulky items as FBM candidates |
| Slow moving | FBM | Avoids monthly storage and aged inventory costs |
| Temperature sensitive | FBM | Some cannot be sold through FBA |
| Custom or personalized | FBM | Made to order, with your own packaging |
| Seasonal | Either | FBA for the peak if stock sells through; FBM for small runs |
The same seller can land on different answers for different products, which is why Amazon suggests deciding per product. Our FBA inventory consulting service runs this comparison across a whole catalog.
Using FBA and FBM together
Amazon says you can use FBA, FBM or both to meet your fulfillment needs. The common hybrid setups follow the factors above: FBA for fast sellers and FBM for slow or bulky ones, or FBM as a backup when FBA stock runs low or a shipment is delayed.
Related services widen the options. Multi-Channel Fulfillment uses your FBA stock for orders from your own website and other channels, Seller Fulfilled Prime brings the Prime badge to FBM, and Buy with Prime puts the Prime logo and delivery promise on your own site; Amazon says it has increased conversions by an average of 25%.
When to switch a product between FBA and FBM
| Signal | Consider |
|---|---|
| Aged inventory surcharges building up | Moving slow units to FBM or removing them |
| Storage fees rising in peak months | Holding less in FBA through the season |
| Losing the Featured Offer to Prime offers | Moving the product to FBA |
| Late shipments or tracking problems on FBM | FBA, or fixing handling times and using Buy Shipping |
| FBA capacity limits blocking restocks | FBM for overflow |
| Heavy item with high FBA fees | Pricing both in the Revenue Calculator |
Amazon's FBA Enrollment Opportunities tool also estimates the sales lift for products you currently fulfill yourself if you moved them into FBA, which is a useful first check before switching.
Mistakes in the FBA vs FBM decision
One method for everything
Amazon suggests deciding per product; catalogs usually need both.
Comparing fees, not margins
Include the Prime effect on conversion, and your own time.
Ignoring FBM metrics
Seller fulfilled orders carry Amazon's defect, late and tracking targets.
Heavy items in FBA by default
Bulky products can cost more in FBA than shipped yourself.
Slow sellers left in FBA
Storage and aged inventory costs grow the longer units sit.
No backup plan
An FBM offer can keep a product selling when FBA stock runs out.
If you ship with a supplier instead, see our guide to Amazon dropshipping. For a second opinion on your own catalog, our Amazon consulting service compares both methods product by product.
Amazon FBA vs FBM: FAQ
What is the difference between FBA and FBM?
With FBA, Amazon stores your inventory and handles packing, shipping, customer service and returns. With FBM, you store and ship orders yourself and handle customer service.
Is FBA or FBM better?
It depends on the product. Amazon suggests FBA for small, light, fast selling items and says heavy, bulky, slow or custom products often suit FBM. Many sellers use both.
Is FBA more expensive than FBM?
Not necessarily. FBA charges fulfillment and storage fees; FBM costs labels, packing, space and labor. Compare a specific product in Amazon's Revenue Calculator.
Do FBM products get the Prime badge?
Only through Seller Fulfilled Prime, which requires a 30 day trial and targets such as 93.5% on-time delivery and 99% valid tracking.
Does FBA help win the Featured Offer?
Amazon says using FBA to deliver with speed and reliability can improve your chances of winning the Featured Offer, along with competitive pricing.
Can I use FBA and FBM at the same time?
Yes. Amazon says you can use one method or a combination, per product.
Which performance metrics apply to FBM?
Order defect rate under 1%, cancellation rate under 2.5%, late shipment rate under 4% and valid tracking rate over 95%, among others.
Is FBA worth it for heavy items?
Sometimes not. Amazon names heavy and bulky items among the products sellers often fulfill themselves; compare both methods for the specific item.
What changed in FBA costs in 2026?
FBA fees rose by an average of $0.08 per unit on January 15, 2026, and Amazon added a 3.5% fuel and logistics surcharge on fulfillment fees from April 17, 2026.
How do I decide for a specific product?
Run it through the Revenue Calculator for both methods, then weigh the Prime effect, your time, storage needs and how fast it sells.
Sources
- Amazon FBA vs FBM: which is right for you?, Sell on Amazon blogLast verified September 24, 2026.
- Amazon FBM (Fulfilled by Merchant), Sell on AmazonLast verified September 24, 2026.
- Order Performance program policy, Seller Central helpLast verified September 24, 2026.
- Order Defect Rate, Seller Central helpLast verified September 24, 2026.
- Fees for Remote Fulfillment with FBA, including the 2026 surcharge, Seller Central helpLast verified September 24, 2026.
- Seller Fulfilled Prime performance requirements, Seller Central helpLast verified September 24, 2026.
Get a free FBA vs FBM check for one product
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See the FBA inventory consulting service