Amazon FBA vs FBM: Fees and Profit Compared (2026)

By the Profitvana Editorial Team · Updated September 2026

Every Amazon seller chooses how orders get fulfilled: Fulfillment by Amazon (FBA) or Fulfilled by Merchant (FBM). The referral fee is the same either way — the real difference is in fulfillment costs.

The referral fee applies to both

Whether you use FBA or FBM, Amazon charges a referral fee on each sale — 15% in most categories, with published exceptions such as 8% on consumer electronics and personal computers, 8% on grocery items under $15, 5% on jewelry over $250 and 45% on Amazon device accessories. It is charged on the total the buyer pays including shipping, and it is identical for both fulfilment methods, so it never decides the choice. The subscription is the same too: $39.99 a month on the Professional plan or $0.99 per item on the Individual plan, whichever way you ship.

FBA: what Amazon charges to fulfil for you

With FBA you ship inventory to Amazon's warehouses and Amazon picks, packs, ships and handles customer service and returns. You pay a per-unit fulfilment fee set by the item's size tier and shipping weight — at 2026 rates roughly $3.06 for a small standard item under 4 oz, about $4.76 for a large standard item around one pound, and $9–10 for a two-to-three-pound item, with large bulky and extra-large tiers running far higher. Apparel carries slightly higher fees, and items under $10 get a reduced Low-Price FBA rate.

On top of that come monthly storage fees per cubic foot (higher from October to December), aged-inventory surcharges on units stored more than 180 days, an inbound placement fee unless you split shipments across regions, and the cost of shipping stock to Amazon in the first place. The upside is the Prime badge, Buy Box eligibility and delivery speed, which for most standard products raises conversion enough to pay for the fees.

FBM: what you pay to fulfil yourself

With FBM you store stock and ship each order yourself. You avoid FBA fulfilment, storage, aged-inventory and inbound fees entirely; you pay the referral fee, your own postage and packaging, and your time. Amazon's Buy Shipping lets FBM sellers buy discounted carrier labels inside Seller Central, and Seller Fulfilled Prime — which lets FBM orders carry the Prime badge — is open to sellers who can meet its delivery-speed and performance requirements.

FBM suits large, heavy or oversized products where FBA fees balloon, slow sellers that would rack up storage and aged-inventory charges, fragile or regulated items Amazon handles poorly, and sellers who already run a warehouse or use a third-party logistics provider for other channels.

A worked comparison

Take a $30 product weighing 12 oz in a standard category, sold on the Professional plan at 200 units a month. Both routes pay the same $4.50 referral fee (15%). FBA adds about $4.20 in fulfilment plus roughly $0.30 per unit in monthly storage — about $4.50 total. FBM costs a $5.50 carrier label through Buy Shipping plus $0.60 packaging and, say, $1.00 of labour per order — about $7.10. Here FBA is cheaper and gets the Prime badge. Change the product to a 6-pound, $80 item and the picture flips: FBA's large-standard fee near $10 plus storage against FBM's $9 label leaves FBM slightly ahead before the Prime effect, and comfortably ahead once storage of a slow-moving line is counted.

$30 item, 12 oz, 200/mo	FBA	FBM
Referral fee (15%)	$4.50	$4.50
Fulfilment / postage	≈ $4.20	≈ $5.50
Storage or packaging + labour	≈ $0.30	≈ $1.60
Total per unit	≈ $9.00	≈ $11.60

Which is more profitable?

There is no universal winner. Small, light, fast-moving products almost always win with FBA: the fulfilment fee is low, storage is brief, and the Prime badge lifts sales. Large, heavy, slow or fragile items usually win with FBM because storage and oversized fulfilment fees dominate. Many sellers run both — FBA for their best sellers, FBM as a backup when FBA stock runs out and for the long tail.

To compare your own product, estimate the referral fee in our Amazon calculator and enter the per-unit FBA fee or your self-ship cost into the item-cost field to see the net profit each way; the FBA profit calculator does the full FBA side including storage.

Frequently asked questions

Is FBA or FBM cheaper?

It depends on the product. Small, light, fast-moving items usually win with FBA (low fulfillment fee plus the Prime sales boost). Large, heavy, or slow-selling items usually win with FBM because you skip storage and fulfillment fees.

Does Amazon's referral fee differ between FBA and FBM?

No — the referral fee (typically ~15%, ranging 8–20% by category) is charged on every sale regardless of fulfillment method. Only the fulfillment costs differ.

What extra fees does FBA add?

A per-unit fulfillment fee based on size and weight, plus monthly storage fees — and long-term storage surcharges on inventory that sits too long.

Can FBM orders get the Prime badge?

Yes, through Seller Fulfilled Prime, if you meet Amazon's delivery-speed, on-time and cancellation requirements. It is demanding, which is why most Prime-badged listings are FBA.