For most wholesale food brands, the question of whether to sell on Amazon is no longer real. Customers are already searching for your products. The real question is how. The two paths Amazon offers, Fulfillment by Amazon (FBA) and Fulfillment by Merchant (FBM), have radically different cost structures, operational requirements, and conversion implications. For a brand built around pallets, cases, and wholesale distribution, the math is rarely intuitive.
Here is the actual comparison, with real numbers and no marketing fog.
The basic difference
FBA (Fulfillment by Amazon). You ship inventory in bulk to Amazon's fulfillment centers. Amazon stores, picks, packs, and ships individual orders to customers. Your products are eligible for the Prime badge and Prime delivery promises.
FBM (Fulfillment by Merchant). You list products on Amazon, but you ship every individual order yourself. Amazon never holds your inventory. Your products do not display the Prime badge unless you qualify for the much harder Seller Fulfilled Prime program.
For a wholesale food brand built around case-pack distribution, both options require operational changes. They are different changes, with different costs.
FBM costs for canned and jarred food
Let's price a representative product. A 25 oz can of menudo. Wholesale list price around $11. Weighs roughly 2 pounds with packaging. You ship it FBM from your warehouse direct to consumer.
Costs per unit:
- Small-parcel shipping for a 2-pound box, zone 5, one of the major carriers: $7 to $10
- Packing materials (box, void fill, tape): $0.50 to $1
- Labor for individual pick-and-pack at DTC speed: $1.50 to $3 depending on warehouse setup
- Amazon referral fee on the sale (15% on grocery): $1.80
Total fulfillment cost: roughly $11 to $16 per unit shipped.
On a $12 retail price, you are likely shipping FBM at a loss before account-level overhead.
The other FBM cost that does not show up in spreadsheets is account health risk. Amazon expects FBM sellers to ship within 1 to 2 business days. Late ship rate above 4% triggers warnings. Repeated misses lead to listing suppression. For a wholesale operation built around weekly truck schedules, this rhythm is a structural mismatch.
FBA costs for canned and jarred food
Same product. Same wholesale cost. Now you ship it via FBA.
Costs per unit:
- Amazon FBA fulfillment fee for a 2-pound grocery item: $3 to $5
- FBA inbound shipping (your inventory to Amazon's facility), per-unit allocated: $0.50 to $1
- FBA prep labor, per unit (polybag, FNSKU label, case pack): $0.50 to $1.50 if done in-house
- Storage fees, allocated per unit assuming 90-day average storage: $0.20 to $0.60 in Q4
- Amazon referral fee on the sale (15% on grocery): $1.80
Total fulfillment cost: roughly $5 to $10 per unit sold.
That is meaningfully better than FBM. But the FBA model imposes prep labor and inventory planning costs that wholesale operations are not built for.
The hidden cost: Prime eligibility
The cost comparison above looks at fulfillment math. The bigger story is conversion.
FBA listings display the Prime badge. FBM listings do not. Across grocery and food categories on Amazon, a Prime-eligible listing typically converts 30 to 50 percent better than an equivalent non-Prime listing. Amazon's algorithm also gives Prime-eligible products a meaningful boost in organic search rank.
So the FBM cost analysis is incomplete unless you also discount the conversion penalty. A product that costs $4 less per unit to fulfill via FBM but converts 40 percent worse will, in most cases, generate less total revenue per impression.
For canned and jarred goods specifically, where buyers expect Prime delivery on consumables, the conversion gap tends to run on the higher end of that range.
The break-even math
Set aside Prime conversion impact for a moment. Just on cash fulfillment cost per unit:
| Cost per unit shipped | FBM | FBA |
|---|---|---|
| Amazon referral fee | $1.80 | $1.80 |
| Fulfillment + prep labor | $1.50 to $3.00 | $0.50 to $1.50 |
| Shipping or fulfillment fee | $7 to $10 (parcel) | $3 to $5 (FBA fee) |
| Storage | none | $0.20 to $0.60 |
| Total | $10 to $15 | $5.50 to $9 |
FBA wins on raw fulfillment cost for canned grocery items by $4 to $6 per unit. Then add the Prime conversion advantage on top.
For a brand selling $12 cans, that $4 to $6 swing is a margin question, not a strategic preference.
The third option
There is a third path most wholesale brands do not consider: a marketplace partner who absorbs both the fulfillment cost and the operational change.
In a marketplace partner model, the partner buys your inventory wholesale (the way you already ship), handles all FBA prep, manages the Amazon listings, runs the advertising, and takes the inventory risk. You ship cases of product to a partner facility. They handle the rest. Your warehouse keeps doing what it already does.
The economics work because the partner's margin is built into the marketplace sale price, not into a service fee on top of yours. Done right, both sides win when the product sells. Both sides absorb the loss when it does not.
This is the model Scaleious operates. We are not the only ones doing it, but we are explicitly built around it.
What to actually do
If your brand is small, your margins are healthy, and you have spare warehouse bandwidth, FBA self-managed is a defensible path. Many brands have built real Amazon businesses this way.
If your operation is built around wholesale and adding direct-to-consumer logistics would distract from the core, the partner model usually wins on math and on focus.
If you want a brand-specific look at where your numbers actually land, request a free Marketplace Brief. We will model the FBM, FBA, and partner options for your specific product against current Amazon fees and expected conversion rates. Three business days, no obligation, hand-finished by our team.