If you sell only on Amazon and your product is small, light and proven, FBA alone is usually the cheapest way to fulfill. If you sell on Shopify, TikTok Shop or Walmart too, or your product is new, fragile, regulated or lot-tracked, use a hybrid: receive the full shipment at one U.S. location, send Amazon a measured allocation, and fulfill your own store from the same controlled inventory. A 3PL-only setup makes sense when Amazon is a minor channel or you need Seller Fulfilled control.
The three models, side by side
| Question | FBA only | 3PL only | Hybrid (3PL + FBA) |
|---|---|---|---|
| Amazon orders | Prime badge, Amazon ships | You ship as FBM; Prime only via Seller Fulfilled Prime, which is hard to keep | Prime via FBA for the allocated units |
| Shopify, TikTok Shop, Walmart | Multi-Channel Fulfillment from FBA: possible, but branded packaging is limited and fees are higher | Native, your packaging, your inserts | Native from the 3PL |
| Where the inventory sits | All of it inside Amazon, subject to their limits and fees | All of it in one warehouse you control | Working stock at Amazon, reserve at the 3PL |
| Prep and labeling | You or a prep provider, before inbound | The 3PL, if you sell on Amazon at all | The 3PL, from the same receiving |
| Slow-moving SKUs | Aged-inventory and storage surcharges | Flat pallet storage, $35 per pallet per month at Marcana | Only proven movers go to Amazon |
| Returns | Amazon handles FBA returns; removals need somewhere to go | Your address, your rules | Both, with a domestic address for removals |
| Risk on a first run | Everything locked inside FBA before sell-through is known | No Prime, slower Amazon growth | Lowest: allocation sized to replenishment lead time |
When FBA alone is the right call
FBA is a good deal when the product fits it: small and light (well under 1 lb, a mailer-size box), a single marketplace, steady sell-through, retail packaging that survives Amazon's handling, and no lot, expiry or regulated-labeling complications. On a $12 item, Amazon's fulfillment fee is usually lower than any 3PL's pick-and-pack plus carrier, and the Prime badge does the selling.
What FBA does not do is receive your container. Units still have to be counted, labeled and prepped before they go in, and since January 1, 2026 Amazon no longer offers that prep itself. Most "FBA-only" brands therefore still need a receiving and prep point, which is the inbound half of what a 3PL does.
When a 3PL alone is the right call
A 3PL-only setup fits brands where Amazon is a minor channel or absent: DTC brands on Shopify with branded unboxing, TikTok Shop sellers who need speed but not Prime, B2B and wholesale, subscription boxes and kits, and products Amazon makes hard (some regulated categories, oversized or heavy items, lot-controlled goods).
The cost is Amazon growth. Fulfilling Amazon orders as FBM from a 3PL works, and Marcana does it from Miami, but you are competing without Prime unless you qualify for Seller Fulfilled Prime, which has strict delivery-speed bars that a single warehouse cannot promise nationwide.
Why the hybrid wins for most new brands
The hybrid model is what we recommend in most first-run situations, and it is the model behind the sample logistics plan. The logic is simple:
- One inventory record. You do not buy stock twice, once for Amazon and once for Shopify, during a cycle when you do not yet know the split.
- Lot and packaging control before commingling. Problems with labels, packaging or lot numbers are caught at your receiving, where they can be fixed for a per-unit fee, not inside an Amazon fulfillment center, where they become receiving problems or unsellable inventory.
- Reserve protects service. If Amazon receiving stalls, which happens at every peak, your own store keeps shipping from the reserve.
- Allocation sized to lead time. Send Amazon roughly two replenishment cycles of stock for each SKU, keep the rest, and replenish on a trigger. Storage at a 3PL is flat; storage inside FBA is not.
What the hybrid costs at Marcana, illustration
8 SKUs, 6 pallets received, 30% of units prepped and forwarded to Amazon, 800 Shopify orders a month, one item each, mailer-size.
| Line | Rate | Monthly |
|---|---|---|
| Plan (Growth) | $179 per month, 30 boxes and 1 pallet included | $179 |
| Palletized receiving, first month | $25 per pallet × 6 | $150 once |
| Extra pallet storage | $35 per pallet per month × 5 | $175 |
| FBA prep, 1,500 units | $1 per unit at the 500 to 2,000 tier | $1,500 once per allocation |
| Shopify orders | $1.95 per order × 800 | $1,560 |
| Recurring, before carrier shipping | About $1,914 per month |
Carrier postage, materials beyond the standard mailer, duties and Amazon's own fees are on top. Every number here is a published Marcana rate; change the volume and the planner recalculates it.
The mistakes we see on first runs
- Sending 100% of the first production run into FBA. If the listing underperforms, packaging fails, or Amazon flags a label, all of your inventory is stuck where it is most expensive to fix.
- Discovering prep requirements after the pallets ship. Poly-bag, suffocation warnings, expiration formatting and FNSKU placement should be decided before the factory prints carton labels.
- No domestic address for removals and returns. Amazon removal orders and customer returns need somewhere to land. Brands abroad in particular end up refunding without recovering product.
- Using Multi-Channel Fulfillment as the Shopify plan. It works as a bridge, not as the brand experience, and it tends to cost more per order than a 3PL for anything that needs an insert or a branded box.
Questions founders ask
For small, light, fast-moving items sold only on Amazon, FBA's fulfillment fee is usually lower than a 3PL's pick-and-pack plus carrier. Once you add other channels, slow movers, prep, storage of a full production run or returns, the comparison changes, which is why most brands end up with a hybrid.
Yes. Marcana receives your shipment, counts and photographs it, applies FNSKU labels and any required prep, and forwards the allocation to Amazon's fulfillment centers with your shipment plan. The reserve stays in Miami.
Yes. Amazon discontinued its own prep services on January 1, 2026, so FNSKU labeling, poly-bagging and bubble wrap must be done before units arrive. You can do it yourself or use a third-party provider such as Marcana; published prep rates start at $0.70 per unit at volume.
Walmart Fulfillment Services works much like FBA for Walmart orders and has its own prep requirements. The hybrid logic is the same: one receiving point, measured allocations to WFS and FBA, reserve and other channels fulfilled from the 3PL.
A common operator rule is about two replenishment cycles of expected sales per SKU, so that a delay at Amazon receiving does not stock you out and a slow start does not trap inventory. The exact allocation depends on your lead time and forecast, which is what the plan review works out.