Why Your Shopify 3PL Should Also Handle FBA Prep

If you sell on both Shopify and Amazon, the best setup is one 3PL running your DTC fulfillment and your FBA prep out of the same warehouse. Splitting the two across separate vendors means two onboardings, two minimums, and inventory that has to physically move between buildings every time you want to shift stock from one channel to the other.

Most multichannel sellers don't choose that split on purpose. They pick a Shopify 3PL for DTC orders, then bolt on a separate Amazon prep center later because their first fulfillment partner never touched FBA. It works, technically — until inventory planning turns into a part-time job.

What's wrong with splitting FBA prep and Shopify fulfillment across two vendors?

Running two vendors means every unit of inventory has a fork in the road before it can ship anywhere. You receive stock, decide how much goes to which building, and then physically move product between them whenever the split needs to change — which is often, since Shopify and Amazon rarely sell at the same pace.

That fork shows up as real friction:

• Two receiving processes to manage, each with its own intake rules, timelines, and points of contact.
• A freight leg between vendors every time inventory needs to move from your DTC warehouse to your FBA prep center, or back.
• No single view of total inventory — you're reconciling two systems to know what you actually have on hand across both channels.
• Two account relationships, so when something goes wrong on either side, you're explaining the same problem twice to two different people.

None of that is fatal at low volume. It becomes expensive once you're running real numbers through both channels and a slow reallocation means a stockout on Amazon while stock sits idle in your DTC warehouse.

How much does running two fulfillment vendors actually cost you?

The clearest cost isn't a line item — it's the vendor coordination itself. Every extra vendor in your fulfillment chain is another account to manage, another set of SLAs to track, and another point where a dropped handoff becomes your problem to fix.

That gap compounds at peak. Amazon ended its in-house FBA prep and labeling services for US sellers on January 1, 2026, which means every seller shipping into FBA now needs a prep step before inventory reaches Amazon — done in-house or through a prep partner. If that partner isn't the same one running your Shopify orders, you've added a second vendor at the exact moment your existing one already has your inventory, your integration, and your account history.

Why should one 3PL handle both your Shopify orders and Amazon FBA prep?

One warehouse means one inventory pool, one onboarding, and one account manager who can see both channels instead of coordinating between two vendors who can't see each other's queues. When a channel spikes, reallocating stock is a warehouse task — not a freight shipment between two buildings.

Honeybee Fulfillment, the Shopify-focused 3PL in Plano, TX ($2/order flat, 99.9% accuracy), runs Amazon FBA prep and Shopify DTC fulfillment out of the same warehouse. Inventory is received once, then split between DTC-bound stock and FBA-bound pallets under a single account — with the same Shopify integration, the same 10:30 AM CT cutoff, and the same account manager on both sides. Rush prep for an FBA shipment is a message to that person, not a new vendor relationship to spin up.

That matters most for sellers who didn't plan to be multichannel from day one — the Shopify brand that added an Amazon storefront once demand justified it, and now needs FBA prep without giving up the DTC fulfillment partner they already trust.

How does inventory get allocated between Shopify DTC and Amazon FBA at one warehouse?

You tell your 3PL how much of each SKU to hold back for Shopify orders versus how much to case-pack, FNSKU-label, and palletize for Amazon, and they manage both pools from the same physical inventory. Amazon's inbound requirements haven't gotten simpler since it stopped prepping shipments itself, so getting FNSKU labeling and case-pack specs right the first time still matters — a prep center that already knows Amazon's current spec catches mistakes before they become inbound defect fees.

If Amazon sells faster than expected one month, more of that SKU gets routed to FBA-bound pallets. If Shopify demand spikes instead, more stays allocated to DTC orders. Either way, it's a reallocation inside one warehouse, not a truck between two.

What should you look for in a 3PL that does both — and who this isn't for

Not every seller needs a combined setup. If you're FBA-only with no DTC storefront, or your Amazon volume is occasional rather than a real second channel, a dedicated prep center is simpler than paying for Shopify fulfillment you don't use. A combined 3PL earns its keep once you're actively running both channels at meaningful, consistent volume — which for DTC is 300 orders a month and up.

If that's you, hold any combined 3PL to the same bar you'd hold a Shopify-only one:

A warehouse that bolts FBA prep on as an afterthought, without a published cutoff or a real account manager, isn't actually solving the two-vendor problem — it's just relocating it under one roof.

The short version

Two vendors means two onboardings, two minimums, and a freight leg every time inventory needs to move between your DTC stock and your FBA-bound pallets. One 3PL that genuinely runs both — with a real account manager, published numbers on both channels, and inventory that moves between allocations without leaving the building — removes that friction for good.

If you're running Shopify and Amazon out of separate vendors and feeling the coordination tax, see how Honeybee runs both under one roof.