3PL vs FBA: Which One Ships Your Wholesale Orders

FBA is a parcel machine. It receives your cartons, stores them, picks one unit at a time and hands it to a carrier with an Amazon label on it. A third-party logistics warehouse is a general-purpose warehouse: it will pick one unit, or forty-eight units in a case, or twelve cases on a pallet, put whatever label the customer's routing guide demands on it, and book a freight carrier that the customer chose.

That difference is the whole comparison. Nothing about FBA is bad at wholesale on purpose. It was built to fulfil a consumer order from a marketplace, and a wholesale purchase order is not that. The moment a distributor sends you a PO for six cases with a delivery window and a carton label spec, you are asking FBA to do a job it has no interface for.

So the question is not which is better. It is which of your orders belongs in which building, and what the second building costs you.

What FBA does that a 3PL usually cannot

Start with the honest side of the ledger, because sellers who discover wholesale often talk themselves into leaving FBA too early.

FBA buys you Prime placement. That is a ranking and conversion effect you cannot replicate by shipping the same unit yourself from a warehouse in Ohio. Seller Fulfilled Prime exists, but it comes with delivery-speed obligations that a small 3PL frequently cannot meet on every zip code.

FBA also buys you returns handling at scale, customer service on the Amazon side, and a national footprint. Your unit sits in several buildings at once, which is why the delivery promise is short. A single 3PL is one building, or two if you pay for two, and your transit time to the far coast is a real number of days.

And FBA absorbs variance. A deal spikes your daily orders tenfold and nothing breaks. Tell a small 3PL that tomorrow is ten times normal volume and you had better have warned them a week ago.

What a 3PL does that FBA cannot

Now the other side, and this is the list that matters once a retail buyer says yes.

A 3PL will build a case pack. It will pick twelve inners, put them in a master carton, apply a GS1-128 carton label with the purchase order number encoded in it, stack the cartons on a pallet in the pattern the retailer's routing guide specifies, shrink wrap it, and stage it for a carrier the retailer's logistics team booked. FBA has no concept of any of that.

A 3PL will follow a routing guide. Retail routing guides tell you which carrier to use, which day to tender the freight, how to label, what paperwork rides with the shipment and where to send the advance ship notice. Missing any of it produces a chargeback against your invoice. A warehouse that works with retail accounts reads these documents for a living.

A 3PL will send an advance ship notice. Most mid-size and larger retailers require an electronic notice before the truck arrives, tied to the carton labels so their receiving scan matches your document. The mechanics, and the question of who actually operates the connection, are covered in EDI for Amazon brands.

A 3PL will also hold inventory that is not committed to Amazon. That sounds trivial until the first time a distributor asks whether you can ship four hundred units next Tuesday and the honest answer is that all four hundred are in an Amazon building and coming back out would take three weeks.

The cost comparison sellers get wrong

Both models charge for the same three things — receiving, storage, and getting a unit out the door — but they bundle them differently, and comparing headline rates produces nonsense.

The trap is the last row. An FBA fulfilment fee looks large next to a 3PL pick fee until you notice the 3PL number excludes the parcel carrier. For a single small unit going to a consumer, FBA is usually cheaper all-in and always faster to set up. For a pallet going to a distributor's dock, the 3PL is not just cheaper, it is the only one that can do it.

Do the math per order type, not per unit. Take a candle that costs you four dollars landed and retails at twenty-four. A single consumer unit through FBA carries a referral fee and a fulfilment fee and leaves a known margin. The same candle sold wholesale at twelve dollars in a case of six carries no referral fee, no ad spend, and one pick line for the whole case instead of six. The fulfilment cost per unit collapses. That is the actual reason wholesale margin survives a lower price.

Does running both double your work

It adds work, but not double, and the shape of the extra work is predictable.

You now have inventory in two places, which means you need one number that tells you how much is truly available to promise. Two systems that each think they own all your stock will oversell you within a month. Settle on one source of truth, usually your 3PL's system or an inventory layer above both, and make the Amazon restock decision a deliberate transfer out of that pool. The allocation rules are worked through in inventory split between Amazon and wholesale.

You also have two prep standards. Amazon wants poly bags, suffocation warnings and FNSKU labels on units. Retail wants shelf-ready packaging and carton markings and usually no FNSKU anywhere. Decide early whether your cases are built retail-first and prepped for Amazon at the 3PL, or built Amazon-first and stripped for retail, because doing it backwards costs labour on every order. FBA prep vs wholesale packaging covers which direction is cheaper for which product.

And you have a second set of invoices. A 3PL bills you monthly with a dozen line items, some of which will surprise you. Read the rate card for special-project labour, pallet handling, carton relabelling and account minimums before you sign, not after your first chargeback.

When to stay on FBA only

If every order you ship is a single consumer unit, and the only wholesale interest you have had is a supplier asking for your price list, stay where you are. Adding a warehouse before you have a buyer is a fixed cost against a hypothetical.

There is a middle step that costs nothing to set up and answers the question honestly: fulfil the first few wholesale orders out of FBA using multi-channel fulfilment. It will be expensive per unit and the packaging will be wrong, but it proves whether the buyer reorders. Multi-channel fulfilment for wholesale explains where that trick works and where it falls apart.

Before any of that, it is worth knowing whether real buyers exist for your product at all. Paste your listing into WholesalePilot and the preview shows which distributors and retailers plausibly stock products like yours, which is a cheaper way to test the channel than signing a warehouse contract.

When to add the 3PL

Three signals, any one of which is enough.

A buyer has asked for a case pack, a routing guide acknowledgement or an advance ship notice. None of those are optional and none of them happen inside Seller Central.

Your wholesale volume is steady enough that removal orders have become a habit. Pulling stock back out of Amazon to fill a PO is a rescue move, not an operating model, and the reasons are set out in FBA removal orders for wholesale.

Or your storage bill has a long-term surcharge on it. Slow-moving sizes and colours belong in a cheap pallet position, not an Amazon fulfilment centre, and moving them out often pays for the 3PL account by itself.

The version most brands end up running

The stable end state for a brand selling both channels is a hub and spokes. The 3PL is the hub: your factory ships there, the stock is counted there, wholesale orders leave there on pallets. FBA is one spoke, restocked on a cadence from the hub, holding only enough for the Amazon sales rate plus a buffer.

That arrangement keeps the Prime badge, keeps the wholesale capability, and keeps one honest inventory number. It costs a little more than pure FBA and a lot less than discovering mid-quarter that your biggest new account cannot be served. How the two nodes actually run day to day, including what to put in the warehouse agreement, is covered in Amazon FBA vs 3PL.