If you are still “going with your gut” on AWD vs 3PL in 2026, you are gambling with your margins. AWD fees have shifted, 3PL quotes are all over the map, and what worked even a year ago can quietly turn profitable SKUs into break‑even inventory.
In this post, I will show you how to compare Amazon Warehousing & Distribution (AWD) and a traditional 3PL on a simple, apples‑to‑apples per‑unit basis using the cost calculator I demo in the video.
What AWD Actually Is (And What It Is Not)
Amazon Warehousing & Distribution is Amazon’s version of a very basic 3PL. Think of it as bulk inbound, storage, and drip‑feeding inventory into FBA so you can stay in stock without constantly creating new shipments.
AWD is not a full‑service operations hub. There is no kitting, no bundling, no carton rework, no relabel projects. It is designed to be a storage and replenishment buffer that keeps FBA fed, not a prep center that solves messy operational problems.
On the cost side, AWD is beautifully simple. You are billed by the box and by cubic foot: storage per cubic foot, per‑box handling for inbound and outbound, and a transportation charge to move stock from AWD into FBA. The catch is that your case pack will decide how cheap or expensive that feels on a per‑unit basis.
3PLs: Flexible, Powerful, and Messy to Price
Most 3PLs all say a similar story: pallet storage, inbound receiving, and outbound shipments into FBA. The big difference is everything extra they can do for you: prep, kitting, relabeling, cartonization, mixed‑SKU pallets, and custom projects that AWD simply does not touch.
The downside is that 3PL pricing is rarely plug‑and‑play. One “simple” inbound pallet can rack up multiple charges:
- Receiving the pallet
- Monthly pallet storage
- Breaking down over‑height pallets if they only rack to 52–60 inches
- Re‑palletizing, bin storage, or case‑level handling
- Extra touches like labeling or bagging
That is why just comparing rate cards never gives you a clean answer. To do this right, you need to turn those invoices into a single per‑unit number and set it next to your AWD per‑unit cost.
Why Case Pack Optimization Decides AWD Costs
If there is one AWD principle to tattoo on your brain, it is this: AWD is case‑pack driven. The more units you can safely get into each box, the more you dilute that per‑box fee and the lower your true per‑unit cost becomes.
In the video, I walk through a simple example:
- Case pack: 100 units per box
- 24 boxes perfectly filling a standard 48 x 40 x 72‑inch pallet
- Stored in a non‑premium region, using one of the better AWD rate tiers
In that kind of “dream scenario,” AWD can land in a very reasonable per‑unit range just on AWD fees, before you even decide whether to roll inbound freight into the calculation.
Change your case pack and the economics shift fast. Drop to 20 units per box and you are now spreading the same per‑box handling and cubic‑foot charges over far fewer units. That per‑unit cost can spike dramatically, even though the line‑item fees did not change at all.
If you can safely increase case height, reduce void space, and keep the weight manageable, you usually get rewarded with significantly better AWD per‑unit economics.
A Practical Framework: AWD vs 3PL on One SKU
The smartest way to compare AWD and a 3PL is not at the account level. It is SKU by SKU, using the same assumptions on both sides. That is exactly what the AWD vs 3PL Cost Calculator is built to do.
Here is the basic workflow I recommend:
- Model your AWD cost
- Units per box
- Box dimensions in inches
- Months of storage you expect in AWD
- Region (West vs everywhere else)
- Rate type (Base, Smart Storage, or Amazon‑Managed)
- Model the exact same pallet at your 3PL
- Number of pallets stored
- Inbound receiving cost per pallet
- Monthly pallet storage
- Outbound pallet handling into FBA
- Layer in real‑world friction
- Does your 3PL accept 72‑inch pallets or do they break them down and charge for two pallets?
- Are you actually using bin storage for some SKUs?
- Are there recurring prep or rework tasks that are not optional?
When you do this honestly, you typically find a pattern: a clean store‑and‑forward 3PL is cheaper per unit. As soon as you add touches, capacity limits, and operational reality, the gap narrows or flips, depending on the SKU and your case pack.
How To Reverse‑Engineer Your 3PL Invoices
If you are already using a 3PL, you do not need to guess. You can pull your actual invoices and translate them into a clear per‑unit cost with a simple process.
Here is a straightforward approach:
- Grab 2–3 recent months of 3PL invoices.
- Decide what you want to compare. If you are comparing storage and handling only, strip out pure transportation line items that you would pay in both scenarios.
- Add up everything that is storage, inbound receiving, outbound handling, pallet work, and standard prep for that SKU or group of SKUs.
- Count how many units moved through the 3PL during that same period.
- Divide your total charges by the number of units. That is your real blended per‑unit cost.
Now you can plug that number into the calculator right next to your AWD per‑unit output and see, in plain English, which one is actually cheaper for that SKU.
If you want help, my team does this every day. We take your invoices, unpack the fine print, and turn them into simple, per‑unit numbers you can actually make decisions with.
When AWD Wins, When a 3PL Wins
Once you have clean per‑unit numbers, the decision becomes much less emotional and much more obvious.
AWD tends to win when:
- The SKU has solid velocity and does not sit for long stretches.
- You have efficient, dense case packs that play nicely with pallet dimensions.
- You qualify for stronger AWD rate tiers and keep inventory flowing steadily.
- You value simplicity and want Amazon to handle most of the FBA placement work.
A 3PL tends to win when:
- The SKU is slower, seasonal, or long‑tail and needs long storage windows.
- The product is large, awkward, or does not palletize cleanly for AWD.
- You want tight control over when, where, and how inventory moves into FBA.
- You need prep, kitting, or multi‑channel support that AWD does not provide.
The biggest mistake is treating this as a binary choice. Many of the best‑run catalogs use a hybrid model: AWD for certain FBA‑bound SKUs where the math works, a 3PL for slow movers and complex products, and direct‑to‑FBA for specific high‑velocity items.
Grab the Calculator and Get Your Storage Cost Audit
If you are done guessing on AWD vs 3PL, the next step is simple: run your real numbers.
Use the AWD vs 3PL Cost Calculator with your actual case packs, pallet heights, storage durations, and invoice data. Do it SKU by SKU, and you will quickly see which products belong in AWD, which belong in a 3PL, and which might need a different strategy altogether.
And if you want help going deeper, you can request a free Storage Cost Audit at AmazonStoragePros.com. My team will:
- Break down your invoices
- Optimize your case packs
- Map out a storage and inbound strategy tailored to your catalog
When storage and transportation fees keep ratcheting up, the sellers who win are the ones who know their per‑unit costs cold and route every SKU where it is most profitable to live.