Creating an Amazon FBA inbound shipment: shipment plans, placement fees, and discrepancies without surprises

Your inbound process is not a logistics formality, it is a cost line you actively steer. Since Amazon introduced the inbound placement fee in March 2024, the way you create a shipment plan directly determines what you pay per unit. Anyone who blindly clicks "minimal splits" because it is the least work pays the highest surcharge and often does not even know how much.

Short answer. You create an FBA inbound shipment through Send to Amazon in Seller Central: you choose a packing type, label every unit with an FNSKU, and pick a placement option. Minimal splits to a single FC carries the highest inbound placement fee; Amazon-optimized splits across multiple FCs are cheaper or free. AWD avoids the fee entirely.

How to create an FBA inbound shipment that lines up with your restock limits

The creation itself goes through Send to Amazon in Seller Central. You select SKUs, indicate whether you are sending case packs or individual units, and confirm prep and labeling requirements. Every unit must carry a scannable FNSKU label unless you pack with an Amazon barcode or stickerless; wrong or missing labeling leads to prep fees or a rejected shipment.

The mistake I see most often with established sellers is not in the labeling, but in the sequence. They build a shipment plan based on what is sitting in the warehouse, and then run into their restock limit. You have to work the other way around: first read out your available restock room per ASIN, then fill your shipment plan up to that ceiling. Send more than your limit allows and part of it will not get received, leaving you with surplus inventory in your own warehouse that you could have spread out.

What the inbound placement fee costs you and how to lower it

The inbound placement service fee has applied since March 1, 2024 and is calculated per unit based on size, weight, and your chosen placement option. For standard size the surcharge ranges roughly from a few cents to just under a dollar per unit; for large bulky it climbs considerably higher. I do not quote exact amounts because Amazon adjusts them per period, but the principle is stable: the less you split, the more you pay.

You have roughly two options. Minimal shipment splits send everything to one or a handful of FCs and Amazon distributes it internally afterward, for which you pay the full fee. Amazon-optimized or partial splits let you distribute the shipment across multiple inbound locations, which lowers the fee or brings it to zero. The amount you see in Send to Amazon is an estimate; the actual fee is settled only 45 days after receipt. That time gap is exactly why this so often leaks invisibly out of your margin: you pay for shipments from a month and a half ago without it showing up in your product calculation.

Split shipments and AWD as a structural choice

An Amazon-optimized split means, in practice, multiple boxes to multiple FCs, sometimes on the other side of the country. That lowers the placement fee but raises your own shipping costs and manual work. The trade-off differs per shipment and depends on your carrier rates and box configuration. That is exactly the kind of calculation you do not want to do by hand: it belongs automated, per shipment plan, against your actual freight costs.

Amazon Warehousing and Distribution (AWD) is the structural alternative. Send your bulk inventory to AWD and Amazon handles the forward placement into FBA, and the inbound placement fee disappears because it is an included service. For sellers with predictable, high volumes and seasonal peaks, that is often cheaper than splitting yourself every time. For those who send in little and irregularly, AWD storage is dead cost instead. It is a build-vs-buy question at the inventory level, and you answer it with numbers, not with a gut feeling.

Inbound discrepancies: when Amazon receives fewer units than you sent

You send 500 units, Amazon receives 480. That is an inbound discrepancy, and it happens more often than sellers think. Sometimes the rest is found and received later, sometimes not. If you do not recover the difference after the reconciliation window, you are entitled to a reimbursement, provided you can prove it with your proof of delivery, packing list, and carrier data.

The problem is that no one tracks this by hand across hundreds of shipments. The amount per discrepancy is small, the number is large, and together it is a structural margin leak. What belongs here is a dashboard that, per shipment plan, sets your sent quantities against what Amazon received, flags the deviations, and watches the claim deadlines. That is not a tool you buy, that is a connection to your SP-API data that follows your situation. I build that, because a standard report in Seller Central will never give you this at a glance.