FBA Inventory Placement Service

If you’ve ever created a shipping plan in Seller Central and watched Amazon split your 1,000 units across four different fulfillment centers in four different states, you already understand the problem. Amazon’s default distribution model, called Distributed Inventory Placement, spreads your stock across its network to position products closer to buyers. That’s good for delivery speed. It’s terrible for your shipping budget when you’re paying for four separate LTL shipments instead of one.

What the Inventory Placement Service Changes

The FBA Inventory Placement Service (IPS) is an optional program that lets you send all your inventory to a single fulfillment center. Amazon then handles the redistribution internally, moving units to other warehouses on their own trucks and through their own sortation network. You pay a per-unit fee for this convenience, but you ship to one address.

As of Amazon’s current fee structure, the Inventory Placement Service fee ranges from $0.30 per standard-size unit to $1.30 or more per oversize unit, depending on weight and dimensions. These fees change periodically, and Amazon introduced tiered pricing in 2024 that increased costs for heavier items. You’ll want to check the latest Seller Central fee schedule before committing, because the math shifts depending on your product profile.

When It Saves Money (and When It Doesn’t)

The cost comparison isn’t as simple as IPS fee versus multiple shipment costs. You need to factor in several real numbers.

Sending four separate pallets via LTL freight to four locations might cost $250 to $400 per pallet, depending on distance and freight class. That’s $1,000 to $1,600 total. If you’re shipping 1,000 units, the IPS fee at $0.30 per unit is $300. One pallet to one location might cost $300 in freight. Total: $600 versus $1,000+. The savings are clear.

But if you’re sending lightweight items where the per-unit IPS fee is close to what you’d spend on split shipments anyway, or if your shipment quantities are small (under 200 units), the fee can actually exceed your freight savings. Sellers with products over 2 lbs per unit often find the IPS oversize fees eat into margins quickly.

Operational Complexity

Beyond the dollar comparison, there’s a labor cost most sellers underestimate. Split shipments mean creating separate box groups, printing different labels for different destinations, and coordinating multiple freight pickups or parcel shipments. Each shipment needs its own bill of lading if going LTL. Each one needs separate tracking. If one shipment arrives with a discrepancy, you’re troubleshooting with that specific fulfillment center while your other three shipments process normally. Managing four inbound workflows instead of one adds hours of administrative work per replenishment cycle.

For sellers replenishing weekly or biweekly, those hours compound. A seller doing 50 replenishment cycles per year could spend 100+ extra hours just managing split shipments compared to single-destination sends.

How Prep Centers Work With IPS

Most 3PL prep services like MeisterPrep build IPS into their workflow by default. Your inventory arrives at the prep center, gets inspected, labeled, and prepped. Then the prep team creates the shipping plan, opts into Inventory Placement, and sends everything to the single designated fulfillment center. Because prep centers ship high volumes daily, they often negotiate better LTL and FTL rates than individual sellers can get, which stacks on top of the IPS savings.

The prep center also absorbs the complexity of Amazon changing the designated fulfillment center between shipments. You might send to ONT8 in California one week and PHX6 in Arizona the next. A prep center with established carrier relationships to dozens of Amazon facilities handles this routing automatically. A seller shipping from their garage has to requote freight every time the destination changes.

The 2024+ Shift

Amazon has been pushing sellers toward its newer Amazon Warehousing and Distribution (AWD) program as an alternative to IPS. AWD lets Amazon store your bulk inventory in their upstream warehouses and auto-replenish fulfillment centers. It competes directly with IPS for the “send to one place” use case, but comes with its own fee structure and less seller control over timing. Many sellers still prefer IPS through a prep center because they retain control over when and how much inventory enters Amazon’s network.