Amazon’s New Inventory Placement Fee Is Rewriting FBA Unit Economics

For the better part of a decade, Amazon FBA sellers operated on a relatively stable cost floor: pay the fulfillment fee, absorb the storage fee, and treat inbound shipping as a predictable line item. That model is functionally over. Amazon’s Inbound Placement Service (IPS) fee — first introduced in March 2024 but inconsistently enforced — reached full enforcement across all standard and oversize ASINs in May 2026, and the unit economics fallout is landing hard on mid-volume sellers moving between 500 and 10,000 units per month.

The mechanics are straightforward but punishing. Under IPS, Amazon now charges sellers a per-unit fee if they opt to ship to a single fulfillment center (FC) instead of splitting inventory across Amazon’s designated receive locations. The “minimal shipment splits” option — where Amazon handles distribution — carries a fee ranging from $0.21 to $0.67 per unit for standard-size items and $1.14 to $2.06 for large bulky. Sellers who comply with Amazon’s multi-location split avoid the fee entirely, but that compliance comes with its own operational tax: coordinating LTL shipments to three, four, or sometimes five separate FCs in a single replenishment cycle.

What Is the Real Per-Unit Cost Impact for FBA Sellers?

The answer depends heavily on ASINs, velocity, and prep infrastructure. Sellers with in-house prep operations near major FC clusters — southern California, central Texas, Ohio — can absorb multi-location splits at manageable cost. For sellers relying on overseas consolidation or single-origin 3PLs in non-FC-dense regions, the math is uglier.

Kevin Sanderson, VP of marketing at Maximizing Ecommerce and a longtime FBA educator, has been tracking IPS impact across a cohort of roughly 80 sellers since enforcement tightened. His data shows that sellers who defaulted to the minimal-splits option are absorbing an average of $0.44 per unit in added fees — on top of existing fulfillment and storage costs that already rose 5 to 9 percent between 2024 and 2025.

“For a seller doing 3,000 units a month on a $28 product with a 22% net margin, that $0.44 doesn’t sound catastrophic until you annualize it. That’s $15,840 in fees that didn’t exist 18 months ago. It’s a full headcount at some of these operations.” — Kevin Sanderson, VP of Marketing, Maximizing Ecommerce

💡 Article Summary

Key Insights

1

What Is the Real Per-Unit Cost Impact for FBA Sellers?

2

How Are 3PLs Responding to the Multi-FC Split Requirement?

3

Which Product Categories Are Getting Hit Hardest?

4

Is Seller Fulfilled Prime Still a Viable Alternative?

5

How Should Sellers Restructure Their Replenishment Strategy?

Source: Ecommerce Times

The downstream effect is SKU rationalization. Several sellers interviewed for this piece said they’ve used IPS enforcement as a forcing function to cut their catalog. Products with margins under 18% — particularly in competitive categories like kitchen accessories, pet supplies, and fitness equipment — are being delisted from FBA or migrated to Fulfillment by Merchant (FBM) entirely.

How Are 3PLs Responding to the Multi-FC Split Requirement?

The multi-location split requirement has created a meaningful business opportunity for 3PLs with distributed warehouse footprints. ShipBob, which operates facilities in Chicago, Dallas, Los Angeles, Allentown, and Atlanta, among others, has been actively marketing its Amazon prep services as an IPS compliance solution since Q1 2026. The pitch: route inventory to ShipBob’s network, and they’ll handle the multi-FC split logistics for a flat per-unit prep fee.

Flexport’s fulfillment arm has made a similar push, particularly targeting importers already using Flexport’s freight forwarding services. The integrated pitch — clear customs, land at a Flexport warehouse, split to Amazon FCs in one workflow — has gained traction with sellers importing direct from Guangdong and Yiwu suppliers.

But not every seller is buying it. Cara Sayer, founder of SnoozeShade UK and an active U.S. Seller Central operator, said her team evaluated three 3PL partners before concluding that the added prep fees — typically $0.18 to $0.35 per unit on top of IPS avoidance — didn’t pencil out versus just paying Amazon’s single-ship fee on slower-moving ASINs.

“The 3PLs are selling IPS compliance as a cost-saver, but when you model it fully — their pick and prep, the extra FTL legs, your internal time managing the relationship — it’s not obviously cheaper. It depends entirely on your velocity and your average selling price.” — Cara Sayer, Founder, SnoozeShade

Which Product Categories Are Getting Hit Hardest?

Not all categories are equally exposed. The IPS fee scales with unit dimensions, which means sellers in categories with larger or heavier products carry disproportionate exposure. Industry data compiled by Jungle Scout’s market intelligence team through Q1 2026 shows the following categories with the highest IPS fee burden per ASIN:

• Home & Kitchen (large items): Average $1.38/unit incremental IPS cost on minimal-split shipments
• Sports & Outdoors (equipment): Average $1.22/unit
• Pet Supplies (food/bulk): Average $0.89/unit
• Automotive Parts & Accessories: Average $0.76/unit
• Toys & Games (large): Average $0.64/unit

Apparel and beauty sellers — whose unit economics are squeezed by return rates rather than dimensional fees — are comparatively less affected, though both categories face their own FBA cost pressures from Amazon’s returns processing fee introduced in 2024.

Is Seller Fulfilled Prime Still a Viable Alternative?

Amazon’s Seller Fulfilled Prime (SFP) program has experienced a notable surge in applications since IPS full enforcement began. According to data from Cahoot, a peer-to-peer fulfillment network that helps sellers qualify for SFP, the number of new merchants inquiring about SFP eligibility jumped 34% in the 60 days following May 2026’s enforcement rollout compared to the same period in 2025.

Manish Chowdhary, CEO of Cahoot, said the profile of inbound SFP inquiries has shifted. Rather than being primarily FBM sellers trying to upgrade their Prime badge, the new wave is FBA sellers running the IPS math and finding SFP competitive again.

“We’re seeing established FBA operators — sellers doing $2M to $8M annually — who haven’t looked at SFP in years suddenly reopening the conversation. The IPS fee is the catalyst. When you model SFP against IPS-adjusted FBA costs on a 500-unit-per-month ASIN, SFP wins on a surprising number of SKUs right now.” — Manish Chowdhary, CEO, Cahoot

The barrier remains performance metrics. SFP requires sellers to maintain a same-day ship rate above 93.5%, a valid tracking rate above 99%, and a cancellation rate below 0.5% — standards that demand either robust in-house operations or a 3PL partner with dedicated SFP infrastructure. Cahoot’s model, which routes orders through a distributed network of merchant warehouses, is designed specifically to meet those thresholds without requiring a single operator to hold all the inventory themselves.

How Should Sellers Restructure Their Replenishment Strategy?

The operational playbook that’s emerging from seller communities — including the Helium 10 Sellers Facebook group, the FBA Masterminds subreddit, and the Prosper Show Slack channel — centers on segmentation. Not every ASIN should be evaluated the same way.

Sellers are increasingly building tiered replenishment models:

• Tier 1 (high velocity, high margin): Accept the multi-FC split. Ship to all Amazon-designated receive locations. Volume justifies the logistical complexity, and the Prime badge is non-negotiable for conversion.
• Tier 2 (medium velocity, medium margin): Evaluate on a per-ASIN basis. Use Amazon’s IPS fee estimator (available in Seller Central under Shipping Queue) to model actual fee exposure before each replenishment cycle.
• Tier 3 (low velocity, thin margin): Migrate to FBM or SFP. Remove the ASIN from FBA entirely if the combined IPS fee, storage fee, and fulfillment fee pushes net margin below 15%.

Rand Fishkin, who co-founded SparkToro and has been publicly documenting his Amazon seller journey for a side project in the outdoor accessories space, posted a detailed cost breakdown on LinkedIn in late May showing how IPS enforcement pushed two of his five ASINs below profitability thresholds. He subsequently migrated both to FBM with two-day shipping via a regional carrier network, maintaining the non-Prime listing while testing conversion impact.

“The Prime badge is worth real conversion lift — probably 12 to 18 percent on our categories based on our A/B data. But at some point, you’re paying for the badge more than you’re earning from it. We crossed that line on two SKUs.” — Rand Fishkin, Co-founder, SparkToro

What Does This Mean for Amazon’s Long-Term Seller Relationship?

The broader narrative here isn’t just about one fee. The IPS charge is the latest in a sequence of cost increases — the returns processing fee, the low-inventory-level fee, rising referral fees in select categories, and record-high Sponsored Products CPCs — that have collectively compressed FBA unit economics by an estimated 8 to 14 percentage points over 24 months, according to modeling published by the consulting firm Pattern in its Spring 2026 Marketplace Health Report.

For Amazon, the logic is defensible: forcing inventory distribution improves its logistics network efficiency, reduces regional stockout risk, and optimizes its delivery promise. The IPS fee is a mechanism to get seller behavior to align with Amazon’s network needs without mandating it.

For sellers, the calculation is colder. Amazon still represents between 40% and 65% of online sales for most of the mid-market brands in this space, and exiting FBA entirely isn’t a realistic option for most. What’s changing is the margin discipline required to stay in the game.

The sellers who will navigate this successfully are those treating FBA not as a default logistics solution but as a premium distribution channel with real per-ASIN cost modeling behind every replenishment decision. The era of defaulting everything to FBA and checking the box is over.