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Most marketplace sellers don't lose money on the sale. They lose it in the miles, boxes, fees and delays between the factory and the customer's front door.

In 2026 that gap got wider. Fees changed more than once, tariffs moved landed costs, and marketplaces pushed more operational work back onto sellers. By some industry estimates, fees, ads and fulfillment now eat 45–55% of revenue for many Amazon brands. At the same time, TikTok Shop's US sales hit $11.8 billion in the first half of 2026, more than double a year earlier. Whether you sell on Amazon, TikTok Shop, Walmart, eBay or your own site, logistics is no longer a back-office task. It's where your margin is won or lost.

The challenges sellers are facing right now

1. Fees that change faster than your pricing

Amazon raised US FBA fulfillment fees on January 15, 2026, by about $0.08 per unit on average. Then a 3.5% fuel and logistics surcharge landed on top of fulfillment fees starting April 17. Holiday peak fees run from October 15, 2026 through January 14, 2027. TikTok Shop's Fulfilled by TikTok (FBT) rate card changed seven times between January and July. Each change looks small alone. Stacked together, they quietly erase the margin many sellers priced in at the start of the year.

2. Inbound shipments that cost more than they should

Inbound placement fees were restructured in January 2026 and now vary by weight band within each size tier. Sellers who ship everything to one location pay for Amazon to spread it out. Sellers who split shipments pay more in freight and handling. On top of that, inbound defect fees hit shipments that arrive late, mislabeled or misrouted. Choosing the wrong option on every shipment adds up fast.

3. More prep and compliance on the seller's shoulders

Amazon stopped offering FBA prep and labeling services in the US on January 1, 2026. Every unit now has to arrive ready to sell, correctly labeled and packaged. One mistake can mean rejected inventory, extra fees or stock stuck in limbo during your busiest weeks.

4. Tariffs and a moving landed cost

Trade policy shifted repeatedly this year, including a February 20, 2026 Supreme Court ruling against IEEPA-based tariffs and the end of the de minimis exemption. Many sellers still price off the factory invoice instead of true landed cost: product, freight, duties, brokerage and inbound fees combined. When that number is wrong, every pricing and reorder decision built on it is wrong too.

5. Cash tied up in inventory

Amazon moved to a DD+7 payout policy in March 2026, holding funds seven days after delivery. Meanwhile, low-inventory fees now apply at the individual FNSKU level, so running lean has a cost too. Sellers are squeezed between paying to store too much and paying for having too little.

6. TikTok Shop: fast growth, strict shipping clocks

TikTok Shop is the fastest-growing marketplace in the US, and its logistics rules are built around speed. Sellers coming over from Amazon often underestimate how little slack there is:

Roughly 5,700 US stores topped $1 million in TikTok Shop sales in the first half of 2026, up from 752 a year earlier. Viral demand is great, until a video takes off and you can't ship in time.

7. Multichannel complexity

Growing brands rarely sell in one place anymore, and neither do their customers: by one estimate, 97% of US TikTok Shop buyers also shop on Amazon. Each marketplace and your own website come with different prep rules, carrier requirements and inventory pools. Without a plan, sellers end up with stock in the wrong place, duplicate costs and overselling on one channel while another sits full.

What a well-suited logistics solution actually fixes

The answer isn't a bigger warehouse or a cheaper carrier. It's a logistics setup built around your products, your channels and your cash position. Here's what that looks like in practice:

The sellers pulling ahead in 2026 aren't always the ones with the best product. They're the ones whose operations are tight enough that every fee change and tariff shift is a planning exercise, not a crisis.

Where Seller Edge Logistics comes in

Seller Edge Logistics helps Amazon, marketplace and direct-to-consumer sellers find and fix the profit leaks in their supply chain. We look at your inbound strategy, fee exposure, prep process, landed cost and inventory plan, then build a practical roadmap to tighten each one.

Our approach comes from nearly two decades in logistics and e-commerce operations, including global express shipping and large-scale marketplace fulfillment. We know where the costs hide because we've worked on the other side of the dock.

If 2026 has made your margins harder to predict, let's talk. Visit selleredgelogistics.com to schedule a conversation.

Seller Edge Logistics is an independent consulting firm and is not affiliated with, endorsed by or sponsored by Amazon.com, Inc. or any marketplace mentioned in this article. Fee and policy details are current as of October 2026 and may change; confirm current rates in your seller account.

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