How the Latest Tariffs Are Affecting Warehousing and Transportation

Tariff policy has been one of the least predictable variables in supply chain planning since early 2025, and that volatility hasn’t settled down in 2026. Baseline duties, country-specific rates, product-specific actions under Section 232, and repeated changes to de minimis treatment have all landed on importers within the same eighteen-month stretch. For partners moving goods through U.S. warehouses and transportation networks, the practical question isn’t whether tariffs are affecting the supply chain. It’s what to do about it.

What’s actually changed, and how fast

The pattern that matters most isn’t any single tariff rate. It’s how quickly the legal ground underneath those rates has shifted:

• 2025: The Trump administration built a broad tariff program under the International Emergency Economic Powers Act (IEEPA), including a 10% global baseline “reciprocal” tariff and higher country-specific rates, alongside separate Section 232 duties on steel, aluminum, automobiles and furniture.
• February 2026: The U.S. Supreme Court struck down the IEEPA-based tariffs, effectively wiping out the reciprocal tariff program, including the 10% global baseline.
• Following the ruling: The administration moved quickly to temporary Section 122 tariffs, a statute that caps duties at 150 days unless Congress acts to extend them.
• July 24, 2026: Those Section 122 tariffs expired on schedule. The same day, new Section 301 tariffs took effect on roughly 60 trading partners at 10% or 12.5%, justified by a forced-labor investigation the U.S. Trade Representative opened in March 2026.
• July 25, 2026: Two importers, spice company Burlap and Barrel and watch retailer Collective Horology, sued the federal government in the U.S. Court of International Trade, arguing the new Section 301 rates simply reassemble the invalidated IEEPA rate structure under a different legal theory, and that USTR rushed the investigation to get there, according to Supply Chain Dive’s reporting.

Section 232 tariffs on steel, aluminum, automobiles and furniture sit on a separate legal track and remain in force regardless of how the Section 301 litigation resolves. For the fullest, most current picture, Supply Chain Dive maintains a live tracker of every active U.S. trade action, and the Office of the U.S. Trade Representative and U.S. Customs and Border Protection publish the authoritative rate schedules and effective dates.

The takeaway for anyone planning inventory or warehouse capacity: this isn’t just a story about rates going up and down. Tariffs have now been struck down by the Supreme Court once, replaced with a temporary statute that expired on its own clock, and replaced again with a program that’s already being challenged in court within 24 hours of taking effect. Duties paid today are not guaranteed to be the duties that stick.

What the new Section 301 tariffs actually cover

Per FreightWaves’ reporting, the new duties apply to 60 economies representing 99.4% of U.S. imports, structured in three tiers:

• 10% tariff: Mexico, Canada, India, Indonesia, Malaysia, Pakistan, Bangladesh, Cambodia, Guatemala, El Salvador, Honduras, Jordan, Sri Lanka, Argentina, Trinidad and Tobago, the United Kingdom, and Ecuador.
• Combined-rate structure capped at 10-12.5%: The European Union and Taiwan are structured so their existing Most-Favored Nation tariff plus the new duty totals 10%, while Japan, South Korea and Switzerland are capped at a combined 12.5%.
• 12.5% tariff: The remaining 38 economies, including China, Australia, Brazil, Thailand, Vietnam and South Africa.

Several categories are exempt, which matters for partners sourcing raw materials or commodities: oil and natural gas, fertilizer, certain food products, raw materials not available domestically, and goods qualifying under the U.S.-Mexico-Canada Agreement. Goods already in transit before the tariffs took effect are exempt through July 28, 2026. The administration also directed USTR to set up tariff-rate quotas later this year for textile and apparel imports from Bangladesh, Cambodia, Indonesia and Malaysia, which is worth tracking for partners in apparel and soft goods.

Why this round is landing differently

As CNBC reported, market analysts see this wave as more consequential than the April 2025 “Liberation Day” announcement, even though the initial market reaction was calmer. The reasoning: moving the legal basis from IEEPA emergency powers to Section 301 of the Trade Act of 1974 closes the exact loophole the Supreme Court used to strike down the earlier tariffs, which several analysts interpreted as a sign the administration intends tariffs to be a lasting fixture of trade policy rather than a negotiating tactic. That’s landing alongside a separate U.S.-Iran military conflict pushing oil prices back above $100 a barrel, adding inflation pressure at the same time import costs are rising. For partners weighing inventory and warehousing decisions, the practical implication is that betting on tariffs being negotiated away in the near term is a weaker assumption than it was a year ago.

Should you increase inventory?

Front-loading was the first instinct for a lot of importers back in 2025. Ahead of announced tariff deadlines, container volumes at major gateways spiked as partners rushed to bring in goods before new rates took effect, a pattern documented repeatedly in the National Retail Federation’s Global Port Tracker and in Journal of Commerce import volume reporting. That surge was typically followed by a pullback once the front-loaded inventory was in place, creating a whipsaw effect on warehouse utilization and inbound freight volumes.

The calculation has gotten more complicated since. With Section 301 tariffs now facing a lawsuit less than a day after taking effect, and a track record that includes the Supreme Court striking down an entire tariff program earlier in 2026, importers are managing not just changing rates but genuine uncertainty about whether today’s duties will hold up. That cuts both ways on inventory: bringing goods in now locks in today’s rate, but if a court later finds the tariff invalid, refunds and retroactive relief take time to materialize, and importers who paid under protest are generally better positioned than those who didn’t.

The lesson from that cycle isn’t “always hold more inventory.” It’s that a pure just-in-time model leaves very little room to react when a tariff announcement lands with 30 days’ notice. Most partners have landed somewhere between the two extremes:

• Holding a modest safety-stock buffer on tariff-exposed SKUs, rather than doubling inventory across the board
• Timing replenishment around known tariff effective dates and trade negotiation deadlines
• Diversifying sourcing across countries so no single tariff action can freeze the whole supply chain

The trade-off is real. Extra inventory means extra carrying cost and extra warehouse space. The goal is flexible capacity you can scale up during a front-loading window and scale back down afterward, without being locked into a long-term lease sized for the peak.

Is domestic warehousing becoming more valuable?

Yes, and industrial real estate research backs this up. CBRE’s industrial and logistics research and JLL’s research have both tracked how tariff uncertainty pushed some manufacturers and retailers to reassess “just-in-case” inventory positioning, favoring U.S.-based storage that gives them more control over timing and duty exposure. A few structural advantages are driving that shift:

Foreign-Trade Zones and bonded storage

Goods held in a Foreign-Trade Zone (FTZ) or bonded warehouse can sit without duties being paid until they’re formally entered into U.S. commerce, or in some cases duties can be reduced or eliminated entirely if the goods are re-exported. When tariff rates are changing every few months, and when the underlying legal authority for a given tariff is actively being litigated, that deferral is a real hedge, not just an accounting technicality. It buys time to see how a case like the current Section 301 challenge plays out before committing to a duty payment.

Duty drawback

Partners that import, process, and re-export goods can potentially recover duties paid on the imported inputs through a duty drawback program. It requires disciplined recordkeeping, which is exactly where a warehouse partner with the right systems earns its keep.

Shorter, more resilient inbound lanes

Domestic warehousing paired with nearshored or diversified sourcing shortens the distance between a tariff policy change and a partner’s ability to react. Goods already in the country, or close to it, are easier to reroute, re-label, or reclassify than goods still on the water.

How a 3PL can help reduce tariff risk

None of the tools above require a partner to build in-house customs and trade expertise from scratch. This is where a third-party logistics provider earns its role in the strategy:

• Flexible, scalable space. Contract and public warehousing lets partners expand during a front-loading surge and contract afterward, without a long-term lease sized for a worst-case scenario.
• FTZ and bonded warehouse access. A 3PL with FTZ-designated or bonded facilities gives partners duty deferral options without the capital investment of establishing their own zone.
• Multi-region inventory positioning. Spreading inventory across multiple warehouse locations and ports reduces the risk that a single tariff action on a single country or lane disrupts the whole network.
• Visibility and speed to react. When a tariff rate changes with a month’s notice or less, the partners who move first are the ones with real-time visibility into what they have, where it is, and how fast it can move.

FAQ: Tariffs, warehousing, and transportation

Should companies increase inventory because of tariffs?

Many companies are holding more buffer inventory than they did under lean, just-in-time models. Carrying extra stock ties up cash and warehouse space, so the better question is usually where and how that inventory is held, not just how much of it there is.

Is domestic warehousing becoming more valuable because of tariffs?

Yes. Holding goods in U.S.-based warehouses, including Foreign-Trade Zones and bonded facilities, gives partners more control over when and how duties are paid, which matters more when tariff rates and effective dates keep changing.

How can a 3PL help reduce tariff-related risk?

A 3PL can offer flexible, scalable warehouse space without long-term lease commitments, support Foreign-Trade Zone and bonded storage, help diversify inventory across multiple ports and regions, and provide the visibility partners need to react quickly as policy changes.