Your import costs just changed. Dramatically.
The Supreme Court ruled 6-3 this morning that President Trump's sweeping tariffs imposed under the International Emergency Economic Powers Act are illegal. The opinion in Learning Resources, Inc. v. Trump, No. 24-1287 (2026) landed at 10:00 a.m. Eastern, and the shockwave is still moving through ports, procurement offices, and boardrooms.
Chief Justice Roberts, writing for the majority, didn't mince words: "IEEPA contains no reference to tariffs or duties. The Government points to no statute in which Congress used the word regulate to authorize taxation. And until now no President has read IEEPA to confer such power."
The headline number: the effective U.S. tariff rate just dropped from 16.9% to 9.1%, according to the Yale Budget Lab. That's still the highest since 1946 (excluding 2025), but it's a near-halving of the tariff burden. If you're an importer, your CFO's phone is already ringing. There's somewhere between $130 billion and $175 billion in potential refunds sitting in government accounts, and the clock is ticking on who gets that money back.
This is the most consequential trade law decision in modern American history. And what matters right now isn't the constitutional theory. It's what you do about it.
The Ruling: What the Court Actually Said
The case consolidated two challenges: Learning Resources, Inc. v. Trump (No. 24-1287) and Trump v. V.O.S. Selections, Inc. (No. 25-250). Argued November 5, 2025. Decided today.
The vote was 6-3, but the majority wasn't a clean split. Understanding the fracture matters for what comes next.
The core holding (all six justices agreed): IEEPA's grant of authority to "regulate" imports under 50 U.S.C. Section 1702(a)(1)(B) doesn't authorize the president to impose tariffs. Period. "Regulate" doesn't mean "tax." Six justices. No ambiguity on the bottom line.
The reasoning split three ways. Roberts, joined by Gorsuch and Barrett, invoked the major questions doctrine: if Congress wants to hand the president the power to make decisions of "vast economic or political significance," it has to say so clearly. IEEPA doesn't come close. Kagan, joined by Sotomayor and Jackson, concurred but refused to reach for the major questions doctrine. Her reasoning was sharper: "It is not just that the Government's arguments fail to satisfy an especially strict test; it is that they fail to satisfy the normal one." Gorsuch wrote separately to flag nondelegation concerns. Jackson added a concurrence grounded in IEEPA's legislative history, showing Congress intended the statute for freezing assets and controlling financial transactions, not taxation.
The dissent. Justice Kavanaugh, joined by Thomas and Alito, argued the majority was drawing a distinction without a real difference. Kavanaugh wrote: "In essence, the Court today concludes that the President checked the wrong statutory box by relying on IEEPA rather than another statute to impose these tariffs." Thomas wrote separately to argue that "neither statutory text nor the Constitution provide a basis for ruling against the President."
Our read: the 6-3 bottom line is clear and final. But only three justices (Roberts, Gorsuch, Barrett) relied on the major questions doctrine to get there. Kagan's trio reached the same result on plain statutory interpretation alone. That split matters for future executive power cases, because the major questions doctrine didn't become binding precedent with six votes behind it. For tariff purposes, though, none of that matters. IEEPA tariffs are dead.
What Dies: Every IEEPA Tariff Is Gone
The ruling invalidates every tariff imposed under IEEPA authority. That's a lot of tariffs. Here's the complete list:
| Tariff | Rate | Status |
|---|---|---|
| Liberation Day baseline tariff | 10% on all imports | Invalidated |
| Reciprocal country-specific tariffs | Varied (up to 145% on China) | Invalidated |
| Fentanyl tariff, China | 20% (on top of reciprocal) | Invalidated |
| Fentanyl tariff, Canada | 25% | Invalidated |
| Fentanyl tariff, Mexico | 25% | Invalidated |
| De minimis exemption suspension | Eliminated $800 duty-free threshold | Invalidated |
| Secondary sanctions tariff, Iran oil | 25% | Invalidated |
| Secondary sanctions tariff, Russia oil | 25% | Invalidated |
| Secondary sanctions tariff, Venezuela oil | 25% | Invalidated |
| Secondary sanctions tariff, Cuba oil | Framework announced, rates pending | Invalidated |
That's more than 60% of total tariff revenue from trade enforcement actions in 2025, according to NBC News. Gone. Immediately. CBP has to stop collecting these duties today.
The de minimis piece deserves a callout. The suspension of the $800 small-package exemption was imposed under IEEPA. It's invalidated too. If you're an e-commerce company, or any business that relies on low-value direct-to-consumer shipments from overseas, the $800 threshold is back.
What Survives: The Tariffs That Aren't Going Anywhere
Don't mistake this for a return to free trade. Significant tariffs remain under separate legal authorities the Court didn't touch.
| Tariff | Rate | Authority |
|---|---|---|
| Steel | 50% | Section 232 (Trade Expansion Act of 1962) |
| Aluminum | 50% | Section 232 |
| Automobiles | 25% | Section 232 |
| Copper | 50% | Section 232 |
| Semiconductors (narrow) | 25% | Section 232 |
| Timber/Lumber | 10-25% | Section 232 |
| China legacy tariffs | 7.5-25% on ~$370B of goods | Section 301 (Trade Act of 1974) |
If you import steel, aluminum, cars, copper, or Chinese goods covered by Section 301, your cost structure hasn't changed at all. The post-ruling effective tariff rate of 9.1% is still historically elevated. This ruling clears out the IEEPA layer; everything else stays.
The $130 Billion Refund Question
This is the part most importers care about right now.
As of December 2025, CBP had collected approximately $129 to $130 billion in IEEPA tariff deposits from 301,000 importers across more than 34 million entries. The Penn-Wharton Budget Model estimates total refunds at risk exceed $175 billion when you include collections through February 2026 plus statutory interest.
Treasury Secretary Bessent has stated that the Treasury will refund IEEPA tariffs if required by the Court. The Court of International Trade (CIT) confirmed authority to order reliquidation. And the government previously stipulated it won't oppose reliquidation for plaintiffs who filed Section 1581(i) actions.
That last sentence is everything. Read it again.
The government agreed not to fight refunds for companies that filed protective litigation. Over 2,000 complaints were filed, with filings accelerating after Costco's high-profile suit. Those cases represent more than $60 billion in collective refund claims.
But here's the gut punch: importers who did NOT file protective protests or lawsuits before their entries liquidated may be permanently barred from recovery. Entries started liquidating in December 2025 and January 2026. If your entries liquidated and you didn't file, the Supreme Court ruling alone may not save you. The "We Pay the Tariffs" coalition is calling for "full, fast, and automatic" refunds, and CBP has said it is "prepared to waive deadlines" that would otherwise bar importers. But nothing is guaranteed.
Kavanaugh's dissent warned the refund process "is likely to be a mess." He's probably right about that, whatever you think about his legal analysis. Refunding $130 billion-plus would hit an already-projected $1.9 trillion deficit. Treasury would need to draw down cash reserves, delay other payments, or seek supplemental appropriations.
The refund timeline: weeks to months for initial CIT processing as the court lifts its stay and works through hundreds of claims. Full resolution for all 34 million entries? Years. And CBP identified over 24,000 customs bond insufficiencies valued at nearly $3.6 billion from inflated tariff costs, adding another layer to the unwind.
If you're an importer and you haven't talked to your customs broker today, stop reading this and call them. Seriously. Then come back.
What Comes Next: The Administration's Backup Plan
President Trump called the ruling a "disgrace" during a meeting with governors and said he has a "backup plan." Trade adviser Peter Navarro said in December 2025 that "even if the Supreme Court disagrees with us, we have a backup plan that'll get these things in place right away."
Treasury Secretary Bessent acknowledged the alternative authorities would make it "more difficult for the president to use tariffs as a negotiating tool" but expressed confidence they can rebuild tariff revenue. Here are the options.
Section 122 (Trade Act of 1974): The quick-and-dirty bridge. This lets the president impose tariffs to address trade imbalances without an investigation. Sounds powerful. It's not. Section 122 is capped at 15% and limited to 150 days. It's never been used. Expect legal challenges the moment it's invoked. But it could work as a short-term bridge while the administration pursues other paths. Watch for this within days.
Section 301 (Trade Act of 1974): The heavyweight, but slow. Section 301 authorizes the U.S. Trade Representative to investigate and respond to unfair foreign trade practices. No limits on tariff rates, and tariffs can last four years (with extensions). The catch: it requires petition review, public hearings, findings, and recommendations. That process typically takes at least nine months. You can't snap your fingers and get Liberation Day back.
Section 232 (Trade Expansion Act of 1962): Expanding what's already there. The administration already has nine pending Section 232 investigations covering pharmaceuticals, critical minerals, aircraft, drones, polysilicon, wind turbines, trucks, robotics, and medical supplies. Each could produce new tariffs on a national security basis. But "national security," even broadly defined, can't cover everything. You're not going to get a national security tariff on sneakers.
Congressional legislation: Theoretically possible, practically unlikely. Trump could ask Congress to explicitly grant broader tariff authority. But with slim Republican majorities in both chambers, passing new tariff legislation would require bipartisan support or reconciliation. Neither path is straightforward.
Georgetown Professor Kathleen Claussen offered what we think is the most honest assessment: "It's hard to see any pathway here where tariffs end... I am pretty convinced he could rebuild the tariff landscape he has now using other authorities." Renaissance Macro's Neil Dutta echoed that: "I don't think we have heard the last from Trump and tariffs."
Our read: expect Section 122 within days as a 150-day bridge. Section 301 investigations will launch in parallel. New Section 232 tariffs will trickle in over months. The tariff regime won't be rebuilt overnight, but don't assume it's permanently gone.
What This Means at the Board Table and on the Deal Sheet
If you're heading into a board meeting in the next 30 days, your directors will ask three questions: What's our net exposure now versus six months ago? Are we getting refund money back? What happens when tariffs get reimposed under different authority? Have answers before you walk in.
For companies in active M&A, the import cost assumptions in your models just shifted. Supply chain reps and warranties in purchase agreements need a fresh look. Indemnification provisions around tariff exposure should be on the table. If you signed a deal in the last nine months with tariff-adjusted pricing, both sides are going to want to revisit those numbers.
Pricing and procurement teams: if you raised prices to absorb IEEPA tariffs, competitive pressure to lower them just intensified. But don't drop prices until you've modeled the reimposition risk. A 150-day Section 122 bridge tariff at 15% changes the math. So does a potential Section 301 tariff nine months from now. Scenario planning, not knee-jerk reactions.
Practical Takeaways
These are the actions your team can assign this week:
- Audit your IEEPA tariff exposure immediately. Pull every entry from the past 12 months and identify which duties were paid under IEEPA authority versus Section 232 or Section 301. This is the foundation for every other decision.
- Determine your refund eligibility. If your company filed a Section 1581(i) complaint or a protest before entries liquidated, you're in a strong position. If you didn't, talk to your customs broker and trade counsel today about alternative recovery paths, including whether CBP's announced deadline waivers apply to you.
- Model the new cost structure, with scenarios. Build three models: (a) current post-ruling costs, (b) costs with a 15% Section 122 bridge tariff, and (c) costs assuming full Section 301 reimposition in 9 to 12 months. Present all three to your CFO.
- Review your supply chain contracts. Check for tariff pass-through provisions, force majeure clauses, and price adjustment mechanisms. If your contracts allocated IEEPA tariff costs to counterparties, those provisions may need renegotiation.
- Brief your board on refund timing and cash flow impact. If your company is owed significant refunds, that cash is real but the timeline is uncertain. Don't budget it as Q1 revenue. Model it as a windfall arriving in Q3 or later.
- Reassess sourcing decisions made under IEEPA pressure. If you shifted supply chains away from China, Canada, or Mexico specifically because of IEEPA tariffs, evaluate whether those moves still make economic sense. But factor in reimposition risk before reversing course.
- Update M&A and investment models. If you're acquiring, investing in, or selling an import-dependent business, the tariff assumptions in your deal model changed today. Rerun the numbers.
- Watch CBP guidance daily. CBP will issue guidance on stopping IEEPA collections and processing refunds. Watch for Cargo Systems Messaging Service (CSMS) alerts and Federal Register notices. The first few days of operational guidance will shape how fast the unwind moves.
What We're Watching
CIT refund processing. The Court of International Trade will lift its stay and begin processing the 2,000-plus refund claims filed since November 2025. The speed of this process sets the tone for everything that follows.
Section 122 bridge tariffs. We expect the administration to invoke Section 122 within days. Watch the Federal Register. A 15% tariff for 150 days changes the short-term calculus for importers deciding whether to accelerate shipments.
Section 301 investigation launches. The USTR will likely announce new Section 301 investigations against major trading partners. The timing and scope will signal how aggressively the administration plans to rebuild the tariff wall.
Congressional response. Watch the Senate Finance Committee and House Ways and Means Committee for proposed legislation, either granting new tariff authority to the executive branch or constraining it further. The Yale Budget Lab estimates post-ruling tariff policy raises roughly $1.2 trillion over 10 years, about half what it would have been with IEEPA tariffs intact. That revenue gap will force hard conversations about the reconciliation bill.
International trading partner reactions. The EU is "carefully analyzing" the ruling. Countries that made concessions under IEEPA tariff pressure may reconsider those deals. Canada and Mexico may lift retaliatory tariffs. China's response will be the most consequential, and we probably won't see it for weeks.
The tariffs aren't gone. They're shapeshifting.
Today's ruling took away the fastest, broadest tool in the president's tariff toolbox. That matters for the next 150 days and arguably for the next nine months. But the administration has backup authorities, nine active Section 232 investigations, and a stated determination to rebuild.
For now, the immediate task is concrete. Figure out what you're owed. Model what you'll owe next. Prepare your board for a trade landscape that just got a lot more uncertain and a lot more interesting.
We'll be updating this analysis as CBP guidance drops and the reimposition strategy becomes clearer. This story isn't over. It's just getting started.