After IEEPA Fell: Section 122 at 15%, Refund Chaos, and the 150-Day Clock

The Supreme Court's 6-3 decision in Learning Resources, Inc. v. Trump on February 20, 2026, didn't just strike down a tariff. It killed the legal foundation of the entire trade war. Every IEEPA-based tariff, the 10% baseline, the country-specific reciprocal rates, the China fentanyl surcharges, the punitive rates on Canada and Mexico, all of them are gone. Hours later, Trump signed a replacement under Section 122 of the Trade Act of 1974. Initially 10%, raised to the statutory maximum of 15% the following day.

We've been running the numbers on this nonstop since the ruling dropped. And the second-order effects are wilder than the headlines suggest. A flat 15% global rate sounds simpler than the old regime. In practice, it creates winners nobody expected, losers who thought they'd negotiated safety, a $175 billion refund question, and a 150-day countdown clock that makes long-term planning nearly impossible.

Here's what actually happened, who it helps, who it hurts, and what you should do about it.

What the Court actually struck down

Chief Justice Roberts wrote the majority opinion. The core holding: IEEPA does not authorize the President to impose tariffs. Roberts rejected the government's argument that "regulate" and "importation" in the statute encompassed taxation, noting those two words were separated by 16 others in the actual text and couldn't carry that much weight.

The reasoning came down to three points. First, "regulate" has never meant "tax" anywhere in the U.S. Code. The government couldn't find a single statute where regulatory power included taxing power. Second, if "regulate" did include taxation, IEEPA would be partially unconstitutional because it also grants power to regulate "exportation," and the Constitution's Export Clause expressly forbids taxing exports. Third, Roberts cited Gibbons v. Ogden from 1824 to establish that tariffs are a branch of the taxing power reserved to Congress.

Three justices (Roberts, Gorsuch, Barrett) went further and applied the major questions doctrine, holding that a delegation of this economic and political significance requires clear Congressional authorization. Trump's own legal brief had argued the nation's wealth hung in the balance. Roberts turned that admission against the government.

So what's gone? Everything imposed under IEEPA:

• The 10% universal baseline tariff
• All country-specific reciprocal rates from Liberation Day (Vietnam at 46%, Thailand at 36%, EU at 20%, Japan at 24%, and roughly 60 other countries)
• China fentanyl surcharges (20% combined)
• The 25-35% tariffs on Canada and Mexico
• The 40% tariff on Brazil

What stays: Section 301 tariffs on China (7.5-100% depending on product list), Section 232 tariffs on steel, aluminum, autos, copper, and lumber (25-50%), Section 201 tariffs on solar panels, and all anti-dumping and countervailing duties.

The Section 122 replacement: untested, constrained, temporary

Section 122 of the Trade Act of 1974 had never been used in its 52-year existence. Congress created it in 1974, in the aftermath of Nixon's use of TWEA for emergency tariffs, as a constrained tool for balance-of-payments crises during the Bretton Woods fixed-exchange-rate system.

The constraints are severe and they define what importers are dealing with now.

15% ceiling. The statute caps any surcharge at 15% ad valorem. That's a dramatic drop from IEEPA rates that reached 145% on Chinese goods.

150-day limit. Tariffs expire automatically on approximately July 24, 2026, unless Congress passes legislation to extend them. Not a resolution. Not a vote to override. Actual new legislation.

Nondiscrimination requirement. The tariff must apply broadly and uniformly. No country-specific rates. That eliminates the administration's primary negotiating lever.

Balance-of-payments justification. The President must find "fundamental international payments problems." Multiple economists say this is legally baseless under modern floating exchange rates. Peter Berezin of BCA Research put it bluntly: a balance-of-payments deficit cannot exist when you have a flexible exchange rate. The statute was functionally obsolete before it was even signed into law, since the U.S. abandoned fixed exchange rates in 1973.

Stacking rules. Section 122 tariffs stack on top of Section 301 and MFN duties but do not stack on Section 232 tariffs. Products covered by Section 232 (steel, aluminum, autos, copper, lumber, semiconductors) are exempt from Section 122. Certain electronics (smartphones, laptops, tablets), pharmaceuticals, energy products, critical minerals, USMCA-qualifying goods, and CAFTA-DR textiles are also exempt.

Winners and losers: the flat rate reshuffles everything

The shift from differentiated IEEPA rates to a uniform 15% creates dramatic winners and unexpected losers. Countries that never negotiated bilateral deals, and were paying full Liberation Day rates, see the largest reductions. Countries that secured favorable deals below 15% now face increases.

Biggest winners. Bangladesh drops from 37% to 15% (a 22-point reduction). Brazil collapses from a punitive 50% to 15% (35 points). Sri Lanka, Myanmar, Laos, Madagascar, and Lesotho all see reductions exceeding 25 percentage points. These countries lacked the diplomatic leverage to negotiate deals but now benefit from the uniform floor.

Vietnam, the centerpiece of most "China+1" strategies, moves from its negotiated 20% deal rate to 15%. Thailand, Cambodia, and Indonesia similarly drop 4-5 points from their deal rates. India, which had negotiated down to 18% just eight days before the ruling, now faces 15%.

Biggest losers. The United Kingdom negotiated one of the best deals at 10%. Now it faces a 5 percentage point increase to 15%. The Gulf states (UAE, Saudi Arabia, Qatar), Singapore, and Australia, all at the 10% baseline, face the same increase. Every country previously subject only to the 10% IEEPA baseline now pays more under Section 122.

The counterintuitive complication. The EU, Japan, South Korea, and Taiwan had IEEPA deals that capped total duties at 15%, meaning the IEEPA surcharge was calculated as (15% minus MFN rate). Under Section 122, the 15% is additive to the MFN rate, not a cap. Italian ceramics with a 10% MFN rate went from 15% total (10% MFN + 5% IEEPA) to 25% total (10% MFN + 15% Section 122). That's a 10-point increase nobody anticipated. German industrial machinery with a 3% MFN rate rises from 15% to 18%. French wine goes from 15% total to approximately 17%.

For China, the impact is moderate. Section 301 tariffs (7.5-25% depending on product list) remain the dominant cost layer. A typical List 3 product faces roughly 43% total (25% Section 301 + 15% Section 122 + 3% MFN), down from approximately 45% under IEEPA. Non-Section 301 Chinese products drop to 15%, the same rate as every other country. That completely eliminates the tariff-based incentive to source elsewhere for those specific products.

Product-level chaos: when stacking gets complicated

The interaction of Section 122 with Section 301, Section 232, and MFN rates creates a tariff situation that defies easy calculation. We've run a few scenarios through MarginStack's calculator to show what we mean.

A $10 FOB Chinese toy (HTS 9503, Section 301 List 4A at 7.5%) previously faced roughly $4.05 in duties (40.5% effective rate: 7.5% Section 301 + 20% IEEPA fentanyl + 10% IEEPA reciprocal + 3% MFN). Post-ruling, duties drop to approximately $2.55 (25.5%: 7.5% Section 301 + 15% Section 122 + 3% MFN). That's $1.50 per unit in savings. Meaningful at scale.

A $10 FOB Vietnamese product drops even more. From $5.10 in duties (51%) to $2.00 (20%), saving $3.10 per unit. If you're sourcing from Vietnam, this is significant margin recovery.

The electronics exemption creates a stark paradox. A $1,200 iPhone from China enters at approximately 0% additional duty, exempt from both Section 122 and Section 301. A $15 Chinese children's toy pays 22.5%. A $500 piece of Chinese furniture pays 40% or more. This disproportionately burdens lower-income consumers who spend more on staple goods than high-end electronics.

Products with partial Section 232 coverage get messy fast. A Chinese washing machine with 40% steel content requires split-valuation: 50% Section 232 on the steel portion, 15% Section 122 on the non-steel portion, plus 25% Section 301 on the entire product. Two seemingly identical products can face vastly different total rates depending on material composition and HS code classification.

Then there's the bilateral deal situation. Approximately 20 trade deals negotiated under IEEPA are now legally inoperative. The administration insists deals "remain in force," but no Federal Register notice has reimplemented deal terms under Section 122. Indonesia's deal was negotiated at 19%, above the 15% Section 122 maximum, meaning it literally cannot be replicated under the new legal authority.

The fiscal crater: $1.9 trillion in lost revenue

The budgetary consequences are staggering. IEEPA tariffs were collecting approximately $500 million per day by January 2026, accounting for over half of all customs duties. Penn Wharton Budget Model estimates cumulative IEEPA collections reached $164.7 billion by January 2026. Total U.S. customs duties hit $264 billion in calendar year 2025, more than triple the $79 billion collected in 2024.

The Committee for a Responsible Federal Budget estimates the ruling will reduce revenues by $1.9 trillion through FY2036 and increase the national debt by $2.4 trillion on a conventional basis. Section 122 tariffs contribute only approximately $30 billion during their 150-day life. A fraction of what IEEPA was generating.

This directly threatens the fiscal architecture of the One Big Beautiful Bill Act (P.L. 119-21), signed in July 2025, which increased deficits by an estimated $4.2-4.7 trillion over ten years. J.P. Morgan calculated that tariff revenue was expected to offset $3.7 trillion of that cost. With roughly three-quarters of new tariff revenue now gone, the legislation's fiscal foundation has collapsed.

The refund question looms as an additional fiscal shock. Over 301,000 importers made more than 34 million entries subject to IEEPA tariffs. Penn Wharton estimates up to $175 billion in potential refund liability. The Supreme Court was silent on refund mechanics, leaving the process to the Court of International Trade. Justice Kavanaugh's dissent warned the process would be a "mess," and he's probably right. Importers who passed costs to consumers may receive windfalls, while consumers who bore the higher prices receive nothing.

Consumer relief: real but partial, and maybe temporary

Yale Budget Lab's post-ruling analysis shows the effective tariff rate dropped from 16.0% to 13.7% with Section 122 in place. Still the highest since 1941 excluding 2025. If Section 122 expires without replacement, the rate falls further to 9.1%.

The categories with the most IEEPA exposure: toys, games, and sporting equipment (over 90% IEEPA-related), furniture and home improvement (over 70%), and apparel and footwear (approximately 60%). These categories will see the most meaningful price relief. Steel, aluminum, and automotive products see no relief because Section 232 tariffs remain at 25-50%.

But price reductions will be slow and incomplete. Goldman Sachs estimates that by December 2025, approximately 55% of tariff costs had been passed through to consumers, expected to reach 70% by end of 2026. Walmart and other major retailers had already embedded price increases that show no signs of quick reversal.

The distributional impact remains regressive. Bottom-income households bear a tariff burden equal to approximately 1.1% of after-tax income, while top-income households bear only 0.4%. Lower-income consumers spend disproportionately on tariff-heavy categories like clothing, toys, and household goods.

The 150-day cliff

The most consequential number for every importer is 150 days. Section 122 tariffs automatically expire on approximately July 24, 2026, creating a hard deadline that dominates all planning decisions. It is unlikely that Congress would extend the tariff authority this year, with midterm elections around the corner.

The administration's bridge strategy is already visible. USTR announced accelerated Section 301 investigations covering most major trading partners. The Commerce Department has approximately 12 active Section 232 investigations (robotics, wind turbines, drones, pharmaceuticals, and others). Section 338 of the Tariff Act of 1930 is also being explored.

A "restart" loophole exists in theory: the administration could let Section 122 tariffs lapse, declare a new balance-of-payments emergency, and restart the 150-day clock. Nothing in the statute explicitly forbids serial re-invocations, but this would raise serious separation-of-powers concerns. With no judicial precedent (Section 122 has never been invoked before), the limits are entirely undefined.

Legal challenges to Section 122 itself are widely expected but face a timing paradox. The tariffs would lapse before any final ruling could be made, potentially mooting any case. The strongest attack vector is the balance-of-payments justification: under modern floating exchange rates, the balance of payments always balances by definition.

Implementation chaos: the transition period

CBP faces unprecedented operational challenges. The executive order ending IEEPA tariffs said agencies should stop collecting "as soon as practicable," with no fixed date. Until CBP issues formal CSMS guidance, importers must continue paying IEEPA tariffs or risk liquidated damages. Simultaneously, Section 122 tariffs begin February 24, creating a period where importers may need to post both sets of duties and seek IEEPA refunds later.

New HTS classifications under Subheading 9903.03.01 require line-by-line validation against two annexes. CBP's Automated Commercial Environment (ACE) system needs reprogramming. CBP had already identified over 24,000 customs bond insufficiencies valued at nearly $3.6 billion during the IEEPA regime. Bond requirements now shift again.

Companies that made reshoring investments based on IEEPA tariff levels face a reckoning. U.S. manufacturing shed 108,000 jobs in 2025 despite the tariff wall. Trade experts at Darden observed that the binding constraints are often labor availability, permitting, energy costs, and stability of demand, not simply the relative price of imports. The tariff whiplash reinforces a painful lesson: when policy can change overnight, firms treat it like a volatile input cost.

What Amazon FBA sellers should do right now

For FBA sellers sourcing from China, landed costs on a typical $10 FOB product drop from approximately $14.05 to $12.55. That's a 10.7% reduction in total cost. Vietnamese-sourced products see even larger savings, dropping from $15.10 to $12.00 (a 20.5% reduction). Run your specific products through our calculator to see the exact impact.

The de minimis exemption ($800 threshold) remains suspended under a separate executive order. Congress has also legislated its permanent elimination effective July 1, 2027. If you're competing against Temu and Shein sellers who rely on de minimis, that competitive advantage for FBA sellers with U.S.-based inventory continues.

Here's the short list of what to do.

Recalculate all your landed costs immediately. Use the new tariff structure. The duty stacking math has changed for every origin country.

Run ACE portal reports to identify all entries with IEEPA HTS codes eligible for refund. Contact your customs broker about the refund process and liquidation timelines. But do not count on refunds as a certainty, and beware scams (the U.S. Chamber of Commerce issued an explicit warning about fraudulent refund services).

Review your HS classifications. Proper reclassification could save you 5-15% in some cases. If you haven't verified your codes recently, now is the time. We wrote a full walkthrough on HS code lookup if you need it.

Place orders now to exploit the 150-day window, especially from non-China sources facing only 15% plus MFN. The window closes in July.

Hold prices stable for 2-4 weeks while monitoring competitor behavior rather than rushing to cut. Sellers with pre-tariff inventory in FBA warehouses hold the strongest margin position right now. Rather than matching price cuts immediately, consider reinvesting margin improvements into PPC spending to capture market share during the adjustment window.

Continue diversification plans. Section 122 is temporary. The administration is actively pursuing Section 301 and Section 232 investigations as replacement authorities. Whatever comes after July will likely be different again.

Build scenario plans for three outcomes: Section 122 expiration with no replacement, Congressional extension, or transition to Section 301/232 tariffs at potentially higher rates. The businesses that treat tariff volatility as a permanent feature rather than a temporary disruption will outperform those still waiting for stability to return.

Three things most analysis has missed

We'll close with three insights the mainstream coverage keeps glossing over.

First, the uniform 15% rate harms U.S. allies (UK, Gulf states, Australia) who negotiated favorable deals while benefiting adversaries like China. That's exactly the opposite of the administration's stated strategic intent.

Second, the EU, Japan, and South Korea may face higher total duties than under their IEEPA deals because Section 122's 15% is additive to MFN rates rather than a cap. If you import European goods, model this immediately. Italian, German, and French products likely cost more now, not less.

Third, the $175 billion refund liability is a fiscal time bomb. If processed quickly, it could provide a massive one-time cash injection to importers. But the administration has every incentive to delay, and the Supreme Court provided no roadmap for distribution. Do not plan around receiving refund money anytime soon.

The only certainty in U.S. trade policy right now is continued uncertainty. Use the tools you have, recalculate your costs, understand your duty stack, and plan for multiple outcomes. That's the best anyone can do.