Good day. This is LIAN GLOBAL LOGIS.

If you have personally managed cost negotiations to shave 1–2% from procurement throughout the quarter, you have likely felt acutely how a single line of the 10% emergency tariff suddenly imposed by the United States in May 2026 can erase an entire quarter's operating profit. The US Administration invoked Article 122 of the Trade Act of 1974 (미국 무역법 제122조) on a May 2026 effective date, imposing a uniform 10% emergency tariff on all global imports, with a concurrent review proposal for a 15% increase within 150 days pending improvement in the trade balance. According to trend data released in May 2026 by the Korea International Trade Association and the Ministry of Trade, Industry and Energy, the first invoice impact is most acute in product categories where Korea's share of US imports exceeds 18%—automotive components, electronics, and general machinery.

This shift destabilizes the shipper's quarterly invoice on two fronts. First is the tariff unit cost itself: +10 percentage points (or +15 percentage points if increased), and second is the lead-time loss incurred during customs clearance delays, document reinforcement, and HS code reclassification. For small and mid-sized manufacturers with average operating margins of 8–12%, a 15 percentage point tariff is not merely a cost increase—it is an event that collapses the break-even point itself.

Three Core Changes in Section 122 10% Emergency Tariff

Section 122 has seen virtually no actual invocation since its enactment in 1974. This May 2026 activation differs structurally from prior Section 301 and 232 actions in that it takes immediate effect by executive order without congressional consent.

First, the scope of application covers all product categories. Unlike Section 301, which was limited to specific Chinese-origin goods, Section 122 imposes a blanket 10% levy regardless of origin or product type. Even goods eligible for Korea-US FTA preferential rates incur the Section 122 emergency tariff as a separate addition.

Second, the increase trigger is indexed to the US trade deficit metric. When the monthly trade deficit figure released by the US Department of Commerce exceeds the baseline, an automatic +5 percentage point increase review is activated. Market consensus places the probability of a 15% increase between July and August 2026 at approximately 60%.

Third, there is no retroactive application, but the basis is the customs entry date, not the shipment date. Cargo loaded before May but cleared through US ports after May becomes subject to the 10% tariff. Multiple cases of this burden being passed directly to shippers have been reported since late May 2026 for containers awaiting clearance at LA and Long Beach ports.

Infographic showing the 10% emergency tariff imposition under US Trade Act Section 122 Section 122 applies as a blanket addition regardless of origin or product category.

Cost and Time Impact Analysis — Quarterly P&L Simulation

As tariffs escalate incrementally from 10% to 15%, quantitative comparison of how SME shippers' quarterly P&L actually moves is essential. Below is a standard simulation based on USD 500,000 quarterly US export volume and 10% operating margin assumption.

Item	Pre-Section 122 (2026-04)	10% Activation (2026-05)	15% Increase Scenario (2026-07 Projected)	Shipper Impact
Tariff Rate	0–2.5% (MFN average)	+10 pp addition	+15 pp addition	Unit price schedule rewrite required
Quarterly Tariff Burden	Approx. USD 10,000	Approx. USD 60,000	Approx. USD 85,000	Quarterly +USD 50,000–75,000
Average Operating Profit	USD 50,000	USD 0	USD -25,000	Break-even collapse
LA Port Clearance Lead Time	Average 3–5 days	Average 7–10 days	Average 10–14 days (document reinforcement)	Inventory days +5–9
Exchange Rate Assumption	USD/KRW 1,330	Same	Same	—

For a shipper dispatching 50 containers quarterly (approximately USD 500,000), the 10% bracket alone generates approximately KRW 66.5 million in additional quarterly costs, and a 15% increase exceeds KRW 100 million. Simultaneously, the 5–9 day increase in customs clearance lead time activates the Liquidated Damages (LD) clause in US trade contracts. D2C shippers tied to Amazon FBA intake schedules face separate intake delay penalties.

Quarterly P&L simulation—margin comparison across 10% and 15% tariff brackets Scenario for 50 TEU quarterly shipper: +KRW 100 million burden.

Tariff Defense Options A, B, and C by Situation

The most effective defense strategy varies depending on the shipper's circumstances. Three scenarios are outlined below.

Option A — Mexico Transshipment (USMCA Utilization)

Who uses it: Shippers who previously exported components or semi-finished goods directly to the US and can add secondary processing operations at Mexican maquiladora parks or IMMEX program-registered factories. If Korean primary-processed goods are sent to Mexico for secondary processing and meet USMCA origin criteria, there is potential for partial or full exemption from the Section 122 emergency tariff upon US entry (variation depends on product-specific origin rules).

What you gain and lose: You can avoid 10–15 percentage points of tariff burden, but incur Mexican subcontract processing costs (USD 300–700 per container), additional Mexico customs clearance and inland transport lead time of 12–16 days, and Mexican peso exchange rate risk.

Estimated cost and time: Additional logistics cost per container USD 500–900; total lead time Busan–Mexico–LA approximately 35–45 days.

Option B — US Bonded Warehouse Dwell

Who uses it: Shippers whose US trade partners receive split shipments, or those uncertain about the timing of tariff increases and wish to defer the customs clearance decision itself. After bonded warehouse intake, storage within US territory is permitted for up to five years, and the tariff rate at the time of formal import clearance applies.

What you gain and lose: You can adjust customs clearance timing based on Section 122 increase or mitigation timing, and some cargo can be re-exported to third countries after only US labeling or repackaging, making tariffs eligible for refund (Drawback) or exemption. However, warehouse fees (USD 0.6–1.2 per square foot monthly) and bonded guarantee insurance premiums accumulate.

Estimated cost and time: Bonded warehouse monthly storage USD 350–600 per container; customs clearance timing flexibility up to five years maximum.

Option C — FTA and Origin Redesign plus Split Shipments

Who uses it: Shippers holding goods eligible for Korea-US FTA preferential rates but with incomplete origin documentation, and those consolidating multiple product lines to a single trade partner.

What you gain and lose: HS code reclassification and strengthened origin documentation (KO form) alone can reduce the MFN rate to 0%, maintaining an effective rate of 10–15% even after Section 122 addition. However, establishing an internal origin management system requires 1–2 months, and post-verification risk also increases.

Estimated cost and time: Origin management system setup KRW 5–15 million; split shipment freight per container +USD 150–300.

Practitioner Action Checklist

Items the shipper must directly verify and execute this month. Departmental responsibility is noted.

Re-confirm HS codes and MFN rates for all US export products, Korea-US FTA preferential rates, and prepare a new effective tariff schedule after Section 122 addition (coordinate with customs broker, this week). Logistics and Procurement, jointly
For shipments loaded after May 2026, verify the Entry Date of containers awaiting clearance at LA, Long Beach, and Seattle ports, and reach prior agreement with trade partners on 10% applicability. Sales
Review price adjustment clauses and tariff allocation provisions in existing US trade contracts, and renegotiate allocation ratios for a 15% increase. Sales and Legal
For shippers dispatching 50 TEU or more quarterly, obtain quotes from at least two Mexico IMMEX-registered subcontract partners and evaluate feasibility of meeting USMCA origin criteria. Logistics and Procurement
Compare bonded warehouse operator quotes from 2–3 providers and prepare a consolidated table of per-container monthly storage and bonded guarantee insurance costs. Logistics
Confirm whether you hold Certified Exporter status for self-issuance of FTA origin certificates; if not, complete the Customs Service self-issuance procedure by next quarter. Finance and Logistics
Overlay Amazon FBA intake schedules with Section 122 customs delay scenarios and separately manage SKUs exposed to LD penalties. E-commerce Operations
Prepare quarterly P&L simulations for both 10% and 15% scenarios and share with the CFO reporting line (by month-end). Finance

Near-Term and Medium-Term Implications

In the near term, whether a 15% increase is activated between June and August 2026 is the largest variable in quarterly P&L. Since the Section 122 increase trigger is reviewed each month when the US Department of Commerce releases trade deficit data, shippers must operate customs clearance decisions with precision, leveraging the time gap between increase announcement and clearance scheduling.

Medium-term, it is time to redesign the export structure itself away from dependence on a single channel or port. Mexico transshipment, bonded warehouse dwell, and FTA origin reinforcement remain effective defense mechanisms against future trade remedies—Section 301, Section 232, anti-dumping, and countervailing duties—even if Section 122 is eventually relaxed.

In a US export environment increasingly buffeted by political variables, what SME exporters need most is not simple transportation but proactive response capability that integrates tariff unit pricing, origin, and customs clearance timing. LIAN GLOBAL LOGIS's US tariff defense consulting begins precisely at this point. We invite you to jointly design Section 122 emergency tariff scenarios, Mexico transshipment logistics networks, and bonded warehouse dwell strategies aligned with your quarterly P&L structure.