The 10% Section 122 Tariff Sunset Clause: Why Chemical Supply Contracts Need Adjustment Language Before July 2026

The U.S. Section 122 tariff created a temporary 10% import surcharge beginning February 24, 2026, giving chemical importers a short period of relatively predictable tariff treatment.

That predictability ended on July 24, 2026, when Section 122 reached its statutory 150-day limit and expired. It was replaced immediately by a new two-tier Section 301 forced-labor tariff structure, meaning importers did not simply return to pre-February tariff conditions.

For chemical buyers negotiating annual supply contracts during 2026, the episode highlights a broader procurement lesson: tariff assumptions should not be hard-coded into long-term pricing without an adjustment mechanism.

This is particularly important for products where tariffs can materially change landed cost and where China-specific Section 301 duties may continue to apply based on the relevant HTS classification.

Why Section 122 Created Contract Risk

Section 122 temporarily imposed a flat 10% surcharge on many imports.

For buyers, this created a relatively simple pricing environment:

Product Cost + Base Duty + 10% Section 122 Surcharge + Logistics Costs

The problem was that the surcharge had a defined expiration mechanism.

Section 122 has a 150-day statutory limit, meaning its continuation beyond that period required congressional action rather than unilateral presidential extension. Congress did not extend the measure, and it therefore expired on July 24.

A supply contract written around a fixed 10% tariff assumption could therefore become commercially misaligned when the tariff regime changed.

The Important Change: Section 122 Expired, But Tariff Exposure Did Not Disappear

The end of Section 122 did not mean chemical importers automatically returned to ordinary MFN duty rates.

A new Section 301 forced-labor tariff took effect on July 24, with rates of 10% or 12.5% depending on the affected economy.

This means procurement teams should distinguish between:

• The expired Section 122 surcharge

• Existing MFN/base duties

• China-specific Section 301 duties

• The new Section 301 forced-labor tariff

• Any applicable Section 232 measures

• Trade-agreement preferences

• Product-specific exclusions

The actual landed tariff therefore depends on the country of origin and HTS classification, rather than a single universal percentage.

China Requires Separate Attention

China is particularly important for chemical procurement because existing China-specific Section 301 measures remain active for covered HTS classifications.

The 25% Section 301 rate applies to products within the relevant enumerated tariff lists; it is not a blanket 25% charge on every chemical imported from China.

For example, current tariff data shows certain chemicals in HTS Chapter 28 and Chapter 38 carrying the additional 25% China Section 301 duty.

This distinction matters when negotiating contracts because two chemically similar products can potentially face different tariff treatment depending on their exact HTS classification and applicable Chapter 99 provisions.

Why Tariff-Adjustment Clauses Matter

Chemical supply contracts frequently run for six months, one year, or longer.

During that period, governments can change:

• Tariff rates

• Tariff exclusions

• Country-specific measures

• HTS classifications

• Trade agreements

• Sanctions

• Customs requirements

A fixed delivered price therefore transfers tariff-policy risk to whichever party absorbs the change.

A tariff-adjustment clause can provide a mechanism for recalculating the price when government-imposed import duties change.

Instead of:

Fixed delivered price for the entire contract period

the agreement can establish:

Base product price + agreed logistics assumptions + applicable statutory duties, with adjustments when government-imposed duties materially change.

Legal drafting should be handled by qualified counsel, but the commercial principle is straightforward: separate the supplier's controllable price from externally imposed tariff changes.

What a Practical Adjustment Mechanism Can Address

Procurement teams can discuss contract language covering several variables.

1. New Tariffs

If a new import duty is introduced after the contract is signed, the parties can establish how the additional cost is allocated.

2. Tariff Reductions

The mechanism should work in both directions.

If a tariff falls or an applicable surcharge expires, the buyer should know whether the resulting savings are passed through.

3. Exclusions

If the product receives a tariff exclusion, the contract can specify how the lower duty affects the delivered price.

4. HTS Reclassification

Where tariff treatment changes because of an official classification determination, the contract can establish a process for reviewing the price.

5. Country-of-Origin Changes

If the supplier changes manufacturing origin, the parties may need to reassess the applicable tariff structure.

Build a Landed-Cost Formula Into Procurement

For tariff-sensitive chemicals, procurement teams can model contracts around total landed cost rather than the product quotation alone.

A simplified framework is:

Landed Cost = Product Price + Base Duty + Applicable Trade Measures + Freight + Insurance + Customs Fees

The exact calculation depends on the product and import circumstances.

The key point is that tariff exposure should be visible rather than hidden inside a fixed delivered price.

What Buyers Should Review in Existing Contracts

Companies that signed chemical contracts earlier in 2026 should review whether their agreements account for the end of Section 122.

Important questions include:

• Does the contract specify who bears tariff changes?

• Is the price based on a particular HTS classification?

• Does the agreement identify country of origin?

• Are tariff exclusions addressed?

• Does the contract provide for both increases and decreases?

• Can either party request a price review after a regulatory change?

• Is there a termination or renegotiation mechanism for major tariff changes?

Contracts without these provisions can leave buyers and suppliers exposed to unexpected margin changes.

Procurement Strategy After the Sunset

The expiration of Section 122 also reinforces the value of supplier diversification.

For tariff-sensitive chemical categories, buyers can compare:

• China

• India

• South Korea

• Southeast Asia

• Europe

• Middle East

• Domestic U.S. supply

The comparison should include more than headline tariff rates.

Procurement teams should evaluate:

• Product cost

• Applicable duties

• Freight

• Lead time

• Quality

• Supplier reliability

• Minimum order quantities

• Inventory requirements

• Regulatory compliance

A lower tariff does not necessarily produce a lower landed cost if the alternative supplier has substantially higher product or logistics costs.

Contracting for Future Uncertainty

The Section 122 episode demonstrates why tariff clauses should be designed for change, rather than one specific tariff.

A stronger contract framework can define:

Baseline Price → Current Tariff → Trigger Event → Documentation → Price Adjustment → Review Mechanism

This provides both parties with a clearer process when trade policy changes.

It also reduces the need to renegotiate an entire annual contract every time the U.S. government modifies an import measure.

Competitive Intelligence for Chemical Buyers

Procurement teams should monitor tariff developments alongside traditional chemical market intelligence.

Useful indicators include:

HTS Classification

Confirm the exact classification of the imported chemical.

Country of Origin

Track where the material is actually manufactured, not simply where it is shipped from.

Chapter 99 Measures

Review applicable Section 301, Section 232, and other tariff overlays.

Exclusions

Monitor whether existing exclusions are extended, modified, or allowed to expire.

Trade Policy

Track new U.S. tariff actions that could affect annual supply contracts.

This approach helps procurement teams identify tariff exposure before it becomes a pricing dispute.

Looking Ahead

Section 122 was always designed as a temporary tariff mechanism, and its expiration on July 24, 2026 demonstrates the importance of incorporating policy uncertainty into long-term chemical contracts.

The bigger lesson is not that chemical buyers should assume tariffs will rise or fall.

It is that tariff exposure should be contractually measurable and adjustable.

For chemical importers, annual supply agreements should clearly distinguish between the supplier's underlying product price and government-imposed trade costs.

As the U.S. tariff system continues to evolve, procurement teams that build transparent adjustment mechanisms into contracts can reduce disputes, improve landed-cost visibility, and make sourcing decisions with a clearer understanding of their actual exposure.

Key Takeaways

• The temporary 10% Section 122 tariff expired on July 24, 2026 after reaching its statutory 150-day limit.

• Its expiration did not mean importers simply returned to pre-February tariff conditions; a new Section 301 forced-labor tariff structure took effect.

• China-specific Section 301 duties remain applicable to covered HTS classifications and can stack with other applicable measures.

• Chemical supply contracts should distinguish product pricing from government-imposed duties.

• Tariff-adjustment clauses can establish how both tariff increases and reductions affect contract pricing.

• Buyers should review HTS classification, country of origin, exclusions, and Chapter 99 measures before finalizing annual contracts.

• Supplier diversification can reduce exposure to country-specific tariff and trade-policy changes.

• Landed-cost analysis should combine product price, tariffs, freight, and other import costs rather than relying on the quoted chemical price alone.

Sources

https://www.tariffstool.com/tariffs-on-chemicals | https://southernstarnavigation.com/global-trade-supply-chain-update-june-2026/ | https://keplerfreight.com/global-shipping-update-august-2026/