Can a Korean Supplier Increase Prices After the Contract Is Signed?

Short Answer

Generally, not without agreement. A Korean supplier cannot automatically increase the contract price simply because raw material costs, labor costs, exchange rates, transportation costs, energy prices, or production expenses increased after the contract was signed.

In most commercial contracts, the supplier remains bound by the agreed price unless the contract contains a price adjustment mechanism or the parties later agree to revise the price.

However, price adjustment disputes can become complicated in long-term supply relationships. The key issues often include whether the contract allows price adjustments, whether a later quotation or purchase order changed the price, whether the buyer accepted the revised price, whether the buyer requested scope changes, and whether the transaction falls within a regulated or public-contract framework.

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Why Do Price Adjustment Disputes Arise?

International supply contracts are often performed over months or years.

During that period, costs may increase because of:

• Raw material price increases
• Inflation
• Exchange-rate fluctuations
• Higher labor costs
• Energy price increases
• Transportation disruptions
• Tariffs or customs changes
• Supply chain shortages
• Government restrictions

The supplier may request a price increase, while the buyer may insist that the agreed contract price remains fixed.

In practice, the dispute is rarely just about whether costs increased. The more important question is who agreed to bear the risk of those cost increases.

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Key Issues in Price Adjustment Disputes

Issue 1: Does the Contract Include a Price Adjustment Clause?

The first question is whether the contract already addresses future price changes.

Some contracts contain:

• Raw material index clauses
• Currency adjustment clauses
• Inflation adjustment formulas
• Fuel or transportation surcharge provisions
• Annual price review procedures
• Renegotiation clauses
• Hardship clauses
• Change order mechanisms

If the contract contains a clear price adjustment formula, that mechanism will usually be the starting point.

The clause should also explain when the adjustment applies, what evidence is required, whether the adjustment is automatic or requires approval, and whether it applies retroactively or only prospectively.

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Issue 2: Is the Contract Price Fixed, Variable, or Estimate-Based?

Not every contract uses the same pricing structure.

The agreement may provide for:

• A fixed unit price
• A fixed total contract price
• Cost-plus pricing
• Index-linked pricing
• Estimated pricing
• Pricing subject to future quotations
• Pricing subject to annual review

Before deciding whether a supplier can request a higher price, the parties should first determine what pricing structure they actually agreed to.

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Issue 3: Did the Buyer Agree to the New Price Later?

A supplier generally cannot impose a unilateral price increase.

However, the parties may later agree to revised pricing through:

• Signed amendments
• Revised quotations
• Purchase orders
• Emails or other communications
• Repeated payments at the revised price
• Course of performance

The key issue is whether the buyer actually agreed to the new price.

Continued performance, revised purchase orders, or payment of higher invoices may be relevant evidence, but they do not automatically prove agreement in every case.

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Issue 4: Do Increased Costs Excuse Performance?

Increased costs do not automatically excuse performance or give the supplier a right to increase the price.

For example, higher raw material costs, shipping costs, labor costs, or exchange-rate losses may make performance less profitable, but that does not necessarily mean performance is legally impossible.

Unless the contract provides otherwise, ordinary commercial risks often remain with the party that agreed to perform.

A force majeure or hardship clause may be relevant, but its effect depends on the exact wording of the contract.

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Issue 5: Did the Buyer Change the Scope of Work?

Price increases are more likely to be justified where the buyer changes the scope of work.

Examples include:

• Revised specifications
• Engineering changes
• Additional testing
• New packaging requirements
• Accelerated delivery
• Higher quality standards
• Additional certification work
• Regulatory changes affecting the product

These situations should usually be handled through a formal change order process rather than an informal price increase.

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Issue 6: Could a Price Adjustment Clause Affect Damages?

A price adjustment clause may matter not only during performance, but also in a later damages dispute.

For example, if a supplier fails to deliver and the buyer purchases substitute goods at a higher price, the buyer may claim the price difference as damages.

However, if the original contract already allowed price increases due to material cost increases, a dispute may arise over whether the buyer would have had to pay the higher adjusted price even if the supplier had performed.

In that situation, the price adjustment clause may affect causation, damages calculation, and the recoverable amount.

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Issue 7: Is the Transaction Subject to Special Pricing Rules?

Most private B2B contracts are governed primarily by the contract itself.

However, some transactions may be subject to special pricing or adjustment rules, especially where they involve:

• Public procurement
• Government contracts
• Subcontracting arrangements
• Consignment or manufacturing transactions
• Raw material price linkage systems
• Regulated industries

Foreign companies should not assume that all pricing disputes are governed only by general contract language. The transaction type may affect the analysis.

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Common Price Adjustment Disputes

Price adjustment disputes commonly involve questions such as:

• Can raw material price increases justify a higher contract price?
• Can exchange-rate fluctuations shift commercial risk?
• Did the buyer accept revised quotations?
• Does payment of higher invoices show agreement?
• Can a supplier stop delivery unless the price is increased?
• Does a force majeure or hardship clause apply to cost increases?
• Can a buyer claim damages based on substitute purchases if the original price would have been adjusted anyway?

These disputes often depend more on the contract wording, correspondence, and course of performance than on the cost increase itself.

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Practical Drafting Tips

Foreign companies contracting with Korean suppliers should consider including provisions addressing:

• Whether prices are fixed or adjustable
• Raw material index formulas
• Currency adjustment mechanisms
• Inflation or transportation surcharge clauses
• Annual price review procedures
• Hardship or renegotiation procedures
• Change order requirements
• Approval authority for price changes
• Evidence required to support adjustments
• Effective date of price changes
• Whether adjustments apply retroactively
• Temporary pricing during disputes
• Relationship between price adjustment and damages

Well-drafted pricing provisions reduce uncertainty when market conditions change unexpectedly.

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Conclusion

A Korean supplier cannot automatically increase prices after the contract is signed simply because its costs have increased.

The outcome usually depends on the agreed pricing structure, any price adjustment clause, whether the buyer later accepted revised pricing, whether the buyer changed the scope of work, and whether special regulatory or public-contract rules apply.

For foreign companies, price adjustment clauses should be drafted carefully at the beginning of the relationship. They should explain not only when prices may change, but also how changes are calculated, approved, documented, and applied if a dispute arises.

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