Turkish Supplier Demands Additional Payment After Signing a Fixed-Price Contract: Must the Foreign Buyer Pay? 2026 Updated Guide

• A Turkish supplier demands additional payment after signing a fixed-price contract. Learn whether a foreign buyer must accept the increase, when hardship or contract adjustment may apply, and how to protect delivery and compensation rights in Turkey.

A foreign buyer may sign a fixed-price supply, manufacturing or purchase agreement with a Turkish supplier only to receive a later demand for additional payment because raw-material prices, labor costs, energy expenses, exchange rates, taxes or transportation costs have increased. The supplier may even state that production or delivery will stop unless the foreign buyer accepts a new price. However, a supplier’s increased costs do not automatically give it the right to rewrite an agreed fixed price unilaterally. The answer depends on the contract, governing law, price-adjustment provisions, force-majeure clauses, hardship provisions and whether exceptional circumstances satisfy the requirements for judicial adaptation or another remedy under Turkish law.

Is a Fixed Price Normally Binding?

As a starting point, contracts bind the parties according to their agreed terms. If the parties clearly agreed that specified goods would be supplied for a fixed price, the supplier cannot ordinarily increase that price merely because performing the contract has become less profitable.

Commercial risk is particularly important in fixed-price agreements because price certainty is often one of the principal reasons the buyer negotiated that structure.

Can the Turkish Supplier Simply Send a New Price List?

Sending a revised price list does not automatically amend an existing contract.

The supplier should identify the contractual or legal provision allegedly allowing the increase. The foreign buyer should avoid conduct that could later be interpreted as acceptance of the revised price.

Review the Price Clause First

The first question is whether the price is genuinely fixed.

Some agreements describe a price as fixed but also contain adjustment mechanisms based on raw-material indices, inflation, exchange rates, freight expenses, taxes or another benchmark.

The entire agreement should therefore be reviewed rather than relying only on the purchase-order price.

Does the Contract Contain a Price Escalation Clause?

A price-escalation clause may allow increases if specified events occur. The clause should be examined carefully to determine the trigger, formula, maximum adjustment, notification procedure and supporting documentation required.

A supplier cannot necessarily rely on a general increase in costs if the contractual adjustment mechanism requires specific conditions.

Currency Clauses Can Change the Analysis

International contracts frequently price goods in euros, US dollars or another foreign currency. Determine whether the parties deliberately allocated exchange-rate risk through the chosen currency.

A supplier claiming currency losses should not automatically be allowed to shift a risk already addressed by the contract.

Increased Raw-Material Prices Do Not Automatically Cancel the Fixed Price

Steel, aluminum, chemicals, plastics, agricultural commodities and other inputs can fluctuate substantially.

Where the supplier knowingly entered a fixed-price commercial contract, ordinary market fluctuations may form part of the commercial risk it assumed.

Exceptional circumstances require a separate legal analysis.

What About Extreme Cost Increases?

Turkish contract law recognizes mechanisms that can become relevant where extraordinary and unforeseeable circumstances fundamentally disturb the contractual balance.

Article 138 of the Turkish Code of Obligations contains the principal framework concerning excessive difficulty of performance. Its application depends on specific statutory conditions and is not triggered merely because the contract became less profitable.

What Is Hardship Under Turkish Law?

Broadly, the issue arises where an extraordinary circumstance that was not foreseen and could not reasonably have been expected when the contract was made occurs for reasons not attributable to the debtor and fundamentally changes the circumstances existing at formation against the debtor to such an extent that requiring performance becomes contrary to good faith.

The statutory requirements must be examined together.

Commercial Difficulty Is Not Necessarily Legal Hardship

A supplier cannot ordinarily establish hardship merely by showing that its profit margin has decreased.

The question is substantially more demanding: whether the contractual balance has been fundamentally disrupted under circumstances satisfying the applicable legal conditions.

Foreseeability Can Be Decisive

If the relevant risk was reasonably foreseeable when the contract was signed, a hardship argument can become considerably more difficult.

This is particularly important in sectors where commodity prices, exchange rates or transportation costs regularly fluctuate.

Contract Date Matters

The circumstances existing when the contract was executed should be documented.

If the market was already experiencing major price volatility when the supplier accepted a fixed price, the foreign buyer may argue that the relevant commercial risk was known or foreseeable.

Risk Allocation in the Contract Matters

A detailed fixed-price clause can itself demonstrate that the parties intentionally allocated price risk.

The stronger and clearer the contractual allocation, the more important it becomes when evaluating a later request for adjustment.

Force Majeure and Hardship Are Different

Foreign buyers should distinguish a force-majeure event from increased performance costs.

Force majeure typically concerns circumstances preventing performance, whereas hardship concerns circumstances making performance excessively burdensome without necessarily making it impossible.

The applicable contract wording remains crucial.

Does Inflation Allow the Supplier to Increase the Price?

Not automatically.

The existence of inflation alone does not mean every fixed-price contract can be unilaterally repriced. The contract date, duration, currency, industry, foreseeability and allocation of inflation risk should all be considered.

What If the Supplier Says Production Will Stop?

The buyer should immediately request a written explanation.

Ask the supplier to identify the contractual basis for suspending production and the exact calculation supporting the requested increase.

This correspondence may become important evidence if the supplier later refuses performance.

Do Not Accept the Increase Informally

Commercial teams sometimes respond to an urgent supplier request with phrases such as “okay,” “we understand,” or “continue production and we will solve the price later.”

Such communications can create disputes about whether the parties agreed to amend the contract.

Material changes should be addressed formally.

Can Silence Be Treated as Acceptance?

The answer depends on the contractual and factual circumstances. A foreign buyer should therefore respond clearly if it rejects a unilateral price increase.

Avoid allowing repeated invoices at increased prices to accumulate without objection.

Review the Contract Amendment Clause

Many international contracts require amendments to be made in writing and signed by authorized representatives.

If such a clause exists, determine whether emails, purchase orders or other communications satisfy the agreed amendment procedure.

Who Has Authority to Accept a New Price?

A procurement employee may negotiate with the supplier without possessing authority to amend the contract.

Foreign companies should control internal communications carefully and identify who can approve commercial amendments.

What If the Buyer Has Already Paid One Increased Invoice?

Payment can complicate the dispute, particularly if made without reservation.

The parties’ communications and circumstances surrounding payment should be examined before concluding that the entire contract was permanently amended.

Supplier’s Cost Evidence Should Be Requested

If the buyer is willing to evaluate the request commercially, require evidence.

Relevant documents may include supplier invoices, freight costs, raw-material indices, energy costs and calculations demonstrating how the alleged increase affects the contracted product.

Check Whether the Supplier Is Seeking Additional Profit

A supplier may attribute an increase to raw-material costs even though the requested adjustment substantially exceeds the actual additional cost.

A cost-based reconciliation can expose such discrepancies.

What If the Contract Contains a Hardship Clause?

Contractual hardship clauses can define circumstances allowing renegotiation and may establish notice requirements, thresholds, negotiation periods or termination rights.

The contractual mechanism should be analyzed before relying solely on general statutory principles.

Renegotiation Does Not Necessarily Mean Acceptance

A foreign buyer can negotiate commercially without necessarily admitting that the supplier has a legal right to an increase.

Correspondence should clearly preserve the buyer’s contractual position.

Can the Supplier Ask a Turkish Court to Adapt the Contract?

Depending on the governing law and circumstances, a supplier may seek judicial adaptation where the statutory requirements for excessive difficulty of performance are satisfied.

Whether adaptation is justified is a case-specific legal question.

Can the Supplier Terminate the Contract?

Termination cannot simply be assumed because the supplier’s costs increased.

The contract’s termination provisions and any applicable statutory remedy should be examined.

What If the Supplier Refuses to Deliver?

If the supplier has no valid contractual or legal justification, refusal to manufacture or deliver may constitute breach.

The buyer should preserve evidence of the delivery schedule, orders, notices and supplier’s refusal.

Send a Formal Notice

Where delivery is commercially important, a formal notice may identify the contractual price, reject the unilateral increase, demand timely performance and reserve the buyer’s rights.

The wording should reflect the governing contract and circumstances.

Can the Buyer Purchase Replacement Goods?

Potentially, depending on the contract and applicable law.

Before arranging a substitute purchase, document the supplier’s breach, urgency, replacement price and reasonable mitigation efforts.

Can the Buyer Claim the Price Difference?

If the supplier breaches and the buyer reasonably purchases substitute goods at a higher price, the additional cost may become part of a damages claim subject to the applicable contractual and legal requirements.

Keep all competing quotations, replacement contracts and payment records.

What About Production Shutdown Losses?

A foreign buyer may rely on the Turkish supplier for components essential to its manufacturing line.

If non-delivery causes production interruption, potential damages can become substantial. Causation, foreseeability, contractual limitations and proof will be critical.

Lost Profit Claims Require Strong Evidence

Claims for lost profits generally require considerably more evidence than simply asserting that sales were lost.

Preserve customer contracts, confirmed orders, production records, historical margins and evidence connecting the supplier’s breach with the claimed loss.

Check Liability Caps

International supply agreements frequently limit damages to a specified amount or exclude indirect, consequential or lost-profit damages.

These provisions should be reviewed before calculating potential claims.

Liquidated Damages May Apply

The contract may provide predetermined consequences for late delivery or non-delivery.

Determine whether such clauses apply and how they interact with other available remedies.

Bank Guarantees and Performance Security Should Be Reviewed

If the supplier provided a performance guarantee, letter of guarantee or other security, determine whether the circumstances permit a call.

Formal requirements and deadlines should be followed precisely.

Ownership of Advance Payments Matters

If the buyer has already made substantial advance payments, assess the contractual provisions concerning refunds, title to partially manufactured goods and security for repayment.

This becomes particularly important if the supplier is experiencing financial difficulties.

Insolvency Risk Should Not Be Ignored

A sudden demand for substantial additional payment can sometimes indicate broader liquidity problems.

Foreign buyers should investigate whether the supplier remains capable of completing production even if a commercial compromise is reached.

Consider an Interim Commercial Agreement

Where the goods are urgently needed, the parties may negotiate a temporary arrangement while preserving their legal positions.

Any temporary payment or adjustment should state clearly whether it is final, refundable, provisional or made under reservation.

Do Not Lose Leverage Through Emergency Payments

A buyer facing imminent production shutdown may decide commercially to pay additional money.

If so, the payment structure and reservation of rights should be documented carefully before funds are transferred.

Review Governing Law

International supply contracts may select Turkish law or another country’s law.

The applicable law can materially affect hardship, adaptation, damages and termination rights.

Review the Dispute Resolution Clause

Determine whether disputes must be resolved by Turkish courts, foreign courts or arbitration.

The supplier’s location alone does not necessarily determine the forum.

Arbitration Clauses Can Be Particularly Important

Many international supply contracts provide for institutional or ad hoc arbitration.

Before commencing proceedings, confirm the seat, rules, language and requirements for interim relief.

Emergency Interim Measures May Be Necessary

If the supplier threatens to sell goods manufactured specifically for the foreign buyer to another customer, dispose of tooling or take another action creating immediate harm, interim legal remedies may need to be considered.

Tooling and Molds Require Separate Analysis

Foreign buyers often own molds, dies, tooling or equipment located at the Turkish supplier’s factory.

A pricing dispute should not automatically allow the supplier to treat buyer-owned equipment as its own property.

Ownership documentation should be preserved.

Intellectual Property Must Also Be Protected

If the supplier possesses drawings, designs or confidential manufacturing information, review confidentiality and intellectual-property provisions when the commercial relationship deteriorates.

Review Exclusivity Obligations

If the supplier refuses delivery while selling the same product to competitors, exclusivity and non-compete provisions may become relevant.

Preserve market evidence where available.

Consider Whether Both Parties Want the Contract to Continue

Not every price dispute should end in litigation.

Where the relationship remains commercially valuable, a structured amendment can potentially address extraordinary cost changes while preserving supply continuity.

Any Amendment Should Be Precise

If a new price is agreed, specify its effective date, affected purchase orders, duration, future adjustment mechanism and whether previous claims are waived.

Avoid vague agreements to “share additional costs.”

Consider a Price Adjustment Formula

For long-term contracts, future disputes can sometimes be reduced through objective formulas linked to identified commodity, energy, freight or inflation benchmarks.

Caps and floors can also be negotiated.

Review Taxes and Regulatory Changes Separately

A new government charge imposed after signing may present a different issue from ordinary increases in a supplier’s commercial costs.

The contract’s tax and change-in-law provisions should be examined separately.

Evidence the Foreign Buyer Should Preserve

The buyer should retain the signed contract, purchase orders, quotations, price negotiations, supplier correspondence, cost-increase demands, delivery schedules, advance-payment records, replacement quotations, customer commitments and internal records showing the commercial consequences of non-delivery.

Immediate Strategy for the Foreign Buyer

When a Turkish supplier demands additional payment under a fixed-price contract, the foreign buyer should first review the price, adjustment, hardship, force-majeure, amendment, termination and dispute-resolution clauses. It should determine whether the supplier has a contractual basis for the increase, document the original risk allocation, request evidence supporting the alleged cost increase, reject unauthorized repricing clearly where appropriate, protect delivery rights, preserve damages evidence and evaluate substitute procurement or formal legal remedies if the supplier refuses performance.

Frequently Asked Questions

Can a Turkish supplier unilaterally increase a fixed contractual price?

Generally, the supplier cannot simply rewrite an agreed fixed price without a contractual or legally recognized basis. The particular contract and circumstances must be examined.

Does increased inflation automatically justify a price increase?

No. Inflation alone does not automatically entitle every supplier to alter a fixed price.

Can increased raw-material costs justify contract adaptation?

Potentially in exceptional circumstances, but ordinary commercial cost increases do not automatically satisfy the requirements for judicial adaptation.

What is Article 138 of the Turkish Code of Obligations?

It provides the principal Turkish-law framework concerning excessive difficulty of performance where extraordinary circumstances fundamentally disrupt the contractual balance and the statutory requirements are satisfied.

Can the supplier stop delivery until the buyer pays more?

The supplier needs a contractual or legal basis for withholding performance. An unjustified refusal may potentially constitute breach.

Should the foreign buyer pay the increase to avoid production disruption?

That is a commercial decision. If an emergency payment is made, the buyer should carefully document whether it is provisional or made under reservation rather than unintentionally accepting a permanent contract amendment.

Can the buyer purchase from another supplier?

Potentially, particularly following an actionable breach, but the contractual framework, notice requirements and mitigation obligations should be reviewed first.

Can the buyer claim the additional replacement cost?

Potentially, subject to establishing breach, causation, damages and applicable contractual limitations.

Can the supplier apply to court for a higher price?

Depending on the governing law and circumstances, judicial adaptation may potentially be requested where the statutory requirements are met. A price increase is not automatic merely because such a claim is filed.

What should the foreign buyer do first?

Do not immediately accept or reject the demand based only on the percentage increase. Review how the fixed-price contract allocated inflation, currency, raw-material and extraordinary-event risks, preserve the supplier’s demand in writing and determine whether the supplier has an actual contractual or statutory basis for changing the agreed price.

Client-Focused Legal Support for Fixed-Price Supply Contract Disputes in Turkey

Fırat Fesih Kaya Law Office assists foreign buyers, international companies and investors in disputes with Turkish suppliers concerning fixed-price contracts, unilateral price increases, hardship claims, delayed or refused deliveries, substitute purchases, contractual damages and international dispute resolution. Lawyer Fırat Fesih Kaya provides legal assistance in reviewing supply agreements, responding to additional-payment demands, preparing formal notices, negotiating contract amendments, protecting foreign buyers against supply interruption and pursuing litigation or arbitration where commercial resolution is not possible.

Phone:
+90 312 434 22 22

Mobile:
+90 532 769 22 22

Email:
info@firatfesihkaya.av.tr

Address:
Mevlana Boulevard No:221, Yıldırım Tower, Office No:148
06520 Balgat, Çankaya, Ankara, Turkey