Developer Changes the Payment Plan After Contract Signing in Turkey: Can a Foreign Buyer Refuse? (2026 Updated Guide)

Can a property developer change an agreed payment plan after signing? Learn the rights of foreign property buyers when developers demand higher installments, earlier payments, additional fees or new payment conditions.

A foreign buyer purchasing property in Turkey may sign a reservation agreement, preliminary sale agreement or another property purchase contract containing a detailed payment schedule, only to be told later that the developer has changed the installments, accelerated the remaining balance or introduced additional payments. A developer generally cannot treat a signed contract as though its financial terms were merely provisional. Whether the buyer must accept the proposed change depends on the contract, the nature of the transaction, any valid amendment mechanism and the legal basis asserted by the developer. A foreign buyer confronted with a unilateral payment change should therefore avoid making an immediate additional payment or signing a revised document before the contractual consequences have been examined.

Can a Developer Change the Payment Plan After the Contract Is Signed?

A payment schedule incorporated into a valid contract normally forms part of the parties’ agreed obligations. A developer cannot simply assume that it has an unrestricted right to rewrite those obligations after signing.

The first question is therefore whether the contract actually authorizes the proposed adjustment and, if so, under what circumstances.

The Signed Contract Should Be Reviewed First

The buyer should obtain the complete executed version of the agreement, including annexes, payment tables, specifications and subsequent amendments.

Particular attention should be given to the purchase price, installment dates, currency, payment method, acceleration provisions, default clauses, additional charges and amendment provisions.

Oral Statements Should Be Compared With the Written Contract

Foreign buyers are sometimes told during the sales process that installments will remain fixed or that the balance will not become due until construction reaches a particular stage.

If a dispute later arises, preserve emails, messages, brochures, payment schedules and other evidence concerning what was represented during negotiations.

Can the Developer Demand Earlier Payment?

Suppose the contract provides for twelve installments, but the developer later demands the entire remaining balance within thirty days.

The buyer should first identify the contractual clause allegedly allowing acceleration. A developer’s cash-flow needs alone do not automatically rewrite the agreed payment dates.

Can Monthly Installments Be Increased?

If the contract fixes the amount of each installment, a later increase requires a legal and contractual basis.

The developer should be asked to explain in writing why the amount has changed and identify the contractual provision relied upon.

What If Construction Costs Have Increased?

Developers may argue that labor, construction materials, financing or other project expenses have increased.

Rising project costs do not automatically mean that a buyer must accept a unilateral increase in a previously agreed fixed purchase price or installment schedule. The contractual allocation of those risks must be examined.

What If the Contract Contains a Price Adjustment Clause?

The clause should be analyzed carefully.

Determine what event activates the adjustment, how the new amount is calculated, whether there is an objective formula, whether notice is required and whether the developer’s interpretation actually falls within the clause.

The mere existence of an adjustment clause does not necessarily authorize every requested increase.

Foreign Currency Clauses Require Separate Review

Some property transactions involve amounts calculated or discussed with reference to foreign currencies.

The enforceability and operation of currency-related provisions should be examined under the legal framework applicable to the specific transaction and the parties rather than assumed from the wording of a sales brochure.

Additional Fees Can Also Create Disputes

A developer may leave the installment schedule unchanged but demand new amounts described as administrative expenses, connection charges, maintenance advances, title expenses or project costs.

The buyer should determine whether those payments were disclosed and contractually allocated from the beginning.

A New Invoice Does Not Automatically Amend the Contract

The developer’s accounting department may issue an invoice or payment notice showing a higher amount.

That document should be compared with the underlying agreement. A unilateral accounting document does not by itself establish that the parties mutually amended their contractual obligations.

Do Not Sign a Revised Payment Plan Without Reviewing It

This is particularly important.

A developer may present a new schedule as a routine administrative document. However, signing it may later be relied upon as evidence that the buyer accepted the amendment.

The revised document should therefore be reviewed before signature.

WhatsApp Acceptance Can Become Evidence

Property negotiations frequently take place through messaging applications.

Messages such as “okay, I accept the new plan” may later become relevant in determining whether an amendment was agreed. Buyers should avoid casually approving significant contractual changes through informal communications.

Paying the Increased Installment Can Also Affect the Dispute

Payment after receiving a revised schedule may become part of the evidentiary record concerning acceptance.

A buyer who disputes the increase should obtain legal advice before deciding whether to pay, pay under reservation or pursue another contractual response.

Can the Buyer Simply Stop Paying?

Stopping all payments without examining the contract can be dangerous.

Even if the developer’s new demand is disputed, the buyer may still have obligations under the original payment schedule. Failure to perform undisputed obligations could allow the developer to allege buyer default.

The strategy should distinguish the original contractual obligation from the disputed additional demand.

Developer Default Should Also Be Investigated

A demand for accelerated payment can sometimes occur while the developer itself is behind schedule.

Check whether construction milestones have been achieved, whether delivery is delayed and whether other developer obligations remain outstanding.

Payment May Be Linked to Construction Milestones

Some contracts make installments dependent on completion of specified construction stages.

If so, determine objectively whether the relevant milestone has occurred before accepting a demand for payment.

Construction Progress Should Be Documented

Preserve dated photographs, project updates, correspondence and other evidence concerning construction status.

For substantial disputes, independent technical evaluation may also become relevant.

What If the Developer Threatens Contract Cancellation?

A developer may state that failure to accept the revised payment schedule will result in immediate cancellation.

The buyer should request the contractual and legal basis for that threat in writing.

Termination consequences can be significant, so the buyer should not respond impulsively.

Can the Developer Keep All Money Already Paid?

This should not be assumed.

The legal consequences of termination depend on the contract, reason for termination, payments already made and applicable rules. A clause allowing complete forfeiture should be analyzed rather than accepted automatically.

Penalty Clauses Should Be Reviewed

Contracts may contain penalties for late payment, withdrawal or termination.

The developer may attempt to calculate those penalties using the newly demanded amount rather than the original schedule. The calculation and contractual basis should be checked carefully.

What If the Developer Refuses to Continue Unless the Buyer Accepts?

The buyer should document the refusal and preserve all communications.

A written record may become important if the developer later claims that the buyer voluntarily abandoned the transaction.

Request the Change in Writing

If the new payment plan was communicated by telephone or during a meeting, ask for the proposal in writing.

The document should specify the new amount, due dates, reason for the change and contractual basis.

Preserve the Original Advertisement and Sales Materials

Marketing materials can be useful in understanding how the property, price and payment structure were presented.

Preserve brochures, screenshots, emails and advertisements before they disappear.

Foreign Buyers Should Preserve Translation Evidence

Where the contract was negotiated through an interpreter or translated documents were provided, retain those materials.

A dispute can arise where the buyer was shown one payment schedule in another language but signed documents containing materially different terms.

Power of Attorney Transactions Require Additional Review

If an agent or representative signed documents for the buyer, determine exactly what authority was granted.

A representative’s authority to purchase property does not necessarily resolve whether that person was authorized to accept every subsequent amendment.

What If the Buyer Purchased Through a Real Estate Agent?

The agent’s communications should also be preserved.

If the agent promised fixed installments or provided a particular payment schedule, those communications may become relevant to disputes involving representations made during the transaction.

Review Whether the Property Has Been Sold to Someone Else

If relations with the developer deteriorate, the buyer should consider whether additional protective measures are needed concerning the property itself.

The appropriate strategy depends heavily on the legal form of the transaction and the buyer’s existing rights.

Title Deed Status Is Critical

A buyer who already holds registered title may be in a materially different position from a buyer relying only on a preliminary contractual arrangement.

The land registry position should therefore be checked when the dispute becomes serious.

Mortgages and Encumbrances Should Be Investigated

Foreign buyers should also determine whether mortgages, attachments or other restrictions affect the property.

A payment-plan dispute may sometimes reveal broader financial problems within the development.

Developer Financial Problems Can Be a Warning Sign

A sudden request for accelerated payments from multiple buyers may indicate project financing difficulties.

This does not itself prove insolvency, but the buyer should assess whether construction and delivery remain realistically achievable.

Should the Buyer Negotiate?

Negotiation may be commercially sensible where the buyer still wants the property.

However, any settlement should clearly state the revised price, payment dates, delivery obligations, consequences of delay and whether previous claims are waived.

Do Not Accept a Vague Amendment

If the parties agree to modify the schedule, the amendment should be precise.

A document stating merely that “payments may be revised according to project conditions” can create another dispute later.

What If the Buyer Has Already Paid the Increased Amount?

Payment does not necessarily prevent every later claim, but the circumstances matter.

The buyer should preserve the demand, payment records, communications and any objection made when payment was requested.

Bank Records Are Important Evidence

Keep bank transfers, receipts, payment confirmations and account statements.

Each payment should be capable of being connected with the relevant contractual installment.

Cash Payments Create Additional Evidentiary Problems

Where payments were made in cash, obtain and preserve signed receipts.

Disputes become significantly more difficult where the developer later denies receiving part of the purchase price.

Can the Buyer Demand Performance Under the Original Contract?

Depending on the transaction and contractual circumstances, the buyer may seek to insist that the developer comply with the original agreement rather than the unilateral revised schedule.

The appropriate claim depends on the legal structure of the property transaction.

Can the Buyer Terminate the Contract?

Potentially, depending on the seriousness of the developer’s conduct and the contractual and statutory framework.

Termination should be evaluated carefully because it can affect repayment claims, penalties and rights concerning the property.

Can the Buyer Recover Payments?

Where the transaction is validly terminated or another restitution basis exists, repayment may become an important part of the dispute.

The buyer should calculate principal payments, additional charges and other documented amounts separately.

Interest and Additional Losses May Become Relevant

Where money is wrongfully retained or repayment is delayed, interest and potentially other provable losses may need to be evaluated under the applicable legal framework.

Such claims should be supported by evidence rather than estimated broadly.

Interim Protection May Be Necessary

If there is a genuine risk that the property will be transferred, encumbered or otherwise placed beyond effective recovery, available interim judicial measures should be assessed urgently.

The requirements depend on the specific transaction and evidence.

Foreign Buyers Should Act Before the Dispute Escalates

The best time to review the situation is usually when the first unilateral change is demanded.

Waiting until the developer declares termination, resells the unit or substantial additional payments have been made can make the dispute more complicated.

2026 Practical Strategy for Foreign Property Buyers

A foreign buyer who receives a revised payment schedule should immediately compare it with the signed agreement, identify the alleged contractual basis for the change, preserve communications, continue distinguishing undisputed obligations from disputed demands, investigate construction progress and title status, avoid signing new documents without review and send a properly structured written response where necessary.

Where the developer threatens termination, resale or forfeiture of payments, judicial protection should be considered before irreversible steps occur.

Frequently Asked Questions

Can a developer unilaterally change an agreed payment plan?

Not merely because the developer prefers different commercial terms. The contract, applicable legal rules and any valid amendment mechanism must be examined.

Can the developer demand all remaining installments immediately?

Only where there is a sufficient contractual and legal basis for acceleration. The buyer should request that basis in writing.

Do increased construction costs automatically allow a higher purchase price?

No automatic conclusion should be drawn. The contract’s price and adjustment provisions must be reviewed.

Should the buyer sign a new payment schedule?

Not before understanding whether the document changes the purchase price, installment dates, termination rights or other obligations.

Can the buyer refuse the increase but continue paying the original installments?

This may be an important strategy in some disputes, but the exact approach should be determined from the contract and circumstances to avoid an allegation of buyer default.

What if the developer threatens to cancel the sale?

The buyer should request the legal and contractual basis for cancellation and obtain advice before accepting the developer’s position.

Can WhatsApp messages be relevant?

Yes. Communications concerning the payment schedule, negotiations, acceptance or objections may become important evidence.

What if the buyer already accepted one increased payment?

The legal effect depends on the circumstances, communications and contractual structure. Preserve all evidence concerning why and how the payment was made.

Can a foreign buyer seek an injunction?

Potentially, where the legal requirements for interim protection are satisfied and there is a risk requiring urgent judicial intervention.

What should the foreign buyer do first?

Do not treat the developer’s new payment schedule as automatically binding. Obtain the signed contract, compare every changed amount and due date, request the legal basis for the amendment in writing and avoid signing or accepting a revised agreement before its consequences are understood.

Legal Support for Foreign Property Buyers

A unilateral payment-plan change can quickly develop into a dispute involving additional payment demands, contract termination, forfeiture of deposits, construction delays, title problems, resale risks and recovery of money already paid. Fırat Fesih Kaya Law Office assists foreign property buyers in reviewing developer contracts, challenging disputed payment demands, negotiating contractual solutions, seeking repayment and pursuing judicial protection where necessary.

Lawyer Fırat Fesih Kaya provides legal assistance to foreign investors and property buyers facing disputes with developers concerning payment schedules, delivery obligations, title transfers, contractual penalties and termination.

Phone: +90 312 434 22 22

WhatsApp: +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