Construction Contracts and FIDIC Disputes for Foreign Contractors in Türkiye
If you are a foreign contractor on a project in Türkiye (Turkey), your contract is probably a FIDIC form — the Red, Yellow or Silver Book — and your first real question is how that internationally drafted document actually behaves once a dispute lands in a Turkish legal setting. The short answer: in a construction contract dispute in Turkey, FIDIC governs the mechanics of your claim, but Turkish law sits underneath it and cannot be contracted away. Even where you and the employer have chosen a foreign governing law, the mandatory rules of Turkish law, the enforcement regime for any award, and, if the seat is in Türkiye, Turkish arbitration law all shape what you can recover and how. This guide explains where FIDIC and Turkish law meet, how the FIDIC dispute ladder — engineer's determination, the Dispute Board, then arbitration — plays out for a foreign contractor, and the practical steps that protect your claims from the day you sign.
Do FIDIC contracts apply in Türkiye?
Yes. FIDIC forms are the default contract language on large Turkish infrastructure, energy and international construction projects, and Turkish law fully accepts them. A FIDIC contract is not a special legal regime — it is a private agreement between the parties, and Turkish law treats it like any other negotiated construction contract. What matters is that a FIDIC form is a starting template written for an international audience; it does not switch off the Turkish rules that govern how a contract is performed and enforced in Türkiye.
The three forms you will meet most often each allocate risk differently:
| FIDIC form | Colour | Who designs | Typical use |
|---|---|---|---|
| Construction contract | Red Book | Employer designs; contractor builds to that design | Employer-designed building and civil works |
| Plant & design-build | Yellow Book | Contractor designs and builds | Plant, process and design-build projects |
| EPC / turnkey | Silver Book | Contractor takes most design and risk | Turnkey projects where the employer wants price and time certainty |
The practical takeaway: reading only the FIDIC conditions is not enough. Your risk is set by the FIDIC form plus the negotiated Particular Conditions plus the mandatory Turkish rules underneath — and it is usually that last layer that surprises a contractor.
Where are you in the project?
Which law governs your FIDIC contract, and can you choose?
In a cross-border project you can generally choose the governing law of your contract, and FIDIC leaves a blank for exactly that. But choice of law has limits, and understanding them is the single most important thing for a foreign contractor to get right.
Turkish private international law recognises party autonomy: parties to an international contract may pick the applicable law. Where the project is built in Türkiye, however, several things pull Turkish law back in regardless of what you chose:
- Mandatory rules and public policy. Certain protective and public-order rules of Turkish law apply even against a foreign governing law. A choice of English law, for example, will not override a Turkish mandatory provision or a rule of Turkish public policy (kamu düzeni).
- Rights over land and registration. Anything touching Turkish immovable property, its registration and related permits is governed by Turkish law.
- Enforcement in Türkiye. If you ultimately need a Turkish court or bailiff to enforce an award or judgment against Turkish assets, that enforcement runs through Turkish procedure and its public-policy filter.
How does the FIDIC dispute mechanism work?
FIDIC's strength is a staged dispute process built into the contract, so disagreements are resolved as the project runs rather than years later. For a foreign contractor, the discipline of this ladder is what preserves a claim — miss a rung and you can lose money you were genuinely owed.
The staged process in the standard forms runs roughly like this:
- Notice of claim. The contractor must give notice of a claim (for extra time or money) within a short, defined period after becoming aware of the event. In the standard forms this window is famously tight — 28 days is the classic figure — and it operates as a condition: notify late and the claim can be time-barred as a matter of contract.
- Engineer's determination. The Engineer (or Employer's Representative) reviews the claim and makes a determination, aiming for a fair assessment of any extension of time or additional payment.
- Dispute Board. If a party is dissatisfied, the dispute goes to a Dispute Adjudication Board or, in the newer forms, a standing Dispute Avoidance/Adjudication Board (DAAB), which issues a decision that is binding unless and until revised.
- Amicable settlement. A short period is set aside to try to settle before arbitration.
- Arbitration. If the dispute still is not resolved, it goes to arbitration under the agreed rules and seat.
| Stage | Who decides | Effect |
|---|---|---|
| Claim notice | Contractor gives notice | Preserves the claim; missing the deadline can bar it |
| Engineer's determination | The Engineer | First formal assessment of time / money |
| Dispute Board (DAB / DAAB) | Independent adjudicator(s) | Binding decision, subject to challenge in arbitration |
| Amicable settlement | The parties | Window to settle before arbitration |
| Arbitration | Arbitral tribunal | Final, enforceable award |
Litigation or arbitration — where do FIDIC disputes end up?
FIDIC contracts almost always point to arbitration as the final forum. Arbitration keeps the dispute out of local courts, allows a neutral tribunal and language, and — crucially — produces an award that is enforceable across borders. The alternative, litigating in the Turkish courts, is entirely possible but is conducted in Turkish and under Turkish civil procedure.
Two routes are common. The dispute can be seated abroad (for example, under ICC Rules with a foreign seat), or it can be seated in Türkiye — increasingly at the Istanbul Arbitration Centre (ISTAC), which offers institutional arbitration on home ground. Where the seat is in Türkiye, the arbitration is governed by Turkish arbitration law.
| Arbitration | Turkish court litigation | |
|---|---|---|
| Language | Can be English (or as agreed) | Turkish |
| Decision-maker | Tribunal chosen by / for the parties | Turkish judge |
| Privacy | Usually confidential | Public procedure |
| Cross-border enforcement | New York Convention award, widely enforceable | Judgment needs recognition abroad |
| Typical FIDIC choice | Yes — the default final forum | Only if the parties chose the courts |
Getting the dispute clause right at signing is far cheaper than fixing it later. Our arbitration and dispute resolution team drafts and reviews the arbitration and governing-law clauses in FIDIC Particular Conditions before they become a problem.
We chose English law, so Turkish law does not really affect us.
Turkish private international law (Act No. 5718, MOHUK) does recognise your choice, but it is one layer of protection, not a shield. Turkish mandatory rules and public policy still apply, anything touching Turkish land and its registration stays under Turkish law, and enforcement against Turkish assets runs through Turkish procedure.
The FIDIC time limits are administrative; a strong claim will still be heard.
The notice window operates as a condition of the claim, and notifying late can bar it as a matter of contract. Whether a strict time-bar is fully enforced can be affected by mandatory Turkish rules such as good faith, but that is not a rescue plan. Treat the deadlines as hard.
A Dispute Board decision is only a recommendation until an arbitrator confirms it.
The Dispute Board (DAB, or the standing DAAB in the newer forms) issues a decision that is binding unless and until it is revised. Skipping or ignoring the Dispute Board rung of the ladder can cost you the claim.
A New York Convention award is enforced in Turkiye more or less automatically.
You must apply to a Turkish court for recognition and enforcement, and the court checks the award against the limited Convention grounds: a defective arbitration agreement, a party not properly notified or unable to present its case, a tribunal exceeding its mandate, or conflict with Turkish public policy. Build the contract and the case with Turkish enforceability in mind from the start.
Will a foreign arbitral award be enforced in Türkiye?
For most foreign contractors, the whole point of arbitration is a globally enforceable award. Türkiye is a party to the 1958 New York Convention on the Recognition and Enforcement of Foreign Arbitral Awards, so an award made in another Convention state can, in principle, be recognised and enforced against Turkish assets.
Enforcement is not automatic, though — you apply to a Turkish court for recognition and enforcement (tanımaTanımaRecognition of a foreign judgment in TürkiyeThe court decision that makes a foreign judgment legally effective in Türkiye as proof — without, by itself, making it enforceable.Glossary → ve tenfizTenfizEnforcement of a foreign judgment in TürkiyeThe Turkish court decision that makes a foreign judgment enforceable in Türkiye — the step that lets you actually collect.Glossary →), and the court reviews the award against the limited grounds allowed under the Convention. It does not re-hear the merits. The classic points where enforcement is resisted are:
- a defective or invalid arbitration agreement;
- a party not being properly notified or unable to present its case;
- the tribunal exceeding its mandate;
- the award conflicting with Turkish public policy (kamu düzeni).
One mirror-image risk is worth noting: if the employer holds performance or advance-payment guarantees from a Turkish bank, disputes over calling those guarantees are fought in Türkiye under Turkish law, whatever the main contract says.
The Turkish-law issues that catch foreign contractors out
Beyond the dispute machinery, a handful of substantive Turkish rules regularly change the outcome of FIDIC claims. None of them appear in the printed FIDIC text, which is exactly why they surprise people.
- Delay penalties (cezai şart). FIDIC delay damages interact with Turkish penalty-clause rules. A Turkish court or tribunal applying Turkish law can reduce a penalty it finds excessive — but note that a party which is a merchant (tacir) under the Turkish Commercial Code No. 6102 generally cannot ask for that reduction, save in narrow cases. Which way this cuts depends on who is paying. See our guide to penalty clauses and liquidated damages in Turkish contracts.
- Force majeure and hardship. FIDIC has its own force-majeure (exceptional events) machinery, but Turkish law also recognises hardship / excessive difficulty of performance, allowing an adjustment or, in extreme cases, termination where unforeseeable events upset the contract's balance. The two regimes overlap imperfectly — read them together, as we explain in force majeure and hardship in Turkish contracts.
- Defect liability and time bars. The contractor's liability for defects, and the periods within which the employer must act, are governed by the works-contract rules of Code of Obligations No. 6098 — a tiered framework that runs from delivery and can be longer for buildings.
- Good faith. Turkish law reads and applies contracts through an overriding duty of good faith, which can temper the mechanical operation of a harsh clause.
How a lawyer helps on a Turkish FIDIC project
A FIDIC project in Türkiye rarely fails on the engineering. It fails on decisions taken too late — a governing-law clause that ignores Turkish mandatory rules, a claim notice served after the deadline, a guarantee wording nobody stress-tested, an award that cannot survive the public-policy filter. A Türkiye-qualified lawyer, working alongside your project and technical teams, adds value at three points.
At contract stage, the Particular Conditions are where the real negotiation happens: the governing law and seat, the dispute-board and arbitration clauses, the delay-penalty and guarantee provisions, and how the FIDIC text is reconciled with mandatory Turkish rules. Our commercial contract and construction and zoning teams review and negotiate these before signature.
During the project, disciplined claim management — notices, Engineer determinations, Dispute Board references and records — is what keeps a claim alive. At the dispute stage, running the arbitration and, if needed, the recognition and enforcement of the award in Türkiye is work our arbitration and dispute resolution practice handles end to end. Bringing that advice in at signing, not at the first big claim, is what protects a foreign contractor's margin.
A construction contract in Turkiye is at its core a works contract (eser sozlesmesi) under this law, which supplies the underlying rules on defects and their tiered time limits running from delivery.
Permits the parties to choose the applicable law and forum for an international contract, subject to Turkish mandatory rules and public policy.
Governs international arbitration where the seat is in Turkiye.
Governs domestic arbitration and Turkish court litigation, which is conducted in Turkish if the parties chose the courts instead of arbitration.
Source of the rule that a party which is a merchant (tacir) generally cannot ask for reduction of an agreed penalty, save in narrow cases, which changes how FIDIC delay damages behave under Turkish law.
What to have ready before you take advice
On a FIDIC project the answer usually sits in the contract documents and the paper trail. Assemble these before the first conversation.
Frequently asked questions
Are FIDIC contracts valid and used in Türkiye?
Yes. FIDIC forms (the Red, Yellow and Silver Books) are the standard on large Turkish infrastructure, energy and international construction projects, and Turkish law treats a FIDIC contract like any other negotiated works contract (eser sözleşmesi) under the Code of Obligations No. 6098. The FIDIC conditions apply alongside the parties' Particular Conditions and the mandatory rules of Turkish law — reading the printed FIDIC text alone does not tell you your full risk position.
Can we choose English or another foreign law for a FIDIC contract performed in Türkiye?
Generally yes — Turkish private international law (Act No. 5718, MÖHUKMÖHUKTurkish Private International Law Act No. 5718The Turkish statute that decides which country's law applies to a cross-border matter, and how foreign judgments are recognised and enforced here.Glossary →) recognises the parties' right to choose the governing law of an international contract. But that choice does not switch off Turkish mandatory rules or public policy (kamu düzeni), and matters touching Turkish immovable property and local registration remain governed by Turkish law. On a project built in Türkiye, treat the governing-law clause as one layer of protection, not a way to escape the local rules that matter most.
How does the FIDIC dispute process work?
The standard forms build a staged ladder: the contractor gives a claim notice within a short defined window (28 days is the classic figure), the Engineer makes a determination, an unresolved dispute goes to a Dispute Adjudication Board or standing Dispute Avoidance/Adjudication Board (DAAB) whose decision is binding unless revised, a short amicable-settlement period follows, and finally the dispute goes to arbitration. Missing the notice or Dispute Board steps can cost you the claim, so serve notices in writing and on time and keep contemporaneous records.
Do FIDIC disputes go to arbitration or the Turkish courts?
FIDIC contracts almost always name arbitration as the final forum. It can be seated abroad (for example ICC arbitration) or in Türkiye — increasingly at the Istanbul Arbitration Centre (ISTAC). Where the seat is in Türkiye, international arbitration is governed by the International Arbitration Law No. 4686. Litigating in the Turkish courts is possible if the parties chose the courts, but it is conducted in Turkish under the Code of Civil Procedure No. 6100. Arbitration is usually preferred by foreign contractors for its neutrality, confidentiality and cross-border enforceability.
Will a foreign arbitral award be enforced against assets in Türkiye?
In principle yes. Türkiye is a party to the 1958 New York Convention, so an award from another Convention state can be recognised and enforced (tanıma ve tenfiz) by a Turkish court. Enforcement is not automatic: the court checks the award against the limited Convention grounds — a defective arbitration agreement, lack of proper notice, the tribunal exceeding its mandate, or conflict with Turkish public policy — without re-hearing the merits. The public-policy exception is the one most often argued, which is why building the contract and the case with Turkish enforceability in mind matters.
What Turkish-law issues most often surprise foreign contractors on FIDIC projects?
Four recur: delay penalties (a Turkish court can reduce an excessive penalty, but a merchant/tacir under Commercial Code No. 6102 generally cannot ask for that reduction); the overlap between FIDIC's exceptional-events regime and Turkish hardship/force-majeure rules; defect liability and its tiered time limits under Code of Obligations No. 6098; and the overriding duty of good faith, which can temper a harsh clause. None appear in the printed FIDIC text, and most lost claims turn on missing documentation rather than bad law.
