CIVIL LAW AND UAE REASONABLENESS STANDARD IN CIVIL LAW

1. Introduction

The reasonableness standard is an important judicial concept in UAE civil law. It helps courts determine whether a person's conduct, contractual performance, exercise of a right, or claimed remedy is legally acceptable in the circumstances.

Reasonableness does not mean that a court is free to rewrite every contract according to what it personally considers fair. Rather, the court uses objective legal standards such as:

good faith;

law;

custom;

nature of the transaction;

proportionality;

legitimate contractual expectations;

prevention of abuse of rights;

surrounding circumstances; and

the interests of the parties.

The concept is particularly important where statutory provisions use broad standards such as good faith, justice, fairness, reasonable limits, custom and abuse of rights.

Under the former Civil Transactions Law, Article 246 required contractual performance according to the contract and consistently with good faith, while also extending contractual obligations to matters arising from law, custom and the nature of the transaction. The new Civil Transactions Law, Federal Decree-Law No. 25 of 2025, retains the good-faith principle in Article 221 and also expands regulation of pre-contractual conduct. The new law entered into force on 1 June 2026.

2. Meaning of Reasonableness in UAE Civil Law

Reasonableness means assessing conduct according to an objective legal standard appropriate to the particular transaction and circumstances.

For example:

A contractor has a contractual right to suspend work after non-payment. If the employer misses a payment by a very small administrative delay and immediately corrects the mistake, the court may examine the contractual terms, notice provisions, commercial circumstances and good faith before determining the legal consequences.

Reasonableness therefore asks:

Was the exercise of the right consistent with the law, good faith, the purpose of the transaction and the surrounding circumstances?

It is not simply:

"What seems fair to one party?"

3. Reasonableness and Good Faith

The strongest connection is between reasonableness and good faith.

Under the former Article 246:

A contract had to be performed according to its contents.

Performance had to comply with good faith.

Obligations could extend beyond express words.

Law, custom and the nature of the transaction could create additional obligations.

The current Civil Transactions Law preserves this basic principle through Article 221.

Thus:

Contract → Good Faith → Reasonable Conduct → Proper Performance

Good faith may require parties to:

cooperate where cooperation is necessary;

provide information required by the transaction;

avoid deliberately frustrating contractual performance;

avoid deceptive conduct;

respect legitimate contractual interests;

exercise contractual rights consistently with their purpose; and

avoid using technical contractual provisions as instruments of abuse.

4. Reasonableness Is Not the Same as Subjective Fairness

This distinction is extremely important.

Subjective fairness

"What I personally think is fair."

Legal reasonableness

"What an objective assessment of the contract, law, custom, circumstances and conduct requires."

A court therefore does not ordinarily disregard a valid contractual term merely because one party subsequently considers it commercially inconvenient.

The principle of contractual binding force remains important.

Reasonableness operates within the legal framework, rather than replacing it.

5. Sources of the Reasonableness Standard

The UAE reasonableness standard can arise from several sources.

A. Statutory law

The Civil Transactions Law contains provisions involving:

good faith;

justice;

custom;

exceptional circumstances;

abuse of rights;

proportionality;

contractual interpretation;

damages; and

judicial adjustment.

B. Contractual purpose

The court may examine why the contract was made.

C. Custom

Commercial and professional custom may influence what reasonable performance requires.

D. Nature of transaction

The conduct expected in:

construction;

banking;

insurance;

real estate;

agency;

professional services;

may differ according to the transaction.

E. Good faith

Good faith is a major objective standard against which contractual conduct may be examined.

F. Abuse of rights

A technically existing legal right may nevertheless be exercised unlawfully when the circumstances fall within the statutory doctrine of abuse of rights.

6. Reasonableness and Contract Interpretation

Reasonableness becomes important where contractual language is:

ambiguous;

incomplete;

contradictory;

technically drafted;

commercially unusual; or

capable of more than one interpretation.

The court seeks to understand the contractual relationship rather than mechanically isolating one sentence.

Relevant factors may include:

wording;

contractual structure;

parties' intention;

commercial purpose;

conduct after formation;

surrounding circumstances;

custom; and

good faith.

This does not permit the court simply to substitute a new bargain for the parties' agreement.

7. Reasonableness and Contractual Performance

The reasonableness standard is particularly significant during performance.

Suppose a supplier must deliver goods by a specified date.

The supplier:

knows the buyer's production line depends upon delivery;

discovers a foreseeable logistical problem;

deliberately provides no warning;

waits until the deadline has passed; and

then claims that the contract contains no express duty to warn.

A court may examine whether the supplier's conduct was compatible with good faith and with obligations arising from the nature of the transaction.

The former Article 246 expressly connected contractual obligations with law, custom and the nature of the transaction. The current law continues the fundamental approach.

8. Reasonableness and Abuse of Rights

The doctrine of abuse of rights is closely connected with reasonableness.

A party may possess a legal right but exercise it in an unlawful manner.

The former Civil Transactions Law Article 106 identified circumstances in which exercise of a right could become unlawful, including intentional infringement of another's rights, disproportion between the interest sought and harm caused, and exceeding customary bounds.

Therefore:

Existence of right ≠ unlimited freedom to exercise that right.

The court can examine:

purpose;

consequences;

proportionality;

custom;

surrounding circumstances; and

harm to others.

This is one of the clearest manifestations of objective reasonableness in UAE civil law.

9. Reasonableness in Exceptional Circumstances

Reasonableness is particularly important when circumstances change dramatically.

Under the former Article 249, where exceptional public circumstances that could not reasonably have been foreseen made contractual performance excessively burdensome and threatened grave loss, the judge could reduce the burden to reasonable limits after balancing the interests of the parties.

This illustrates an important principle:

Contractual certainty is important, but civil law can contain mechanisms for exceptional adjustment where maintaining the original burden would become legally oppressive.

The current Civil Transactions Law should be consulted for the applicable 2026 provisions and transitional rules in an actual dispute.

10. Reasonableness and Adhesion Contracts

Standard-form contracts can create a significant reasonableness issue.

The former Article 248 permitted judicial intervention where an adhesion contract contained unfair provisions, allowing the judge to vary or exempt the adhering party from such provisions according to justice.

This demonstrates that UAE civil law historically recognised a distinction between:

freely negotiated contractual terms; and

standard terms imposed on a weaker contracting party.

Reasonableness therefore interacts with:

bargaining power;

unfair contractual terms;

consumer protection;

standard-form agreements; and

contractual justice.

11. Reasonableness in Damages

Reasonableness also affects the assessment of compensation.

The objective of civil compensation is generally to repair legally recognised loss rather than impose a purely punitive sanction.

Courts may therefore examine:

actual damage;

causation;

foreseeability where legally relevant;

evidence of loss;

mitigation-related conduct;

contractual allocation of risk;

agreed compensation; and

proportionality where the law permits judicial adjustment.

A claimant cannot ordinarily obtain compensation merely by asserting that an amount appears reasonable.

Damage must be legally established.

12. Reasonableness in Contractual Penalties

Contractual penalties are another important example.

Parties may agree in advance upon compensation for breach.

However, UAE civil law has traditionally permitted judicial control over agreed compensation in appropriate circumstances.

The court may therefore examine whether the agreed amount corresponds to the actual loss and the circumstances of the breach, subject to the applicable statutory framework.

The underlying principle is:

Contractual freedom + judicial control = balanced civil-law enforcement.

13. Reasonableness in Construction Contracts

Construction disputes frequently involve reasonableness questions.

Examples include:

extension of time;

delay;

site conditions;

variations;

suspension;

payment certification;

defects;

access to site;

design responsibility;

notice requirements;

mitigation of loss.

For example, an employer may technically possess a contractual right to impose delay damages, but the court may examine:

whether the contractor actually caused the delay;

whether concurrent delay existed;

whether the employer contributed to the delay;

whether notices were contractually required;

whether the claimed amount is legally recoverable.

Reasonableness therefore operates alongside the specific contract and statutory rules.

14. Reasonableness in Real Estate Transactions

In real-estate disputes, reasonableness may arise in:

developer obligations;

handover;

defects;

delay;

service obligations;

termination;

forfeiture;

brokerage;

lease assignment;

maintenance;

common property;

mortgage enforcement.

A party should not assume that the mere existence of a contractual clause automatically resolves every issue.

The court may examine the contractual language together with mandatory law, good faith, registration rules, custom and the nature of the transaction.

15. Reasonableness in Banking and Finance

Banking transactions frequently involve sophisticated contracts.

Examples include:

acceleration clauses;

security enforcement;

guarantees;

default interest;

conditions precedent;

material adverse change provisions;

representations;

information obligations.

Reasonableness does not mean that courts disregard sophisticated financial contracts.

Instead, the question may be whether the bank's conduct falls within the contractual and statutory framework and whether the exercise of the relevant right is consistent with good faith.

16. Reasonableness and Notice Requirements

Notice provisions are another important area.

A contract may require:

written notice;

a specified period;

opportunity to cure;

particular delivery methods.

A party that completely ignores these requirements may face legal consequences.

Conversely, a court may have to examine the circumstances where:

the other party actually received the information;

the contractual purpose of the notice was achieved;

the failure was merely technical;

the contract makes the requirement mandatory; or

mandatory law provides otherwise.

The answer depends on the applicable law and contractual wording.

17. Reasonableness and Electronic Contracts

Modern transactions increasingly involve:

electronic signatures;

automated communications;

online platforms;

smart contracts;

algorithmic decisions;

digital notices.

The same fundamental civil-law principles continue to matter.

An automated system does not necessarily eliminate:

contractual intention;

good faith;

causation;

proof;

statutory restrictions; or

judicial control.

A smart contract may automatically execute a contractual consequence, but the underlying legal relationship can still become subject to judicial examination.

18. Reasonableness and Pre-Contractual Conduct Under the 2026 Law

This is a particularly important modern development.

The new Civil Transactions Law does not confine good-faith considerations to contractual performance.

The 2025 legislation introduced provisions dealing with:

negotiations;

good-faith conduct during negotiations;

termination of negotiations;

disclosure of material information; and

liability for certain bad-faith pre-contractual conduct.

Accordingly, the modern UAE framework recognises that civil reasonableness can become relevant before the contract is finally concluded, not merely after breach.

This represents an important development from the traditional focus of former Article 246 on contractual performance.

19. Important Case Laws

Case 1 — Dubai Court of Cassation, Judgment No. 288 of 2025

This decision is important for the relationship between good faith and contractual rights.

The judicial approach recognised that contractual performance must comply with good faith and that contractual obligations can extend beyond literal wording to matters arising from law, custom and the nature of the transaction.

Principle

A party cannot necessarily rely upon the literal existence of a contractual right while ignoring the broader requirements governing the contractual relationship.

Importance

It demonstrates the connection between:

contract → good faith → reasonable conduct.

It is particularly relevant to commercial contracts and the exercise of contractual rights.

Case 2 — Abu Dhabi Court of Cassation, Judgment No. 179 of 2024

This decision is relevant to contractual interpretation.

The judicial approach recognises that where contractual provisions require interpretation, the court considers the relevant contractual language and applicable interpretive principles rather than mechanically isolating words from their context.

Principle

Reasonableness operates through contextual interpretation rather than arbitrary judicial rewriting.

Importance

The case is useful for explaining how courts connect contractual wording with:

intention;

context;

contractual structure; and

applicable civil-law principles.

It was also referred to in later UAE/DIFC judicial discussion concerning interpretation and good faith.

Case 3 — Dubai Court of Cassation, Judgment No. 503 of 2025

This decision concerns the binding force of contracts and contractual performance.

The principle associated with the decision is that a valid contract generally binds its parties and cannot simply be unilaterally revoked or altered except where the law or agreement permits such intervention.

Principle

Reasonableness does not destroy pacta sunt servanda.

Instead:

Binding contract + good faith + statutory exceptions = proper civil-law analysis.

Importance

This prevents the reasonableness standard from becoming an unrestricted power for courts to rewrite commercial bargains.

Case 4 — Dubai Court of Cassation, Case concerning lease assignment and landlord consent

UAE Cassation jurisprudence has applied the former Article 246 principle to contractual obligations that were not necessarily stated in express words.

In the lease-assignment dispute, the court accepted that the tenant's obligations could include obtaining the landlord's consent before transferring the tenancy where that requirement arose from the contractual relationship and applicable good-faith principles.

Principle

A contract may contain implied or ancillary obligations arising from:

law;

custom;

nature of the transaction; and

good faith.

Importance

This is a strong example of reasonableness operating beyond the literal wording of a contract.

Case 5 — DAS Real Estate v First Abu Dhabi Bank, DIFC CFI 002/2016

This is a DIFC Court decision and must not be treated as binding mainland UAE precedent.

The case considered Article 246 of the former UAE Civil Code in the context of a financing relationship and allegations of lack of good faith.

The court examined whether the relevant conduct actually amounted to a breach of the good-faith requirement.

Principle

A general allegation of unfairness or bad faith is insufficient by itself. The claimant must establish the relevant circumstances and legal basis for the complaint.

Importance

It demonstrates an important limitation:

Reasonableness is evidence-based, not merely rhetorical.

Case 6 — Access Group DWC LLC & Proex Partners Ltd v BLS International FZE, DIFC CFI 091/2023

This is another DIFC authority, not a mainland UAE precedent.

The court discussed the relationship between:

contractual interpretation;

Article 246;

good faith;

law;

custom;

nature of the transaction; and

abuse of rights.

The discussion described good faith as requiring parties to perform obligations honestly and consistently with the contractual relationship and to avoid conduct that unfairly disadvantages the counterparty.

Principle

Reasonableness can operate as part of the broader good-faith assessment.

Importance

The case is useful for comparative understanding of how UAE civil-law principles are discussed in the DIFC courts.

20. Case-Law Principle Table

21. Reasonableness vs Good Faith

Although closely related, the concepts are not identical.

Therefore:

Good faith is one of the principal sources through which reasonableness operates.

22. Reasonableness vs Equity

Reasonableness should also be distinguished from unrestricted equity.

Reasonableness

Uses objective legal standards.

Equity

May involve broader considerations of justice where the legal system permits such considerations.

A UAE court cannot simply disregard mandatory legislation because another outcome appears subjectively fair.

Thus:

Reasonableness is legally controlled discretion.

23. Reasonableness and Judicial Discretion

Judicial discretion is important in UAE civil law, but it has boundaries.

A court must generally consider:

applicable legislation;

contractual terms;

evidence;

relevant custom;

nature of transaction;

good faith;

causation;

legally recognised damage; and

mandatory public-policy rules.

Therefore, the court's task is not to decide:

"What would I have agreed to?"

It is closer to:

"What does the applicable legal framework require when these facts, this contract and these circumstances are objectively considered?"

24. Reasonableness and Proportionality

Proportionality is a major component of reasonableness.

Examples include:

Example 1 — Security enforcement

A creditor may have security rights, but the legal consequences of enforcement must comply with applicable statutory and procedural rules.

Example 2 — Contractual penalty

The agreed amount may be examined according to the statutory rules governing agreed compensation.

Example 3 — Abuse of rights

A party may have a legitimate interest, but the exercise of that right may become problematic where the harm to another is disproportionate or otherwise falls within the statutory abuse-of-rights rules.

25. Reasonableness and Mitigation of Loss

A claimant should not deliberately increase its loss and then automatically expect the other party to bear every resulting amount.

For example:

A supplier wrongfully refuses delivery. The buyer could obtain replacement goods immediately at reasonable additional cost but deliberately waits several months while the loss dramatically increases.

The court may examine:

whether replacement was realistically available;

whether the additional loss was caused by the breach;

whether the claimant acted reasonably;

contractual allocation of risk; and

applicable statutory principles.

Reasonableness therefore interacts with causation and damages.

26. Reasonableness in Professional Liability

Professionals such as:

engineers;

architects;

consultants;

lawyers;

accountants;

medical professionals;

may be judged against standards appropriate to their professional role.

The relevant question may be:

What conduct was reasonably expected from a professional in the same circumstances, subject to the governing statutory and contractual rules?

Expert evidence may be important for determining technical standards, but the ultimate legal assessment remains for the court.

27. Reasonableness in Tort Law

The reasonableness concept is not restricted to contracts.

Civil liability may require examination of:

wrongful conduct;

damage;

causation;

foreseeability;

professional standards;

dangerous activities;

property interference; and

conduct toward others.

The reasonableness inquiry helps courts distinguish legally actionable conduct from ordinary events or unavoidable consequences.

28. Reasonableness in Consumer Transactions

Consumer relationships may involve:

standard-form contracts;

exclusion clauses;

automatic renewals;

digital subscriptions;

warranties;

defective goods;

misleading representations.

The consumer-protection framework may impose mandatory obligations that cannot simply be removed through contractual wording.

Reasonableness therefore operates alongside mandatory consumer legislation rather than replacing it.

29. Reasonableness in Digital and Smart Contracts

Digital contracting creates new questions:

Was consent valid?

Was the electronic notice actually delivered?

Was the automated decision based upon correct data?

Did an algorithm produce an unexpected contractual consequence?

Was the party given the information required by law?

Did automated execution cause disproportionate loss?

The fact that an automated mechanism operates according to code does not necessarily mean the resulting legal consequence is immune from civil-law review.

The legal system can distinguish:

technical execution

from

legal validity and enforceability.

30. Limits of the Reasonableness Standard

The reasonableness standard has important limitations.

1. It cannot normally destroy clear mandatory legislation.

2. It does not automatically invalidate a bad bargain.

3. It does not automatically permit modification of every contract.

4. It cannot replace proof of damage.

5. It does not eliminate contractual certainty.

6. It cannot turn every commercial disagreement into bad faith.

7. It must operate within the jurisdiction's procedural and substantive rules.

8. DIFC and ADGM authorities must be distinguished from mainland UAE jurisprudence.

31. Current-Law Position After 1 June 2026

For current UAE civil-law analysis, an important transition must always be remembered.

Federal Decree-Law No. 25 of 2025 introduced the new Civil Transactions Law and came into force on 1 June 2026, replacing Federal Law No. 5 of 1985.

The new framework retains the good-faith principle in Article 221, while also introducing a more developed statutory framework for pre-contractual negotiations and disclosure.

Therefore, a 2026 legal analysis should follow this sequence:

Current statutory provision → transitional rules → relevant current jurisprudence → historical UAE case law → factual application.

Older cases should not simply be quoted with their 1985 article numbers as though those provisions remain numbered identically today.

32. Practical Test for Reasonableness

A useful examination and litigation test is:

R-E-A-S-O-N Test

R — Rule
What statutory or contractual rule applies?

E — Express terms
What does the contract expressly provide?

A — Actual circumstances
What actually happened?

S — Standard of conduct
What does good faith, custom or professional practice require?

O — Objective assessment
Was the conduct objectively reasonable in the circumstances?

N — Necessary consequence
What legal consequence follows—performance, damages, termination, adjustment, restitution or another remedy?

33. Example

Facts

A developer promises to hand over a commercial unit.

The contract gives the developer a contractual extension for specified circumstances.

The developer experiences a delay caused partly by its own administrative failure and partly by an external event.

Legal analysis

The court may examine:

exact contractual wording;

whether the external event qualifies under the contract;

whether the developer complied with notice requirements;

whether the developer contributed to the delay;

whether it acted in good faith;

whether the claimed extension is legally justified;

actual loss;

causation; and

applicable mandatory law.

Reasonableness therefore does not answer the dispute by itself.

Instead, it structures the legal evaluation of the parties' conduct.

34. Importance of Reasonableness in UAE Civil Law

The reasonableness standard performs several functions:

A. Prevents mechanical application of contractual language

B. Supports good-faith performance

C. Controls abuse of rights

D. Helps interpret ambiguous provisions

E. Supports proportionality

F. Assists in exceptional-circumstance cases

G. Protects legitimate contractual expectations

H. Helps assess damages

I. Supports modern digital transactions

J. Balances contractual autonomy and civil justice

35. Short Exam Answer

The reasonableness standard in UAE civil law is an objective method of assessing whether conduct, contractual performance or exercise of a civil right is legally appropriate in the circumstances. It operates particularly through good faith, contractual interpretation, custom, the nature of the transaction, proportionality and the prohibition of abuse of rights. Under the former Civil Transactions Law, Article 246 required contractual performance in accordance with good faith, while the current Civil Transactions Law retains the principle in Article 221 and expands regulation of pre-contractual conduct. UAE courts use these principles to balance contractual certainty with fairness without generally rewriting valid agreements. Reasonableness is therefore best understood as legally controlled objective evaluation rather than unrestricted judicial discretion.

36. Quick Revision Points

Remember:

Reasonableness = Objective legal assessment

Good faith = Major foundation

Custom = Relevant standard

Nature of transaction = Context

Proportionality = Control against excessive consequences

Abuse of rights = Limits exercise of legal rights

Contractual certainty = Still protected

Judicial discretion = Legally controlled

Current law = Federal Decree-Law No. 25 of 2025

Effective date = 1 June 2026

Former Article 246 → current good-faith principle reflected in Article 221

Old cases = Historical guidance; check current statutory provisions

37. Conclusion

The reasonableness standard in UAE civil law is not an independent licence for courts to replace contractual bargains with their own preferences. It is an objective legal method for assessing conduct within the framework of legislation, contractual terms, good faith, custom, the nature of the transaction, proportionality and the prohibition of abuse of rights.

Its greatest significance appears where the literal application of a contractual right creates a dispute concerning good faith, implied obligations, excessive consequences, exceptional circumstances, damages or abuse of rights.

The 2026 Civil Transactions Law strengthens the contemporary importance of this approach by retaining good faith in Article 221 and by extending statutory regulation to aspects of pre-contractual conduct. Consequently, the modern UAE civil-law approach can be expressed as:

Contractual autonomy + good faith + objective reasonableness + proportionality + mandatory law = balanced civil-law application.

For examination purposes, the central proposition is:

Reasonableness in UAE civil law does not replace the contract; it helps determine how the contract and civil rights must lawfully operate within the circumstances of the transaction.