Civil Law and UAE Proportional Liability Distribution Systems

1. Introduction

Proportional liability distribution refers to the legal method of determining how responsibility for the same loss should be distributed among several persons who contributed to the damage.

The principle is especially important where:

several defendants contributed to one injury;

different negligent acts combined to produce one loss;

a claimant also contributed to the damage;

an employer and employee are both involved;

several contractors or professionals contributed to a construction defect;

several parties participated in a fraudulent or unlawful scheme;

one defendant settles and seeks contribution from another.

Under the current UAE Civil Transactions Law, Federal Decree-Law No. 25 of 2025, Article 253 expressly addresses multiple responsible persons and contributory conduct of the injured party. It provides that, where multiple persons are responsible, each is liable in proportion to their share, while the court may order equal or joint-and-several liability. It also permits reduction or denial of compensation where the injured party contributed to causing or aggravating the harm. (UAE Legislation)

2. Meaning of Proportional Liability

The basic idea is:

Responsibility should ordinarily correspond to the person's legally relevant contribution to the loss.

For example, suppose a loss of AED 1,000,000 results from three responsible parties:

A contributed 50%;

B contributed 30%;

C contributed 20%.

A proportional allocation could therefore be:

But Article 253 gives the court flexibility to impose equal or joint-and-several liability where appropriate. Therefore, proportionality is an important starting principle, not necessarily the only possible form of judgment.

3. Current UAE Statutory Foundation

Article 253 of the Current Civil Transactions Law

Article 253 provides two particularly important rules:

A. Multiple wrongdoers

Where several persons are responsible for the harm:

each is liable according to their share in the harm,

but the court may order:

equal liability; or

joint and several liability.

B. Contribution by the injured party

The court may:

reduce compensation; or

refuse compensation entirely,

where the injured person's own conduct:

contributed to causing the harm; or

aggravated the harm.

(UAE Legislation)

This creates a two-stage proportionality analysis:

Stage 1: Allocate responsibility among defendants.

Stage 2: Consider whether the claimant's own conduct should reduce the recoverable compensation.

4. Proportional Liability Is Different from Joint and Several Liability

These concepts must not be confused.

Proportional Liability

Each defendant pays according to their legally determined share.

Example:

Defendant A = 40%

Defendant B = 35%

Defendant C = 25%

Each bears their respective portion.

Joint and Several Liability

The claimant may be able to recover the entire recoverable amount from any defendant against whom joint-and-several liability has been imposed, subject to the applicable legal rules.

The defendants may then have rights of contribution between themselves.

Therefore:

Proportional liability concerns allocation of responsibility.

Joint and several liability concerns the claimant's ability to recover the judgment and the allocation of ultimate financial responsibility among defendants.

5. Why Does UAE Law Permit Joint and Several Liability?

There are circumstances in which identifying an exact percentage of responsibility may be difficult.

For example:

two negligent doctors contribute to one injury;

several contractors contribute to a structural failure;

several conspirators cause one financial loss;

several parties independently commit acts that combine into one injury.

If the court cannot reasonably establish precise percentages, Article 253 permits the court to order equal or joint-and-several liability. (UAE Legislation)

This gives the system flexibility rather than requiring an artificial mathematical calculation in every case.

6. Elements Used to Allocate Liability

A court assessing proportional liability may examine:

1. Nature of the wrongful conduct

Was the defendant's conduct:

negligent;

intentional;

fraudulent;

contractual;

regulatory;

professionally defective?

2. Causal contribution

Did the conduct actually contribute to the damage?

3. Degree of fault

Was the defendant's conduct:

minor;

substantial;

grossly negligent;

intentional?

4. Causal significance

A person's act may be a legal cause of damage even if another person's conduct also contributed.

5. Relative responsibility

The court may compare the respective contributions of the defendants.

6. Claimant's own conduct

The claimant's conduct may reduce compensation where it contributed to or aggravated the harm.

7. Causation Is Essential

Proportional liability does not mean that every person connected with an accident becomes liable.

There must first be a legally sufficient connection between:

Conduct → Damage

The UAE courts have repeatedly treated fault, damage and causation as fundamental components of civil liability.

In BAM Higgs & Hill LLC v Affan Innovative Structures LLC, the DIFC Court discussed the principle that breach alone is insufficient; liability requires the relevant elements, including damage and causal connection. The judgment also referred to Dubai Court of Appeal authority emphasizing that fault, damage and causation must coexist. (DIFC Courts)

Therefore:

No causal contribution = no proportional liability for that loss.

8. Claimant's Contributory Conduct

Proportional liability can also operate from the claimant's side.

Suppose:

defendant's negligence contributed 70%;

claimant's own conduct contributed 30%;

total established loss = AED 1,000,000.

The court may reduce compensation to reflect the claimant's contribution.

The current Article 253 expressly permits the court to reduce or entirely deny compensation where the injured party contributed to causing or aggravating the harm. (UAE Legislation)

This is sometimes described as contributory negligence, although the precise legal terminology depends upon the applicable law and cause of action.

9. Difference Between Contributory Negligence and Defendant Apportionment

These are separate calculations.

Defendant Apportionment

A, B and C caused the harm.

Question:

How should liability be distributed among A, B and C?

Claimant Contribution

The claimant also contributed to the damage.

Question:

Should the claimant's own conduct reduce the compensation?

Thus:

Defendant allocation ≠ claimant contribution.

Both can potentially operate in the same case.

10. Professional and Construction Liability

Proportional allocation becomes particularly important in construction disputes.

Imagine:

architect makes a design error;

engineer fails to detect the defect;

contractor improperly executes the work;

owner contributes by approving a defective modification.

A court must determine:

what each party was contractually required to do;

what each party actually did;

which failures caused the defect;

whether the losses were indivisible;

whether one party's conduct superseded another's;

whether responsibility can be apportioned.

This is why expert evidence is often critical in complex UAE construction disputes.

11. Medical Liability

Medical cases can also involve multiple potentially responsible persons:

surgeon;

hospital;

anesthetist;

treating physician;

medical institution;

insurer or other legally relevant party.

A recent example is Dubai Court of Cassation Judgment No. 377 of 2025, concerning a medical-negligence dispute in which the lower court had imposed joint-and-several compensation liability on two appellants. The case illustrates how multiple professional actors can become involved in the same injury and how the courts examine the respective legal responsibility of the participants. (Al Tamimi & Company)

The important point is that:

Multiple defendants do not automatically mean identical fault.

The court must determine the legal basis and causal contribution of each participant.

12. Contribution Between Defendants

Contribution is the mechanism through which one liable party may seek recovery from another liable party.

For example:

claimant suffers AED 1 million loss;

Defendant A pays AED 1 million;

Defendant B was also responsible.

A may seek contribution from B according to the applicable rules.

This is different from the original claimant's compensation claim.

Original claim

Claimant → Defendant

Contribution claim

Defendant who paid → Other responsible defendant

13. Case Law 1 — Corinth Pipeworks SA v Barclays Bank PLC

Case: Corinth Pipeworks S.A. v Barclays Bank PLC & Others [2010] DIFC CFI 024.

This is one of the most useful UAE/DIFC authorities concerning contribution.

The DIFC Court considered Article 14 of the DIFC Law of Obligations, under which a person liable for loss could recover contribution from another person liable for the same loss. The Court also considered contribution following settlement and held that a party settling a claim could pursue contribution against another person who would have been liable for the same loss. (DIFC Courts)

The Court ultimately considered the relative responsibility of the parties and awarded a contribution reflecting the responsibility of the persons who had caused the loss.

Principle

Contribution allows responsibility for the same loss to be redistributed between legally responsible parties.

14. Case Law 2 — Haya Spa LLC v Harper Real Estate / Hasan Real Estate

Case: Haya Spa LLC v Harper Real Estate / Hasan Real Estate [2016] DIFC SCT 150.

The Court applied the DIFC negligence framework requiring:

duty;

breach;

causation;

damage.

Importantly, the applicable DIFC law provided that liability would be reduced to the extent that the claimant's negligent acts or omissions contributed to the loss. (DIFC Courts)

Principle

The claimant's own contribution to the loss can reduce the amount recoverable.

This provides a clear illustration of claimant-side proportionality.

15. Case Law 3 — BAM Higgs & Hill LLC v Affan Innovative Structures LLC

Case: BAM Higgs & Hill LLC v Affan Innovative Structures LLC & Amer Affan [2021] DIFC CFI 106.

The Court emphasized that establishing a breach alone does not establish compensation liability. The claimant must establish the relevant loss and causal connection.

The judgment also referred to Dubai appellate authority stating that civil liability requires the coexistence of:

fault;

damage;

causal connection. (DIFC Courts)

Principle

Apportionment begins only after causation and liability have been established.

A court cannot simply assign a percentage to a party merely because that party was involved in the transaction.

16. Case Law 4 — Dubai Court of Cassation Appeal No. 309 of 2016

A recent 2026 ADGM judgment discussing UAE law referred to Dubai Court of Cassation Civil Appeal No. 309 of 2016 and its interpretation of Article 291 of the former UAE Civil Code.

The Court of Cassation was quoted as explaining that joint liability for compensation requires, among other matters, that each person held responsible committed a fault and that each fault contributed to the occurrence of the damage. (BAILII)

Principle

Joint liability requires legally relevant contribution to the damage; mere association with the circumstances is insufficient.

Current relevance

The older case interpreted Article 291 of the repealed 1985 Civil Code. The current equivalent framework should now be examined primarily through Article 253 of the 2025 Civil Transactions Law.

17. Case Law 5 — Union Properties PJSC & Anor v Trinkler & Partners Ltd & Others

Case: Union Properties PJSC & Anor v Trinkler & Partners Ltd & Others [2026] ADGMCFI 0010.

This is particularly useful because the 2026 judgment directly discussed the former UAE Civil Code's Article 291 and the concept of apportionment.

The Court recorded an argument that UAE law creates a preference for apportionment and that joint-and-several liability should be used where individual apportionment is not possible. It also considered the significance of the responsibility of individual participants in a broader conspiracy/directors' liability dispute. (BAILII)

Principle

The case demonstrates the practical tension between:

individual proportional responsibility

and

joint-and-several responsibility where allocation is difficult or legally justified.

Important qualification

The judgment concerned the former Article 291 framework, so the current Article 253 should be used for present federal-law analysis.

18. Case Law 6 — Eason v Bank Sarasin-Alpen (ME) Limited

Case: Ms Georgina Marie Eason, in her capacity as Official Liquidator of Bank Sarasin-Alpen (ME) Limited, DIFC CFI 005/2016.

The proceedings involved contribution claims arising from earlier investment-mis-selling litigation in which two parties had been held jointly and severally liable for losses.

The case illustrates an important consequence of joint-and-several liability:

A party that has borne liability may have a separate contribution claim against another responsible party.

The Court record specifically identifies contribution claims arising from the earlier joint-and-several liability findings. (DIFC Courts)

Principle

Joint-and-several liability toward the claimant does not necessarily end the inquiry between the defendants; internal contribution can redistribute the ultimate burden.

19. Case Law 7 — Shihab Khalil v Shuaa Capital PSC

Case: Shihab Khalil v Shuaa Capital PSC [2009] DIFC CFI 017.

The Court emphasized that negligence requires both improper conduct and causation of loss. The claimant must establish that the defendant's conduct caused the relevant loss. (DIFC Courts)

Principle

This case is important to proportional liability because:

There can be no meaningful percentage allocation without first establishing causal responsibility.

20. Case Law 8 — Corinth Pipeworks and the 100% Contribution Principle

The later part of Corinth Pipeworks is particularly significant.

The Court considered whether the contribution should be partial or complete and examined the parties' respective responsibility for the loss. It concluded that the defendants responsible for the dishonest scheme should provide a complete contribution in the circumstances before the Court. (DIFC Courts)

Principle

Proportionality does not necessarily mean a small percentage: where one party bears essentially the whole legally relevant responsibility, contribution may approach or reach 100%.

21. How a UAE Court Can Calculate Proportional Responsibility

A simplified analytical model is:

Step 1 — Establish the total loss

Example:

AED 2,000,000

Step 2 — Identify all potentially responsible parties

Contractor

Engineer

Supplier

Step 3 — Establish causation

Determine whether each party's conduct contributed to the loss.

Step 4 — Determine relative responsibility

Suppose:

Contractor = 50%

Engineer = 30%

Supplier = 20%

Step 5 — Apply Article 253

Potential proportional allocation:

Contractor = AED 1,000,000

Engineer = AED 600,000

Supplier = AED 400,000

Step 6 — Examine claimant's contribution

Suppose claimant contributed 10% to the damage.

The court may reduce the compensation accordingly, depending on the circumstances.

22. Factors Relevant to Percentage Allocation

A court should not treat percentages as arbitrary numbers.

Relevant considerations may include:

A. Degree of fault

Who committed the more serious breach?

B. Causal importance

Whose conduct was more significant in producing the loss?

C. Professional responsibility

Did a party have specialized responsibilities?

D. Control

Who had practical control over the risk?

E. Knowledge

Who knew or should reasonably have known about the danger?

F. Opportunity to prevent the loss

Who could have avoided the damage?

G. Contractual allocation

Did the parties expressly allocate particular risks?

H. Claimant conduct

Did the claimant contribute to or aggravate the loss?

23. Proportional Liability in Construction

Consider a building defect caused by:

The court must avoid automatically making all parties equally responsible.

Instead:

Duty + Scope + Breach + Causation + Relative Contribution = Apportionment

24. Proportional Liability in Medical Negligence

Suppose:

Doctor A makes a surgical error;

Doctor B fails to diagnose the resulting complication;

Hospital fails to maintain appropriate procedures.

The court must establish:

the duty of each participant;

breach by each;

medical causation;

actual damage;

whether each breach contributed to the injury.

The fact that all three were involved in the patient's treatment does not automatically establish equal liability.

The 2025 Dubai Court of Cassation medical-negligence litigation illustrates the importance of analyzing the conduct of multiple medical participants and the resulting compensation responsibility. (Al Tamimi & Company)

25. Proportional Liability and Employers

An employer may sometimes face liability arising from an employee's conduct under applicable UAE law.

This creates another potential distribution question:

Employee's wrongful act → Employer's legal responsibility → Internal allocation/contribution

The claimant-facing liability and internal financial responsibility should be kept conceptually separate.

26. Proportional Liability and Fraud

Fraudulent schemes often involve multiple actors.

For example:

Person A creates the fraudulent transaction;

Person B transfers the money;

Person C receives the benefit;

Person D assists the scheme.

The court must determine:

whether each committed a legally actionable wrong;

whether each contributed to the loss;

whether joint liability is appropriate;

whether contribution should subsequently occur between them.

Corinth Pipeworks demonstrates how the responsibility of multiple participants in a dishonest scheme can support contribution and, depending upon the facts, a complete contribution from the principal wrongdoers. (DIFC Courts)

27. Proportional Liability and Settlement

Settlement creates an important practical issue.

Suppose:

A settles with claimant for AED 600,000;

B and C were also responsible.

The question becomes:

Can A recover a contribution from B and C?

Under the DIFC framework considered in Corinth Pipeworks, a party that settles may pursue contribution against another person who would have been liable for the same loss if the factual basis of the claim is established. (DIFC Courts)

This demonstrates why settlement and contribution are interconnected.

28. Contribution vs Indemnity

These should also be distinguished.

Contribution

One responsible person seeks a proportionate amount from another responsible person.

Indemnity

One party seeks to shift the relevant loss entirely to another party because the latter has the primary responsibility or because of a contractual indemnity.

Therefore:

Contribution = sharing

Indemnity = shifting

29. Double Recovery

The claimant should not ordinarily receive compensation exceeding the legally recoverable loss merely because several defendants are responsible.

For example:

Loss = AED 1 million.

The claimant should not obtain:

AED 1 million from A;

plus another AED 1 million from B;

plus another AED 1 million from C,

as three separate recoveries for the same loss.

The DIFC Law of Obligations expressly addresses this through its prohibition on double recovery, while allowing contribution and joint-and-several mechanisms to operate between responsible parties. (DIFC Courts)

30. Evidence Required for Apportionment

A party seeking a particular allocation should normally support it with evidence such as:

contracts;

expert reports;

technical records;

medical records;

correspondence;

inspection reports;

project documents;

financial records;

witness evidence;

regulatory findings;

photographs/videos;

electronic records.

For example, in a construction case, an expert may help establish:

Design defect → 30%

Execution defect → 50%

Material defect → 20%

The court, however, remains responsible for determining the legal consequences.

31. Proportional Liability and Expert Evidence

Expert evidence can be particularly valuable when the court must distinguish between several causal factors.

Examples:

Construction

Design vs supervision vs execution.

Medicine

Initial treatment vs later treatment vs underlying condition.

Financial services

Advice vs investor decision vs market movement.

Product liability

Manufacturing defect vs misuse vs modification.

The expert may assist with technical causation, but the ultimate legal allocation remains a judicial question.

32. Proportional Liability and Force Majeure

A force majeure or external cause may break or reduce causal responsibility where legally applicable.

The current Civil Transactions Law recognizes circumstances involving external causes beyond the responsible person's control within its harmful-act framework.

Thus:

If an independent external event caused the relevant loss, the defendant's proportional share may be reduced or eliminated.

This reinforces the principle that allocation must be based upon legally relevant causation, not merely factual involvement.

33. Current UAE Legal Framework — Revision Table

The primary current statutory provision is Article 253 of the 2025 Civil Transactions Law. (UAE Legislation)

34. Important Distinction: Old Article 291 and New Article 253

This is especially important for 2026 examinations and legal research.

Former Civil Code

Article 291 of Federal Law No. 5 of 1985 stated, in substance, that where several persons were responsible for a harmful act, each was liable in proportion to their share, while the judge could impose equal or joint-and-several liability.

Current Civil Transactions Law

The same basic concept is now contained in Article 253 of Federal Decree-Law No. 25 of 2025. (UAE Legislation)

Therefore, older UAE cases discussing Article 291 remain useful for understanding the development of the principle, but current legal analysis should cite Article 253.

35. Mainland UAE vs DIFC/ADGM Authorities

The distinction is important.

Mainland UAE

The current federal Civil Transactions Law, together with applicable emirate and special legislation, governs the relevant dispute.

DIFC

DIFC has its own legal framework, including the DIFC Law of Obligations and Law of Damages and Remedies.

ADGM

ADGM has its own legal framework, while UAE-law questions may arise where applicable.

Therefore, cases such as Corinth Pipeworks and Haya Spa are useful for comparative UAE analysis but should not automatically be treated as binding interpretations of Article 253 of the current federal Civil Transactions Law.

36. Exam-Oriented Case Summary

37. Quick Revision Formula

Basic formula

Multiple Defendants → Establish Fault → Establish Damage → Establish Causation → Determine Relative Responsibility → Apportion Liability → Consider Claimant's Contribution → Apply Appropriate Remedy

Proportionality formula

Total Loss × Legally Determined Responsibility = Individual Share

Claimant-contribution formula

Recoverable Loss − Legally Relevant Claimant Contribution = Potential Compensation

Contribution formula

Amount Paid by One Liable Party → Determine Other Party's Responsibility → Contribution/Indemnity

38. Conclusion

The UAE approach to proportional liability seeks to balance individual responsibility, causal contribution, fairness to the injured party and practical enforceability.

The central rule under the current Civil Transactions Law is Article 253: multiple responsible persons are generally liable according to their respective shares, but the court may impose equal or joint-and-several liability. At the same time, the injured person's own contribution to the damage can justify reducing or even denying compensation. (UAE Legislation)

The most important conceptual sequence is:

Fault → Damage → Causation → Relative Responsibility → Apportionment

And where several defendants are involved:

Proportional Liability = Distribution of Ultimate Responsibility

while

Joint and Several Liability = Mechanism for Recovery Against Multiple Responsible Parties

The major practical lesson is that percentage allocation is not automatic. The court first determines whether each party is legally responsible and causally connected to the loss; only then does it determine whether proportional, equal, joint-and-several, contribution, or indemnity mechanisms should apply.