Jurisprudence, Interpretation and General Laws · Law of Torts

Essentials of Tort: Wrongful Act and Legal Damage

Updated 11 October 2026 · Fact-checked

A tort is a civil wrong for which the law gives damages. It needs a wrongful act or omission by the defendant, a breach of a legal duty, and legal damage, meaning violation of a legal right. Injuria sine damno is a legal wrong without loss. Damnum sine injuria is loss without a legal wrong.

Understand Essentials of Tort: Wrongful Act and Legal Damage

A tort is a civil wrong, other than a mere breach of contract or breach of trust, for which the usual remedy is a claim for unliquidated damages. The duty broken is fixed by law and owed towards persons generally, not by agreement between two parties.

To succeed in a tort claim, the plaintiff must show two essentials. First, the defendant did a wrongful act or omission. Second, that act or omission caused legal damage to the plaintiff.

A wrongful act is an act or omission that breaches a legal duty. An omission counts only where the law imposes a duty to act. A moral duty alone is not enough. Failing to help a drowning stranger is not a tort, but a failure by someone who owed a legal duty of care can be.

Legal damage is not the same as loss of money or comfort. It means the violation of a legal right of the plaintiff. If a right is violated, the law presumes damage. If no legal right is violated, the plaintiff has no claim, however big the loss.

This gives two maxims. Injuria sine damno: injury (violation of a legal right) without actual damage. It is actionable. Damnum sine injuria: damage (loss) without violation of a legal right. It is not actionable. The maxim ubi jus ibi remedium (where there is a right, there is a remedy) is the base of this idea. Every legal right deserves a remedy.

Key rules to remember

Essentials of a tort: Tort = wrongful act or omission + legal damage; Both must be present. The wrongful act must breach a duty imposed by law.
Injuria sine damno: Violation of legal right + no actual loss = actionable; Applies mainly to torts actionable per se, such as trespass to person or land, and libel. Plaintiff may get nominal damages.
Damnum sine injuria: Actual loss + no violation of legal right = not actionable; Loss caused by lawful competition or the lawful use of one's own property is a typical illustration.
Ubi jus ibi remedium: Where there is a right, there is a remedy; Explains why violation of a legal right is actionable even without proof of loss.
Actionable per se vs. actionable only on proof of special damage: Per se: no proof of loss needed. Otherwise: proof of actual damage needed; Trespass, assault and libel are per se. Negligence and slander (generally) need proof of damage.

How to solve Essentials of Tort: Wrongful Act and Legal Damage questions

Use this method for both theory questions and problem questions on the essentials of tort.

1Identify what is asked: a definition of tort, an explanation of the essentials, the two maxims, or a fact-based problem.
2State the rule: a tort needs a wrongful act or omission and legal damage.
3Test the first element. Ask whether the defendant breached a legal duty by act or by an omission where the law required action.
4Test the second element. Ask whether a legal right of the plaintiff was violated. Do not stop at loss.
5Name the maxim that fits: injuria sine damno if the right is violated without loss, damnum sine injuria if there is loss without violation of a right.
6Support with a well-known case: Ashby v White for injuria sine damno, and Gloucester Grammar School case or Mogul Steamship case for damnum sine injuria.
7Close with a clear conclusion on whether the plaintiff can claim damages.

Quickest way: Right-or-loss test

When to use it: Use it for short problem questions where facts show a loss and you must decide quickly if there is a tort.

Write one line: tort needs wrongful act plus legal damage.
Ask: was a legal right violated? Yes or no.
If yes, write injuria sine damno, add the case, and conclude that the claim lies.
If no, write damnum sine injuria, add the case, and conclude that no claim lies.
Add ubi jus ibi remedium as the closing principle.

Common mistakes in Essentials of Tort: Wrongful Act and Legal Damage

Treating legal damage as any financial loss.
In everyday speech, damage means loss or harm.
Fix: Write that legal damage means violation of a legal right. Loss alone does not make a tort.
Swapping the meanings of injuria sine damno and damnum sine injuria.
The Latin words look alike and the order is easy to confuse.
Fix: Remember that injuria means legal wrong and damnum means loss. The word that comes first is what exists. Sine means without.
Saying every omission is a tort.
Students stress the words act or omission in the definition.
Fix: State that an omission is wrongful only where the law imposes a duty to act. A moral duty is not enough.
Saying injuria sine damno is actionable in all torts.
Students overgeneralise the maxim.
Fix: Say that it applies to torts actionable per se. In torts like negligence, actual damage is a necessary element.
Writing cases without the facts or the holding.
Students memorise only case names.
Fix: Write one line of facts and one line of result. For example, in Ashby v White the plaintiff was wrongly refused his vote and was held entitled to damages although his candidate won.
Confusing tort with breach of contract.
Both give a civil remedy.
Fix: Point out that a tort breaches a duty fixed by law towards people in general, and damages are unliquidated. A contract breach breaches a duty created by the parties' agreement.

Worked examples

Example 1

Explain the maxims injuria sine damno and damnum sine injuria with suitable cases. (Subjective, about 8 marks)

Show the solution

Provision: a tort needs a wrongful act and legal damage. Legal damage means violation of a legal right, not just loss. The maxim ubi jus ibi remedium supports this.
Injuria sine damno: this means violation of a legal right without actual loss. It is actionable. In Ashby v White, the defendant, a returning officer, wrongly refused the plaintiff's vote. The candidate the plaintiff supported still won. The plaintiff was held entitled to damages because his right to vote was violated.
Damnum sine injuria: this means actual loss without violation of a legal right. It is not actionable. In Gloucester Grammar School case, a schoolmaster set up a rival school and the old school lost pupils. The old school's claim failed because lawful competition violates no legal right.
Another illustration is the Mogul Steamship Co. v McGregor Gow case. Traders combined to lower freight rates to drive out a rival. The rival lost business but had no claim because no legal right was violated.
Distinction: in the first, a right is violated but there is no loss. In the second, there is loss but no right violated.
Conclusion: legal injury, not the amount of loss, decides whether a tort claim lies.

Answer: Injuria sine damno is violation of a legal right without loss and is actionable (Ashby v White). Damnum sine injuria is loss without violation of a legal right and is not actionable (Gloucester Grammar School case, Mogul Steamship case).

Example 2

Rohit runs a tea stall on a road. Meena opens a new tea stall next to his and sells at lower prices. Rohit's sales fall by half. Rohit sues Meena for damages. Advise Rohit.

Show the solution

Provision: a tort needs a wrongful act or omission and legal damage, which is violation of a legal right.
Facts: Rohit has suffered financial loss. The question is whether Meena violated any legal right of his.
Analysis: Rohit has no legal right to be free from lawful competition. Meena used her own business freedom and did not use unlawful means such as fraud, defamation or passing off.
Maxim: this is damnum sine injuria, loss without violation of a legal right. The law supports this in the Gloucester Grammar School case.
Conclusion: Rohit has no claim in tort. The position would change if Meena had used unlawful means, such as falsely claiming that her tea was his.

Answer: Rohit cannot succeed. His loss is damnum sine injuria, since lawful competition violates no legal right.

Exam tips

Begin every answer with the two essentials: wrongful act or omission, and legal damage. Examiners look for this base.
Learn one case for each maxim well. Ashby v White and Gloucester Grammar School case are enough for most answers, and Mogul Steamship is a good second case for damnum sine injuria.
In problem questions, name the maxim in the analysis and state a firm conclusion in the last line.
Mention that injuria sine damno applies to torts actionable per se. This shows you know the limit of the rule.
If the question says explain ubi jus ibi remedium, link it to legal damage and show that every violated right deserves a remedy.

Practice questions from Law of Torts

Essentials of Tort: Wrongful Act and Legal Damage: frequently asked questions

What is the difference between injuria sine damno and damnum sine injuria?

Injuria sine damno is violation of a legal right without actual loss, and it is actionable. Damnum sine injuria is actual loss without violation of a legal right, and it is not actionable. The first gives a claim, the second does not.

What does ubi jus ibi remedium mean?

It means where there is a right, there is a remedy. If the law recognises your right and someone violates it, the law gives you a remedy, usually damages. It is the principle behind the rule that violation of a legal right is actionable.

What is legal damage in the law of torts?

Legal damage is the violation of a legal right of the plaintiff. It is different from loss of money, comfort or business. A person can suffer loss without legal damage, and then there is no tort.

Is an omission always a wrongful act in tort?

No. An omission is wrongful only where the law imposes a duty to act. A merely moral duty does not make an omission a tort.