Right of Private Defence Under the Bharatiya Nyaya Sanhita, 2023: Law, Limits, and Practical Application

The instinct of self-preservation is an inherent human reaction to danger. Every legal system acknowledges that while maintaining law and order is the primary duty of the State, the law cannot expect a citizen to surrender their life, bodily integrity, or property to an unlawful aggressor when state protection is not immediately accessible.

With the criminal law reforms coming into force in India through the Bharatiya Nyaya Sanhita, 2023 (BNS)—which replaces the Indian Penal Code, 1860 (IPC)—the provisions governing the right of private defence have been codified under Sections 34 to 44 of the BNS.

Whether navigating complex criminal litigation or simply understanding your basic rights as a resident in Mumbai, Thane, or Mira Road, it is critical to know how the BNS defines the right of private defence, its statutory boundaries, and the high threshold required to justify defensive force.

The Core Principle: Section 34 of the BNS

Section 34 of the BNS lays down the baseline rule:

"Nothing is an offence which is done in the exercise of the right of private defence."

This provision carries forward the long-standing legal principle formerly codified in Section 96 of the IPC. While the right is absolute in its legal consequence—meaning an act successfully proved to be within self-defence is no offence at all—it is not an unrestricted licence to engage in violence.

The right of private defence is strictly preventive and defensive, never punitive, retaliatory, or vengeful. It is available only against unlawful acts and exists solely to ward off imminent, unlawful aggression.

What Can Be Protected? (Section 35)

Under Section 35 of the BNS, every individual has a right, subject to statutory restrictions, to defend:

Their own body, and the body of any other person, against any offence affecting the human body.
Their own property, or the property of any other person (whether movable or immovable), against any act that constitutes theft, robbery, mischief, or criminal trespass, or an attempt to commit any of these offences.

Notice that the right extends to defending any other person. The law does not mandate a familial or contractual relationship between the defender and the victim. If you witness a stranger being subjected to an unlawful, violent assault on a Mumbai local train or street, you are legally entitled to step in and exercise reasonable force in their defence.

Important Restrictions: Section 37 of the BNS

The right of private defence is circumscribed by clear statutory boundaries under Section 37 of the BNS (corresponding to old Section 99 of the IPC). The law does not permit defensive force in the following circumstances:

1. Lawful Acts of Public Servants

There is no right of private defence against an act done, or attempted to be done, by the direction of a public servant acting in good faith under colour of their office, provided that the act does not cause reasonable apprehension of death or grievous hurt. Even if the officer's act is not strictly justifiable by law, self-defence cannot be raised unless there is an imminent fear of severe injury or loss of life.

2. Opportunity to Recourse to Public Authorities

There is no right of private defence in cases where there is sufficient time and opportunity to seek the protection of public authorities (such as calling the local police station or dialling 112). Self-defence is intended to be an immediate shield when state machinery cannot arrive in time.

3. The Proportionality Rule (No Excessive Harm)

Under Section 37(4) of the BNS, the right of private defence in no case extends to the inflicting of more harm than is necessary to inflict for the purpose of defence.

Example: If someone slaps you, you cannot respond by stabbing them. The degree of force deployed must bear a direct, reasonable relation to the threat faced.

When Can Private Defence Justify Causing Death?

Causing the death of an aggressor is the most extreme measure recognized by criminal law. The BNS strictly limits the circumstances where causing death in self-defence is legally permissible.

Defence of the Body (Section 38, BNS)

The right of private defence of the body extends to the voluntary causing of death only if the offence being committed or attempted creates a reasonable apprehension of:

Death;
Grievous hurt;
Rape or an assault with the intention of gratifying unnatural lust;
Kidnapping or abduction;
Wrongful confinement under circumstances which reasonably cause apprehension that the person will be unable to have recourse to public authorities for their release; or
An act of throwing or administering acid, or an attempt to throw or administer acid, which causes a reasonable apprehension of grievous hurt.

Under Section 39, if the offence does not fall within these specific categories, the right of private defence of the body does not extend to causing death, but only to causing any harm other than death.

Defence of Property (Section 41, BNS)

Similarly, causing death to protect property is restricted to grave property offences, specifically:

Robbery;
House-breaking by night;
Mischief by fire or any explosive substance committed on any building, tent, or vessel used as a human dwelling or place for custody of property; or
Theft, mischief, or house-trespass, under such circumstances as may reasonably cause apprehension that death or grievous hurt will be the consequence if private defence is not exercised.

Under Section 42, for all other property offences, the right allows causing non-fatal harm only.

Commencement and Continuance (Sections 40 and 43)

Self-defence begins the moment a reasonable apprehension of danger arises from an attempt or threat to commit the offence, even if the offence has not yet actually been committed.

However, the right continues only as long as that apprehension of danger continues:

Body (Section 40): The moment an attacker drops their weapon, turns around, and begins fleeing, the apprehension of danger ceases. Striking or shooting an aggressor who is in retreat is considered an act of vengeance or retribution, not private defence.
Property (Section 43): The right continues until the offender has effected their retreat with the property, the assistance of public authorities is obtained, or the property has been recovered.

Procedural Reality: Burden of Proof under BSA, 2023

When a criminal case reaches the trial court, the prosecution must prove the guilt of the accused beyond reasonable doubt. However, under the Bharatiya Sakshya Adhiniyam, 2023 (BSA)—the successor to the Indian Evidence Act—the burden of proving the existence of circumstances bringing the case within any of the General Exceptions (including the right of private defence) lies squarely on the accused.

Key considerations during trial:

Standard of Proof: The accused does not have to prove self-defence beyond reasonable doubt; they only need to establish it on a preponderance of probabilities.
Plea in the Record: While it is standard practice to raise the plea of private defence explicitly, the court can also recognize it from the evidence and cross-examinations conducted on the prosecution's witnesses if the surrounding circumstances clearly show legitimate defensive action.
Injuries on the Accused: Unexplained injuries sustained by the accused during the same incident often serve as material evidence to support the claim that an encounter was defensive rather than premeditated.

Frequently Asked Questions (FAQs)

1. Does Indian law have a "Duty to Retreat" before using force?

No. Indian criminal jurisprudence does not impose a duty to retreat like some Western jurisdictions. A person faced with imminent danger is not required to run away like a coward; they are entitled to stand their ground and neutralise the threat, provided the force used remains strictly proportionate to the danger.

2. Can I claim private defence if an aggressor was unarmed?

Generally, causing lethal harm to an unarmed person is difficult to justify unless there is a significant disparity in physical strength, multiple attackers, or an imminent risk of being strangled, thrown from a height, or subjected to grievous hurt. The court looks at the totality of the circumstances to assess whether a reasonable apprehension of death or grievous hurt existed.

3. What happens if I accidentally injure an innocent bystander while defending myself?

Section 44 of the BNS covers this exact scenario. If you are faced with an assault that creates a reasonable apprehension of death, and you are positioned such that you cannot exercise your right of private defence without risk of harm to an innocent person, your right of private defence extends to running that risk. If an innocent person is unintentionally injured, it is not an offence.

4. Can the aggressor who started the fight claim private defence?

Generally, no. A person who initiates an unlawful aggression or provokes a violent confrontation cannot turn around and claim private defence if the other party reacts defensively. The right of private defence cannot be claimed as a shield for self-created danger.

Legal Assistance and Criminal Defence at APS Law

Invoking the right of private defence requires meticulous factual reconstruction, accurate medical-forensic corroboration, and an in-depth understanding of criminal procedure under the BNS, the Bharatiya Nagarik Suraksha Sanhita (BNSS), and the Bharatiya Sakshya Adhiniyam (BSA). A poorly formulated defence can turn a valid act of self-protection into a conviction for culpable homicide or grievous hurt.

At APS Law, our criminal defence team represents individuals and families across Mumbai, Thane, and Mira Road, guiding clients through every phase of criminal inquiries, bail applications, and trial proceedings.

If you or someone you know is facing criminal allegations arising from an incident involving self-defence or defence of property, contact APS Law today to schedule a confidential legal consultation.