Indian criminal law | Joint participation

IPC Section 37: Cooperation by Doing One of Several Acts Constituting an Offence

Section 37 of the Indian Penal Code, 1860 explains when a person commits an offence by intentionally cooperating in one of several acts that together constitute the offence. The corresponding rule appears in Section 3(8) of the Bharatiya Nyaya Sanhita, 2023 (BNS).

Legal reference guide | Updated 28 October 2026

1. Statutory text of IPC Section 37

Co-operation by doing one of several acts constituting an offence. When an offence is committed by means of several acts, whoever intentionally co-operates in the commission of that offence by doing any one of those acts, either singly or jointly with any other person, commits that offence.

The provision addresses an offence brought about by multiple contributing acts. A participant need not personally carry out every step, provided the legal requirements of intentional cooperation and participation in an act constituting the offence are satisfied.

2. Statutory illustrations explained

Illustration (a): Poison administered at different times

A and B agree to murder Z by separately administering small doses of poison at different times. Both give the doses under that agreement with the intention of killing Z. Z dies from the combined effect of the doses. Both are guilty of murder because each intentionally cooperated and performed an act causing the death, even though the acts were separate.

Illustration (b): Joint jailors withholding food

A and B are joint jailors who take turns looking after prisoner Z for six hours each. Intending Z's death, they knowingly cooperate by illegally withholding the food supplied for Z during their respective shifts. Z dies of hunger. Both are guilty of murder. This illustration demonstrates that an illegal omission can form part of intentional cooperation.

Illustration (c): Successive jailors without cooperation

Jailor A intentionally withholds food from Z, weakening him but not causing his death. A is dismissed. Successor B, without collusion or cooperation with A, also illegally withholds food, knowing death is likely, and Z dies of starvation. Under the statutory illustration, B is guilty of murder, while A is guilty only of an attempt to commit murder. Their individual liability differs because they did not cooperate with each other.

Why illustration (c) matters: Mere succession of harmful acts is not enough to establish cooperation. The prosecution must establish the necessary intentional connection between the participants; individual mental state and causation remain relevant.

3. Essential requirements of Section 37

  • Several constituent acts: The offence is committed by means of multiple acts or legally relevant omissions.
  • Intentional cooperation: The accused intentionally assists or participates in committing the offence.
  • Participation in at least one constituent act: The person performs one of the acts, alone or jointly with another.
  • Connection with the offence: The act and the requisite mental element must be assessed against the substantive offence charged.

Simply being present at a location, knowing an offence may occur, or having an association with another accused does not automatically satisfy Section 37. Liability depends on the evidence and the statutory requirements.

4. Current law: BNS Section 3(8)

The Bharatiya Nyaya Sanhita, 2023 came into force on 1 July 2024, subject to the relevant commencement and transitional provisions. BNS Section 3(8) corresponds to IPC Section 37 and retains the rule about intentional cooperation through one of several acts constituting an offence, together with the three illustrations.

PointIPCBNS
ProvisionSection 37Section 3(8)
PrincipleIntentional cooperation in one of several acts constituting an offenceCorresponding general explanation
IllustrationsPoisoning; joint jailors; successive jailors without cooperationCorresponding illustrations
NatureRule of participation and liability, not a stand-alone punishmentGeneral explanation, not a stand-alone punishment

IPC Section 34 deals with acts done by several persons in furtherance of a common intention; IPC Section 35 concerns participation where criminal knowledge or intention is required; and IPC Section 36 addresses effects caused partly by an act and partly by an omission.

Also relevant are IPC Section 32, which extends references to acts to illegal omissions where appropriate, and IPC Section 33, which defines an act or omission to include a series of acts or omissions. These provisions are related but address distinct questions.

6. Practical application

Example of cooperation: Two participants deliberately carry out separate stages of a single prohibited operation, with each performing a constituent act needed to complete the offence. Their liability is evaluated by considering intentional cooperation and the elements of the underlying offence.

Example without cooperation: Two persons independently engage in conduct affecting the same victim, without an agreement or intentional cooperation. The mere fact that their conduct concerns the same victim does not, by itself, establish liability under this provision.

These examples are explanatory. Whether the conduct constitutes an offence, an attempt or another form of participation depends on the substantive criminal law and evidence.

7. Frequently asked questions

What does IPC Section 37 mean?

It means a person who intentionally cooperates in an offence by performing any one of the several acts constituting that offence can be liable for the offence, even if other participants perform the remaining acts.

Which BNS section corresponds to IPC Section 37?

Section 3(8) of the BNS, 2023 contains the corresponding general explanation.

Can an illegal omission count as cooperation?

Yes. The statutory illustration involving joint jailors withholding food shows that deliberate illegal omissions may constitute intentional cooperation.

Does mere presence make someone liable under Section 37?

No. The provision requires intentional cooperation by doing a constituent act. Mere presence without the necessary participation is insufficient on its own.

Does Section 37 prescribe a separate punishment?

No. The applicable punishment comes from the substantive offence established on the facts, not from Section 37 alone.

8. Official legal sources

General legal information only. The law applicable to a specific incident may depend on its date, the governing offence provision and transitional rules.