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Indian Penal Code & Bharatiya Nyaya Sanhita - Quick Reference

Study notes covering the Indian Penal Code 1860 and its successor the Bharatiya Nyaya Sanhita 2023. Covers general principles, exceptions, offences against person and property, defamation, abetment, attempt, right of private defence, and key differences between IPC and BNS.

Last updated: 28 February 2026
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General Principles of Criminal Law

Disclaimer: These notes are original educational summaries and not a substitute for prescribed textbooks or the bare text of statutes.

Foundation of Criminal Law in India

The Indian Penal Code (IPC), enacted in 1860, has been the primary substantive criminal law of India for over 160 years. Drafted under the chairmanship of Lord Macaulay, it codified criminal offences and punishments applicable throughout India. In 2023, the Parliament enacted the Bharatiya Nyaya Sanhita (BNS) to replace the IPC, which came into effect on 1 July 2024. While the basic principles remain largely the same, the BNS reorganises provisions, adds new offences, and modifies some penalties.

Fundamental Principles

1. Actus Reus and Mens Rea: Criminal liability generally requires both a guilty act (actus reus) and a guilty mind (mens rea). The act alone, without a criminal intention or knowledge, does not typically constitute an offence. However, certain offences are of "strict liability" where mens rea is not required (e.g., statutory offences under special laws).

2. Presumption of Innocence: Every accused person is presumed innocent until proven guilty beyond reasonable doubt. The burden of proof rests on the prosecution. The standard of proof in criminal cases is "beyond reasonable doubt," which is higher than the "preponderance of probability" standard in civil cases.

3. Principle of Legality (Nullum crimen sine lege): No act constitutes a crime unless it is defined and penalised by law at the time it was committed. This principle is reflected in Article 20(1) of the Constitution, which prohibits retrospective criminal legislation.

4. Double Jeopardy (Autrefois Acquit / Autrefois Convict): Article 20(2) of the Constitution and Section 300 of CrPC (Section 358 of BNSS) protect a person from being prosecuted and punished for the same offence more than once.

5. Right Against Self-Incrimination: Article 20(3) of the Constitution protects an accused person from being compelled to be a witness against himself.

Key Definitions (IPC Sections 6-52A / BNS Sections 2-22)

  • "Act" and "Omission": The word "act" denotes as well a series of acts as a single act. An omission is also an "act" when there is a legal duty to act.
  • "Person": Includes any company, association, or body of persons, whether incorporated or not.
  • "Wrongful gain" and "Wrongful loss": Gain or loss by unlawful means of property to which the person gaining or losing is not legally entitled.
  • "Dishonestly": Doing anything with the intention of causing wrongful gain to one person or wrongful loss to another.
  • "Fraudulently": Doing anything with the intent to defraud.
  • "Voluntarily": A person is said to cause an effect voluntarily when he causes it by means whereby he intended to cause it, or by means which, at the time of employing them, he knew or had reason to believe to be likely to cause it.
  • "Good faith": Nothing is said to be done or believed in good faith which is done or believed without due care and attention.

Classification of Offences

Offences under the IPC/BNS can be classified as:

  • Cognizable and Non-cognizable: Cognizable offences allow police to arrest without warrant and investigate without Magistrate's permission.
  • Bailable and Non-bailable: In bailable offences, bail is a matter of right; in non-bailable offences, bail is at the discretion of the court.
  • Compoundable and Non-compoundable: Compoundable offences can be settled between the parties; non-compoundable offences cannot.

Stages of a Crime

A crime typically passes through four stages: (1) Intention - forming the mental design, (2) Preparation - arranging means to commit the crime, (3) Attempt - doing something directly towards the commission, and (4) Commission - the actual completion of the crime. Generally, the law punishes attempt and commission, not mere intention or preparation (except in special cases like preparation for waging war, dacoity, or counterfeiting).