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BNS Section 6 – Fractions of Terms of Punishment

Adv. Kuldeep Kumar June 22, 2026 5 min read

Section Overview

Section Number: 6

Section Title: Fractions of Terms of Punishment

Act: Bharatiya Nyaya Sanhita, 2023 (BNS)

Status: Active

Applicability: Applicable throughout India wherever the Bharatiya Nyaya Sanhita, 2023 is in force.

BNS Section 6 is a technical but important provision dealing with the calculation of fractions of imprisonment terms. Criminal laws often refer to fractions such as one-half, one-third, or one-fourth of a sentence while determining punishments, remission, commutation, parole eligibility, or other legal consequences.

To avoid confusion and maintain uniformity, Section 6 provides a standard rule for calculating such fractions. The section states that when a fraction of a term of punishment is required to be calculated, imprisonment for life shall be reckoned as imprisonment for twenty years unless the context requires otherwise.

This provision replaces Section 57 of the Indian Penal Code, 1860 and continues the same legal principle.

Section Explanation

Simple Explanation (Plain English / Hinglish)

BNS Section 6 batata hai ki jab kisi kanoon mein imprisonment ke kisi fraction (jaise 1/2, 1/3, ya 1/4) ki calculation karni ho, tab life imprisonment ko 20 saal mana jayega.

Yeh rule sirf calculation ke purpose ke liye hai.

Iska matlab yeh nahi hai ki life imprisonment sirf 20 saal ki hoti hai.

Agar kisi law mein kaha gaya ho ki punishment ka aadha hissa calculate karna hai aur vyakti life imprisonment serve kar raha hai, to calculation ke liye life imprisonment ko 20 saal maana jayega.

Legal Definition (Original Law Text)

In calculating fractions of terms of punishment, imprisonment for life shall be reckoned as equivalent to imprisonment for twenty years unless otherwise provided.

Practical Interpretation

The primary purpose of Section 6 is mathematical convenience.

Suppose a law requires calculation of one-half of a life sentence.

For this purpose:

  • Life Imprisonment = 20 Years

  • One-Half = 10 Years

Similarly:

  • One-Third = 6 Years 8 Months

  • One-Fourth = 5 Years

However, this provision does not alter the actual meaning of life imprisonment.

The Supreme Court has repeatedly clarified that life imprisonment ordinarily means imprisonment for the remainder of the convict's natural life unless legally modified through remission, commutation, or other lawful processes.

Punishment & Legal Classification

Punishment

Section 6 does not prescribe any punishment.

Instead, it provides a method for calculating fractions of imprisonment terms.

Bailable / Non-Bailable

Not Applicable.

Cognizable / Non-Cognizable

Not Applicable.

Compoundable

Not Applicable.

Triable By

Not Applicable.

Since Section 6 is merely a calculation provision and does not create an offence, procedural classifications do not apply.

Why This Provision Matters

Without a standard calculation rule, courts and authorities could interpret fractions of life imprisonment differently.

Section 6 creates certainty by treating life imprisonment as twenty years solely for computational purposes.

This helps courts, prison authorities, and government agencies apply criminal laws consistently.

IPC ↔ BNS Mapping

IPC Section: Section 57 IPC

BNS Equivalent: Section 6 BNS

Status: Replaced

Comparison Between IPC and BNS

BNS Section 6 substantially reproduces the principle contained in IPC Section 57.

The legal effect remains unchanged.

The provision continues to serve as a statutory formula for calculating fractions of life imprisonment whenever required by law.

Key Point

Many people mistakenly believe that life imprisonment equals twenty years because of this section.

That interpretation is incorrect.

The section merely provides a method of calculation and does not define the actual duration of life imprisonment.

Real-Life Examples

Example 1

A prison regulation requires completion of one-half of a life sentence before consideration for a particular benefit.

For calculation purposes:

  • Life Imprisonment = 20 Years

  • One-Half = 10 Years

The authority may use this calculation while applying the regulation.

Example 2

A law refers to one-third of a life sentence.

Under Section 6:

  • Life Imprisonment = 20 Years

  • One-Third = Approximately 6 Years and 8 Months

This fraction can be calculated uniformly across cases.

Example 3

A prisoner argues that life imprisonment automatically ends after twenty years because Section 6 treats life imprisonment as twenty years.

The argument is legally incorrect because Section 6 applies only for calculating fractions of punishment and not for determining the actual duration of life imprisonment.

Landmark Judgments

Case Name: Gopal Vinayak Godse v. State of Maharashtra

Court: Supreme Court of India

Key Takeaway:

The Supreme Court held that life imprisonment ordinarily means imprisonment for the remainder of the convict's natural life unless remission is granted according to law.

Case Name: Maru Ram v. Union of India

Court: Supreme Court of India

Key Takeaway:

The Court clarified the relationship between life imprisonment, remission, and executive powers.

Case Name: Swamy Shraddananda v. State of Karnataka

Court: Supreme Court of India

Key Takeaway:

The Court reaffirmed that life imprisonment may extend for the entire natural life of the convict and is not automatically limited to twenty years.

Legal Insights

When is this Section Applied?

Section 6 is applied whenever a law requires calculation of a fraction of imprisonment and life imprisonment is involved.

Common situations include:

  • Sentencing calculations

  • Remission calculations

  • Prison administration matters

  • Statutory eligibility assessments

  • Government notifications regarding imprisonment

Common Misuse Scenarios

  1. Believing life imprisonment equals twenty years.

  2. Assuming every life convict must be released after twenty years.

  3. Ignoring Supreme Court judgments on life imprisonment.

  4. Using Section 6 to challenge a valid life sentence.

  5. Confusing calculation provisions with sentencing provisions.

Defenses Available

Since Section 6 does not create an offence, no direct defense is available.

However, legal arguments may arise regarding:

  • Incorrect sentence calculations

  • Wrong application of fractions

  • Administrative errors

  • Misinterpretation of statutory provisions

Courts may intervene if authorities incorrectly calculate imprisonment terms contrary to Section 6.

Importance of Section 6

Although Section 6 appears simple, it performs an important administrative function.

The provision ensures:

  • Consistency in sentencing calculations.

  • Uniformity across jurisdictions.

  • Predictability in prison administration.

  • Clarity in interpreting criminal laws.

Without this rule, courts and authorities could reach different conclusions when calculating fractions of life imprisonment.

Difference Between Life Imprisonment and Twenty Years

One of the most misunderstood aspects of criminal law is the distinction between life imprisonment and twenty years.

Life imprisonment generally means:

  • Imprisonment for the entire natural life of the convict.

Twenty years under Section 6 means:

  • A legal fiction created solely for calculation purposes.

Therefore, the two concepts are entirely different.

Disclaimer: This article is for general informational purposes only and does not constitute legal advice. Please consult a qualified advocate for your specific legal matter.
Adv. Kuldeep Kumar
Verified Advocate
Bar Council Reg: BR/196/2015

Frequently Asked Questions

BNS Section 6 provides the rule for calculating fractions of imprisonment terms and treats life imprisonment as twenty years for calculation purposes.

No classification applies because Section 6 does not create an offence.

No punishment is prescribed. The section only provides a method for calculation.

BNS Section 6 is the equivalent provision of IPC Section 57.

No. Twenty years is used only for calculating fractions of punishment.

The law creates a legal fiction to simplify calculations involving fractions of punishment.

No. Life imprisonment generally continues for the convict's entire natural life unless lawfully modified.

It is applied whenever a fraction of imprisonment must be calculated under criminal law.

No. It is purely a calculation provision.

It ensures uniformity and consistency in calculating fractions of imprisonment terms across India's criminal justice system.
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