How to Read a Judgment: Ratio, Obiter, Per Incuriam, and What Actually Binds

Study Notes by Akinchan Aggarwal, Advocate — B.A. (Hons.) Gold Medalist, LL.B., LL.M. (Disputes Resolution), UGC–NET, Ph.D. (pursuing)

Here is the sentence a law student most often highlights in a judgment: the one that sounds most quotable.

It is almost never the one that binds.

Every law degree teaches you what the law is. Almost none teach you how to extract it from the document where it actually lives. Students arrive in their final year able to recite Kesavananda and unable to say which sentence in a fifty-page judgment is the ratio, which is obiter, and why a decision of a two-judge Bench delivered last year may be worth nothing at all against a decision from 1973.

This is the piece nobody teaches. It is also the single most transferable skill in the profession: whatever you end up practising, you will spend your career reading judgments and deciding what in them you can use.

The proposition everything else hangs on: a judgment is not a statute. It is not to be read as Euclid's theorems. A decision is an authority for what it actually decides — not for everything that might logically follow from what it says.

Contents

1. The Anatomy of a Judgment
2. The Headnote Is Not the Judgment
3. Ratio Decidendi — What Actually Binds
4. How to Actually Find the Ratio
5. Obiter Dicta
6. Per Incuriam and Sub Silentio
7. Who Binds Whom
8. How to Cite Properly
9. A Ten-Step Reading Method
10. Six Mistakes Students Make
11. Frequently Asked Questions

1. The Anatomy of a Judgment

Before you can find the law in a judgment, you need to know which part of the document you are standing in. A reported Supreme Court judgment has a predictable structure.

Part	What it is, and what it is worth
Neutral citation	The court's own identifier, e.g. 2026 INSC 900. Assigned by the court itself, not a publisher. See Part 8.
Reportable / Non-Reportable	A marking by the court indicating whether it considers the judgment worth reporting. It affects publication, not binding force — a non-reportable judgment of the Supreme Court is still a decision of the Supreme Court, though it will be harder to trace and carries less weight in practice.
Cause title	Parties, appeal number, the order appealed from, the Bench, and the date. Tells you the Bench strength — which, as Part 7 shows, may matter more than anything in the reasoning.
Headnote	Written by the publisher's editors. Not part of the judgment. See Part 2.
Facts	The narrative. Read it properly — the ratio cannot be separated from it.
Issues / questions framed	Often expressly numbered. This is the court telling you what it is about to decide, and by implication what it is not.
Submissions	What counsel argued. Arguments are not holdings. Students regularly quote a submission as though the court had accepted it.
Reasoning	The analysis. Contains the ratio, and also most of the obiter.
Holding / conclusion	What the court decides on each issue.
Operative order	The directions — appeal allowed or dismissed, order set aside, matter remanded, timelines, costs. What actually happens to the parties.
Concurring / dissenting opinions	A concurrence agrees with the result, sometimes on different reasoning. A dissent binds nobody — but has a habit of becoming the law decades later.

2. The Headnote Is Not the Judgment

This deserves its own heading because it is the most common error, and the most consequential.

The bold summary at the top of a reported case — in SCC, AIR or anywhere else — is written by the publisher's editorial team. It is an editorial aid. It has no authority whatsoever. It is not written by the judges, it is not approved by them, and it is sometimes wrong.

Never cite a headnote. Never quote from one in a moot memorial, an answer script, or a written submission. If a proposition matters, find it in the body of the judgment, note the paragraph number, and cite that.

The same caution applies, with less force, to the "short notes", digests and AI-generated summaries that now sit between students and primary sources. They tell you where to look. They are not what you rely on.

3. Ratio Decidendi — What Actually Binds

Article 141 of the Constitution provides that the law declared by the Supreme Court shall be binding on all courts within the territory of India.

Note the words carefully: the law declared. Not everything printed. Not everything said. The binding element is the ratio decidendi — the reason for the decision, the principle on which the case is decided.

The classic Indian statement is in Union of India v Dhanwanti Devi, (1996) 6 SCC 44:

"It is not everything said by a Judge while giving judgment that constitutes a precedent."

The Court explained that every judgment must be read as applicable to the particular facts proved, and that what has to be extracted is the principle on which the case was decided. It identified the essentials of a decision as its findings of material facts — direct and inferential — the statements of the principles of law applicable to the legal problems disclosed by those facts, and the judgment based on the combined effect of the two. The binding element is the second of these, applied to the first.

A decision is an authority for what it decides

The other pillar comes from Lord Halsbury in Quinn v Leathem, adopted by the Supreme Court in State of Orissa v Sudhansu Sekhar Misra, AIR 1968 SC 647. Two propositions:

1. Every judgment must be read as applicable to the particular facts proved, since the generality of the expressions found in it are not intended to be expositions of the whole law but are governed and qualified by the particular facts of the case; and
2. A case is only an authority for what it actually decides — it cannot be quoted for a proposition that may seem to follow logically from it.

In Padma Sundara Rao v State of Tamil Nadu, (2002) 3 SCC 533, a Constitution Bench put it in terms worth memorising:

Courts should not place reliance on decisions without discussing how the factual situation fits in with the fact situation of the decision on which reliance is placed. Observations of courts are neither to be read as Euclid's theorems nor as provisions of a statute, and that too taken out of context. Circumstantial flexibility — one additional or different fact may make a world of difference between conclusions in two cases.

And in Ambica Quarry Works v State of Gujarat, (1987) 1 SCC 213, the Court warned that the ratio of any decision must be understood in the background of the facts of that case, and that what is of the essence is the principle found out upon a reading of the decision as a whole in the light of the questions before the court.

What all of this means for you, concretely. A sentence lifted from paragraph 47 of a judgment, detached from the facts that produced it, is not a precedent. It is a quotation. Opposing counsel will point that out, and a good judge will do it for them.

4. How to Actually Find the Ratio

The theory is easy to state and hard to apply. Two classical tests help, and both have limits.

The material facts test (Goodhart)

Identify the facts the judge treated as material, and the decision reached on those facts. The ratio is the proposition that connects them. Facts the judge treats as immaterial — the parties' names, the exact sums, the day of the week — fall away.

How to use it: ask of every fact in the narrative, "would the outcome have changed if this fact were different?" If yes, it is material. If no, it is background.

The inversion test (Wambaugh)

Take the proposition you think is the ratio. Reverse it. Insert the reversed proposition into the judgment in place of the original. Now ask: would the court have reached the same decision?

• If the decision would change — the proposition is the ratio.
• If the decision would stand anyway — the proposition is obiter.

Its limit: the test breaks down where a court gives two or more independent reasons, each sufficient on its own. Reverse any one and the outcome survives on the others — yet each may be part of the ratio. Where a judgment rests on alternative grounds, treat each ground as capable of being ratio, and say so when you cite it.

A working sequence

1. What were the material facts?
2. What question of law did the court frame?
3. What did it answer, and in whose favour?
4. What proposition, applied to those facts, produced that answer?
5. Invert it. Does the outcome survive?

What survives step 5 is your ratio. Cite it with the paragraph number and, in any serious submission, with a line on why your facts are analogous.

5. Obiter Dicta

Obiter dictum — "a thing said by the way". Observations on a point not necessary for the decision: hypotheticals, remarks on questions not arising, general reflections on the state of the law, answers to arguments the court did not need to reach.

Obiter does not bind. But do not make the opposite error of treating it as worthless:

• Obiter of the Supreme Court carries very great persuasive weight, and High Courts and subordinate courts in practice follow it. Considered obiter of a Constitution Bench is, for most working purposes, treated as near-decisive.
• Obiter is often where a court signals the direction of the law before a suitable case arrives.
• In an argument where no ratio is directly on point, well-chosen obiter is frequently the best material available.

The discipline: call it what it is. Tell the court "this is obiter, but it is the considered obiter of a three-judge Bench and it is directly on the point." That is advocacy. Presenting obiter as though it were ratio is not.

6. Per Incuriam and Sub Silentio

These are the two doctrines that let you say the words every student thinks are impossible: that judgment is not binding on this court.

Per incuriam

Literally, "through want of care". A decision is per incuriam where it has been rendered in ignorance or forgetfulness of a binding statutory provision or a binding precedent — such that, had the court been aware of it, the decision would have been different. Such a decision is not binding.

The doctrine was considered at length by the Supreme Court in A.R. Antulay v R.S. Nayak, (1988) 2 SCC 602.

What it is not. A decision is not per incuriam merely because you think it is wrong, or because it did not consider an argument you would have made, or because a different Bench later took a different view. The doctrine is narrow, and pleading it loosely damages your credibility. You need to point to the specific statutory provision or binding decision that the court did not have before it.

Sub silentio

A decision passes sub silentio — "under silence" — when a point of law involved in it was not perceived by the court, or not present to its mind, and so was never argued or considered. The court decided the case without adverting to the point at all.

In Municipal Corporation of Delhi v Gurnam Kaur, (1989) 1 SCC 101, the Supreme Court held that precedents sub silentio and without argument are of no moment. The Court emphasised that a decision passes sub silentio when the particular point of law was not consciously determined.

And in State of U.P. v Synthetics and Chemicals Ltd, (1991) 4 SCC 139, the Court held that a conclusion reached without any reference to a statutory provision or issue, and without the point having been raised or argued, cannot be deemed to be a "law declared" for the purposes of Article 141.

Why this matters to you as a practitioner and not just as a student. When the other side produces a judgment that appears fatal, these are your two questions. Did that court have the binding provision or precedent before it? And was the point I am arguing actually argued and decided there, or did it pass unnoticed? A surprising number of apparently adverse authorities do not survive both questions.

7. Who Binds Whom

You can identify a ratio perfectly and still get the answer wrong if you have not checked Bench strength.

Situation	Position
Supreme Court → all courts in India	Binding, under Article 141.
Supreme Court → itself	Not bound by its own previous decisions. Established since Bengal Immunity Co. Ltd. v State of Bihar, AIR 1955 SC 661.
Larger Bench → smaller Bench	Binding. A decision of a Constitution Bench binds a three-judge Bench, which binds a two-judge Bench.
Coordinate Bench → coordinate Bench	A Bench of equal strength that disagrees with an earlier decision cannot simply differ from it. The correct course is to refer the matter to a larger Bench — see Central Board of Dawoodi Bohra Community v State of Maharashtra, (2005) 2 SCC 673.
High Court → subordinate courts	Binding, but only on courts within that High Court's territorial jurisdiction.
High Court Division Bench → Single Judge	Binding within the same High Court.
One High Court → another High Court	Persuasive only, never binding. A Bombay decision does not bind the Madras High Court.
Supreme Court obiter → High Courts	Not strictly binding, but of very high persuasive value, and followed as a matter of practice.

The practical consequence students miss: a recent two-judge decision does not displace an older Constitution Bench decision on the same point. If the two conflict, the larger Bench prevails, however old it is and however recent the other. Always note the Bench strength before you get attached to an authority.

On what "law declared" under Article 141 actually covers, see Director of Settlements, A.P. v M.R. Apparao, (2002) 4 SCC 638.

8. How to Cite Properly

Citation is not decoration. A judge who cannot locate your authority in thirty seconds will stop looking.

Neutral citation

The Supreme Court launched a neutral citation system in 2023, extended in phases to earlier judgments. The format is:

2026 INSC 900  =  year  ·  INSC (Supreme Court of India)  ·  the serial number of that judgment in that year.

It is assigned by the court itself, not by a publisher, which makes it stable, free of any reporter's paywall, and identical across every platform. Several High Courts have adopted their own equivalents. Use it, and use it first.

Reporter citations

• SCC — Supreme Court Cases. The most widely accepted reporter; cite it where you have it. Format: (1996) 6 SCC 44.
• AIR — All India Reporter. Older cases are commonly cited this way. Format: AIR 1968 SC 647.
• SCC OnLine — for judgments not yet in the print reporter. Format: 2024 SCC OnLine SC 3809.

The rules that actually matter

1. Pinpoint the paragraph. "Padma Sundara Rao v State of Tamil Nadu, (2002) 3 SCC 533, para 9" is a citation. Without the paragraph it is a suggestion.
2. Give the Bench strength when it helps you — "a Constitution Bench held…" does work that a citation alone does not.
3. Quote accurately, and mark your emphasis. If you italicise or bold within a quotation, say "emphasis supplied".
4. Do not cite what you have not read. The judge will ask about the facts. This is also why an AI-generated summary is a research tool and never a source — verify every citation in the primary text before it goes into anything you sign.
5. Check whether it still stands. Overruled, distinguished, referred to a larger Bench, or stayed — a citation is worth nothing if the case has since been undone.

9. A Ten-Step Reading Method

Use this on the next judgment you open. It takes longer the first ten times and then becomes automatic.

1. Note the court, the Bench strength and the date. Before anything else.
2. Skip the headnote. Or read it only to orient yourself, then forget it.
3. Read the operative order first. The last two paragraphs. Knowing who won tells you what the reasoning was for.
4. Read the facts properly, and list the ones that look material.
5. Find the issues the court framed. Note anything it expressly declined to decide.
6. Separate submissions from findings. Mark where counsel's arguments end and the court's reasoning begins.
7. Locate the reasoning on each issue, and note the paragraph numbers.
8. State the ratio in one sentence, in your own words. If you cannot, you have not found it.
9. Apply the inversion test to what you have written.
10. Check what came after — has it been followed, distinguished, doubted or overruled?

10. Six Mistakes Students Make

1. Citing the headnote. It is not the judgment and it carries no authority.
2. Quoting a submission as a holding. Read the paragraph before it — it may begin "learned counsel submitted".
3. Lifting a sentence away from its facts. The generality of the language is qualified by the case that produced it.
4. Ignoring Bench strength. Newer is not stronger.
5. Treating a dissent as law. It binds nobody today, whatever it may become.
6. Pleading per incuriam because the decision is inconvenient. The doctrine requires a specific binding provision or precedent that the court did not have before it.

11. Frequently Asked Questions

What is the difference between ratio decidendi and obiter dicta?

The ratio is the principle on which the case is decided, applied to its material facts — it is what binds under Article 141. Obiter is anything said by the way, on a point not necessary to the decision. Obiter does not bind, but Supreme Court obiter carries very high persuasive value.

How do I find the ratio of a case?

Identify the material facts, the question the court framed, and its answer. Then state the proposition connecting them and apply the inversion test — reverse it, and ask whether the outcome would change. If it would, that is the ratio. If the decision stands anyway, it is obiter.

Is the headnote part of the judgment?

No. It is written by the publisher's editors, has no authority, and is occasionally inaccurate. Never cite it.

What does per incuriam mean?

"Through want of care" — a decision given in ignorance or forgetfulness of a binding statutory provision or binding precedent, which had the court known of it would have produced a different result. Such a decision is not binding. See A.R. Antulay v R.S. Nayak.

What is a decision sub silentio?

One where the point of law was never perceived, argued or consciously determined by the court. In MCD v Gurnam Kaur, the Supreme Court held that precedents sub silentio and without argument are of no moment.

Is the Supreme Court bound by its own decisions?

No — established since Bengal Immunity. But a Bench of equal strength that disagrees with an earlier decision must refer the matter to a larger Bench rather than simply differ from it.

Does a High Court judgment bind another High Court?

No. It is persuasive only. A High Court binds the courts subordinate to it within its own territorial jurisdiction, and a Division Bench binds a Single Judge of the same High Court.

What is a neutral citation?

A citation assigned by the court itself rather than a publisher — for the Supreme Court, in the form 2026 INSC 900 (year, INSC, serial number). Introduced in 2023 and extended in phases to earlier judgments. It is stable, free and identical everywhere, so cite it first.

Does "Non-Reportable" mean the judgment is not binding?

No. The marking concerns publication, not authority. A non-reportable Supreme Court judgment is still a Supreme Court decision, though in practice it is harder to trace and carries less weight than a reported one.

Can I rely on an AI summary of a judgment?

As a way of finding your way to the right case, yes. As a source, never. Read the primary text, verify that the case exists and says what the summary claims, and cite the paragraph. Counsel have been embarrassed — and worse — for citing authorities they never opened.

Conclusion

Reading a judgment properly is not a literary skill. It is a mechanical one, and like most mechanical skills it looks like talent only from the outside. Bench strength, material facts, the framed issue, the proposition that survives inversion, and the two questions that unpick an adverse authority — that is the whole apparatus, and it fits on a single page.

What it buys you is disproportionate. In a moot, it is the difference between quoting a judgment and using one. In an examination, it is the difference between reciting a case and applying it. And in court, it is the difference between handing up an authority and being able to answer the only question that matters when you do: "What are the facts of that case, and how are they yours?"

Start with the next judgment you open. Read the last two paragraphs first.

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Disclaimer: These notes are prepared for educational purposes for law students, judiciary and AIBE aspirants, and practitioners, and do not constitute legal advice. Case names and citations are given in summary form to assist further reading; readers must verify every citation, and the current status of every decision, against the primary text before relying on it in argument, examination or any written submission. The doctrines discussed here — particularly per incuriam and sub silentio — are narrow and fact-sensitive, and the summaries above are introductory rather than exhaustive. Nothing in this article should be treated as a substitute for reading the judgments themselves.