Theories of Attempt in Criminal Law: Proximity, Impossibility, Object and On the Job Theories

The doctrine of attempt asks a hard question: at what point does the actor's conduct cross from preparation into criminal execution? Different legal traditions have offered different answers. English common law developed the proximity test in R v Eagleton. Continental jurists formulated the theory of impossibility. Salmond and the common law of the twentieth century advanced the object theory, or doctrine of equivocality. The American Model Penal Code offered the substantial step test. Indian courts, particularly in State of Maharashtra v. Mohd. Yakub, have adopted a multi-theory approach, drawing on each tradition where the facts require. This module walks through the five principal theories and their application in Indian and comparative criminal law.

1. Introduction

Why theories of attempt are needed

The criminal law needs a doctrinal criterion for distinguishing the two stages that are both external conduct: preparation (not punishable) and attempt (punishable). Without such a criterion, courts would have to decide each case on unarticulated intuitions, leading to inconsistency and unpredictability. The various theories of attempt supply the criterion, each in a different way. Each theory has strengths and weaknesses, and each has been adopted, wholly or in part, by different jurisdictions.

The classical common law approach

The classical common law approach, developed in the nineteenth century, was the proximity test of R v Eagleton. It asked whether the actor's conduct was immediately connected with the commission of the offence. Where it was, the conduct was attempt; where it was remote, it was preparation. This test was widely applied but proved insufficient in cases where the conduct was clearly directed at the crime but was still some distance from completion.

The variety of doctrinal approaches

The five principal theories

Proximity theory. R v Eagleton (1855). How close is the conduct to the completed offence.
Theory of impossibility. Asgarali Pradhania (classical) vs Munah binte Ali (modern). Can the offence be completed.
Object theory (equivocality). Salmond's formulation. Does the conduct unambiguously speak of the criminal object.
On the job theory (series of acts). Illustration to Section 62 BNS. Has the actor begun to do the criminal act itself.
Substantial step test. US Model Penal Code. Is the conduct a substantial step towards commission.

2. Proximity Theory

R. v. Eagleton and the classical test

📖 R. v. Eagleton, (1855) 6 Cox CC 559

The accused, a baker, had contracted with the parish to supply bread to the poor. He was charged with attempting to obtain money by false pretences by claiming payment for bread he had not supplied. Baron Parke, delivering the judgment of the English Court, held that the act constituting attempt must be immediately connected with the commission of the offence, not merely a step in the preparation. The classical proximity test was born.

Baron Parke's formulation: acts remotely leading towards the commission of the offence are not to be considered as attempts to commit it. Only the act which is immediately connected with the offence is an attempt.

Physical and temporal proximity

Proximity has two dimensions:

Physical proximity. How close is the actor in space to the site of the completed offence. A person about to fire a gun at his victim is physically proximate. A person driving towards the victim's town, an hour away, is less so.
Temporal proximity. How close is the actor in time to the moment of completion. A person about to inject the poison is temporally proximate. A person still purchasing the poison ingredients is less so.

Application in Indian cases

Indian courts have applied the proximity test in a number of cases. Malkiat Singh v. State of Punjab, though better known as the locus poenitentiae case, also considered proximity: the paddy truck was still 32 miles from the border, and the accused was not physically or temporally proximate to the completed offence of exporting from Punjab. State of Maharashtra v. Mohd. Yakub, while primarily applying the multi-test approach, treated proximity as one of the relevant considerations: the silver ingots were being driven towards the sea, and the accused was becoming physically closer to the completed offence.

Limits of the theory

The proximity test is criticised for being under inclusive and over inclusive. It is under inclusive because it may exclude clear cases of attempt where the actor is still some distance from completion (Abhayanand Mishra: the false application was still far from the actual cheating, but the submission was clearly attempt). It is over inclusive because it may include conduct that is merely preparatory but happens to be physically close (a person standing next to a safe holding a gun, but not yet drawing it).

3. Theory of Impossibility

Legal impossibility and factual impossibility

The theory of impossibility asks whether the offence attempted could have been completed. It distinguishes two forms of impossibility:

Factual impossibility. The offence was impossible to complete because of some fact of the outside world that the actor did not know. The pocket was empty; the victim was already dead; the vault was already emptied. Modern law generally does not treat factual impossibility as a defence.
Legal impossibility. The completed act would not have been an offence at law. The actor thought smoking cannabis was illegal, but it was not; he thought the goods he sold were stolen, but they were not. Legal impossibility is more difficult, but modern law also tends to reject it as a defence in most cases.

The classical position: Asgarali Pradhania

📖 Asgarali Pradhania v. Emperor, AIR 1933 Cal 893

The accused administered a substance to the complainant intending to cause miscarriage. The substance turned out to be harmless. The Calcutta High Court held that the accused was not guilty of attempt to cause miscarriage, because his act could never have caused the offence. The judgment applied a doctrine of legal impossibility. The classical position: if the offence could not have been completed, no attempt has occurred.

The modern rejection: Munah binte Ali

📖 Munah binte Ali v. Public Prosecutor, [1958] MLJ 159

The Malaysian court took the opposite view. An accused who had administered a substance believing it capable of causing miscarriage, where the substance was in fact incapable, was guilty of attempt. The mental element was present; the actor's mistake about the physical properties of the substance did not exclude criminal liability. The theory of impossibility was rejected. Rule: the actor's intention and conduct, judged from his own perspective, are what matter for attempt.

Haughton v. Smith and the English position

📖 Haughton v. Smith, [1975] AC 476

The House of Lords held that where the offence attempted was legally impossible (the accused handled stolen goods that had been recovered by the police and were no longer legally stolen), no attempt had occurred. The judgment was controversial and was reversed by statute. The Criminal Attempts Act, 1981, provides that impossibility is not a defence to attempt in English law.

The modern Indian position, reflected in Section 62 BNS through its focus on the act done towards the commission of the offence with the required intention, tends towards Munah binte Ali rather than Asgarali Pradhania. Where the actor takes steps intending to commit the offence, and would have succeeded but for a fact he did not know, he is guilty of attempt.

4. Object Theory (Doctrine of Equivocality)

Salmond's formulation

Sir John Salmond, in his Jurisprudence, offered a distinctive formulation of the attempt doctrine. He argued that acts of attempt must be such as by their own significance would justify the inference of the criminal object. Where the actor's conduct is consistent only with the criminal purpose and cannot be explained by any innocent alternative, it is attempt. Where the conduct could plausibly have an innocent explanation, it is preparation.

Salmond's formulation of the object theory

An attempt is an act of such a nature that it is itself evidence of the criminal intent with which it is done. A criminal attempt bears criminal intent upon its face. Res ipsa loquitur: the thing speaks for itself.

The res ipsa loquitur test

The object theory is sometimes called the res ipsa loquitur test, from the Latin phrase meaning the thing speaks for itself. The test looks at the actor's conduct in isolation and asks: does this conduct, viewed on its own, speak of the criminal object? If yes, attempt. If not, preparation. The advantage of the test is that it does not require the court to enter the actor's mind: the objective conduct is enough.

Application: R. v. Barker

📖 R. v. Barker, [1924] NZLR 865

The New Zealand Court applied Salmond's doctrine of equivocality. The accused's conduct had to speak for itself as being directed at the crime. Where the conduct was equivocal (equally consistent with an innocent explanation), it was preparation, not attempt. The judgment is one of the classical applications of the object theory.

The object theory is criticised for being circular. To determine whether the conduct speaks of the criminal object, the court must have some idea of what the criminal object was, which in turn requires evidence of intention. If the intention is proved by other means (confessions, prior statements, other acts), the theory becomes redundant. If the intention must be inferred from the conduct alone, the theory struggles.

5. On the Job Theory (Series of Acts Theory)

The theory in outline

The on the job theory, also called the series of acts theory, asks whether the actor has begun to perform the criminal act itself, or whether he is still doing acts that merely make the crime possible. The theory identifies the offence as a series of specific acts (drawing the weapon, aiming, firing), and asks whether the actor has begun any of these acts. If yes, attempt. If no, preparation.

Illustration to Section 62 BNS

Section 62 BNS contains an illustration that reflects the on the job theory. The illustration is that A, intending to steal from Z, breaks open a box in Z's house, believing it contains jewels. The box turns out to be empty. A has committed attempt to steal. The relevant act is not the breaking of the box, which is preparation for the theft, but the beginning of the theft itself: reaching into the box with dishonest intention. The illustration shows that the actor need not have completed the theft to have committed attempt; beginning the theft act is enough.

Abhayanand Mishra and State of Maharashtra v. Mohd. Yakub

Abhayanand Mishra applied a version of the on the job theory: submission of the false application was the beginning of the cheating act, and the accused was thus guilty of attempt. State of Maharashtra v. Mohd. Yakub also applied it: loading the silver into the truck and driving towards the sea were the beginning of the smuggling act, and the accused were thus at attempt.

The on the job theory has the advantage of being intuitive: the criminal law punishes the beginning of criminal conduct. It has the disadvantage of requiring the court to identify what the criminal act is, which in complex offences may be difficult.

6. Substantial Step Test

The US Model Penal Code approach

The American Model Penal Code, drafted by the American Law Institute and adopted in many US states, offers a distinctive test. It provides that an actor is guilty of attempt if he does or omits to do anything which, under the circumstances as he believes them to be, is an act or omission constituting a substantial step in a course of conduct planned to culminate in the commission of the crime.

Substantial step and corroboration of criminal purpose

The substantial step must strongly corroborate the actor's criminal purpose. The MPC lists specific examples of conduct that, if strongly corroborative, may constitute a substantial step: lying in wait, searching for or following the victim, enticing the victim to a place, reconnaissance of the site of the crime, unlawful entry of the site, and possession of specialised materials.

Comparison with English and Indian tests

US Substantial Step Test	English Proximity Test	Indian Multi-Test Approach
Any substantial step in a course of conduct planned to culminate in the commission of the offence.	An act immediately connected with the commission of the offence.	An act done towards the commission of the offence, with room for withdrawal exhausted.
Broader than the proximity test. Reaches back to lying in wait and reconnaissance.	Focused on the moment of the offence. Excludes acts of preparation.	Multi-test approach: proximity, locus poenitentiae, equivocality all relevant.
Requires strong corroboration of the criminal purpose.	No corroboration requirement beyond the act itself.	Corroboration factor in the object theory considerations.
Adopted in most US states.	Classical common law. Superseded in England by the Criminal Attempts Act, 1981.	Section 62 BNS with judicial elaboration.

7. Locus Poenitentiae Theory (Brief)

The locus poenitentiae theory, treated in detail in a separate module in this series, is the classical Indian theory. It asks whether the actor still had room to withdraw at the moment in question. If he could have stopped and turned back without committing the offence, he was at preparation. If he had committed himself and could not withdraw without active reversal, he was at attempt. Malkiat Singh v. State of Punjab, AIR 1970 SC 713, is the classical application.

The theory complements the other theories: proximity, object and on the job all focus on the acts done; locus poenitentiae focuses on the room for withdrawal that remains. In Indian criminal law, courts often apply the theories together, finding attempt where multiple theories converge and preparation where they diverge.

8. The Five Theories Compared

Theory	Focus and Comment
Proximity: how close is the conduct to the completed offence.	Objective focus on the physical and temporal closeness. Vulnerable to under-inclusion (Abhayanand Mishra) and over-inclusion.
Impossibility: could the offence have been completed.	Modern position rejects impossibility as a defence. The actor's intention and conduct, judged from his perspective, are what matter.
Object (equivocality): does the conduct unambiguously speak of the criminal object.	Objective focus on the meaning of the conduct. Circular where intention must be inferred from the conduct alone.
On the job: has the actor begun the criminal act itself.	Intuitive focus on the beginning of criminal execution. Requires identifying what the criminal act is.
Substantial step: has the actor taken a substantial step towards commission.	Broader than proximity. Reaches back to preparatory conduct that strongly corroborates purpose. US Model Penal Code.
Locus poenitentiae: does the actor still have room to withdraw.	Focus on the actor's freedom of choice. Classical Indian test. Complements the other theories.

9. The Indian Position: A Multi-Theory Approach

Indian criminal law does not commit itself exclusively to any one theory. The Supreme Court, particularly in State of Maharashtra v. Mohd. Yakub, has adopted a multi-theory approach. The court considers proximity, locus poenitentiae, equivocality (object theory), the on the job factor (has the actor begun the criminal act), and the seriousness of the offence. Where multiple theories converge on the conclusion of attempt, the case is strong. Where they diverge, the court must decide on the balance of considerations.

This flexible approach has the advantage of responding to the wide variety of situations in which the attempt question arises. It has the disadvantage of leaving the outcome uncertain until the court has weighed the factors, and it exposes the doctrine to charges of unpredictability. But it is the position now settled in Indian criminal law.

The multi-theory approach captured in Mohd. Yakub

The test to be applied is a combination of factors: proximity of the acts to the completed offence, the actor's opportunity to withdraw, the unambiguous nature of the conduct as directed at the criminal object, and the actor's commitment to the criminal course. No single factor is decisive; all must be weighed.

10. Consolidated Landmark Judgments

R. v. Eagleton, (1855) 6 Cox CC 559. Foundational English case. Proximity test. Baron Parke.
R. v. Robinson, [1915] 2 KB 342. Insurance fraud. Preparation, not attempt. Application of proximity test.
Asgarali Pradhania v. Emperor, AIR 1933 Cal 893. Impossibility as a defence. Classical position.
Munah binte Ali v. Public Prosecutor, [1958] MLJ 159. Impossibility rejected. Modern position.
R. v. Barker, [1924] NZLR 865. Object theory. Salmond's formulation applied.
Haughton v. Smith, [1975] AC 476. English case on impossibility. Later reversed by statute.
Malkiat Singh v. State of Punjab, AIR 1970 SC 713. Locus poenitentiae theory. Classical Indian application.
Abhayanand Mishra v. State of Bihar, AIR 1961 SC 1698. On the job theory. Submission of false document as beginning of the crime.
State of Maharashtra v. Mohd. Yakub, (1980) 3 SCC 57. Multi-theory approach. Foundational modern Indian case.
Om Prakash v. State of Punjab, AIR 1961 SC 1782. Attempt through continuing conduct.
Koppula Venkat Rao v. State of Andhra Pradesh, (2004) 3 SCC 602. Modern statement of attempt in sexual offences.
Sudhir Kumar Mukherjee v. State of West Bengal, AIR 1973 SC 2655. Attempt under special statutes.
United States v. Jackson, 560 F.2d 112 (2d Cir 1977). Application of the substantial step test in the US federal courts.
R. v. Gullefer, [1990] 1 WLR 1063. Modern English case. Application of the more than merely preparatory test under the Criminal Attempts Act, 1981.
R. v. Jones, [1990] 1 WLR 1057. English case on attempt. Merely more than preparatory is enough.

Frequently Asked Questions

What are the main theories of attempt in criminal law?

Five principal theories: (i) proximity theory (R v Eagleton, 1855), asking how close the conduct is to the completed offence; (ii) theory of impossibility, asking whether the offence could have been completed; (iii) object theory or equivocality doctrine, asking whether the conduct unambiguously speaks of the criminal object; (iv) on the job theory or series of acts theory, asking whether the actor has begun the criminal act itself; and (v) substantial step test, asking whether the actor has taken a substantial step towards commission. The classical Indian test of locus poenitentiae complements these.

What is the proximity theory of attempt?

The proximity theory, developed in R v Eagleton (1855), asks whether the actor's conduct is immediately connected with the commission of the offence. Where it is, the conduct is attempt; where it is remote or preliminary, it is preparation. Proximity has two dimensions: physical closeness in space and temporal closeness in time. The theory is objective and looks at the conduct rather than the actor's mind.

What is the object theory of attempt?

The object theory, also called the doctrine of equivocality or the res ipsa loquitur test, was formulated by Salmond. It asks whether the actor's conduct, viewed in isolation, unambiguously points to the criminal object. Where the conduct can only be explained as directed at the crime, it is attempt. Where it could plausibly have an innocent explanation, it is preparation. R v Barker, [1924] NZLR 865, is a classical application.

What is the theory of impossibility?

The theory of impossibility asks whether the offence attempted could have been completed. If not, some jurisdictions have held that no attempt occurred. Asgarali Pradhania v Emperor, AIR 1933 Cal 893, applied the classical position. Modern law, reflected in Munah binte Ali v Public Prosecutor and Section 62 BNS, generally rejects impossibility as a defence: what matters is the actor's intention and conduct, judged from his own perspective.

What is the on the job theory of attempt?

The on the job theory, also called the series of acts theory, asks whether the actor has begun to perform the criminal act itself, or whether he is still doing acts that merely make the crime possible. If yes, attempt. If no, preparation. The illustration to Section 62 BNS reflects this theory: A breaking open Z's box to steal has committed attempt, though the box is empty. Abhayanand Mishra applied the theory to the submission of a false application to a university.

How does Indian law choose among these theories?

Indian criminal law adopts a multi-theory approach, most clearly stated in State of Maharashtra v Mohd Yakub, (1980) 3 SCC 57. The Supreme Court considers proximity, locus poenitentiae, equivocality, on the job factor, and the seriousness of the offence together. Where multiple theories converge on the conclusion of attempt, the case is strong. No single theory is decisive; the court decides on the balance of considerations.