Indian criminal law | Updated 28 October 2026
IPC Section 80 and BNS Section 18: Accident in Doing a Lawful Act
A genuinely accidental consequence of a lawful act may be excused under criminal law when the act is performed lawfully, without criminal intention or knowledge, and with proper care and caution.
Section 80 IPC: Statutory text
Nothing is an offence which is done by accident or misfortune, and without any criminal intention or knowledge in the doing of a lawful act in a lawful manner by lawful means and with proper care and caution.
Original statutory illustration
A is at work with a hatchet; the head flies off and kills a man who is standing by. Here, if there was no want of proper caution on the part of A, his act is excusable and not an offence.
The illustration turns on the presence or absence of proper caution. An unexpected injury is not automatically exempt from criminal liability if reasonable precautions were neglected.
Section 18 BNS: Accident in doing a lawful act
Section 18 of the Bharatiya Nyaya Sanhita, 2023 continues the accident exception. It addresses acts done by accident or misfortune, without criminal intention or knowledge, while carrying out a lawful act by lawful means and with proper care and caution. The corresponding hatchet illustration is retained in the BNS.
For the enacted text, consult the official Bharatiya Nyaya Sanhita, 2023 (India Code PDF).
Essential conditions for the accident exception
- Accident or misfortune: The harmful result must arise accidentally, not as the intended result of the conduct.
- No criminal intention or knowledge: The actor must not have the relevant criminal intent or knowledge of the harmful result.
- Lawful underlying act: The activity being performed must itself be lawful.
- Lawful manner and means: The act must be performed in a legally permissible manner using lawful means.
- Proper care and caution: Reasonable precautions appropriate to the circumstances must have been exercised.
All these conditions matter. The defence is not a blanket exemption for any incident described as an accident.
What does proper care and caution mean?
Proper care and caution are assessed in the circumstances, including the nature of the activity, foreseeable risks, equipment condition, training, safety procedures and precautions actually taken. The fact that the result was unintended does not, by itself, establish that adequate caution was exercised.
For example, a tool component that breaks unexpectedly despite appropriate inspection and safe handling presents a different question from a tool used after an obvious defect was ignored. Whether the exception applies depends on the evidence and the relevant offence provisions.
Practical illustrations
- Potentially excusable accident: A worker uses a properly maintained tool with appropriate safety precautions, but an unforeseeable mechanical failure causes an injury. The legal conditions must still be proved on the facts.
- Possible negligent conduct: A worker disregards a known equipment defect and causes injury. The lack of proper caution may prevent reliance on the exception.
- Unlawful activity: A harmful consequence occurring during an independently unlawful act does not qualify merely because the particular consequence was unintended.
Accident versus negligence and mistake of fact
| Provision | Legal question |
|---|---|
| IPC Section 80 / BNS Section 18 | Was the harmful result accidental during a lawful act performed with proper care and caution? |
| IPC Section 76 / BNS Section 14 | Was the person bound by law, or acting in good faith under a mistake of fact believing themselves bound? |
| IPC Section 79 / BNS Section 17 | Was the person justified by law, or acting in good faith under a mistake of fact believing themselves justified? |
Where conduct is rash or negligent, the applicable offence provisions and the actual standard of care must be considered separately. Section 80 is an exception, not a substitute for examining those provisions.
Frequently asked questions
Which BNS provision corresponds to IPC Section 80?
Section 18 of the Bharatiya Nyaya Sanhita, 2023, titled "Accident in doing a lawful act".
Does every accidental injury fall under Section 80 IPC?
No. The underlying act, manner and means must be lawful, criminal intention or knowledge must be absent, and proper care and caution must have been exercised.
What if the person did not intend harm but acted carelessly?
The exception may not apply if proper care and caution were lacking. Liability depends on the elements of any offence charged and the proven facts.
Does IPC Section 80 still apply after 1 July 2024?
The BNS generally governs offences committed from 1 July 2024 onward. IPC provisions can remain relevant to earlier conduct under the applicable savings and transitional rules.
Official legal sources
- India Code: Bharatiya Nyaya Sanhita, 2023, Section 18
- India Code: Official central legislation database
This article is general legal information. The applicable law and outcome depend on the date of conduct, evidence and facts of each case.