Proximate Cause
Proximate cause: how the dominant, effective cause of a loss is identified when several events lead up to it, how insured and excluded perils in the chain are treated, and who decides when the cause is disputed.
What it is
A loss often involves a chain of events with several causes. A policy covers some causes and excludes others, so it has to be decided which cause counts.
The principle of proximate cause, causa proxima in Latin, supplies the test. The insurer must identify the dominant, effective cause of the loss. This is a question of efficiency, not of time: the proximate cause may be the first, the last or a middle event in the chain.
The rule that follows is simple. If the proximate cause is a peril insured against, the claim is payable. If it is an excluded peril, the claim is not payable. In marine insurance the principle is written into statute: section 55 of the Marine Insurance Act, 1963 makes the insurer liable for any loss proximately caused by a peril insured against.
Following a chain of events
Where one insured peril leads to the loss, the answer is easy. Lightning that starts a fire which destroys stock is covered under a fire policy: fire caused by lightning is covered, subject to the policy exclusions, and lightning is a named peril in its own right.
Where the chain begins with something that is not an insured peril, the answer changes. Suppose years of wear and tear rust a pipe until it bursts and water damages goods. The proximate cause is gradual wear and tear, which is not an accidental insured peril and is usually excluded, so the claim fails under a basic fire policy. Under a policy that names the bursting of water tanks and pipes as a peril, as the Standard Fire and Special Perils policy does, the outcome depends on how the wear-and-tear exclusion is worded.
Some chains have no automatic answer. An earthquake brings down a wall, which causes an electrical short, which starts a fire, under a policy that covers fire but not earthquake. If fire is found to be the dominant cause the claim may be payable; if the earthquake is, it may not. An express exclusion for earthquake and its consequences can defeat the claim even where fire did the damage.
Negligence, the insured's own acts and concurrent causes
Simple negligence by the insured does not invalidate a claim. If a candle left burning starts a fire, the proximate cause is still fire, an insured peril. Wilful or intentional acts are a different matter and are excluded.
The insured's own act can, however, be treated as the cause. When an owner restarts a car standing in flood water and the engine is damaged, insurers commonly treat the restart, not the flood, as the cause and decline the engine damage where there is no engine-protect add-on. The outcome can depend on the facts and the wording.
Where two independent causes operate together and one of them is excluded, insurers generally rely on the exclusion to decline the claim. Here too the result depends on the policy wording and the applicable case law.
Who decides
The surveyor or investigator reports on the cause, and the insurer decides the claim on that report. If the insured disputes it, the determination rests with the body that hears the dispute: the Insurance Ombudsman, a consumer commission or a court, subject to the usual rights of appeal.
Rules at a glance
Two water-damage claims with different answers
Illustration: two neighbouring textile shops in Surat each find their stock soaked one morning, and each has a fire policy that includes the peril of bursting or overflowing of water tanks and pipes.
In the first shop an overhead tank overflowed suddenly during the night. The dominant cause is the overflow, a named peril, so the loss falls within the cover, subject to the policy terms. In the second shop a pipe that had been corroding for years finally gave way. The insurer points to wear and tear as the real cause, and the answer depends on how that policy's wear-and-tear exclusion is worded.
Key points
- The proximate cause is the dominant, effective cause of the loss, not necessarily the last event in time.
- A loss proximately caused by an insured peril is payable; one proximately caused by an excluded peril is not.
- Simple negligence by the insured does not defeat a claim; wilful acts do.
- A disputed cause is decided by the Ombudsman, consumer commission or court hearing the dispute, subject to the usual rights of appeal.
Common misunderstandings
- The proximate cause is not simply the last thing that happened: it is the dominant cause, which may come first or in the middle of the chain.
- Carelessness by the insured does not by itself defeat a claim: simple negligence is covered, while wilful or intentional acts are excluded.
- The surveyor's view of the cause is not final: a disputed cause is decided by the Ombudsman, consumer commission or court hearing the matter.
Questions people ask
A fire followed an earthquake. Is the fire damage covered?
It depends on which cause is found to be dominant and on the wording. A classic fire policy without the earthquake extension may not respond, and an express exclusion for earthquake and its consequences can defeat the claim even though fire did the damage.
Why is engine damage after flooding often declined?
Because insurers commonly treat the owner's act of restarting the engine in standing water as the cause, not the flood. The result can differ with the facts, the wording and any engine-protect add-on.
Does proximate cause matter outside marine insurance?
Yes. Section 55 of the Marine Insurance Act, 1963 states it for marine policies, but the principle is used in assessing claims across general insurance.
What this lesson relies on
- Marine Insurance Act, 1963 — section 55
- Standard Fire and Special Perils policy — insured perils and exclusions
This lesson was reviewed independently against these sources on 8 October 2026. Rules change: check the current regulation, scheme document or policy wording before relying on any figure. This is education, not advice.