Insights · Compliance · Liability cover
When a ship spills oil, loses a cargo or injures a crew member, the bill can run into hundreds of millions. Protection & indemnity clubs are the mutual insurers that carry that risk — and the International Group is how they share the very largest claims between them.
Ordinary marine insurance — hull and machinery cover — pays for damage to the ship itself. It does almost nothing for the far larger, far less predictable bills that a ship can run up against the rest of the world: the cargo it loses, the seafarer it injures, the quay it strikes, the oil it spills, the wreck a state orders it to remove. Those are liabilities, and they are insured by a distinct kind of organisation: the protection and indemnity club.
A P&I club is a mutual. There are no outside shareholders. The shipowners who buy the cover are also, collectively, the insurer — they contribute "calls" into a common fund and draw on it when one of them faces a claim. This structure goes back to the nineteenth-century shipowners' associations, and it survives because liability risk is lumpy and catastrophic in a way ordinary commercial insurers are wary of underwriting alone.
The cover is broad by design. A typical club policy responds to:
The largest clubs belong to the International Group of P&I Clubs. Its member clubs between them provide liability cover for around 90% of the world's ocean-going tonnage — making the Group one of the most concentrated risk-sharing arrangements in any industry. The clubs compete for members, but they collaborate on the one thing none of them could carry alone: the truly enormous claim.
That collaboration works in layers. The principle is that the more a claim costs, the more widely the cost is spread.
| Layer | Who pays | Indicative size |
|---|---|---|
| Individual retention | The member's own club | first ~US$10m |
| The Pool | Shared across all Group clubs | ~US$90m above that |
| Group Excess Loss (GXL) | Market reinsurers, bought jointly | ~US$2bn above ~US$100m |
| Overspill | Mutualised across the Group again | a further layer above GXL |
Below the pool, a club handles a claim from its own resources. Once a claim climbs past the club's retention — of the order of US$10 million — the excess enters the pool and is shared among all the Group clubs up to roughly US$100 million. Above that, the Group buys a single Group Excess Loss (GXL) reinsurance contract on the open market — the largest marine reinsurance placement in the world — which adds billions of dollars of cover per incident, with a further mutualised "overspill" layer above it. The exact figures are reset for each policy year, but the shape stays the same: small claims local, vast claims spread across the whole industry.
The pooling and reinsurance arrangements are what let a single club, holding a modest retention, stand behind a casualty that could cost billions. International Group of P&I Clubs, reinsurance structure
P&I cover is not just an insurance detail — it is a practical condition of trading. Ports, charterers and counterparties expect a ship to carry recognised liability cover, and several sanctions regimes lean on it directly. The Russian oil price cap, for example, ties Western services including P&I insurance to compliance with the cap. Group clubs run their own sanctions screening before they will insure a voyage. A vessel that has lost mainstream P&I cover, or never had it, often turns up instead in the shadow fleet with obscure or unverifiable insurance — itself a strong risk signal.
Insurance is one layer of the picture that sits alongside ownership, flag and class. Tracing who actually controls a vessel — through its beneficial ownership chain — is often the first step to knowing which club, if any, stands behind it. On Marifest you can search any of 97,000+ vessels in the registry, resolve the owner and operator behind the hull, and screen the vessel against the OFAC, EU, UN and UK lists in one view. The insurance and liability terms used here are defined in the maritime glossary.
How Marifest uses it
P&I cover attaches to whoever controls a ship. Marifest resolves that ownership chain and screens it, so you can see who stands behind a vessel before you trust it.
Every file ties the IMO number to the registered owner, manager and operator — the entities a P&I club actually insures.
The same sanctions screen that Group clubs apply runs in the registry: OFAC, EU, UN and UK, keyed to the IMO number.
Ships outside mainstream cover often carry the same markers as the shadow fleet — obscure flags, opaque owners, an ageing hull — all on the file.
Specs, flag, ownership and compliance standing sit together, so the insurance question is answered in context, not isolation.