Marine vs Cargo Insurance: Key Differences 2026

What 'Marine Insurance' Actually Covers

Marine insurance is a class of insurance that covers physical and financial risks arising from the use of the sea — and, by extension, inland waterways, ports and intermodal transit. In the London market, it is governed by the Marine Insurance Act 1906, which remains the foundational statute for UK placements and is incorporated by reference into most company-market and specialist-underwriter policy wordings. The Act defines an insurable interest, establishes the duty of fair presentation (now updated by the Insurance Act 2015), and sets out the framework for indemnity, abandonment and sue-and-labour obligations.

Within that umbrella, marine insurance splits into four principal lines: hull and machinery (H&M), cargo, protection and indemnity (P&I), and freight and demurrage. Each line covers a different interest. Your hull policy responds to physical damage to your vessel. Your P&I entry covers third-party liabilities — collision liability above the running-down clause (RDC) limit in your hull policy, crew injury under MLC 2006, wreck removal and pollution. Cargo insurance covers the goods in transit. Freight liability covers your legal liability as a carrier for loss of or damage to cargo in your custody. These are not interchangeable, and a gap between them is where uninsured losses live.

When a broker or underwriter refers to 'marine insurance' on a slip or MRC (Market Reform Contract), they are identifying the class, not the specific cover. Your placement documents should always specify the sub-class, the insured interest, the assured's name and the applicable clauses. If they do not, ask before you sign.

Cargo Insurance: What It Covers and What It Does Not

Cargo insurance covers your financial interest in goods while they are in transit — by sea, air, road or rail, or in combination. The standard wordings used in the London market are the Institute Cargo Clauses (ICC), published by the International Underwriting Association. There are three tiers: ICC (A) provides the broadest cover on an all-risks basis, subject to named exclusions; ICC (B) covers a defined list of perils including fire, explosion, stranding, sinking, collision and earthquake; ICC (C) is the most restrictive, covering only major casualties. Most cargo owners placing through a London-market specialist should be on ICC (A) unless the commodity or trade route makes a narrower form commercially appropriate.

The exclusions that catch cargo owners out most frequently are: inherent vice (the natural deterioration of the goods themselves), inadequate packing, delay, and loss of market. These exclusions apply under all three ICC tiers. If your cargo is temperature-sensitive, perishable or subject to condensation damage, you need to discuss specific extensions — and confirm whether the underwriter requires a pre-shipment survey or temperature monitoring data as a condition of cover.

General average is a separate but related exposure. Under the York-Antwerp Rules, if the shipowner declares general average — for example, following a machinery failure that requires emergency port entry — you as cargo owner may be required to contribute to the shared loss before your goods are released. A cargo policy on ICC (A) or (B) will typically respond to your general average contribution, but you must have an insurable interest in the cargo at the time of the sacrifice, and your policy must be in force. If you are shipping on CIF or CIP Incoterms, the seller is obliged to provide cargo insurance, but the minimum obligation under CIP (Incoterms 2020) is ICC (A) — confirm this is what has actually been placed before the goods leave the warehouse.

• ICC (A): all risks less named exclusions — broadest form, recommended for most general cargo
• ICC (B): named perils including stranding, fire, collision, earthquake, washing overboard
• ICC (C): major casualties only — total loss focus, unsuitable for most break-bulk or containerised cargo
• Common exclusions across all tiers: inherent vice, delay, inadequate packing, loss of market, wilful misconduct of the assured
• Extensions available: war and strikes (Institute War Clauses, Institute Strikes Clauses), refrigerated cargo, exhibition cover, open cover for high-frequency shippers

Hull and Machinery: The Vessel Owner's Core Cover

If you operate a vessel, your hull and machinery policy covers physical loss of or damage to the ship itself, including her machinery, equipment and, where endorsed, her freight at risk. The standard London-market wording is the Institute Time Clauses — Hulls (ITC-H 1983 or the more recent ITC-H 2002 revision), though many specialist underwriters use bespoke forms. The Inchmaree clause, incorporated into ITC-H, extends cover to latent defects in hull or machinery and negligence of masters, officers or crew — a critical extension for operators whose vessels are managed by third parties.

Your hull policy is not a substitute for P&I. The running-down clause (RDC) in ITC-H covers your liability to a third-party vessel in a collision, but only up to three-quarters of the collision liability (the four-fourths RDC endorsement is available but must be specifically agreed). Wreck removal, cargo liability, crew injury and pollution are P&I matters. If you are not entered in a P&I club or have a standalone P&I policy, those liabilities sit uninsured — and under the Convention on Limitation of Liability for Maritime Claims (LLMC 1976, as amended by the 1996 Protocol), the limitation fund is calculated in Special Drawing Rights (SDRs) based on your vessel's tonnage, but limitation is not a defence to every claim type.

Deductibles on hull policies widen when your vessel is laid up out of class, trading outside the Institute Warranty Limits (IWL) without a held-covered endorsement, or operating in a designated war-risk area. If your trading pattern takes you into areas listed under the Joint War Committee (JWC) Hull War, Strikes, Terrorism and Related Perils Listed Areas, you need a separate war-risk endorsement or a standalone war policy — and you need to notify your broker before the vessel enters, not after.

Freight Liability and P&I: The Carrier's Exposure

If you are a freight forwarder or carrier issuing bills of lading, you have a liability exposure that neither a cargo policy nor a hull policy covers. Your liability to cargo owners for loss or damage to goods in your custody is governed by the applicable carriage convention. For sea carriage, UK-issued bills of lading are subject to the Hague-Visby Rules (Carriage of Goods by Sea Act 1971), which limit your liability per package or per kilo — but limitation is lost if the claimant can prove reckless conduct. The Hamburg Rules and the Rotterdam Rules offer different liability regimes and apply in different jurisdictions; if you are issuing multimodal transport documents for EEA shipments, confirm which regime governs each leg.

Freight liability cover (also called freight forwarder's liability or FFL) responds to your legal liability as a carrier or bailee. It is distinct from cargo insurance, which covers the cargo owner's interest in the goods. A common and expensive mistake is for a freight forwarder to assume that because the shipper has cargo insurance, the forwarder's own liability is covered. It is not. The shipper's underwriter will pay the shipper's claim and then subrogate against you as the responsible carrier.

P&I cover for vessel operators extends beyond cargo liability to include crew claims under MLC 2006 (repatriation, medical expenses, death and disability), stowaways, fines and penalties, and oil pollution liability under the Civil Liability Convention (CLC). If you are operating vessels in UK waters, the MCA requires evidence of financial security for MLC 2006 crew claims as a condition of port entry. Your P&I entry or a standalone MLC certificate satisfies this requirement; a hull policy alone does not.

Choosing the Right Cover for Your Operation in 2026

The practical question is not 'marine or cargo' but 'which interests do I need to insure, and under which policy does each interest sit?' A cargo owner shipping containerised goods on a third-party vessel needs cargo insurance (ICC A with war and strikes extensions) and nothing else — the vessel operator's hull and P&I policies are not your concern and do not protect your goods. A vessel operator carrying third-party cargo needs hull and machinery, P&I, and potentially freight liability if they are also acting as carrier under a bill of lading. A freight forwarder with no vessels needs freight liability and, if they are taking physical custody of goods, a bailee's liability extension.

Open cover arrangements are worth considering if you are a high-frequency shipper or freight forwarder. An open cover is a master policy under which individual shipments are declared as they arise, rather than placing a separate policy for each consignment. The ICC wording, the agreed limits and the premium rate are fixed at the outset; you declare each shipment and receive a certificate of insurance. This is administratively efficient and ensures you are never uninsured because you forgot to place a policy before the goods shipped.

When you approach a specialist broker for a London-market placement in 2026, the quality of your submission determines the quality of your terms. Underwriters are pricing risk, not guessing at it. A well-prepared submission — with accurate commodity descriptions, packing details, vessel age and class, trading routes and claims history — will attract better capacity and clearer policy language than a vague enquiry. Your broker should be challenging the underwriter on exclusions, aggregation limits and survey requirements on your behalf, not simply passing a form across the market.

• Cargo owner on third-party vessel: ICC (A) cargo policy with war and strikes extensions
• Vessel operator carrying third-party cargo: hull and machinery + P&I + freight liability
• Freight forwarder (no vessels): freight forwarder's liability + bailee's liability extension
• High-frequency shipper: open cover with declaration facility
• Multimodal operator: confirm which carriage convention governs each leg before agreeing bill of lading terms

What to Bring to Your Broker When Placing Cover

The Insurance Act 2015 places a duty of fair presentation on you as the assured. This means you must disclose all material information that a prudent underwriter would want to know, in a clear and accessible form. Failure to comply does not just risk a claim being reduced — it can give the underwriter a remedy of avoidance, which means the policy is treated as if it never existed. This is not a technicality; it is the legal framework under which your claim will be assessed.

For a cargo placement, material information includes: the nature and value of the goods, packing method and container type, the voyage or trade route, the carrying vessel's class and age (where known), any prior losses in the last five years, and any special storage or handling requirements. For a hull placement, add: the vessel's class society and survey status, her current trading area, any recent damage history, the management structure and the crew's certificates of competency. For P&I and freight liability, add: your annual freight revenue or tonnage, the number of crew, the flag state and any regulatory notices or port state control deficiencies.

• Cargo: commodity description, packing, voyage, vessel details, sum insured, claims history (5 years)
• Hull: class certificate, survey status, trading area, damage history, management and crew details
• P&I / freight liability: flag state, crew numbers, MLC 2006 compliance status, annual freight revenue, PSC deficiency history
• All lines: named assured, co-assureds (mortgagee, charterer), any existing cover to avoid gaps or overlaps

Frequently asked questions

Do I need both a cargo policy and a hull policy, or does one cover the other?

They cover different interests and neither substitutes for the other. Your hull policy covers the vessel; it does not cover the goods on board. Your cargo policy covers your financial interest in the goods; it does not cover the ship. If you own both the vessel and the cargo, you need both policies. If you are a cargo owner shipping on a third-party vessel, you need cargo insurance only — the vessel operator's hull policy is irrelevant to your goods.

What happens if my cargo is damaged and I only have ICC (C) cover?

ICC (C) covers only major casualties — total loss of the vessel, stranding, sinking, fire, explosion and collision. If your cargo is damaged by, say, water ingress, theft, rough handling or contamination, ICC (C) will not respond. You would need ICC (A) or a specific extension to recover. If you are currently on ICC (C) because it was the cheapest option at placement, speak to your broker about upgrading before your next shipment — the premium difference between ICC (C) and ICC (A) is rarely proportionate to the additional exposure you are carrying.

As a freight forwarder, am I covered by the shipper's cargo insurance if a claim arises?

No. The shipper's cargo policy covers the shipper's interest in the goods. If the shipper's underwriter pays a claim and determines you were the responsible carrier, they will subrogate against you. You need your own freight forwarder's liability policy to cover your legal liability to cargo owners. Do not assume that because the goods are insured, your liability is covered — it is not.

What do I need to provide to get a cargo insurance quote?

At minimum: a description of the commodity and its value, the packing method (palletised, containerised, break-bulk), the trade route or voyage, the carrying vessel's name, flag and class where known, the frequency of shipments if you want an open cover, and your claims history for the past five years. The more accurate your submission, the more precisely the underwriter can price the risk — and the less likely you are to face a dispute at claim stage over a material fact that was not disclosed.

Does my cargo policy cover general average contributions?

Under ICC (A) and ICC (B), yes — your policy will typically respond to a general average contribution you are required to make under the York-Antwerp Rules, provided you have an insurable interest in the cargo at the time of the casualty and your policy is in force. Under ICC (C), general average is also covered for the listed perils. However, you will need to provide a general average guarantee and, usually, a cash deposit or bond before the shipowner releases your cargo. Your broker should be liaising with the average adjuster on your behalf as soon as a general average is declared.

How long does it take to bind a London-market cargo or hull policy?

For a straightforward cargo placement on standard ICC terms with a complete submission, binding can happen within one to three working days. Hull and P&I placements for larger or more complex vessels — older tonnage, non-standard trading areas, vessels with recent damage history — take longer because underwriters may require a survey or additional information before quoting. Open cover facilities for freight forwarders or regular shippers typically take one to two weeks to negotiate and document properly. Starting the process before your current policy expires, not the day before, gives your broker the time to negotiate terms rather than simply accept whatever is available.