Marine Cargo Insurance: What It Costs and Why You Need It

Around one percent. That's the standard cost of insuring a sea shipment — roughly NZ$100 on NZ$10,000 of goods. Now weigh that against the alternative: a container lost overboard in a Tasman storm, a warehouse fire at a consolidation depot, a forklift through your cartons at the port — and your entire order, deposit, balance payment and freight, gone with no recourse worth having. Marine cargo insurance is the cheapest line on your landed-cost sheet and the one beginners most often delete to "save money."

Let's fix that.

What can actually go wrong

Modern container shipping is impressively safe, but "rare" multiplied across a 9,000-kilometre journey and half a dozen handling points is not "never":

• Containers lost overboard. It happens every year in heavy weather, and deck-stowed containers on the Pacific run are exposed.
• Water damage. Condensation ("container rain"), leaking seals, and storm ingress ruin cartons and electronics.
• Handling damage. Your goods are craned, trucked and forklifted multiple times between the factory floor and your door — more times still if you ship LCL through consolidation depots.
• Theft and loss. Cargo goes missing from depots and wharves everywhere in the world.
• General average. The scenario nobody warns you about: if the ship suffers a casualty and cargo is sacrificed or salvage costs incurred, maritime law shares the bill among all cargo owners on the vessel. Uninsured, you must post security — real money — before your goods are released, even if they're untouched. Insured, your insurer handles it.

Here's the kicker: the carrier's liability to you is heavily limited by international convention, often to trivial amounts per package. Without your own policy, "the shipping line will sort it out" is a fantasy.

What it costs and what you get

The standard benchmark is about 1% of the value of the goods — the figure we use in every landed-cost example, and small enough that it should be an automatic line, never a decision. Exact premiums vary with product type, packing, route and the insured value basis (commonly cost + freight + a margin), but for planning purposes, 1% serves.

For that you want "all risks" (Institute Cargo Clauses A-level) cover — the broadest standard form, covering physical loss or damage from external causes door to door, including general average contributions. The cheaper restricted clauses (B and C) cover a narrow list of named perils and are rarely worth the saving for containerised consumer goods.

What no policy covers: inherent vice (goods that spoil by their own nature), loss caused by inadequate packing, ordinary leakage or wear, and — importantly — defective goods. Insurance protects against transit misfortune, not a factory that shipped rubbish. That's what your pre-shipment inspection and your unpaid 70% balance are for. The two systems protect different risks; you need both.

How to buy it

You have three practical routes:

1. Through your freight forwarder. The easiest path for a first shipment — most NZ forwarders arrange cover per shipment when asked. Ask for the certificate and check the insured value and clauses.
2. Through an NZ insurance broker. Once you're shipping regularly, an annual open cargo policy covers every shipment automatically at better rates, and removes the risk of forgetting to arrange cover on shipment number seven.
3. From the supplier, under CIF terms. If you buy CIF, the supplier arranges insurance — but it's typically minimum-level cover, chosen for cheapness, with any claim handled through a foreign insurer. We buy FOB and arrange our own insurance precisely to control this.

Whichever route, sort the cover before the goods leave the factory, and insure the full exposure: goods value plus freight, ideally plus a margin for the costs of replacing them.

If you ever need to claim

Claims live or die on documentation and speed. Note visible damage on the delivery docket before signing, photograph everything before and during unpacking, keep the damaged goods and packaging until the insurer says otherwise, and notify your insurer immediately — policies carry tight notification windows. This is one more reason the disciplined habit of photographing your goods at loading (via your inspection) and at arrival pays off: you can prove the damage happened in transit.

One percent. Every shipment. No exceptions — that's the whole policy on policies.

Key takeaways

• Marine cargo insurance costs about 1% of goods value — budget it into every landed-cost calculation as an automatic line.
• Carrier liability is capped at trivial levels; without your own policy you carry the transit risk, including general average contributions.
• Buy "all risks" cover, insure goods plus freight, and arrange it before the goods leave the factory — under FOB terms, that's your job, not the supplier's.
• Insurance covers transit misfortune, not factory defects — it complements, never replaces, your pre-shipment inspection.

Related: Your Container Has Landed: Receiving Goods and the First 48 Hours, Incoterms for NZ Importers: EXW, FOB, CIF and DDP in Plain English

Figure: The ~1% premium against the uninsured downside on a NZ$10,000 shipment.