Stock Throughput Insurance: One Marine Policy From Origin Warehouse to Final Storage

Stock throughput works like this. Your goods are covered continuously from the supplier's warehouse, through every leg of international transit, into your own warehouse or a third-party storage facility, and for as long as they sit there, under a single marine-class policy. Same clause set, same all-risks wording, same insurer.

There's no handoff from a marine cover to a fire policy at the warehouse door. There's no 60-day clock running out on your cargo insurance while you wait to ship the goods onward or sell them. There's no double payment for overlapping coverage on the same drum of palm oil or the same pallet of semiconductors.

That's the structural idea. The commercial consequence is that a certain kind of business pays noticeably less to insure its stock, and gets broader cover, than it would by combining a conventional marine policy with a fire policy extension on the storage side. Whether that business is yours depends on a small number of questions this article will walk through.

The Standard Marine Cover and Where It Stops

A conventional marine cargo policy written on Institute Cargo Clauses (A) 2009 attaches at the origin warehouse and terminates under the transit clause in Clause 8. The termination triggers are specific. Cover ends when the goods are delivered to the final warehouse named in the policy, or to any other warehouse the assured elects to use for storage or allocation, or on expiry of 60 days after completion of discharge from the overseas vessel at the final port of discharge, whichever occurs first.

In practice, that 60-day window gets used up quickly. Containers sit in bonded storage waiting for duty clearance, goods arrive ahead of buyer readiness, and stock accumulates before a scheduled onward shipment.

Once Clause 8 triggers, the marine policy stops responding. Your stock is in the warehouse, and you're relying on whatever is covering that warehouse, which is almost always a fire policy.

The Fire Policy Solution and Its Limits

The conventional answer is to declare stock under a fire insurance policy covering the warehouse. In Malaysia, commercial fire cover has historically been written on tariff rates, with premium calculated on the declared sum insured and the risk classification of the occupancy. Stock is a large component of that sum insured for traders, manufacturers, and distributors, and often the largest single line on the policy.

The fire policy does a real job. It covers the building, the fixtures, and the stock inside against fire, lightning, and usually a handful of named perils added by extension.

It has three structural limits when applied to stock that has only just arrived from an overseas transit:

What Stock Throughput Does Differently

A stock throughput policy is written on marine clauses, not fire clauses. The underwriter is a marine underwriter, the rating is based on marine exposure, and the cover form is all-risks subject to named exclusions, in the same shape as ICC (A) 2009.

The policy does two things at once. It covers the goods in transit from origin to final location, in the usual warehouse-to-warehouse manner. And it continues to cover those same goods while they're in storage at the named location or locations, for a defined storage period, which is commonly up to 12 months.

The transit portion and the storage portion are underwritten together and priced together. You pay one premium for the continuous cover instead of two premiums for two policies that overlap in some places and leave gaps in others.

The Coverage Form

Stock throughput is sold in slightly different forms by different markets, but the core structure is consistent. The transit portion mirrors the Institute Cargo Clauses (A) 2009 all-risks cover, with the standard war and strikes exclusions under Clauses 6 and 7. The storage portion provides all-risks cover for the goods while at the insured location, typically with an extension for transit between named locations as part of the same insured movement.

Common inclusions in the storage portion are fire and allied perils, theft (with caveats around forced entry and named premises), accidental damage, water damage from sprinkler leakage or pipe burst, and vandalism. Exclusions usually mirror marine market practice: inherent vice, ordinary wear and tear, delay, deliberate acts, and anything covered by another policy of more specific description.

The detail varies by insurer and by risk. The point is that the cover is broader than a fire extension and sits under one clause set instead of two.

Declaration-Based Premium

Stock throughput is normally written on a declaration basis rather than a fixed sum insured. You declare your stock values on a monthly basis, typically the average of your opening and closing stock at cost, and premium is calculated on the actual exposure rather than a fixed-assumed peak.

For a seasonal business or one with fluctuating stock levels, this alone can be a meaningful saving. A distributor who holds three months of peak inventory before Chinese New Year and runs lean the rest of the year no longer pays peak-level premium for the nine months of lower exposure.

The declaration discipline isn't optional. Under-declaration is treated as a breach of warranty, and over-declaration means you're paying for cover you didn't need.

Monthly or quarterly returns are the normal cadence, and your broker should help you set the declaration rhythm before the policy incepts.

Who Stock Throughput Fits

Stock throughput isn't for every shipper. The structural requirements are specific enough that a large share of Malaysian businesses that carry stock won't be the right fit.

It tends to fit businesses with three characteristics. They hold material values of stock in storage at any given time, usually at least a seven-figure ringgit sum. Those values sit on goods that have recently been in transit or will soon be in transit, linking the storage exposure to the marine one.

The third characteristic is a defined storage footprint: a named warehouse of their own, or a defined set of third-party warehouses where the storage happens. Businesses that only store a modest amount of stock, that don't import or export, or that rely on a fragmented network of storage locations that can't be named and inspected, will generally find a conventional fire policy is still the practical answer.

Named vs Unnamed Warehouses

The distinction between named and unnamed warehouse locations matters more than most buyers expect. Insurers underwrite named warehouses with specific knowledge of construction, fire protection, security, location, and the associated storage risk. That allows them to commit meaningful capacity, sometimes into the tens of millions of US dollars for a single location.

Unnamed warehouse coverage, where the policy responds to goods at any location chosen by the assured within the territorial limits, is much more restrictive. Capacity tends to be limited to a modest sum per location, because the insurer is effectively underwriting blind. If you want the full benefit of a stock throughput structure, naming your warehouses, and allowing the insurer to survey or review them, is the normal trade.

For businesses using third-party storage, the practical step is to get the warehouse details on the policy: address, occupancy, construction type, fire protection systems, and accumulation. A bit of administrative work up front unlocks significantly higher capacity and often better rates.

Stock Throughput vs a Fire Policy With a Stock Extension

A common question is how stock throughput compares to simply adding a transit extension to a commercial fire policy, or adding a storage extension to a marine policy. The answer depends on where the risk is concentrated and how much movement there is.

The most honest framing is that stock throughput is the better tool for a business whose stock risk is substantially a marine-class risk, which is the case for any business that imports, exports, or moves large volumes of goods between named locations. Fire policies remain the right tool for stock that never moves, and for the physical building itself, which stock throughput does not cover.

What Stock Throughput Does Not Do

Stock throughput is a stock cover, not a property cover. It insures the goods, not the warehouse structure, the fixtures, the plant, the machinery, or the business interruption exposure if the warehouse can't operate.

A business moving its stock to a throughput structure still needs a fire policy, or equivalent property cover, for the building and everything other than the stock. What changes is that the stock line is lifted off the fire policy and placed on the marine-class throughput policy, with the fire sum insured reduced accordingly.

It also doesn't cover war or strikes perils as standard. The same Clause 6 and Clause 7 exclusions apply, and war risk or strikes cover needs to be bought as a standalone extension in the marine market, in the same way it's bought on a conventional marine cargo policy.

Questions to Ask Your Broker Before Placing It

A stock throughput programme is only as good as the declarations, the named locations, the clause wording, and the underwriter. If you're considering moving your stock onto a throughput structure, the following questions are the ones to ask upfront.

Frequently Asked Questions

Is stock throughput cover available in Malaysia?

Yes. Stock throughput is a recognised structure in the marine cargo market, placed in Malaysia through licensed marine brokers and arranged under the marine class of business. As with any insurance placement, the licensed broker and insurer are responsible for making sure the placement complies with local regulatory requirements.

Does it replace my fire insurance?

No. It replaces the stock component of your fire insurance, not the fire policy itself. The building, the fixtures, the plant and machinery, and the business interruption cover all remain on a property policy, while the stock line moves onto the marine throughput policy and the fire sum insured is reduced accordingly.

Can goods in a third-party warehouse be covered?

Yes, subject to the warehouse being named on the policy and accepted by the underwriter. Third-party storage is common and not a barrier. Unnamed third-party warehouse cover is usually available too, but with lower sub-limits.

What happens if we exceed the 12-month storage period on a consignment?

Goods held beyond the storage period fall outside the throughput cover unless the policy is extended. Slow-moving stock needs to be flagged and addressed through an extension, endorsement, or by moving it onto a separate property cover. This is one of the items to clarify during placement.

Who typically arranges stock throughput in Malaysia?

It is placed by marine brokers and marine-focused insurance platforms working with marine underwriters. A property-only broker may not have direct access to the marine market for throughput structures, and a marine-only broker will not write the building fire cover that still needs to sit alongside it. A coordinated placement across both lines is the practical answer.

Does stock throughput cover finished goods only, or also raw materials and work-in-progress?

Commonly all three, but the policy wording needs to specifically include them. Raw materials in a production facility, work-in-progress on the production line, and finished goods in the warehouse can all be declared, but the underwriter needs to understand the mix and price it accordingly. Clarify this during placement.

Voyage Conclusion

Stock throughput closes a structural gap between how marine insurance ends and how property insurance takes over, by refusing to treat the gap as a gap at all. For the right business, it replaces two policies with one, broadens the cover, and sits the risk with the market that understands the exposure.

Voyage places marine cargo and stock throughput structures for traders, importers, and manufacturers in Malaysia and Singapore, working with licensed broking partners and marine underwriters. If your stock is material, moves across borders, and currently sits on a fire policy you suspect is doing more work than it should, this is the conversation to have.

Disclaimer: This article provides general guidance on marine cargo and stock throughput insurance as of April 2026. Coverage terms, conditions, and availability vary by insurer, policy, and jurisdiction. Regulatory requirements differ between countries and may change. Always review your specific policy wording and consult a qualified insurance or legal professional before making coverage decisions.