Industrial Special Risks (ISR) Insurance: A Guide for Australian Mining, Construction and Industrial Operators

For most Australian businesses of any scale, the largest single figure in the insurance program is the property sum insured, and the policy that carries it is an industrial special risks policy. It covers the processing plant, the workshops, the yards, the offices and the stock — and, through its business interruption section, the earnings those assets produce.

It is also a policy whose performance is decided long before a loss: by how the values were declared, how the limit was set, and which sub-limits were accepted at renewal without much discussion. This guide sits within BCS Broking's broader coverage of commercial insurance for Australian construction and mining, and explains how the policy works and where it tends to fall short. A note on roles: cover is provided by APRA-regulated underwriters; BCS arranges and structures it. BCS is the broker, not the risk carrier.

Who is this for?

Finance directors, risk managers and owners of Australian businesses with substantial physical assets — mine and quarry operators with fixed processing plant, construction and civil companies with yards, workshops and precast or batching plants, fabricators and manufacturers supplying construction and resources, and multi-site operators. Underwriters commonly consider ISR from total insured values in the order of $5M to $10M, though appetite varies and the complexity of the operation matters as much as its size.

What is an ISR policy?

An industrial special risks policy is an "all risks" property policy: it covers physical loss, destruction or damage to insured property from any cause that is not specifically excluded. That is a different starting point from many small-business policies, which list the events they cover.

Most ISR policies have two sections:

1. Material damage — physical loss or damage to buildings, plant and machinery, stock, contents and improvements.
2. Business interruption — loss of gross profit and increased costs following insured damage, over a chosen indemnity period. How that section works is set out on the property and business interruption page.

The Australian market developed a standard ISR wording, the Mark IV, introduced in 1987. Today policies are written on Mark IV, modified Mark IV, Mark V and insurers' own wordings. In practice the base form matters less than the endorsements, sub-limits and definitions agreed for the particular risk, which is why two ISR policies with the same name can respond very differently to the same loss.

How does ISR differ from a business pack?

The practical difference is flexibility. An ISR policy can be shaped around how an operation actually works — which site depends on which, where the critical plant sits, which perils are realistic — in a way a pack policy generally cannot.

What does ISR cover, and what does it usually exclude?

Beyond the property itself, ISR policies typically include additional benefits such as removal of debris, professional fees for rebuilding, expediting costs, extra costs to comply with authorities' requirements when rebuilding, temporary removal of property and automatic cover for newly acquired property up to a limit. Each is usually subject to its own sub-limit.

Common exclusions and restrictions, with how they are usually addressed:

Knowing which policy picks up each excluded item is as important as the exclusion itself. A gap rarely comes from one policy failing; it comes from an asset that no policy was arranged to cover.

How do declared values and the limit of liability work?

These are the two numbers that decide how much an ISR policy pays, and they do different jobs.

Declared values state what each location's property would cost to reinstate — to rebuild or replace as new, without deduction for depreciation. They are used to rate the premium and, in many wordings, to test for underinsurance. If declared values are materially lower than true reinstatement cost, a claim can be reduced in proportion to the shortfall. The exact mechanism varies between wordings.

The limit of liability is the most the insurer will pay for any one loss. For a multi-site business it is often set below total declared values, because a single event is unlikely to destroy every site. That is a legitimate way to buy cover efficiently, provided the limit is tested against a realistic worst-case loss at the largest or most concentrated site, including business interruption.

Two pressures make this harder than it sounds. Construction and equipment costs have risen faster than many declared values have been updated, and reinstatement cost includes demolition, debris removal, professional fees and compliance upgrades that a book value or insurance-to-value estimate can miss. Periodic professional valuations, indexed between valuations, are the usual discipline.

A representative scenario: an industrial operator found on valuation that the reinstatement cost of its main processing building and plant was well above the figure declared, which had been indexed from an older valuation. Correcting it before renewal increased the premium modestly and removed a material underinsurance exposure. This is a representative composite, not a specific client outcome.

How are natural catastrophe risks handled?

Flood, cyclone, bushfire, storm and earthquake are usually addressed through specific sub-limits and deductibles rather than the main limit. For regional mining and construction sites — particularly in cyclone-exposed parts of Queensland, Western Australia and the Northern Territory, or near floodplains — these terms can matter more than the headline limit.

The wording's definitions decide what is covered. Whether flood is included, how it is defined, and the sub-limit and deductible that apply are worth reviewing location by location rather than across the whole schedule.

Why does machinery breakdown sit in a separate section?

Because the material damage section generally excludes it. Damage caused by an external event — fire, impact, storm — is covered; an internal mechanical or electrical failure of the machine itself usually is not.

For a business that depends on fixed plant — crushers, mills, conveyors, kilns, compressors, transformers and switchboards — that exclusion is significant. A machinery breakdown section covers the repair or replacement, and machinery breakdown interruption cover addresses the loss of profit while the plant is down. Spare-parts availability and lead times are central to how the indemnity period for that cover is set.

How does ISR fit with the rest of the program?

For a mining operator, the way these fit together — and how open-cut and underground operations differ — is covered in mine site insurance: open-cut vs underground.

What do underwriters look at?

ISR underwriting is driven by the physical risk and the quality of the information presented. Underwriters typically assess:

• Construction — building materials, including combustible insulated panels and cladding
• Fire protection — sprinklers, detection, hydrants, water supply and separation between buildings
• Housekeeping and hot work controls — particularly in workshops and fabrication areas
• Maintenance regimes — for critical plant and electrical infrastructure
• Natural hazard exposure — flood, cyclone and bushfire by location
• Values — the age and basis of the valuations behind the declared values
• Loss history — frequency and severity of past claims
• Interdependency — single points of failure that would halt the business

Risk engineering surveys are common at this scale, and acting on their recommendations tends to influence terms at the next renewal. Larger risks are often placed across several underwriters, with capacity sensitive to global reinsurance conditions.

A checklist before renewal

1. Confirm when each location was last professionally valued, and whether values have been indexed since.
2. Check that declared values reflect full reinstatement cost, including demolition, debris removal, fees and compliance upgrades.
3. Test the limit of liability against a realistic worst-case loss at the largest site, including business interruption.
4. Review flood, storm, cyclone and bushfire sub-limits and deductibles location by location.
5. Confirm machinery breakdown and machinery breakdown interruption cover for critical plant.
6. Map assets the ISR excludes — works under construction, mobile plant, goods in transit, underground property — to the policies that cover them.
7. Close out risk survey recommendations, or record why they were not adopted.

FAQ

What is ISR insurance?

Industrial special risks insurance is an all-risks property policy for businesses with substantial or complex assets. It covers physical loss or damage to buildings, plant, stock and equipment, usually on a reinstatement basis, and generally includes a business interruption section.

What does ISR stand for in insurance?

Industrial special risks. The name reflects its origins as cover for industrial and commercial property too large or complex for standard business policies.

Who needs an ISR policy?

Businesses with substantial property values or complex operations — commonly from total insured values in the order of $5M to $10M, though underwriters' appetite varies. Mine and quarry operators, manufacturers, fabricators and construction companies with significant yards and plant are typical buyers.

What is the difference between ISR and a business pack?

A business pack is a largely standard policy for smaller businesses, often listing the events it covers. ISR is a negotiated all-risks policy that can cover multiple sites under one limit, with sub-limits and endorsements tailored to the operation.

What is an ISR Mark IV wording?

The Mark IV is a standard Australian ISR wording introduced in 1987. Many policies are now written on modified Mark IV, Mark V or insurers' own wordings, and the agreed endorsements often matter more than the base form.

Does ISR include business interruption?

Usually, as a separate section with its own sum insured and indemnity period. It is not automatic, and the business interruption section needs to be set up on its own terms.

Does ISR cover machinery breakdown?

Generally not under the material damage section, which excludes internal mechanical and electrical breakdown. Machinery breakdown is covered by a separate section or policy, with interruption cover available alongside it.

Does ISR cover mobile plant and vehicles?

Usually not. Mobile plant is generally insured under a plant and equipment policy, and registered vehicles under a motor fleet policy.

Where to next

This article sits within BCS Broking's broader commercial insurance for Australian construction and mining coverage. To go deeper:

• Property and business interruption sets out how BCS structures property programs
• Mining and resources insurance covers the wider mining program
• Mine site insurance: open-cut vs underground covers how ISR fits a mine program
• Contractors plant and equipment insurance covers the mobile plant ISR excludes
• Contract works insurance in Australia covers property under construction

For background reading, the Australian and New Zealand Institute of Insurance and Finance publishes industry commentary on property cover through its journal, Covered, and business.gov.au summarises the main types of business insurance.

If you would like your declared values, limit and sub-limits reviewed before renewal, contact BCS Broking. BCS acts as a specialist broker and negotiates across the market as the client's dedicated advocate.

This information is general in nature and does not consider any specific objectives, financial situation or needs. Consider whether the information is appropriate before acting on it. Policy terms vary between underwriters — what a specific program covers is determined by its wording. Cover is provided by APRA-regulated underwriters; BCS Broking Pty Ltd is an authorised insurance broker and arranges and structures the cover (AFSL details on the Financial Services Guide).