Category: Engineering specialty · Reviewed by Tim Roche, Director · PI & Commercial · Last reviewed 2026-06-05
Engineering insurance is the specialty class of UK commercial insurance covering machinery breakdown, computer breakdown, boiler and pressure vessel inspection, lift inspection, electrical inspection, electronic equipment exposures and related engineering risks; it has its origins in 19th-century industrial boiler inspection societies and remains structurally distinct from general property insurance.
Category: Engineering specialty Also known as: engineering lines, machinery insurance class First codified: Manchester Steam Users’ Association (1855); UK statutory inspection regime from 19th century onwards Related legislation: Pressure Systems Safety Regulations 2000 [1]; Lifting Operations and Lifting Equipment Regulations 1998 (LOLER) [2]; Electricity at Work Regulations 1989 [3]; Health and Safety at Work etc. Act 1974 [4]
Engineering insurance is the historical UK insurance class that combines first-party indemnity cover for machinery and electrical breakdown with the statutory inspection services required for boilers, pressure vessels, lifting equipment and electrical installations. The class has its origins in the 19th-century industrial revolution: the Manchester Steam Users’ Association was founded in 1855 to provide both inspection and insurance for industrial boilers in response to a series of catastrophic boiler explosions, establishing the integrated ‘inspect and insure’ model that continues to characterise the modern engineering insurance market [5][6].
The principal sub-classes of modern engineering insurance are [5][6]:
Machinery breakdown insurance: first-party indemnity for sudden and accidental mechanical, electrical or electronic breakdown of plant and machinery, including consequent business interruption under loss of profits following machinery breakdown.
Computer breakdown insurance: first-party cover for sudden and accidental breakdown of computer equipment, including loss of data and computer downtime.
Boiler and pressure vessel inspection and associated insurance for sudden and accidental damage from explosion or collapse.
Lift inspection LOLER and associated insurance for lift mechanism breakdown and consequential loss.
Electrical inspection and associated insurance for electrical installation breakdown.
Electronic equipment insurance: cover for sudden and accidental damage to electronic equipment, often broader than the basic computer breakdown cover.
Frozen food deterioration insurance: cover for spoilage of frozen goods following refrigeration breakdown.
Combined engineering insurance: integrated cover combining several engineering sub-classes for a single insured.
The UK engineering insurance market is dominated by a small number of large specialist insurers (Allianz Engineering, Zurich Engineering, RSA Engineering, HSB and Aviva), reflecting the specialist nature of the inspection function and the integrated product model. Lloyd’s syndicates participate to a more limited extent, principally for larger commercial and industrial placements [5][6].
The UK statutory inspection regime for engineering plant is contained in several principal instruments. The Pressure Systems Safety Regulations 2000 require operators of pressure systems (boilers, pressure vessels, pressurised pipework) to ensure that the system is properly designed, properly installed, properly maintained and periodically inspected by a competent person according to a written scheme of examination. The HSE is the principal regulator [1][7].
The Lifting Operations and Lifting Equipment Regulations 1998 (LOLER) require operators of lifting equipment (lifts, cranes, hoists, lifting accessories) to ensure that the equipment is strong, stable, suitable for use, properly installed, properly maintained and periodically inspected by a competent person. Inspection intervals are typically 6 months for passenger-carrying lifts and 12 months for goods-only lifts and other lifting equipment [2][7].
The Electricity at Work Regulations 1989 require employers to ensure that electrical systems are designed, installed, maintained and used so as to prevent danger. The Regulations do not mandate a specific inspection regime but the practical effect is that periodic electrical installation inspection (typically every 1–5 years depending on installation type) is the industry standard, with engineering insurers providing the inspection service alongside electrical breakdown insurance [3][7].
The ‘competent person’ role under all three Regulations is the foundation of the engineering insurance market. The competent person — typically an engineer employed by the engineering insurance company — carries out the periodic inspection, issues the required certificate, and (in the integrated ‘inspect and insure’ model) is the same party that insures the equipment. The arrangement creates valuable alignment of incentives between the inspector, the insurer and the operator [5][6].
The Health and Safety at Work etc. Act 1974 and supporting regulations apply across the engineering insurance landscape, with the HSE as the principal regulator for inspection-regulated equipment. The Insurance Act 2015 governs the duty of fair presentation and warranty rules for engineering insurance placements [4][8].
A UK commercial or industrial customer with engineering plant on its premises typically arranges engineering insurance alongside the inspection regime as a combined product. The insurer’s engineering surveyor visits the premises to inspect the plant against the relevant statutory requirements (PSSR for pressure systems, LOLER for lifting equipment, statutory electrical inspection for electrical installations) and issues the required certificate. The insurance cover responds for the consequential damage that may arise from sudden and accidental breakdown of the equipment [5][6].
Premium for engineering insurance is typically expressed as a flat annual sum based on the schedule of equipment covered. The premium includes both the inspection service (which is the major component for small installations) and the insurance cover. For larger industrial installations, the inspection and insurance elements may be unbundled with separate fees for each [5][6].
Claims handling involves the engineering surveyor in the role of both inspector and loss adjuster. The same engineer who carried out the most recent inspection may be involved in investigating the cause of the subsequent breakdown — a structure that delivers efficient claims handling but requires careful management of any conflict between the inspection and claims roles [5][6].
The integrated ‘inspect and insure’ model gives engineering insurers a substantial information advantage over general property insurers in respect of the equipment covered. The accumulated inspection data informs underwriting decisions, drives premium calibration and supports risk improvement recommendations to insureds. The model is unusual in commercial insurance and is one of the reasons the engineering market is concentrated in a small number of specialist insurers [5][6].
The principal sub-classes are listed above with dedicated entries. The combination of sub-classes for a single insured is typically arranged through combined engineering insurance, which packages the inspection and breakdown covers for the insured’s various engineering plant into a single policy.
Industrial all risks (IAR) policies — a class outside the strict engineering market — often include engineering perils alongside property all risks cover, providing an alternative to standalone engineering insurance for major industrial operations.
Engineering project insurance for new plant installations is typically arranged under Erection All Risks wordings rather than under operational engineering insurance.
International engineering insurance for UK-headquartered multinationals is increasingly arranged as a global programme with local engineering insurance certificates issued in each jurisdiction.
Specific equipment classes (commercial refrigeration, hospital equipment, food production equipment, paper machinery, printing equipment) often have dedicated engineering insurance products and specialist surveyors.
A UK manufacturing company operates a factory with substantial engineering plant including two steam boilers, a pressurised steam system, six factory lifts, an extensive electrical installation, several large CNC machine tools, IT and communication equipment and refrigerated storage for finished goods. The company arranges combined engineering insurance with a major UK engineering insurer, with the surveyor visiting the premises quarterly to carry out the statutory inspections (PSSR for boilers and pressure systems; LOLER for lifts; electrical inspection on a 3-year cycle) and providing breakdown insurance for the various equipment classes. Annual premium for the combined inspection and insurance is approximately £22,000. During the policy year, a machine tool breakdown results in a 3-week production interruption; the machinery breakdown cover responds for the repair cost (approximately £85,000) and the associated business interruption cover responds for the lost production. Figures in this example are illustrative.
This entry is part of the Apex Insurance Wiki. Last reviewed by Matt Bartlett on 2026-06-05. Next review: 2026-12-05.
Apex Insurance Brokers Limited. Authorised and regulated by the Financial Conduct Authority, FRN 724952. Registered in England and Wales, Companies House 07014570. This entry provides general information about UK insurance concepts and is not regulated advice. Consult your insurance broker on your specific position.
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