Additional Insured

An additional insured is a person or organisation not automatically included under an insurance policy but added through an endorsement, granting them specific rights and coverage under the policyholder's insurance agreement.

What you need to know

Adding an additional insured to an insurance policy extends liability protection to third parties such as contractors, landlords, or business partners. This endorsement protects both the primary policyholder and the additional party from claims arising from shared operations or contractual relationships.
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What you'll learn

Clear explanation of endorsement processes and risk evaluation requirements

Coverage scope for defence costs, lawsuits, injuries, and property damage

Understanding of premium adjustments based on extended risk exposure

Vendor protection for products liability and completed operations

Subcontractor coverage requirements for construction and property projects

Landlord-tenant coverage protecting property owners from occupancy claims

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An additional insured is a person or organisation not automatically covered under an insurance policy but who has been added to the policy through a formal endorsement. This endorsement grants them specific rights and liability coverage under the primary policyholder's insurance agreement. The additional insured status is commonly required in business contracts, construction projects, and commercial leasing arrangements to ensure all parties have appropriate protection.

The process of adding an additional insured requires a policy endorsement that formally amends the insurance contract. The insurer typically evaluates the risk associated with extending coverage to the new party, which may involve reviewing the nature of the relationship, the scope of activities involved, and the potential liability exposure. This endorsement is not automatic and must be specifically requested and approved by the insurance company.

Coverage for additional insureds is typically limited to liability arising from the primary insured's actions or operations. Under a general liability insurance policy, this usually includes defence costs, lawsuits, bodily injuries, property damage, and advertising injuries that stem from the named insured's work or activities connected to the additional insured. Importantly, the coverage does not extend to all operations or activities of the additional insured—only those directly related to the primary policyholder's work.

Common scenarios for additional insured endorsements include construction projects where subcontractors add general contractors and property owners to their policies, commercial leases where tenants add landlords to their liability coverage, vendor relationships where companies extend coverage to suppliers, and franchise agreements where franchisees add franchisors. Each arrangement protects against claims arising from the specific business relationship while managing risk exposure for all parties.

Adding an additional insured typically affects the insurance premium, as it alters the risk profile for the insurer. The cost adjustment depends on factors such as the nature of the additional insured's involvement, the scope of coverage extended, and the overall liability exposure. Understanding these implications is essential for businesses managing their insurance costs whilst meeting contractual obligations and maintaining adequate protection for all parties involved in their operations.

Need Better Insurance Protection?

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Meet the author

See the author who wrote this article

Louie Reid is the Head of Outreach at Gerrard's Insurance and a third-year Economics and International Business student at the University of Canterbury, based in Christchurch, New Zealand.
Louie Reid
Currently studying Economics and International Business at the University of Canterbury (Third Year)

Head of Outreach at Gerrard's Insurance, connecting commercial business directors with experienced brokers to secure better insurance outcomes.

Gerrards Insurance Brokers Ltd
Licensed since: 2025

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