Additional Insured and Waiver of Subrogation: The Insurance Traps

Construction insurance provisions typically require the subcontractor to add the general contractor and owner as additional insureds on its liability policies, to make that coverage primary and non-contributory (so the sub's policy pays first, before the upstream parties' own coverage), and to waive subrogation against the upstream parties (so the sub's insurer cannot later pursue them). Each of these is a distinct obligation that must be backed by an actual policy endorsement, not just a promise in the contract.

Required limits — per occurrence, aggregate, and umbrella or excess — must also be within, or supported by, the subcontractor's program. The contract language and the insurance policy have to line up, or the sub has promised something its insurance does not deliver.

A requirement for higher limits than the sub carries means the difference is effectively self-insured: if a loss exceeds the policy limit, the contractor funds the gap itself. A demand for completed-operations additional-insured coverage — protection for claims arising after the work is finished — that the sub's endorsement does not include leaves a gap that surfaces years later, after the project is done and the defect or injury claim arrives.

Open-ended language is its own trap. A clause requiring 'such insurance as the Contractor may from time to time require' gives the upstream party a unilateral right to escalate the sub's coverage obligations after signing, with no defined limit the sub can price or plan for.

Additional-insured requirements do not exist in a vacuum. Several states — including Arizona, Colorado, Georgia, Kansas, Montana, and Oregon — have anti-indemnity statutes that void additional-insured coverage for the upstream party's sole negligence, just as they void the corresponding indemnity. So a contractor relying on additional-insured status as the real risk transfer may find that, in those states, the coverage it bargained for is legislated away to the same extent the indemnity is.

This is why the insurance and indemnity articles have to be reviewed together. They are two halves of the same risk-transfer mechanism, and a statute that limits one often limits the other.

Insurance is one of the few contract risks that can be verified objectively before signing. Route every insurance article to a broker for confirmation that the program can deliver exactly what is required — the additional-insured endorsement and its completed-operations scope, the primary/non-contributory wording, the waiver of subrogation, and the specific limits. A certificate of insurance is not the same as the endorsement; the actual policy language controls.

Where the program cannot meet a requirement, the choice is to obtain the endorsement, negotiate the requirement down to what the program supports, or knowingly accept and price the gap — but that should be a deliberate decision, not a surprise discovered after a loss.

Compare required limits to the program; confirm additional-insured endorsements include completed operations and match the required primary/non-contributory and waiver-of-subrogation terms; flag any open-ended 'as required' language; and read the insurance article alongside the indemnity clause and the governing-law clause, because anti-indemnity statutes can reshape both. Insurance promises the contract cannot back with real coverage are uninsured liabilities wearing an insurance label.