Waiver of Subrogation, Explained in Plain English

Subrogation is an insurance company's right to pay its policyholder's claim and then sue whoever caused the loss to get its money back. A waiver of subrogation is a promise not to do that. When your lease or subcontract requires one, it's saying: if your insurer pays your claim, your insurer doesn't then get to come after me for it.

That's the whole concept. The reason it deserves a page is that the mechanics — who waives, in which documents, verified how — are where it actually protects you or silently doesn't.

Why the waiver exists

Picture the loss without one. A fire starts in a tenant's space and damages the building. The landlord's property insurer pays the landlord — as it should; that's what the premiums bought. Then the insurer, standing in the landlord's shoes, sues the tenant for causing the fire. Now the two parties to the lease are in litigation neither of them chose, the tenant's insurer is dragged in, and the commercial relationship is collateral damage. Multiply by every tenant, vendor, and sub a property or project touches.

The waiver's logic: each party insures its own stuff, each party's insurer eats its own claims, and losses stop ricocheting between the parties' carriers. Courts and standard forms (most commercial leases; AIA construction documents) have long blessed mutual waivers for exactly this reason — it's the deal that keeps insured losses where the premiums put them.

The two-document rule

Here's the part that verification hinges on. A waiver of subrogation lives in two places, and needs both:

1. The contract — the lease or subcontract clause where the parties waive claims against each other to the extent insurance covers the loss.
2. The policy — an endorsement (CG 24 04 is the standard GL form; workers' comp has its own, e.g. WC 00 03 13) in which the insurer agrees to honor that waiver.

The contract clause without the policy endorsement is a promise the insurance may not keep — some policies void coverage when the insured impairs the carrier's recovery rights, though most modern forms permit pre-loss waivers made in a written contract. The endorsement without the contract clause often never triggers, since blanket waiver endorsements typically apply only "where required by written contract." So the verification question is always both: is it in the contract, and is the endorsement attached to the certificate? A "Y" in the ACORD 25's SUBR WVD column is the agent's claim; the attached form is the proof — same rule as every endorsement.

Where it shows up

Commercial leases: usually mutual — landlord and tenant each waive, each causes their property insurer to waive. This pairs with the lease's insurance allocation: tenant insures its improvements and contents, landlord insures the building, waivers keep each loss on its assigned policy.

Construction: owners and GCs require waivers from subs on GL and workers' comp — comp being the one people forget, and the one that matters most, since injured-worker claims are the most common construction loss. Without the comp waiver, the sub's comp carrier pays the injured worker and then subrogates against the GC or owner whose site "caused" the injury.

Vendors and service contracts: same pattern as construction, scaled to risk tier.

FAQ

Is a waiver of subrogation good or bad for me? As the party requiring it from vendors/tenants/subs: good — it stops their carriers from recovering paid claims out of your pocket. As the party granting it: it's a standard, priced ask (comp waivers often add a small premium); your carrier pays your covered losses either way.

Does a waiver of subrogation cost anything? GL waivers are commonly included or nominal; workers' comp waivers typically carry a small premium charge (often a percentage of the premium tied to that job). Vendors will pass it through; it's a normal cost of doing commercial work.

Does the waiver apply to deductibles and uninsured losses? Depends entirely on the contract wording. Most well-drafted clauses waive only to the extent of insurance proceeds — losses below deductibles or above limits can usually still be pursued. Read the clause; ask your attorney.

How do I verify a vendor actually has one? The endorsement attached to the certificate — CG 24 04 or equivalent for GL, the comp waiver form for workers' comp — plus the requirement written in your contract so blanket forms trigger. The SUBR WVD "Y" alone verifies nothing.

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Waiver endorsements are one of the four things Travis checks on every certificate, against your actual contract. Run a few through Tightrope's free plan and see which "Y"s have forms behind them.