A waiver of subrogation is an endorsement on an insurance policy that prevents the insurer from suing a third party to recover money the insurer paid on a claim. In the context of vendor contracts, it means: if the vendor's insurer pays a claim involving your property or operations, the insurer waives its right to turn around and sue you to recover that payment.
Without it, you can find yourself sued by your own vendor's insurance company - after the vendor's policy already paid the claim.
What Subrogation Is
Subrogation is the legal right of an insurer to step into the shoes of its insured and pursue a claim against a third party who caused the loss.
Example without a waiver: Your contractor damages your building. Their GL insurer pays them for the claim. The insurer then investigates and determines that a condition on your property contributed to the loss. The insurer sues you to recover what they paid - using their insured's rights against you.
You've been sued by your contractor's insurance company, even though the contractor's policy paid the claim. This is subrogation in action.
What a Waiver Does
A waiver of subrogation endorsement on the policy prohibits this. The insurer agrees, in advance, not to pursue recovery against specified parties.
When your contract requires a waiver of subrogation, you're requiring the vendor to get their insurer to agree not to come after you if a claim is paid. This closes a significant loop in the risk transfer arrangement.
- Insurer pays claim to vendor
- Insurer investigates your contribution
- Insurer sues you to recover payment
- You defend a subrogation lawsuit
- Insurer pays claim to vendor
- Insurer waives right to pursue you
- Matter ends - no lawsuit against you
- Risk transfer works as intended
Why Contracts Require It
Most well-drafted vendor contracts require waivers of subrogation because:
Both parties are frequently operating in the same workspace: When shared premises, joint work, or interconnected operations are involved, determining fault is complex. Subrogation suits become he-said-she-said litigation.
The parties have agreed to their respective insurance responsibilities: The contract already allocates who is responsible for what. Subrogation suits can undermine that allocation by creating liability that the parties didn't intend.
It's standard practice in construction and commercial real estate: In these industries, waiver of subrogation is a default expectation, not an unusual ask. Most general contractors, property managers, and commercial landlords require it as a matter of course.
How to Verify It's Actually on the Policy
The ACORD 25 has a checkbox for waiver of subrogation. Like the additional insured checkbox, this is informational - it doesn't create the waiver.
The waiver must be an endorsement on the actual policy. Here's how to verify:
Step 1: Check the ACORD 25 waiver of subrogation checkbox and any description of operations language referencing the waiver.
Step 2: For high-value or high-risk relationships, request the actual endorsement form from the vendor's agent. For GL policies, look for an endorsement that specifically waives subrogation in your favor. For workers' comp policies, look for WC 04 03 A (Waiver of Our Right to Recover from Others) or an equivalent form.
Step 3: Verify the endorsement covers the right parties. A blanket waiver endorsement covers anyone you're required by contract to provide a waiver to. A scheduled waiver may only apply to parties listed by name. Confirm your organization is covered.
GL vs. Workers' Comp Waiver of Subrogation
Waivers of subrogation are required on multiple lines, and they work differently:
General Liability Waiver: Prevents the GL insurer from recovering against you after paying a covered claim. Most commonly required in construction, commercial real estate, and service contracts.
Workers' Compensation Waiver: This is more significant. Without a WC waiver, if a vendor's employee is injured on your premises and the WC insurer pays the claim, the insurer can sue you - claiming that your negligence contributed to the injury. A WC waiver of subrogation endorsement prevents this.
The WC waiver is particularly important in construction and any industry where vendor employees work on your property. The WC waiver endorsement (WC 04 03 A) is a specific form - not just a checkbox on the ACORD 25.
Consequences of Not Having It When You Need It
The scenario plays out like this: A vendor employee is injured on your job site. The vendor's workers' comp insurer pays medical costs, lost wages, and other benefits - potentially $200,000 or more for a serious injury. The WC insurer then investigates and finds evidence that a hazard on your premises contributed to the injury. They pursue subrogation against you.
You are now a defendant in a subrogation action, even though the original claim was handled by the vendor's policy. The cost: legal defense, potential settlement, and disruption.
A properly executed WC waiver of subrogation endorsement prevents this entirely. The insurer paid the claim, and that's where the matter ends.
The Verification Standard
For any vendor working on your premises or performing physical work in your operations, verify waiver of subrogation on both GL and WC. Check the ACORD 25, confirm via the description of operations field, and request the endorsement forms for high-risk relationships.
Bramble checks for waiver of subrogation requirements automatically when comparing COIs against your contracts. See how it works.