Endorsement

Waiver of Subrogation

Q: What is the difference between Waiver of Subrogation and Additional Insured?

Two different protections for two different scenarios. Additional Insured extends YOUR policy's coverage to a third party — so when a claim arises from your work, both you AND they get defense + indemnity from your carrier. Waiver of Subrogation prevents your carrier from later suing that same third party (under contribution / negligence theories) to recover what they paid on your claim. The two together prevent both gaps: AI gives the third party coverage they wouldn't otherwise have, and WOS prevents them from being sued by your carrier after the fact. Most sophisticated commercial contracts require BOTH plus primary-and-non-contributory — the risk-transfer trifecta.

Q: Does Waiver of Subrogation cost extra on my policy?

Usually no — most national carriers include blanket WOS at no additional premium on GL when required by written contract. The standard form is ISO CG 24 04 (Waiver of Transfer of Rights of Recovery Against Others to Us). WC WOS (WC 00 03 13) typically costs 2-3% of WC manual premium when added as named-WOS, or is free on a blanket basis. Specific named WOS endorsements typically cost $50-$250/year. Verify with your broker BEFORE signing a contract that requires WOS — some specialty carriers + E&S markets charge for blanket WOS or won't issue it at all.

Q: What policy types should Waiver of Subrogation be on?

Most commercial subcontracts require WOS on three policies: (1) General Liability (typically ISO CG 24 04 blanket form, covers third-party bodily injury + property damage). (2) Commercial Auto (covers driving exposures). (3) Workers Comp (WC 00 03 13 — protects the GC + project owner from your carrier seeking recovery for employee injuries). High-stakes commercial leases also require WOS on the tenant's Commercial Property policy (manuscripted endorsement). Some contracts also require WOS on Umbrella / Excess — typically "follows form" from the underlying GL. Read your contract carefully + verify each policy has the correct endorsement issued by the carrier BEFORE signing.

Q: Can my insurance carrier refuse to provide a Waiver of Subrogation?

Yes — but it's rare with standard markets. Most national carriers (Hartford, Travelers, Hanover, Chubb, Nationwide) routinely provide blanket WOS endorsements when required by written contract. E&S markets, specialty carriers, and small/regional carriers MAY refuse — particularly on high-hazard classes, claims-heavy accounts, or specific named WOS for entities outside the named-insured relationship. If your carrier refuses + your contract requires WOS, options: (1) shop the policy with a broker who has access to WOS-friendly markets; (2) pay for a specific named-WOS endorsement; (3) renegotiate the WOS scope with the contract counterparty. Refusing to provide WOS when required = breach of contract + potential loss of the commercial relationship.

Q: Does Waiver of Subrogation affect my claims handling?

Not for the initial claim payment. Your carrier will defend + indemnify the same way whether or not WOS is in place. Where WOS matters is AFTER the claim is paid — your carrier's subrogation department won't open a recovery file against the named third party. The trade-off: your carrier may apply a small premium credit reflecting reduced recovery potential, OR may simply absorb the reduced recovery cost into base rates. Your carrier will still pursue OTHER responsible parties (the adhesive manufacturer, the equipment vendor, etc.) — the WOS only blocks recovery against the specific contractual counterparty named in the endorsement.

By Jason Wootton · Edited by Justin Marks · Reviewed by Jason Wootton, NPN 7694718 Verify NPN ↗ · See disclosures ↓

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Definition. Waiver of Subrogation prevents your insurer from suing a third party (typically a landlord or contracting partner) to recover what they paid out on your claim.

Also known as: WOS, Subrogation Waiver, Waiver of Transfer of Rights of Recovery

A Waiver of Subrogation (WOS) is a policy endorsement in which your insurance carrier agrees in advance NOT to pursue its right of subrogation against a specific third party named in your contract — typically a landlord, prime contractor, project owner, lender, or vendor. Subrogation is your carrier's contractual right (after paying YOUR claim) to step into your shoes + sue the responsible third party to recover the payout. A WOS endorsement contractually surrenders that right.

Why landlords + GCs demand it: Without a WOS, after your GL carrier pays your $300K customer-injury claim, they can turn around + sue the landlord under a negligent-maintenance theory + recover that $300K. The landlord ends up funding the loss anyway — just through their own carrier. With a WOS in place, that recovery path is blocked. Landlords therefore demand WOS in nearly every commercial lease, and prime contractors demand WOS in nearly every subcontract.

WOS is typically paired with Additional Insured + Primary-and-Non-Contributory in the standard "risk-transfer trifecta" required by sophisticated landlords + GCs. The most common WOS forms on ISO liability policies are: CG 24 04 (Waiver of Transfer of Rights of Recovery Against Others to Us) — blanket version for contractors when required by written contract. WC policies use WC 00 03 13 (Waiver of Our Right to Recover from Others). Property policies typically use a manuscripted endorsement. Standard-form WOS endorsements are typically free with most national carriers when required by written contract; specific named WOS endorsements typically cost $50-$250/year.

Real-world scenario

Priya is a hypothetical small-business owner; her scenario illustrates how a Waiver of Subrogation pairs with Additional Insured in a typical subcontractor agreement. It is not based on a specific real customer, claim, or quote from any carrier.

Priya, commercial flooring subcontractor — Denver, CO (hypothetical). 7-person crew, ~$1.1M annual revenue, primarily commercial-building hardwood + LVT installs. She subcontracts for two general contractors who collectively send her 80% of her work. Each subcontract requires: (1) $1,000,000 / $2,000,000 GL with the GC + project owner listed as Additional Insured with primary-and-non-contributory language; (2) $1,000,000 Commercial Auto with WOS; (3) $500,000 Workers Comp with WOS; and (4) Waiver of Subrogation in favor of the GC + project owner across all three policies.

Annual premium impact for the trifecta on her policies: GL base $2,200 + blanket AI included + blanket WOS (CG 24 04) included = $2,200 GL. Auto base $1,650 + WOS included = $1,650. WC base $4,400 + WC 00 03 13 WOS at $185/year = $4,585. Total: $8,435 annual with the full risk-transfer trifecta included.

Six months into a hotel-renovation project at a $4.2M boutique hotel, Priya's crew misuses an industrial adhesive remover near an HVAC return. Fumes accumulate overnight + sicken a hotel guest in the adjacent open wing, requiring $84,000 in hospital care + a $250,000 settlement demand. The guest sues: (1) the hotel (project owner), (2) the GC, (3) Priya's company, + (4) the adhesive manufacturer. Priya's $1M GL responds: $63,000 settlement on her direct exposure + $42,000 in defense costs for the GC as AI + $36,000 in defense costs for the hotel as AI = $141,000 paid by her GL carrier. Without the Waiver of Subrogation, her GL carrier could then sue the hotel for inadequate ventilation OR sue the GC for inadequate project supervision to recover the $141,000. The WOS endorsement (CG 24 04) blocks both of those recovery paths in advance — the hotel + GC are protected from being financially harmed by Priya's own carrier even though they were named on her certificate.

Eighteen months later, the adhesive manufacturer files a contribution claim against Priya for $48,000 alleging her crew misapplied the product contrary to label instructions. Priya's GL responds with $19,200 in defense + a $9,500 contribution payment. Annual lesson value: the $185 WC WOS endorsement + free GL/Auto WOS endorsements protected the GC + hotel + Priya from a chain of carrier-vs-carrier recovery suits that would have damaged the business relationships she depends on for 80% of her revenue. Total carrier exposure across all incidents: $169,700 — all within limits, all preserved relationships intact.

How it affects your premium

WOS endorsement premium impact is small in absolute dollars but the strategic value is large. Key drivers:

Blanket WOS (CG 24 04 on GL, WC 00 03 13 on WC) — typically included at NO additional premium with most national carriers (Hartford, Travelers, Hanover, Chubb, Nationwide) when required by written contract. Saves $50-$250/year vs specific named WOS endorsements.
Specific named WOS endorsements — typically $50-$250/year per entity. Required when contract counterparty's entity name doesn't fit the blanket form's description (sole-purpose entities, JV partners, etc.).
WC Waiver of Subrogation — WC 00 03 13 (the standard WC WOS) typically costs 2-3% of WC manual premium when added as named-WOS, or is free on a blanket basis. On a $6,000 WC policy, a named WOS runs $120-$180/year. Required by most prime contractors.
Manuscripted WOS on Commercial Property — landlords often require WOS on the tenant's property policy as well. Cost: typically free on a blanket basis, $75-$200 named.
Strict WOS language in lease / contract — some sophisticated landlords require "Waiver of Subrogation in favor of [Owner], [Landlord], [Property Manager], [Lender], and their successors and assigns". Carriers can typically handle these via blanket form, but verify the endorsement language matches the contract requirement before signing.
WOS on Umbrella / Excess — typically follows the underlying GL/Auto/WC. Umbrella policies rely on "follows form" logic — if your underlying GL has blanket WOS, the umbrella generally inherits it. Verify with a specific policy review for high-stakes projects.
Bidirectional WOS — some contracts require WOS in BOTH directions (you waive against the GC, GC waives against you). This is risk-symmetric + favorable. One-way WOS that only protects the GC is increasingly common + tilts risk toward the subcontractor.

Bottom line: WOS endorsements add 0-5% to your total commercial-insurance cost but unlock 80%+ of commercial subcontract opportunities. Per IRMI, WOS appears in >90% of commercial subcontract templates as a hard requirement.

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Common misconceptions

Myth: Signing a Waiver of Subrogation in my contract is enough — my carrier is bound by it.

Reality: It is not. A WOS clause in your contract obligates YOU, but does NOT automatically bind your insurance carrier. To make the WOS effective, your carrier must issue a specific endorsement (typically ISO CG 24 04 on GL, WC 00 03 13 on WC) waiving its subrogation rights. Without that endorsement on the policy, your carrier retains its statutory subrogation right + will pursue the counterparty after paying a claim — putting you in breach of your contract obligation. Always request the carrier WOS endorsement BEFORE signing the contract.

Myth: Waiver of Subrogation is the same thing as Additional Insured — I only need one.

Reality: They are different protections. Additional Insured extends YOUR policy's coverage to a third party (so they get defense + indemnity for claims arising from your work). Waiver of Subrogation prevents YOUR insurer from suing that third party AFTER paying a claim. Most commercial subcontracts require BOTH — plus primary-and-non-contributory language. The three together are called the "risk-transfer trifecta" + are standard in any sophisticated commercial relationship.

Myth: Waiver of Subrogation always costs me significant additional premium.

Reality: Usually it doesn't. Most national carriers (Hartford, Travelers, Hanover, Chubb, Nationwide) include blanket WOS at NO additional premium on GL when required by written contract. WC WOS (WC 00 03 13) typically costs 2-3% of WC manual premium when added as a named endorsement, but is free on a blanket basis with most carriers. Total WOS-related premium impact across a typical commercial-insurance package: $0-$500/year. The cost of NOT having WOS is potential breach-of-contract damages + loss of the commercial relationship.

Myth: Waiver of Subrogation protects me from being sued by my insurance carrier.

Reality: The WOS protects the third party, not you. Your insurer doesn't "sue you" via subrogation — they sue the responsible third party to recover what they paid on YOUR claim. WOS prevents that third-party suit. Where your carrier can recover from YOU directly is via: (1) premium audit for under-reported exposure, (2) policy-rescission for material misrepresentation at application, (3) violation of cooperation clause, (4) intentional acts excluded from coverage. WOS doesn't address any of those carrier-to-insured recovery paths.

Frequently asked questions

What is the difference between Waiver of Subrogation and Additional Insured?

Two different protections for two different scenarios. Additional Insured extends YOUR policy's coverage to a third party — so when a claim arises from your work, both you AND they get defense + indemnity from your carrier. Waiver of Subrogation prevents your carrier from later suing that same third party (under contribution / negligence theories) to recover what they paid on your claim. The two together prevent both gaps: AI gives the third party coverage they wouldn't otherwise have, and WOS prevents them from being sued by your carrier after the fact. Most sophisticated commercial contracts require BOTH plus primary-and-non-contributory — the risk-transfer trifecta.

Does Waiver of Subrogation cost extra on my policy?

Usually no — most national carriers include blanket WOS at no additional premium on GL when required by written contract. The standard form is ISO CG 24 04 (Waiver of Transfer of Rights of Recovery Against Others to Us). WC WOS (WC 00 03 13) typically costs 2-3% of WC manual premium when added as named-WOS, or is free on a blanket basis. Specific named WOS endorsements typically cost $50-$250/year. Verify with your broker BEFORE signing a contract that requires WOS — some specialty carriers + E&S markets charge for blanket WOS or won't issue it at all.

What policy types should Waiver of Subrogation be on?

Most commercial subcontracts require WOS on three policies: (1) General Liability (typically ISO CG 24 04 blanket form, covers third-party bodily injury + property damage). (2) Commercial Auto (covers driving exposures). (3) Workers Comp (WC 00 03 13 — protects the GC + project owner from your carrier seeking recovery for employee injuries). High-stakes commercial leases also require WOS on the tenant's Commercial Property policy (manuscripted endorsement). Some contracts also require WOS on Umbrella / Excess — typically "follows form" from the underlying GL. Read your contract carefully + verify each policy has the correct endorsement issued by the carrier BEFORE signing.

Can my insurance carrier refuse to provide a Waiver of Subrogation?

Yes — but it's rare with standard markets. Most national carriers (Hartford, Travelers, Hanover, Chubb, Nationwide) routinely provide blanket WOS endorsements when required by written contract. E&S markets, specialty carriers, and small/regional carriers MAY refuse — particularly on high-hazard classes, claims-heavy accounts, or specific named WOS for entities outside the named-insured relationship. If your carrier refuses + your contract requires WOS, options: (1) shop the policy with a broker who has access to WOS-friendly markets; (2) pay for a specific named-WOS endorsement; (3) renegotiate the WOS scope with the contract counterparty. Refusing to provide WOS when required = breach of contract + potential loss of the commercial relationship.

Does Waiver of Subrogation affect my claims handling?

Not for the initial claim payment. Your carrier will defend + indemnify the same way whether or not WOS is in place. Where WOS matters is AFTER the claim is paid — your carrier's subrogation department won't open a recovery file against the named third party. The trade-off: your carrier may apply a small premium credit reflecting reduced recovery potential, OR may simply absorb the reduced recovery cost into base rates. Your carrier will still pursue OTHER responsible parties (the adhesive manufacturer, the equipment vendor, etc.) — the WOS only blocks recovery against the specific contractual counterparty named in the endorsement.

Sources cited

Waiver of subrogation — International Risk Management Institute (IRMI) (2024)
ISO Commercial Liability Endorsement Forms — Verisk / ISO (2024)
Subrogation — Insurance Information Institute (III) (2024)

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Disclosures

📘 Educational content only. Reviewed by licensed Property & Casualty insurance agent Jason Wootton (NPN 7694718). Not insurance advice, an individual recommendation, or a solicitation in any state. Insurance regulations vary by state. For specific coverage decisions, consult a licensed insurance agent in your state.

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