What Is Subrogation and Why Does It Matter?
Subrogation is a legal doctrine that gives an insurance company the right to "step into the shoes" of its insured and pursue claims against third parties who caused or contributed to an insured loss. The logic: if your insurer pays you for a loss caused by someone else, the insurer shouldn't simply absorb that loss — it should be able to recover from whoever was actually at fault.
In a non-commercial context, subrogation is common and uncontroversial: your auto insurer pays your collision claim after another driver runs a red light, then sues the other driver to recover what it paid. The other driver's auto insurer handles the subrogation claim. This keeps insurance premiums lower for everyone and places the ultimate economic loss on the at-fault party.
In a commercial lease context, subrogation creates a significant problem: tenants and landlords are in a long-term, interdependent economic relationship. If a tenant accidentally causes a fire and the landlord's property insurer pays the claim, then the insurer sues the tenant for that fire — the insurer is now pursuing a party who has a 7-year lease obligation with the landlord, disrupting the commercial relationship, exposing the tenant to a potentially large claim that it did not budget for, and potentially driving the tenant into a financial crisis that destroys the landlord's rental income stream. The waiver of subrogation clause prevents this dynamic by having both parties agree — in advance — that their respective insurers will not pursue the other party for covered losses.
The $280K Fire Claim: Real Math
LANDLORD: Property investor, owns the building outright
LEASE: 10-year NNN lease, $55/sf/yr = $176,000/yr
INCIDENT
Cause: Restaurant kitchen fire — tenant's commercial fryer overheated
due to failure to replace worn thermostat (tenant's maintenance
obligation under the NNN lease)
Fire spread: Tenant's kitchen, adjacent storage room, and adjacent
common corridor ceiling — landlord-owned building components
Tenant's fire suppression system: Activated but insufficient
Damage: Tenant buildout ($95,000) + landlord building structure ($280,000)
INSURANCE CLAIMS
Tenant's property insurance pays: $95,000 (tenant's buildout/FF&E)
Landlord's property insurance pays: $280,000 (building structure)
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SCENARIO A: NO WAIVER OF SUBROGATION IN LEASE
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Landlord's property insurer pays $280,000 to landlord ✓
Insurer exercises subrogation rights against tenant:
Files subrogation suit against tenant: $280,000 claim
Tenant's CGL insurer: Defends and pays (within $1M limit)
Defense costs (tenant's CGL): $42,000
Settlement (tenant's CGL): $238,000 (after $42K deducted)
Tenant's deductible: $10,000
Tenant's CGL limit consumed: ~$280,000 of $1M limit
Premium increase (3 years, est.): $22,000
TENANT DIRECT ECONOMIC COST:
Deductible: $10,000
Premium increase: $22,000
Management time: substantial
Lease relationship: severely strained (insurer suing tenant
destroys goodwill; landlord forced into adversarial
posture with tenant even if landlord preferred not to)
TOTAL ECONOMIC IMPACT ON TENANT: ~$32,000+ direct + relationship damage
BUT — if tenant's CGL insurer refuses the claim (arguing the
negligence was so gross it constitutes willful conduct, or that
the "maintenance obligation" created contractual liability the
policy excludes), tenant faces:
Direct out-of-pocket: $280,000
Plus legal fees: $42,000+
TOTAL: $322,000+ directly from tenant's pocket
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SCENARIO B: MUTUAL WAIVER OF SUBROGATION IN LEASE
─────────────────────────────────────────────────────────────
Lease contains: "Landlord and Tenant each waive, and shall cause
their respective insurers to waive, any right of subrogation
against the other party."
Both parties' policies contain a waiver of subrogation endorsement
(CG 24 04 on CGL; equivalent endorsement on property policy).
Landlord's property insurer pays $280,000 to landlord ✓
Insurer attempts to subrogate against tenant: BLOCKED
— Landlord's policy has waiver of subrogation endorsement
— Insurer is contractually precluded from pursuing tenant
— No suit filed; no claim on tenant's CGL; no deductible
TENANT DIRECT ECONOMIC COST: $0
LEASE RELATIONSHIP: Intact
─────────────────────────────────────────────────────────────
DELTA (With WOS vs. Without WOS)
Direct cost avoided: $32,000 (insured scenario)
Maximum risk avoided: $322,000 (uninsured scenario)
Relationship damage avoided: Significant
Cost of adding WOS to lease: $0
WOS Comparison: With, Without, and Partial
| Scenario | Landlord's Insurer vs. Tenant | Tenant's Insurer vs. Landlord | Tenant Exposure | Landlord Exposure |
|---|---|---|---|---|
| Mutual WOS in Lease + Policy Endorsements | Blocked — can't pursue tenant | Blocked — can't pursue landlord | None for covered property losses | None for covered property losses |
| No WOS in Lease | Can pursue tenant for full loss | Can pursue landlord for full loss | Up to full property damage amount | Up to full property damage amount |
| Partial WOS (Tenant-Only Waiver) | Can still pursue tenant | Blocked by tenant waiver | Exposed to landlord's insurer | Protected from tenant's insurer |
How Waiver of Subrogation Interacts With Each Insurance Type
Property Insurance (Building and Contents)
Property insurance is where waiver of subrogation matters most in a commercial lease context. The landlord's building property policy covers the structure; the tenant's property insurance covers its contents, fixtures, and improvements. When property damage occurs — fire, water leak, building collapse — the respective property insurers pay their insureds. Without WOS, the paying insurer pursues the other party for any loss it can attribute to that party's negligence or breach.
Most commercial property insurance policies contain a "transfer of rights of recovery" clause that permits pre-loss waivers of subrogation — meaning the policy allows the insured to contractually waive subrogation rights against specified parties before a loss occurs. Confirming that your policy permits the waiver (and obtaining an endorsement if required) is essential; without it, the contractual waiver in the lease may not bind the insurer.
Commercial General Liability (CGL) Insurance
CGL insurance covers bodily injury and property damage liability claims against the insured. Waiver of subrogation in a CGL context is less common as a lease provision (since CGL is liability insurance, not first-party property insurance, the subrogation mechanism works differently), but it is still relevant. The ISO CG 24 04 endorsement — "Waiver of Transfer of Rights of Recovery Against Others to Us" — allows the insured to waive CGL subrogation rights against specified parties. Require this endorsement for the landlord and any specified parties named in your lease insurance requirements.
Builder's Risk Insurance
Builder's Risk insurance is perhaps the most critical application of the waiver of subrogation during the tenant improvement construction period. Builder's Risk covers property under construction against fire, theft, vandalism, and weather events. During construction:
- The building is at heightened risk (open walls, temporary utilities, combustible materials)
- Multiple contractors, subcontractors, and suppliers are working on the property
- The lines of responsibility for damage are often unclear
If the landlord's Builder's Risk insurer pays a $180,000 fire claim during construction and then pursues the tenant's general contractor for subrogation, the tenant — who indemnified the general contractor under the construction contract — may ultimately be responsible for the subrogation recovery. A WOS in the Builder's Risk policy, and a corresponding WOS in the construction contract, prevents this chain reaction.
Builder's Risk WOS Best Practice: The lease should require mutual WOS for Builder's Risk policies during construction periods. The WOS should extend to the parties' contractors, subcontractors, and sub-subcontractors. The tenant's construction contract with its general contractor should include back-to-back WOS provisions consistent with the lease.
Business Interruption Insurance
Business interruption (BI) insurance covers lost revenue and continuing expenses when a covered property loss forces a business to cease or reduce operations. If a fire causes the landlord to close the building for 3 months for repairs, the tenant's BI insurance covers the tenant's lost revenue during that period. Without a WOS, the tenant's BI insurer (having paid the tenant for the lost revenue) could subrogate against the landlord's insurer — or the landlord directly — for the landlord-caused shutdown. A mutual WOS should explicitly include business interruption coverage: "Each party waives, and shall cause its insurers (including its business interruption insurer) to waive, all rights of subrogation against the other party."
Additional Insured vs. Waiver of Subrogation: The Critical Distinction
Landlords routinely require tenants to name the landlord as an "additional insured" on the tenant's CGL policy. This is a different protection from a waiver of subrogation — and the two provisions are frequently confused in lease negotiations.
Additional Insured Status
When the landlord is named as an additional insured on the tenant's CGL policy, the landlord can make direct claims under the tenant's CGL policy for covered liability claims arising from the tenant's operations. For example: a customer is injured at the tenant's store and sues both the tenant and the landlord (because the landlord owns the building). The landlord, as additional insured, can tender the defense to the tenant's CGL insurer, which defends both the tenant and the landlord under the same policy. Additional insured status is forward-looking: it protects against future liability claims.
Waiver of Subrogation
Waiver of subrogation is backward-looking: it prevents an insurer from recovering insurance proceeds it has already paid. After an insured loss, if the insurer paid the claim, the WOS blocks the insurer from suing the other party to recover. Additional insured status does not prevent an insurer from suing the other party in subrogation after a first-party property loss — only a WOS does that. The landlord could be an additional insured on the tenant's CGL, and the landlord's property insurer could still sue the tenant for a fire claim, because the additional insured status runs on the CGL policy (liability), not on the landlord's property policy (first-party property).
✓ Both Are Required — They Serve Different Purposes
A complete commercial lease insurance program requires both: the landlord named as additional insured on the tenant's CGL (forward liability protection), and a mutual waiver of subrogation in both parties' property and CGL policies (backward recovery protection). Requiring one without the other leaves a gap.
Obtaining and Evidencing WOS: Practical Steps
Step 1: Confirm the Lease Requires Mutual WOS
The lease should explicitly require both parties to include a waiver of subrogation in all required insurance policies — not just the tenant's. Many lease forms require the tenant to carry insurance with a WOS but do not impose a reciprocal obligation on the landlord's insurance. Insist on mutual WOS language that covers property, CGL, and Builder's Risk policies for both parties.
Step 2: Review Your Policy for WOS Permissibility
Before signing the lease, review your commercial property policy for a "transfer of rights of recovery" or "subrogation" clause. Most ISO-form commercial property policies permit pre-loss waivers of subrogation without an endorsement. If your policy does not, obtain an endorsement before the lease is signed — do not wait until after a loss to discover the policy does not permit the waiver.
Step 3: Obtain the Required Endorsements
For CGL policies, obtain ISO form CG 24 04 ("Waiver of Transfer of Rights of Recovery Against Others to Us") or the equivalent in your insurer's form. This endorsement should name the landlord (and any landlord entities, affiliates, and property managers) as the parties against whom subrogation is waived. For property policies, confirm the waiver of subrogation endorsement is attached and that it covers the landlord and the specific property.
Step 4: Evidence the WOS in Your Certificate of Insurance
The ACORD 25 certificate of insurance and the ACORD 28 evidence of property insurance both have specific fields for noting waiver of subrogation status. Ensure your insurance certificate delivered to the landlord at lease commencement (and annually at policy renewal) explicitly notes "Waiver of Subrogation in favor of [Landlord name]" for each required policy. A certificate that does not affirmatively note the WOS will trigger a landlord request for clarification and may not satisfy the lease's insurance requirements.
6 Red Flags in Commercial Lease Waiver of Subrogation Provisions
🛑 Red Flag 1: No Mutual Waiver — Only Tenant Required to Waive
The most common WOS drafting defect: the lease requires the tenant to carry insurance with a waiver of subrogation endorsement in favor of the landlord, but the landlord has no reciprocal obligation to maintain a WOS in its property insurance in favor of the tenant. This asymmetric structure means the tenant's insurer cannot subrogate against the landlord (because the tenant has waived its insurer's rights), but the landlord's insurer retains full subrogation rights against the tenant. The tenant gets all the downside of the waiver (giving up its insurer's recovery rights against the landlord) with none of the upside (protection against the landlord's insurer). Always negotiate a mutual waiver: both parties shall cause their respective insurers to waive subrogation rights against the other party.
🛑 Red Flag 2: WOS in Lease But No Policy Endorsement
A waiver of subrogation in the lease is a contractual obligation between the parties — but it binds only the parties, not the insurer. If the tenant agrees to waive its insurer's subrogation rights but never actually obtains the required endorsement or confirms the policy permits the waiver, the landlord's insurer is not bound by the contractual WOS and can still sue the tenant. The contractual WOS creates a breach of lease claim against the party that failed to obtain the endorsement — but the injured party still faces the subrogation suit in the meantime. Verify with your insurance broker that the required WOS endorsements are actually in place before signing the lease, and confirm annually at renewal.
🛑 Red Flag 3: WOS That Doesn't Cover Builder's Risk During Construction
A standard lease WOS that covers property and CGL insurance but is silent on Builder's Risk leaves a gap during the construction period — which is the highest-risk period for property damage in the entire lease. Fires, water damage, and structural damage during TI construction can be substantial. If the landlord's Builder's Risk insurer pays a construction-period claim and then subrogate against the tenant's contractor or the tenant directly, the tenant faces a claim it expected the WOS to prevent. Explicitly include Builder's Risk in the WOS provision: "The mutual waiver of subrogation shall extend to all required insurance policies, including without limitation Builder's Risk policies maintained during any construction period under this Lease."
🛑 Red Flag 4: WOS That Expires or Is Not Renewed Annually
Insurance policies renew annually; endorsements attached to a policy must be renewed each year. Some tenants obtain a WOS endorsement at lease commencement and then forget to renew it when their policy renews. If a loss occurs in the policy year after an endorsement lapsed, the insurer is not bound by the expired endorsement and may exercise its subrogation rights. Build WOS endorsement renewal into your annual insurance renewal checklist, and confirm that your insurance certificate delivered to the landlord at each policy renewal reflects the current WOS endorsement status.
🛑 Red Flag 5: WOS That Covers Only Property Insurance, Not Business Interruption
Business interruption insurance is a separate policy (or a rider to the property policy) that covers lost revenue when a covered property loss shuts down operations. If a fire forces the building to close for 3 months and the tenant's BI insurer pays for the lost revenue, without a WOS extension to BI coverage, the tenant's BI insurer can subrogate against the landlord for any portion of the shutdown attributable to the landlord's failure to promptly restore the building. Extend the WOS explicitly to business interruption coverage: "Each party waives all rights of subrogation, including under any business interruption or loss of income insurance policy, against the other party."
🛑 Red Flag 6: WOS That Does Not Extend to Landlord's Contractors and Property Managers
The WOS in a commercial lease typically runs between the landlord entity and the tenant. But losses are frequently caused by the landlord's property management company, general contractor, HVAC technician, or janitorial service — parties who are agents of the landlord but not the landlord itself. If the WOS is narrowly drawn to cover only "Landlord" (the entity), the insurer may still subrogate against the property manager, the contractor, and ultimately against the tenant through indemnification obligations. Extend the WOS to the landlord's agents, employees, contractors, property managers, and affiliates — and require the landlord to extend its WOS to cover the tenant and its agents, contractors, and affiliates as well.
✅ 12-Item Waiver of Subrogation Checklist
- Confirm the lease contains a mutual waiver of subrogation: Both parties should be required to cause their respective insurers to waive subrogation rights. A one-sided WOS that requires only the tenant to waive is insufficient. Review the specific lease language for directionality.
- Confirm WOS covers all required insurance types: The waiver should extend to property insurance, CGL insurance, Builder's Risk insurance, and business interruption coverage. A WOS limited to "property insurance" only leaves gaps in liability, construction, and income protection contexts.
- Verify your property policy permits pre-loss waivers: Review the "transfer of rights of recovery" clause in your commercial property policy. Most ISO-form policies permit pre-loss waivers without endorsement; confirm this with your broker before relying on it.
- Obtain CGL WOS endorsement (ISO CG 24 04 or equivalent): Request a formal endorsement to your CGL policy waiving subrogation rights against the landlord and its agents, employees, and contractors. Provide the endorsement to the landlord as part of your lease insurance certificate delivery.
- Extend the WOS to the landlord's agents, contractors, and property managers: Negotiate that the WOS covers not just the landlord entity but also its property management company, contractors, subcontractors, and affiliates — and require the landlord's WOS to similarly cover the tenant's agents and contractors.
- Confirm Builder's Risk WOS is in place during construction: For any lease with significant TI construction, require the landlord's Builder's Risk policy to include a WOS in favor of the tenant and its contractors. Obtain a corresponding WOS in your own Builder's Risk policy (if you are carrying one for tenant work) in favor of the landlord.
- Confirm WOS extends to business interruption coverage: Explicitly confirm or negotiate that the mutual WOS extends to business interruption and loss of income insurance policies maintained by each party. Add "including business interruption and loss of income coverage" to the WOS provision if not already included.
- Reflect WOS on your annual certificate of insurance: At each policy renewal, confirm with your broker that the WOS endorsements are renewed and reflected on the updated ACORD 25/28 certificates of insurance delivered to the landlord. Build WOS renewal into your annual insurance review calendar.
- Confirm the WOS is in the construction contract: If your TI construction involves a general contractor and subcontractors, the WOS should be reflected in the construction contract — requiring the GC and all subs to waive subrogation rights against the landlord and tenant. A WOS in the lease that is not carried through to the construction contract creates a gap during the construction period.
- Check that the landlord's insurer is also required to waive: The lease should impose a positive obligation on the landlord to cause its property insurer to waive subrogation against the tenant — not just a passive acknowledgment that the landlord "waives" its own rights. The landlord's insurer is the party that would actually file a subrogation claim; the landlord must affirmatively bind its insurer to the waiver through a policy endorsement or policy provision.
- Understand the WOS limitation for willful misconduct: Most WOS provisions carve out intentional acts and willful misconduct — neither party's insurer can be required to waive subrogation rights against a party that intentionally caused the insured loss. Confirm the carve-out is mutual and limited to actual willful misconduct (not negligence, not gross negligence in most jurisdictions).
- Confirm the WOS survives lease termination for claims arising during the term: The WOS should survive lease termination for any claims arising from losses that occurred during the lease term — even if the claim is not filed or the insurer does not seek recovery until after the lease has expired. Add a survival provision: "The obligations under this Section shall survive the expiration or earlier termination of this Lease for any claims arising from occurrences during the Lease term."
Frequently Asked Questions
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