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Liability Insurance

Duty to Defend in the CGL Policy

Craig Stanovich | July 11, 2025

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Arguably, one of the greatest benefits of most liability insurance policies is the insurer's duty to defend its insured. When considering that almost any person or organization may be a named defendant in a complaint, the value of this benefit becomes apparent. Even if you believe that you did nothing wrong, you will likely still need to defend your actions or inactions, which usually requires legal counsel to act on your behalf to answer the complaint, dispute the allegations, etc.

Typically, but certainly not in every case, the duty to defend an insured means the insurer is obligated to appoint legal counsel of its choosing—sometimes called a "panel counsel"—to defend its insured.

No liability policy requires the insurer to defend all lawsuits against its insured. For example, in late 2024, a federal court in Florida found that Publix Super Markets' liability insurance policies did not require its insurers to defend Publix's pharmacies in opioid litigation because "the causal connection between the specific injuries alleged and the damages plaintiffs seek in the opioid lawsuits is too attenuated to constitute damages 'because of bodily injury under Florida law.'" 1 Stated differently, the court determined the allegations against Publix were not within the scope of coverage, and thus, the insurers' duty to defend Publix was not triggered.

The Commercial General Liability (CGL) Form

This article centers on the duty to defend in the context of an occurrence-based commercial general liability (CGL) policy. 2

The CGL policy obligates an insurer to defend its insured 3 against any suit alleging damages because of bodily injury, property damage, or personal and advertising injury and to which the CGL policy applies. 4 The duty to defend is provided by an express grant of coverage contained in both the Coverage A—Bodily Injury and Property Damage Liability and Coverage B—Personal and Advertising Injury Liability insuring agreements. This promise to defend, which appears as a separate clause within each insuring agreement, 5 is subject to additional policy limitations, including policy exclusions.

If the damages being alleged are unquestionably not covered by the CGL policy, the insurer will have no duty to defend. A review of some of the factors to consider in determining the duty to defend in the CGL is addressed later in this article.

Duty to Defend Applies Only to a "Suit"

As noted above, the duty to defend is triggered only if a "suit" is filed or made against an insured.

A "suit" is defined in the CGL policy and means a civil proceeding, such as the filing of a complaint, more commonly known as a lawsuit. The definition of "suit" also includes arbitration proceedings if the insured is required to submit to such proceedings. An arbitration proceeding is also considered a "suit" if the insured elects to submit to the arbitration proceedings if the insurer consents. Other types of alternative dispute resolution proceedings (e.g., mediation) to which the insured submits are included within the term "suit" if the insurer provides its consent.

A threatening letter received by the insured from an injured party's legal counsel, informing the insured why they are responsible for injuries, may be a claim 6 but is not a "suit." While the insured has an obligation to notify its insurer "as soon as practicable of an 'occurrence' or offense which may result in a claim," the insurer has no obligation to defend the insured upon receipt of the attorney's letter. Although this matter may ultimately result in a "suit," it is not a "suit" when in the form of a threatening letter—and the insurer is not obligated, by the terms of the policy, to engage counsel and answer the letter.

Another example of what is not a "suit" and would not trigger the duty to defend is an action filed against an insured for negligent homicide. A negligent homicide proceeding is typically a criminal rather than civil proceeding and, thus, does not meet the definition of a "suit."

Governmental Agency Proceedings

An issue that has received considerable legal attention is whether a governmental agency proceeding triggers an insurer's duty to defend under the CGL policy. More specifically, an environmental authority may demand that an insured remediate contamination for which the environmental authority is holding the insured responsible, usually by the issuance of a potentially responsible party letter. While cases are mixed, some courts have found that such a demand is within the meaning of or substantially equivalent to a "suit."

For example, Michigan courts also have found that demand letters from regulators, specifically in the context of environmental regulations, can be considered "the functional equivalent of a suit brought in the court of law." 7

Breadth of Duty to Defend

It is generally acknowledged that the duty of defense in the CGL policy is broader in scope than the duty to pay on behalf of an insured. The basis for the maxim is twofold.

  • The insurer is required to defend covered claims even if the insured is ultimately found in a trial or other civil proceeding to have no legal obligation to pay damages; and
  • The insurer's obligation to defend is determined by the allegations contained in the suit and not by facts that may later be established that ultimately show the claim is not covered by the CGL policy. In other words, an insurer is required to defend claims that may, once all of the facts are known, turn out to be uncovered.

No Legal Responsibility to Pay Damages

The insurance company's duty to defend in the CGL policy, and the resulting payment of legal expenses, is easily triggered. The nature of litigation is such that allegations may be freely made, in some instances, with little or no basis in law or fact. It is another matter entirely to show the insured is legally obligated to pay for the damages that were alleged. As the CGL policies only pay damages when the insured is legally responsible for those damages, circumstances in which the insurer is obligated to pay damages represents only a fraction of the claims requiring defense of the same insured.

Groundless, False, or Fraudulent

While prior CGL form editions required the insurer to defend an insured "even if the allegations of the suit are groundless, false or fraudulent," this wording was removed beginning in 1986. However, the obligation to defend an insured in the post-1986 edition CGL policy does apply to "any suit." The phrase "any suit" has been interpreted to include suits alleging false information, complaints filed without legal grounds, or complaints intended to deceive.

It is worth noting that the "groundless, false or fraudulent" wording does not expand the CGL insuring agreement. Put differently, simply because the complaint alleges facts that are fabricated or alleges unrecognized causes of action does not mean that otherwise excluded allegations must now be defended. For example, a complaint may falsely allege a restaurant served a patron alcohol—the falsity of the allegation does not nullify the CGL liquor liability exclusion and obligate the insurer to defend an otherwise excluded dram shop suit. For more on groundless, false, or fraudulent suits, see "The Duty to Defend—Groundless, False, or Fraudulent."

Duty to Defend Determined by Allegations in a Suit

Most jurisdictions determine the duty to defend, at least initially, by reviewing the allegations made against the insured. If even one allegation is potentially or even possibly covered by the policy, the insurer's duty to defend is activated.

To illustrate, here is what the Supreme Court of Connecticut holds.

An insurer's duty to defend is triggered if at least one allegation of the complaint falls even possibly within the coverage.

Source: Travelers Cas. & Surety Co. of Am. v. Netherlands Ins. Co., 312 Conn. 714, 739, 95 A.3d 1031 (2014).

The Supreme Court of California has directly addressed how it expects insurers to view what is meant by potentially covered as follows.

To prevail [on the duty to defend], the insured must prove the existence of a potential for coverage, while the insurer must establish the absence of any such potential. In other words, the insured need only show that the underlying claim may fall within policy coverage; the insurer must prove it cannot.

Source: Montrose Chem. Corp. v. Superior Court, 6 Cal. 4th 290, 300 (1993).

Sometimes, it is difficult to decipher what, exactly, is being alleged. The resulting confusion or lack of clarity in the allegations does not necessarily mean the insurer can deny its insured a defense. To the contrary. For example, the Delaware Supreme Court found that any ambiguity or doubt in interpreting the allegations in the complaint should be resolved in favor of defending the insured.

Determining whether an insurer is bound to defend an action against its insured requires adherence to the following principles: (1) where there is some doubt as to whether the complaint against the insured alleges a risk insured against, that doubt should be resolved in favor of the insured; (2) any ambiguity in the pleadings should be resolved against the carrier; and (3) if even one count or theory alleged in the complaint lies within the policy coverage, the duty to defend arises.

Source: Pacific Ins. Co. v. Liberty Mut. Ins. Co., 956 A.2d 1246 (Del. 2008).

The question often arises as to what information the insurer must consider when determining whether the allegations in the complaint set in motion its duty to defend its insured. In other words, must the insurer consider only what is alleged in the complaint, or must the insurer consider both the allegations in the complaint and certain information that is outside of the complaint—what, in this context, is generally referred to as "extrinsic evidence." The following are the two common approaches to this question.

The "Four Corners" Complaint Test

In this traditional test, courts will only look at the allegations in the suit and compare them to the coverage provided in the CGL policy. 8 If any of the allegations are potentially covered by the policy, the duty to defend is established. If none of the allegations in the complaint are potentially covered by the CGL policy, the insurer can generally refuse to defend.

The defining characteristic of the "four corners" test is that the duty to defend is determined only by the allegations in the complaint and that any evidence or facts outside of the complaint are not to be considered. The following excerpt from the Supreme Court of Pennsylvania helps illustrate the "four corners" test.

In determining whether an insurer has a duty to defend, a court examines only the factual allegations made in the complaint, and cannot consider additional information which may come to light in discovery.

Source: Kvaerner Metals Div. of Kvaerner US, Inc. v. Commercial Union Ins. Co., 908 A.2d 888, 896 (Pa. 2006).

However, those states that follow the "four corners" rule may not do so in all circumstance and may recognize some limited exceptions.

Consider a complaint in which the plaintiff alleges the insured assaulted the plaintiff. Recall that the CGL policy provides coverage for the insured against such allegations when acting in self-defense—the coverage is provided as an express exception to the expected or intended injury exclusion. 9 But this exception will be worthless if the court viewed only the allegations in the complaint, as no one would expect the plaintiff to allege the insured was acting in self-defense. The Florida Supreme Court, which is a "four corners" state, recognized some exceptions.

We note, however, that there are some natural exceptions to [the four corners rule] where an insurer's claim that there is no duty to defend is based on factual issues that would not normally be alleged in the underlying complaint.

Source: Higgins v. State Farm Fire & Cas. Co., 894 So.2d 5, 10 (Fla.2004).

Extrinsic Evidence

Some jurisdictions look beyond how the allegations are stated to the basis of the allegations. This approach may result in a justifiable denial to defend an action that appears on its face to be a potentially covered claim. Or the opposite—this approach may result in a duty to defend a complaint that does not appear to include allegations that point to possible coverage. Here is a New York federal court's statement as to the use of evidence that is outside of the complaint.

The insurer must defend 'whenever the four corners of the complaint suggest—or the insurer has actual knowledge of facts establishing—a reasonable possibility of coverage' under the policy. An insurer cannot ignore information supplied by the insured in assessing its duty to defend. An insurer may avoid its duty to defend only if it establishes, as a matter of law, that "there is no possible factual or legal basis on which [the insurer] might eventually be obligated to indemnify [the insured] under any provision of the insurance policy."

Source: United Parcel Service v. Lexington Ins. Group, 983 F. Supp. 2d. 258 (S.D.N.Y. 2013).

Another court explained the purpose of using extrinsic evidence as follows.

As an aid to interpreting the complaints. We do not consider them as independent grounds for a duty to defend. Functioning in this limited role, extrinsic facts work … to add substance and meaning to skeletal claims … in the complaint. These facts, brought to the insurer's attention in a timely fashion by the insured, aid the insurer's informed review of the tender of defense by painting a fuller picture of the underlying action.

Source: Open Software Found, Inc. v. U.S. Fid & Guar. Co., 307, F.3d 11 (1st Cir. 2002).

In a nutshell, in "extrinsic evidence" states, both the allegations in the complaint and other evidence that may demonstrate the possibility of coverage (or no possibility of coverage) should be considered in determining the insurer's duty to defend.

Defense of the Entire Claim

If just one of several allegations in a complaint is potentially covered by the CGL policy (but the other allegations are not potentially covered), the insurer generally has a duty to defend the entire claim, including the claims that are not potentially covered, at least until the potentially covered claim is resolved. The resolution may occur in several ways, including a judicial determination that the one potentially covered claim actually falls outside of the scope of the CGL coverage.

The duty to defend all allegations in a suit in which only one allegation is possibly covered is concisely articulated by the Maryland Special Court of Appeals (now the Appellate Court of Maryland).

If any claims potentially come within the policy coverage, the insurer is obligated to defend all claims, "notwithstanding alternative allegations outside the policy's coverage, until such times … that the claims have been limited to ones outside the policy coverage."

Source: Utica Mut. Ins. Co. v. Miller, 130 Md. App. 373, 746 A.2d 935, 940 (Md. Ct. Spec. App.2000).

The reasoning for this rather expansive obligation is that the insurance company must defend the entire case for it to provide a timely defense. Attempting to sort out potentially covered and potentially uncovered allegations, which may ultimately be a futile attempt, would delay the defense. Failure to provide an immediate defense is considered a failure to provide a meaningful defense. The seminal case that stands for this proposition is the Supreme Court of California case of Jerry Buss v. Superior Court of Los Angeles County, 939 P.2d 766 (Cal. 1997).

Reimbursement of Defense Costs

The above is sometimes called a "mixed action." A "mixed action" means the complaint includes an allegation or allegations that are potentially covered but also includes allegations that are plainly not potentially covered. As the insurer is required to defend all allegations, including those not potentially covered, has the insured gotten more than they have bargained for and is, thus, unjustly "enriched" when receiving the benefit of defense for uncovered allegations? If so, does the insurer have a right to its money back (restitution) for the additional defense costs?

An insurer will generally not be able to recover from an insured the cost of defending any claim that was potentially covered by the CGL policy but ultimately was determined not to be a covered claim. The cost of such defense is considered part of the insurer's duty to defend as afforded in the CGL form. In fact, some courts have referred to this independent duty to defend as "litigation insurance."

But what about the uncovered allegations? The results are decidedly mixed. For those allegations that were never potentially covered by the CGL policy, but which were defended as part of a complaint containing other potentially covered allegations, reimbursement from an insured may be allowed. (Jerry Buss v. Superior Ct. of Los Angeles Cty.) But even following Buss, reimbursement may not be easy to obtain, as the burden is on the insurance company to clearly demonstrate which defense costs specifically can be allocated to the uncovered allegations. Absent such a clear allocation, the insurance company will likely not have a right to reimbursement from an insured for defense costs.

Some courts have disallowed insurers from obtaining reimbursement from its insured for defending uncovered allegations in a "mixed." The Supreme Court of Pennsylvania prohibited reimbursement and found as follows.

By providing a defense to Insured, therefore, Royal acted as much in its own interest as it did in the Insured's. It would be unjust to require Insured to reimburse Royal for the cost of the defense where Royal invoked its right to defend in part to protect its own interest.

Source: American & Foreign Ins. Co. v. Jerry's Sport Center, Inc., 2 A.3d 526 (Pa. 2010).

Other courts have denied insurer's reimbursement of defense costs, as the purported right to such reimbursement does not appear in the CGL policy and would be no more than a "backdoor narrowing of the duty to defend." (Perdue Farms v. Travelers Cas. & Sur. Co., 448 F.3d 252 (4th Cir. 2006), applying Maryland law.)

Terminating the Duty to Defend

The CGL insuring agreements for both Coverage A—Bodily Injury and Property Damage Liability and Coverage B—Personal and Advertising Injury specifically state when an insurance company's duty (and right) to defend may be discontinued—that is when the applicable limit has been used up in the payment of judgments or settlements.

Popular belief to the contrary not withstanding, this limitation does not allow an insurance company to terminate their obligation to defend by simply offering to pay the applicable limit or paying the limit into a court or to the insured. Such a tactic would be counter to the widely accepted view that the duty to defend is an independent duty arising out of a separate promise of protection within the CGL policy. Defense of an insured must continue until the case reaches its conclusion, either by settlement with the claimant(s) or by court adjudication. In some jurisdictions, an insurer may have a further duty to appeal if reasonable grounds for an appeal are present.

The issue of how an insurer may discharge its duty to defend is particularly important when the policy limit is clearly inadequate to fully indemnify the claimants. For example, a CGL policyholder has purchased an each occurrence limit of $300,000 but is faced with what will almost certainly be a multimillion dollar settlement or judgment. While the CGL insurer may wish to tender its limits and withdraw from the case, the majority rule is that the CGL insurer is bound to continue to defend the claim until its resolution, regardless of the cost of defense.

When the Duty to Defend Is in Dispute

While it is generally settled that a CGL insurer must defend any suit that contains allegations that are potentially covered under the policy, there may be a legitimate disagreement as to what constitutes a potentially covered allegation. When a policyholder demands defense of a suit, asserting that at least one of the allegations is potentially covered by the CGL policy, but which the insurer does not believe they are obligated to defend, several options are available.

Disclaim the Duty to Defend

An insurer may be able to clearly demonstrate that the suit has no possibility of being covered by the CGL policy. This may be evident for allegations that do not seek—even remotely—bodily injury, property damage, personal injury, or advertising injury, or if the allegations are not made against an insured in the CGL policy.

However, considering that any doubt regarding the duty to defend may be resolved in favor of the insured, refusing to defend may not be the best course of action. As insurers are acutely aware, such a denial may result in a breach of contract or bad faith complaint from the policyholder. In some situations, the breach of the duty to defend may result in the insurer relinquishing its coverage defenses. Therefore, other options are often considered.

Reservation of Rights

Where there is a possibility that CGL exclusions may apply to eliminate potential coverage or if some of the allegations are clearly not potentially covered by the CGL policy, the insurer may begin their defense but reserve their right to withdraw from defense as facts are established. Typically, the insured is advised that they may need to retain their own counsel.

Some states view the issuance of a reservation of rights letter as creating a possible conflict of interest. Other states review the possible conflict on a case-by-case basis. If a conflict of interest results, the insurer may be required to appoint separate independent counsel to represent the insured. Or it may allow the insured to defend itself, with the insurer being required to reimburse the insured's cost of its own defense.

California, arguably one of the stronger advocates of the appointment of independent counsel, ruled as follows.

Where there are divergent interests of the insured and the insurer brought about by the insurer's reservation of rights based on possible noncoverage under the insurance policy, the insurer must pay the reasonable cost for hiring independent counsel by the insured.

Source: San Diego Federal Credit Union v. Cumis Ins. Society, Inc., 162 Cal. App. 3d 358 (1984).

Declaratory Judgment

Insurers do have the option, either in lieu of or in addition to reserving their rights, to request the court to decide a dispute as respects their duty to defend via a declaratory judgment action. In essence, the insurer files an action asking the court to rule and declare the rights of each party under the CGL policy regarding defense.

The idea is that the insurer will have an impartial party (the court) decide if it has a duty to defend but will continue to defend unless and until the court formally declares the insurer did not have an obligation to defend its insured.

While courts typically look with favor on this approach—seeking a declaratory judgment in lieu of a flat denial of defense to the insured—this approach often alarms policyholders. Being named as a defendant in litigation brought against you by your own insurer is, at the very least, disconcerting. The policyholder will need to engage counsel to defend against the declaratory judgment action, who often countersues and also sues the insurance producer on the unsupported (at least at this stage) theory that, if the insurer is not defending, the insurance producer did not obtain the "right" insurance.

At least one court addressed this issue and found that, if the insurer loses the declaratory judgment action on its merits (even if the insurer continues to provide defense after commencing the action for declaratory judgment), the insurer is liable not only for any costs to defend incurred by the insured but also for the cost incurred by the insured for reasonable attorneys' fees and expenses in establishing the insurer's duty to defend. The Supreme Judicial Court of Massachusetts ruled as follows.

It is immaterial whether the insurer proceeds in good faith or in bad faith to avoid the duty to defend under a liability insurance policy because "[t]o impose upon the insured the cost of compelling his insurer to honor its contractual obligation is effectively to deny him the benefit of his bargain." "The entitlement of an insured to attorneys' fees and costs incurred in establishing contested coverage depends exclusively on whether that coverage is ultimately determined to exist. It does not depend on whether the denial of coverage by the insurer was reasonable or unreasonable, justified or unjustified, a close question of fact or a matter not even subject to legitimate dispute. The focus is exclusively on the bottom line."

[Citation omitted.]

Source: Hanover Ins. Co. v. Golden, 436 Mass. 584 (2002).

This case appears to be in the minority, as usually an insurer will not be required to pay for the insured's cost of enforcing the right to defense unless the insurer acted in bad faith.


Opinions expressed in Expert Commentary articles are those of the author and are not necessarily held by the author's employer or IRMI. Expert Commentary articles and other IRMI Online content do not purport to provide legal, accounting, or other professional advice or opinion. If such advice is needed, consult with your attorney, accountant, or other qualified adviser.


Footnotes

1 Publix Super Mkts., Inc. v. Ace Prop. & Cas. Ins. Co., No. 8:22-cv-2569-CEH-AEP, 2024 U.S. Dist. LEXIS 195956 (M.D. Fla. Oct. 29, 2024). "The Court concludes that the underlying lawsuits do not allege damages because of bodily injury, and therefore, the 2013 insurers do not have a duty to defend Publix in the underlying lawsuits."
2 Insurance Services Office, Inc., Commercial General Liability Coverage Form (CG 00 01 04 13), © 2012.
3 "The word 'insured' means any person or organization qualifying as such under Section II—Who is An Insured."
4 "However, we will have no duty to defend the insured against any 'suit' seeking damages … to which this insurance does not apply."
5 "We will have the right and duty to defend the insured against any 'suit' seeking those damages."
6 The term "claim" is not defined in an occurrence based CGL policy (CG 00 01).
7 Trident Fasteners, Inc. v. Selective Ins. Co. of SC, No. 21-1439, 2022 U.S. App. LEXIS 21692 (6th Cir. Aug. 3, 2022).
8 Texas refers to this as the "eight corners" test—comparing the four corners of the complaint to the four corners of the policy.
9 "This exclusion does not apply to 'bodily injury' resulting from reasonable force to protect persons or property."