Getting sued is expensive fast. Even a case that eventually goes nowhere can generate legal bills, expert costs, and pressure-filled decisions in the first few weeks. That is one reason liability policies often include a duty to defend—the insurer’s obligation to provide or pay for a defense when the claim potentially falls within coverage. In many jurisdictions, that defense duty is broader than the duty to indemnify, which is why small mistakes early on can leave policyholders paying costs that may have been shifted to insurance. Cornell Law, American Bar Association
If you are new to this topic, it may help to start with a broader overview of how the defense obligation, complaint allegations, and tender strategy fit together. This post focuses on a narrower problem: the common missteps that can increase out-of-pocket defense spending for businesses and individuals facing a lawsuit.
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Duty-to-defend disputes often turn on timing, wording, and process. Courts commonly evaluate whether the allegations in the complaint are at least arguably within policy coverage, and many jurisdictions resolve uncertainty in favor of a defense. American Bar Association, Cornell Law, law.resource.org
That broader standard can help policyholders, but only when the issue is raised clearly and early enough. Once defense fees start stacking up, disputes about tender, reservation-of-rights letters, selected counsel, and allegedly uncovered claims can become expensive side battles of their own. In general terms, the sooner a policyholder spots the problem, the easier it often is to preserve options.
Below are seven mistakes that frequently push defense costs back onto the policyholder.
One of the costliest mistakes is delay. A policyholder may receive a complaint, assume the claims are weak, and decide to “handle it first” before turning to insurance. That decision can create problems with notice, tender, and recovery of early defense costs.
State law varies significantly on the consequences of late notice. Some jurisdictions apply a prejudice requirement, meaning the insurer may have to show actual prejudice before avoiding coverage based on delay. Maryland, for example, requires affirmative proof of actual prejudice in certain contexts. Justia Other decisions have recognized that delayed notice does not automatically eliminate a defense obligation where the insurer still had a meaningful opportunity to protect its interests. American Bar Association, Justia
But that does not make delay harmless. In states with stricter notice rules, or under policies with specific reporting requirements, late tender can create a real fight over who pays for what. Even where the insurer ultimately accepts the defense, pre-tender fees are often disputed.
Here’s what this often means in practical terms: if legal invoices are already coming in before the carrier is put on notice, the policyholder may end up debating whether those early costs were reasonable, necessary, or recoverable at all.
Many policyholders think “my insurer” means one company and one policy. In reality, a single lawsuit can implicate several sources of defense coverage: a current CGL policy, prior-year policies, an umbrella layer, professional liability, E&O, D&O, EPLI, or additional-insured status under another party’s policy.
That matters because defense obligations can overlap, and in some settings multiple insurers may share responsibility for defense costs. Courts have recognized that where carriers share a defense obligation, allocation issues can follow. Cornell Law
This is one reason policyholders often spend more out of pocket than expected: they tender to the obvious carrier and leave other potentially responsive coverage untouched. Later, when bills grow, they discover there was another path to a funded defense all along.
A fuller tender strategy often includes reviewing: