Complete Defense Cost Coverage in E&O Guide for Insurance Agencies

Defense cost coverage is the most financially consequential structural feature in an agency E&O policy - and most agencies do not know what structure their policy uses until a claim forces the question. The two structures are defense inside the limit and defense outside the limit. The difference can determine whether an agency has enough indemnity left to settle a claim after attorney fees are paid.

Average E&O defense costs run $15,000 to $45,000 before a case resolves, according to Swiss Re/Westport's 2024 Agency E&O Claims Report. On a $100,000 per-occurrence limit with defense inside the limit, a $40,000 defense spend leaves only $60,000 for indemnity. For a mid-sized agency facing a serious professional liability claim, that structure creates real exposure.

Key Takeaways

• Defense inside the limit (also called "eroding limits") means attorney fees and defense costs reduce the indemnity available for settlement. The $100,000 limit must cover both.
• Defense outside the limit means the carrier pays defense costs separately, in addition to the indemnity limit. The full $100,000 remains available for settlement.
• The average E&O defense cost is $15,000 to $45,000 before resolution, even for meritless claims (Swiss Re/Westport 2024 data).
• The retention on an E&O policy is not the same as a standard deductible. Some E&O retentions apply to defense costs and indemnity combined; others apply to indemnity only.
• Duty-to-defend policies give the carrier the right to control defense. Reimbursement policies require the insured to defend itself and reimburse. Most agency E&O is duty-to-defend.
• Notary E&O defense costs average $3,000 to $8,000 per incident - low compared to agency E&O, but the notary market uses defense-inside-the-limit almost universally.

Defense Inside vs Outside the Limit: The Core Distinction

Professional liability policies structure defense costs in one of two ways. Understanding which structure your E&O policy uses requires reading the policy declarations and insuring agreement, not just the summary sheet.

Defense Inside the Limit

Defense inside the limit (also called "eroding limits," "wasting limits," or "inclusive defense costs") means every dollar spent on attorney fees, expert witnesses, depositions, and court costs reduces the policy's available indemnity limit.

Example: A client sues an agency for $200,000 alleging a coverage recommendation error. The agency's E&O policy has a $1 million occurrence limit with defense inside the limit. The carrier assigns defense counsel. Over 18 months, defense costs reach $85,000. The carrier settles for $110,000. Total paid: $195,000. The policy's remaining available limit for the policy period is now $805,000 - not $1 million.

In a serious case where defense runs long, the erosion is more dramatic. A complex agency E&O matter in litigation for three years can generate $200,000 to $350,000 in defense costs before settlement. On a $500,000 occurrence limit with defense inside, that leaves as little as $150,000 for indemnity - dangerously low if the underlying claim is substantial.

Defense Outside the Limit

Defense outside the limit (also called "non-eroding limits" or "in addition to the limit") means the carrier pays defense costs separately, entirely outside the indemnity limit. The full occurrence limit remains available for settlement or judgment.

Using the same example: the carrier spends $85,000 on defense. It settles for $110,000. Total paid: $195,000. The policy's available limit for the policy period remains the full $1 million because the defense costs did not consume any of the indemnity limit.

Defense outside the limit provides substantially more protection - and carriers charge more for it. The premium difference for defense outside vs inside the limit typically runs 8% to 15% of base premium. For an agency paying $12,000 annually for E&O, the difference is $960 to $1,800 per year.

Which Agencies Need Defense Outside the Limit

Small agencies (under $1 million in revenue) with standard limits of $500,000/$500,000 or $1 million/$1 million often accept defense inside the limit because the premium savings matter and their exposure profile is more limited.

Larger agencies - those writing complex commercial risks, managing benefits programs, or handling large real estate transactions - should strongly consider defense outside the limit. The factors that increase defense cost exposure:

• Complex commercial coverage disputes (construction, environmental, professional liability)
• High-value accounts where a single coverage gap claim could be $500,000+
• Employee benefits accounts subject to ERISA litigation
• Real estate-related E&O where property values create large underlying claims

CNA's Miscellaneous Professional Liability form and Markel's agency E&O policy both offer defense outside the limit as an option. Swiss Re/Westport's standard program typically uses defense inside the limit but offers defense outside the limit through its excess or specialty programs.

How Defense Costs Work in E&O Claims

When an E&O claim is filed against an agency, the carrier does not simply hand the agency a check. The carrier controls the defense. This is the duty-to-defend structure used by virtually every agency E&O carrier.

The Defense Cost Components

Attorney fees. Defense counsel for insurance E&O matters typically charges $250 to $600 per hour. Complex commercial E&O cases in major markets (New York, California, Texas) average $400 to $550 per hour. A 300-hour case - not unusual for a disputed E&O matter - generates $120,000 to $165,000 in attorney fees alone.

Expert witnesses. Insurance coverage disputes often require expert testimony on standard of care - what a reasonable insurance agent would have done in the same circumstances. Insurance coverage experts charge $3,500 to $7,500 per day for testimony and $250 to $500 per hour for preparation. A two-expert case adds $20,000 to $40,000 in expert costs.

Discovery costs. Document production, depositions, and e-discovery can add $5,000 to $25,000 per case. Agencies without well-organized files (including complete AMS documentation) incur higher discovery costs because producing records requires more attorney time.

Court costs and filing fees. Minor in total - typically $1,000 to $3,000 per case.

The Swiss Re/Westport 2024 Agency E&O Claims Report found that 62% of reported E&O claims were closed with defense-only costs (no indemnity payment). The average defense-only closure cost $18,400. The remaining 38% involved both defense and indemnity payments, with average total costs of $92,000.

That means for every 10 E&O claims, roughly 6 are defended successfully with no indemnity payment - but the agency still pays the retention on each, and those 6 defense events erode limits on a defense-inside-the-limit policy.

The Retention: What It Really Means

The retention on an E&O policy is frequently described as a "deductible," but the two concepts work differently. Understanding the difference affects how agencies should budget for E&O claim exposure.

Standard Insurance Deductible

On a standard P&C policy (auto, GL), the insurer pays claims above the deductible. The insured pays the deductible at the time of the loss, the insurer pays the rest, and the deductible is reimbursed by the carrier if the insured was not at fault (subrogation scenario).

E&O Policy Retention

On a professional liability policy, the retention operates differently in two critical ways:

First, the retention is typically not paid upfront. The retention is the amount the agency is responsible for in the ultimate resolution of each claim - not necessarily a payment at the outset. The carrier advances defense costs and then reconciles the retention against the ultimate settlement or judgment.

Second, some retentions apply only to indemnity; others apply to both defense costs and indemnity. This is the most important structural distinction beyond defense inside/outside the limit.

• Retention applies to indemnity only: The carrier pays defense costs from dollar one. The retention applies only to settlement amounts or judgments. This structure benefits the agency - it receives a full defense without out-of-pocket cost until settlement.
• Retention applies to defense + indemnity combined: The agency must fund the first $X in combined defense and indemnity costs. On a $5,000 retention, the agency funds the first $5,000 of attorney fees. Only after defense costs exceed $5,000 does the carrier begin paying. This structure can result in the agency paying multiple retention amounts in a policy year with multiple claims.

Per-claim vs. aggregate retention. Per-claim retention means the agency pays the retention amount on each claim, regardless of how many claims occur. Aggregate retention caps the total retention exposure in a policy year - the agency pays no more than the aggregate regardless of claim count.

On a policy with a $5,000 per-claim retention and three claims in a year, the agency's retention exposure is $15,000. If the same policy had a $10,000 aggregate retention, the exposure would be capped at $10,000.

Most Swiss Re/Westport agency E&O policies use per-claim retentions. Markel and CNA offer aggregate retention options on larger accounts. Aggregate retention typically costs 5% to 10% more than per-claim but caps total out-of-pocket exposure in a bad year.

Duty to Defend vs Reimbursement Policies

The duty-to-defend structure and the reimbursement structure are found in the insuring agreement of the E&O policy. They determine who controls the defense and who pays attorney fees upfront.

Duty to Defend

In a duty-to-defend policy, the carrier has both the right and obligation to defend the agency against covered claims. The carrier selects defense counsel (from a panel or approved list), instructs counsel, approves settlement decisions, and pays attorney fees directly to the law firm. The agency is obligated to cooperate but does not control the defense.

Agency E&O is almost universally duty-to-defend. Swiss Re/Westport, CNA, and Markel all use duty-to-defend language in their standard agency E&O forms.

The carrier's right to control defense means the agency cannot simply hire its personal attorney and bill the carrier. Unauthorized defense expenses are typically not reimbursed. If the agency wishes to hire its own "monitoring" counsel to observe the carrier's defense, that cost is the agency's own expense unless the policy specifically allows and covers it.

Reimbursement Policies

Reimbursement-based professional liability policies (more common in D&O and some higher-end media liability programs) require the insured to fund the defense upfront and submit for reimbursement. The insured controls counsel selection. The carrier reviews invoices and reimburses.

Reimbursement structures benefit sophisticated insureds who want control over their defense. They are uncommon in agency E&O. An agency that encounters a reimbursement-based E&O policy should evaluate whether the premium savings justify the cash flow burden of funding defense costs while awaiting reimbursement.

Notary E&O and Defense Costs

Notaries public carry a distinct form of professional liability coverage called notary E&O. This coverage addresses errors in the notarization process - notarizing a document without proper ID verification, notarizing when the signer was not present, or failing to complete the notarial certificate properly.

Defense cost structure for notary E&O. Notary E&O policies almost universally use defense inside the limit. Limits are low - typically $25,000 to $100,000 - and defense costs for notary claims are correspondingly modest. A disputed notarization case that goes to court typically generates $3,000 to $8,000 in defense costs, well within even low limits.

Who offers notary E&O. Great American Assurance Company, NNA (National Notary Association) through its member program, and Travelers all offer notary E&O. Premiums are low - $75 to $250 per year for individual notaries.

Retention on notary E&O. Most notary E&O policies have $0 retention. The carrier pays all defense and indemnity from dollar one. This is a function of the low average claim size - retention structures are not economically necessary.

Agency-as-notary. When an insurance agency employee performs notary services in connection with agency business (notarizing policy-related documents for clients), the notary function may be covered as a professional service under the agency's E&O policy. Coverage is not guaranteed - the agency E&O application typically asks whether notary services are provided. Confirming this coverage exists, rather than assuming it, prevents a gap.

Prior Acts Coverage and Defense Costs

Prior acts coverage - coverage for claims arising from errors made before the current policy period - affects defense costs directly. When a claim involves a prior acts error, the carrier defending the claim under the current policy must trace the error back to confirm it occurred after the prior acts date.

The investigation of a prior acts issue adds discovery costs. The carrier must review historical policy files, prior-year quotes, and the client relationship history to establish when the error occurred. This is not trivial - it typically adds $5,000 to $15,000 to defense costs in complex cases.

Agencies with full prior acts coverage (prior acts date tracing back to the agency's founding) face this issue less frequently than agencies with recent or restricted prior acts dates. A restricted prior acts date creates more frequent coverage disputes at the outset of a claim, which inflates early defense costs before coverage is even confirmed.

Choosing the Right Defense Structure for Your Agency

BrokerageAudit and E&O Risk Reduction

Coverage gaps at renewal are the leading category of agency E&O claims, generating the defense costs that make the structure decisions above financially meaningful. BrokerageAudit's Policy Checker compares policy terms year-over-year at renewal and flags coverage reductions before the client accepts the new policy. An agency that catches a sublimit reduction or dropped endorsement before renewal rather than after a loss eliminates the claim entirely - and eliminates the defense cost exposure that comes with it.

For related coverage, see our guides on E&O policy selection factors and how to compare E&O markets at renewal.

Frequently Asked Questions

What is the difference between defense inside and defense outside the limit in E&O insurance?

Defense inside the limit means attorney fees and defense costs reduce the indemnity limit available for settlement. If the policy has a $500,000 occurrence limit and the carrier spends $80,000 on defense, only $420,000 remains for indemnity. Defense outside the limit means the carrier pays defense costs separately from the indemnity limit. The full $500,000 remains available for settlement regardless of defense expenditure. Agencies with higher-value accounts or complex commercial risks should insist on defense outside the limit.

What does the retention mean on an E&O policy compared to a regular deductible?

The retention on an E&O policy is the insured's financial responsibility per claim. Unlike a standard deductible, the retention is often not paid upfront - it is reconciled at resolution. Some retentions apply to defense costs and indemnity combined; others apply only to indemnity. Per-claim retentions apply to each claim independently. Aggregate retentions cap total retention exposure in a policy year. The structure determines whether an agency with multiple claims in one year pays multiple full retentions or a capped total.

How much does notary E&O insurance cost?

Notary E&O insurance through the National Notary Association costs $75 to $200 annually for individual notaries with $25,000 to $100,000 in coverage. Travelers and Great American offer standalone notary policies in the same range. Most notary E&O policies include $0 retention and defense inside the limit - the low claim severity makes both features economically reasonable. Agency employees who perform notary services should confirm whether the agency's E&O policy covers notary activities as a professional service or whether a separate notary policy is needed.

Does an agency E&O policy cover the cost of defense even if no indemnity is paid?

Yes, on a duty-to-defend policy. The carrier has the obligation to defend the agency against covered claims, including meritless claims, through the full litigation process. Defense costs are paid even when the case is dismissed or successfully defended with no indemnity payment. On a defense-inside-the-limit policy, those defense costs still reduce the available occurrence limit. On a defense-outside-the-limit policy, they do not erode the indemnity available.

What is a duty-to-defend policy vs a reimbursement policy in E&O insurance?

A duty-to-defend policy gives the carrier both the right and the obligation to select defense counsel and control the defense of covered claims. The carrier pays attorney fees directly. The agency cooperates but does not control defense strategy. A reimbursement policy requires the insured to fund defense upfront, control counsel selection, and submit expenses for reimbursement. Agency E&O is almost universally duty-to-defend. Reimbursement structures are more common in D&O and specialty media liability.

How does prior acts coverage affect defense costs in an E&O claim?

When a claim involves an error that may have occurred before the current policy period, the carrier must investigate when the error happened to determine whether it falls within the prior acts date. This investigation adds $5,000 to $15,000 in early defense costs. Agencies with full prior acts coverage (retroactive date tracing back to founding) face fewer prior acts disputes than agencies with restricted retroactive dates. A gap in prior acts coverage can result in the carrier disputing coverage for claims in litigation, effectively abandoning the defense mid-stream.

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Written by Javier Sanz, Founder of BrokerageAudit. Last updated April 2026.

Reduce the coverage gaps that generate E&O claims. BrokerageAudit's Policy Checker flags coverage reductions at renewal before the client accepts the new policy, eliminating the claim exposure before it becomes a defense cost problem. Explore Policy Checker