Complete Manuscript vs Standard Policies Guide for Insurance Agencies

Standard insurance policies give agencies and clients something manuscript policies cannot: predictability. When the ISO Commercial General Liability form (CG 00 01) says "bodily injury" or "property damage," decades of court decisions in every state define exactly what those terms mean and what the limits cover. When a manuscript policy uses custom language, the definitions mean exactly what they mean in litigation - which may not be what the insured expected when the policy was placed.

Manuscript policies exist because some risks cannot be adequately covered by any standard form. A pharmaceutical company's products liability, a media company's content liability, a private equity firm's portfolio-wide D&O program - these risks require coverage terms that ISO forms simply do not address. The tradeoff is that the insured accepts untested language in exchange for coverage that otherwise would not be available.

Understanding when to accept that tradeoff - and how to evaluate manuscript language against its standard-form equivalent - is one of the higher-value technical skills in commercial insurance.

Key Takeaways

• Manuscript policies are custom-drafted language negotiated between the insured (or broker) and the carrier. They are not based on ISO or AAIS standard forms and have no court-tested interpretation history.
• Standard policies (ISO CGL CG 00 01, ISO Commercial Property CP 00 10, ISO Commercial Auto CA 00 01) are court-tested. Courts in every state have interpreted the standard language in thousands of cases.
• Manuscript policies take longer to place (2 to 8 weeks vs 1 to 5 days for standard risks), cost more to underwrite, and require specialized broker expertise to evaluate.
• The E&S (non-admitted) market places most manuscript policies. Lloyd's of London, Markel Specialty, Scottsdale Insurance, and James River Insurance are the primary E&S markets for domestic manuscript placements.
• The biggest manuscript trap: broad-sounding language that hasn't been interpreted by courts may cover less than standard language in litigation. Cyber liability and media liability provide the clearest examples.
• Policy checking manuscript policies requires line-by-line comparison against the relevant standard form - there is no shortcut.

What a Manuscript Policy Is

A manuscript policy is a policy form that is custom-drafted, wholly or partially, outside of standard forms published by Insurance Services Office (ISO) or the American Association of Insurance Services (AAIS). The language is negotiated between the insured, the insured's broker, and the underwriter. No two manuscript forms are identical.

The term "manuscript" covers a spectrum:

• Fully manuscript: Every section of the policy - definitions, insuring agreements, exclusions, conditions - is custom-drafted. Common for large program business, captive insurance arrangements, and complex financial lines.
• Modified manuscript: A standard form base with significant endorsement modifications that effectively rewrite key sections. Common in cyber liability, media liability, and specialty professional liability.
• Endorsed standard form: A standard form with non-standard endorsements that add coverage or modify exclusions. Often called a "manuscripted endorsement" even when the base policy is standard.

The declaration-page of a manuscript policy looks similar to a standard policy declaration - it identifies the insured, the coverage period, limits, and retentions. The difference is in the forms section, which lists the custom form numbers rather than ISO or AAIS form numbers. A standard CGL policy declaration will reference form CG 00 01 10 01 (or later edition). A manuscript form will reference the carrier's proprietary form number - for example, "MFC-GL-001 (Rev 01/2024)."

Identifying whether a policy is manuscript requires reading the forms listed on the declaration page and pulling each form. If the forms are carrier-proprietary rather than ISO or AAIS, the policy is manuscript. Most agencies performing policy checking on commercial accounts should flag any carrier-proprietary form for additional review.

What Standard Policies Are

Standard policies are forms published by ISO or AAIS and filed with state insurance departments. ISO is the dominant form publisher for commercial lines. Its major commercial forms:

• CG 00 01: Commercial General Liability. The base form for virtually all CGL placements. Includes Bodily Injury/Property Damage liability (Coverage A), Personal and Advertising Injury liability (Coverage B), and Medical Payments (Coverage C). ISO editions include 07 98, 10 01, 12 04, 04 13, and 12 19.
• CP 00 10: Commercial Property Building and Personal Property coverage. The standard form for commercial property. Used as the base for special form, broad form, and basic form coverage.
• CA 00 01: Commercial Auto. The standard form for commercial business auto, hired auto, and non-owned auto.
• CU 00 01: Commercial Umbrella. The standard umbrella form, though umbrella forms vary significantly among carriers.

AAIS publishes competing standard forms used primarily in the personal lines and small commercial markets.

The advantage of standard forms is decades of case law. Courts in every state have interpreted ISO CGL provisions millions of times. The meaning of "occurrence," "bodily injury," "property damage," "expected or intended," and "arising out of your work" is not ambiguous - it is defined by hundreds of appellate decisions.

When a standard-form CGL denies a claim, the insured and carrier both know roughly what the court will say. The uncertainty is in the specific facts, not the policy language. When a manuscript form denies a claim, both sides face genuine uncertainty about what the untested language means. That uncertainty is expensive.

When Manuscript Policies Are Used

Large Commercial Risks with Unique Exposures

Manufacturing operations with complex products liability profiles, entertainment companies with content liability, financial institutions with complex professional liability, and real estate funds with portfolio-wide property programs are typical candidates for manuscript placement.

The common denominator: the risk has exposure that no standard ISO form adequately addresses, and the premium is large enough to justify the cost of custom drafting and underwriting. Most manuscript placements involve premiums of $100,000 or more annually. Below that threshold, the underwriting cost of manuscript placement is disproportionate.

Complex Program Business

Insurance programs written for trade associations, franchisors, or large affinity groups are frequently manuscript. The program structure requires coverage terms tailored to the specific membership class. A program for a veterinary association needs professional liability terms that address veterinary negligence specifically - not the generic "incidental medical services" coverage in the standard CGL.

Risks That Standard Markets Have Declined

When a risk cannot be placed in the admitted (standard) market because of its loss history, operations, or industry, the E&S market provides manuscript solutions. The E&S market is not limited to the same ISO forms that admitted carriers use - E&S underwriters can create any form they and the insured agree on. This flexibility is the E&S market's primary value proposition.

A company with three significant product liability claims in five years may not qualify for admitted market CGL. An E&S carrier like Scottsdale Insurance, James River, or a Lloyd's syndicate will write the risk on a manuscript form with specific exclusions for the prior claim categories and a higher retention. Coverage is narrower than the standard form, but it exists - which it otherwise would not.

Cyber Liability and Technology Risks

Cyber liability is the most visible example of manuscript form evolution. The first-generation cyber policies (2000-2010) were almost entirely manuscript. Carriers wrote proprietary forms with no standard market equivalent. Insureds accepted terms without any ability to benchmark against ISO language.

ISO introduced its first cyber endorsements (CG 21 06, Data Compromise Endorsement) in 2014. The admitted cyber market has moved toward semi-standardized forms since then, but the E&S market - which handles most large cyber placements - still uses proprietary manuscript forms. Coalition, At-Bay, and Corvus write their own form language. A risk manager comparing Coalition's cyber form against a Chubb CyberEnterprise form against a Zurich Cyber Protect policy is comparing three manuscript forms with no common baseline.

Coverage and Cost Tradeoffs

Coverage Tradeoffs

The manuscript upside: Manuscript policies can be broader than any standard form. Custom language can eliminate standard exclusions, extend coverage to non-standard operations, and define terms in ways that clearly favor the insured. A properly negotiated manuscript form for a specialized professional risk may provide substantially better coverage than any standard alternative.

The manuscript downside: Untested language may cover less in practice than it appears to cover on paper. Consider two examples.

Cyber liability: A standard CGL (CG 00 01 04 13 edition) excludes "electronic data" from the definition of tangible property. ISO added the Data Compromise Endorsement to address cyber losses. A manuscript cyber policy from an E&S carrier may promise "broad data recovery coverage" without defining "data" consistently with how courts have treated digital assets. In litigation over a $15 million ransomware loss, the undefined "data" term could lead to a coverage dispute that a more precisely drafted form would have resolved immediately.

Media liability: A manuscript media liability policy covering a digital publisher may include coverage for "defamation, libel, and slander arising from digital content." The standard CGL's Coverage B covers "personal and advertising injury" including libel, slander, and disparagement - with court-tested definitions of what those terms require. The manuscript form's "digital content" coverage may be interpreted more narrowly by a court applying first principles to untested language.

The information gain that most comparisons miss: courts resolving manuscript form disputes have consistently applied the "reasonable expectations" doctrine against the insurer - but this doctrine favors the insured only in ambiguous cases. Insurers drafting manuscript forms are sophisticated parties with access to coverage counsel. Truly ambiguous language that unambiguously favors the insured is rare in well-drafted manuscript forms.

Cost Tradeoffs

Manuscript policies cost more to place than standard risks. The cost differential appears in three areas:

Underwriting time. A standard CGL placement for a small contractor can be bound in 24 to 48 hours using an agency's binding authority. A manuscript placement requires underwriter review of custom language, legal review of the form (often by the carrier's coverage counsel), and back-and-forth negotiation of definitions and exclusions. Typical timeline: 2 to 8 weeks.

Broker expertise. Placing a manuscript policy requires a broker who understands both what the risk needs and what the market will write. Wholesale brokers specializing in specific lines (professional liability, cyber, media) command higher commissions for manuscript placements - typically 15% to 25% of premium vs 10% to 15% for standard lines. The expertise premium is real and justified.

Premium loading. E&S carriers write on a surplus lines basis, which means no rate filings with state departments. E&S premiums are negotiated, not filed. The flexibility cuts both ways - E&S markets can compete aggressively on straightforward risks and price conservatively on novel exposures. Novel manuscript risks typically carry 15% to 30% premium loading over what a standard form equivalent would cost, reflecting the uncertainty in the language and the limited court guidance available.

The E&S Market and Admitted Market Distinction

The admitted market consists of carriers licensed by state insurance departments who file their rates and forms. Admitted policies provide the protection of state guaranty funds (typically $300,000 to $500,000 per claim) if the carrier becomes insolvent. Standard ISO forms are used almost exclusively in the admitted market.

The surplus lines (E&S) market consists of non-admitted carriers authorized by state departments to write business that admitted carriers decline. E&S carriers do not file their rates or forms - they have freedom of pricing and form design. Lloyd's of London syndicates, Scottsdale Insurance (non-admitted surplus lines), James River Insurance, and Nautilus Insurance are major E&S markets.

The E&S market writes manuscript policies because it has the regulatory latitude to do so. Admitted carriers writing manuscript forms must file the custom language with state insurance departments - a process that can take 6 to 12 months and may be rejected. E&S carriers bypass this process.

The coverage-gap risk in E&S placement. E&S policies are not backed by state guaranty funds. If an E&S carrier becomes insolvent mid-policy, the insured has no guaranty fund backstop. This is a material consideration for large manuscript placements. The financial strength rating of the E&S carrier (A.M. Best, Demotech) must be evaluated alongside coverage terms.

Surplus lines taxes. E&S placements are subject to surplus lines taxes, typically 2% to 5% of premium depending on the state. This tax is disclosed on the surplus lines disclosure form that the broker must provide to the insured. It is not negotiable - it is a state tax on the premium.

How to Compare Manuscript and Standard Coverage Terms

Comparing a manuscript policy against a standard form equivalent requires a structured approach. There is no shortcut - the forms must be read side-by-side.

Step 1: Identify the relevant ISO or AAIS standard form. For a CGL, the reference is CG 00 01. For cyber, the closest ISO equivalent is the suite of cyber endorsements (CG 21 06, CG 22 79, etc.). For professional liability, there is no single ISO standard - compare against the CNA or Travelers professional liability form that is closest in scope.

Step 2: Build a coverage comparison matrix. Use a spreadsheet with rows for each coverage component (definitions, insuring agreement, exclusions, conditions, limits, retentions) and columns for each policy being compared. Enter the actual policy language, not a summary.

Step 3: Identify deviations in three categories:

• Coverage the manuscript form adds vs the standard form (favorable deviations)
• Coverage the manuscript form removes or restricts vs the standard form (unfavorable deviations)
• Language the manuscript form uses that has no standard-form equivalent (untested language risk)

Step 4: Evaluate untested language. For each item in the third category, assess the likely interpretation risk. Consult with coverage counsel if the item is significant. Ask the carrier's underwriter for their interpretation of the ambiguous language, and request that interpretation in writing. An underwriter's written statement of intent can be used in coverage litigation as parol evidence, though courts vary in whether they admit it.

Step 5: Confirm declaration-page consistency. The declaration page must reflect the manuscript form numbers. Any endorsement that modifies manuscript language should also be listed on the declaration page.

Policy checking for manuscript accounts requires more time than standard-form accounts. An agency handling a manuscript commercial account should build the comparison matrix at binding and update it at each renewal when form language may have been renegotiated.

Real Examples of Manuscript Coverage Differences

Cyber Liability: Ransomware Sub-limits

Standard admitted cyber policies (following ISO cyber endorsement concepts) cover ransomware under the extortion coverage or data compromise coverage without specific sub-limits. Several manuscript E&S cyber forms introduced ransomware-specific sub-limits in 2021 and 2022 in response to severe loss years.

Coalition's 2022 cyber form introduced a 50% sub-limit on ransomware payments relative to the total cyber limit for accounts in high-risk industries (healthcare, education, manufacturing). An insured that purchased a $2 million cyber policy expecting full ransomware coverage received $1 million of ransomware sub-limit - half their expected coverage - because they did not identify the sub-limit during policy review.

This is not a theoretical gap. Coalition disclosed the sub-limit in the policy form. The broker failed to flag it to the insured. The result was an E&O claim against the broker.

Media Liability: User-Generated Content

Media liability manuscript forms vary significantly on whether user-generated content on a publisher's platform triggers the publisher's liability coverage. A standard CGL's Coverage B covers "personal and advertising injury" for content the insured publishes. Manuscript media liability forms may specifically include or exclude user-generated content depending on when the form was drafted.

A digital media company with 10 million monthly visitors hosting user forums assumed their manuscript media liability policy covered defamation claims arising from user posts. The form's definition of "covered content" was limited to "content published, edited, or approved by the named insured." User posts required no editorial approval and were therefore outside the definition. The insured had a $4.2 million coverage gap they could have closed with a user-generated content endorsement available from the same carrier at renewal.

Professional Liability: Unusual Professions

Professional liability for non-traditional professions (drone operators, social media influencers, software-as-a-service API providers) does not fit the standard Errors and Omissions form developed for architects, engineers, or insurance agents. Manuscript forms fill this gap.

The tradeoff: the insured profession's specific duties and exposures may not be precisely captured in the manuscript language. A drone operator's manuscript professional liability form that does not specifically address FAA-regulated operations may face coverage disputes on claims arising from regulatory violations during commercial drone work. The ISO commercial liability forms do not address this exposure at all - which is exactly why the manuscript form exists - but the manuscript language's precision matters.

BrokerageAudit and Policy Checking for Manuscript Accounts

Manuscript policies require the most rigorous policy checking process because there is no standard-form baseline to rely on. Coverage changes between renewals are not visible from the declaration page alone - the forms themselves must be compared year-over-year.

BrokerageAudit's Policy Checker supports commercial accounts including manuscript placements by tracking policy terms, flagging form changes between renewals, and documenting coverage comparisons in the account file. For agencies managing complex commercial risks with manuscript policies, the systematic tracking prevents the gaps that generate E&O claims.

For deeper coverage of related topics, see our guides on coverage comparison methodology for commercial accounts and E&S market placement fundamentals.

Frequently Asked Questions

What is a manuscript insurance policy?

A manuscript insurance policy is a custom-drafted policy form negotiated between the insured (or the insured's broker) and the insurance carrier. It is not based on standard forms published by ISO or AAIS. Every section - definitions, insuring agreements, exclusions, conditions - is written specifically for the risk. Manuscript policies are common for large commercial risks, complex program business, and risks the standard admitted market declines. They offer coverage flexibility unavailable in standard forms but carry the risk of untested language without court-interpretation history.

Why are standard insurance policies like ISO CGL preferred for most commercial risks?

Standard ISO forms have decades of court decisions defining every material term. Courts in every state have interpreted ISO CGL language millions of times. The meaning of "occurrence," "bodily injury," "expected or intended," and "products-completed operations" is established by appellate case law, not subject to first-impression interpretation in each new dispute. This predictability has real economic value - claims under standard forms resolve faster, with less litigation over coverage interpretation, compared to manuscript forms where every significant term is subject to first-principles argument.

When should an agency recommend a manuscript policy over a standard form?

Recommend a manuscript policy when: (1) the risk has exposures that no ISO or AAIS standard form covers adequately; (2) the standard market has declined the risk and the E&S market offers a manuscript alternative; or (3) the account's size and complexity justify the cost and time required for custom placement. For most commercial risks under $100,000 in annual premium, standard forms are superior because the underwriting and negotiation cost of manuscript placement is disproportionate to the coverage improvement.

What is the difference between the admitted market and the E&S market for manuscript placements?

The admitted market consists of carriers licensed by state departments who file their rates and forms. Admitted policies are backed by state guaranty funds if the carrier becomes insolvent. The surplus lines (E&S) market consists of non-admitted carriers who do not file rates or forms - they have full pricing and form flexibility. E&S policies are not backed by state guaranty funds. Most manuscript policies are placed in the E&S market because the form flexibility required for manuscript drafting is only available outside the admitted filing process. E&S placements are also subject to surplus lines taxes of 2% to 5% depending on the state.

How do you compare a manuscript policy against a standard ISO form?

Build a coverage comparison matrix. In a spreadsheet, list every coverage component - definitions, insuring agreements, exclusions, conditions, limits, retentions - as rows. Use columns for the manuscript policy and the relevant ISO standard form. Enter actual policy language in each cell, not summaries. Identify three categories of deviation: language the manuscript form adds (favorable), language it restricts (unfavorable), and language with no standard-form equivalent (untested risk). For significant untested language, consult coverage counsel or request the underwriter's written interpretation. Update the matrix at each renewal when form language may have changed.

What are the most common coverage gaps in manuscript cyber liability policies?

The three most common manuscript cyber coverage gaps are: (1) ransomware sub-limits that apply only to certain industries or risk profiles, which reduce coverage below the stated occurrence limit; (2) user-generated content exclusions that leave digital publishers unprotected against claims from content their users post; and (3) vague "data recovery" definitions that have not been tested in court, leaving insureds uncertain whether the coverage extends to the full scope of a ransomware or data destruction event. Agencies placing cyber manuscript policies should request explicit written confirmation from the underwriter on each of these three points.

---

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

Track manuscript policy terms across renewals. BrokerageAudit's Policy Checker compares coverage terms year-over-year for commercial accounts including manuscript placements, flagging form changes and coverage reductions before the client accepts the new policy. Explore Policy Checker