Loss Run Vs Claims History: What Underwriters Compare And Why It Matters

Loss Run A record of prior insurance claims and losses, commonly requested during underwriting or renewal. Insureds and carriers often use the term interchangeably with claims history, but there are practical distinctions: a loss run is a carrier-generated summary report for a policy’s claims, whereas claims history can include detailed claim files, court judgments, and third-party loss data that underwriters may review in addition to the loss run.

Understanding the difference helps brokers present the strongest possible placement case. A loss run delivers a concise, carrier-verified ledger; claims history is broader and can reveal additional context — for example, litigation outcomes or external judgments not yet reflected in reserves. Underwriters will usually rely on loss runs as the baseline but will want access to claim files or loss details when patterns, severity, or subrogation issues appear.

Key Differences Between A Loss Run And Claims History

The differences matter operationally and legally. Common distinctions include:

• Source: Loss runs are produced by insurers and reflect what the carrier has on record; claims history can come from multiple carriers, public records, or litigation databases.
• Detail Level: Loss runs summarize key fields; claim files include adjuster notes, medical reports, invoices, and correspondence.
• Timing: Loss runs capture the carrier’s current reserves and payments; claims history may update slower or include later judicial developments.
• Use Case: Loss runs are used in underwriting and quoting; claims histories are used for deeper investigations, subrogation, or contested renewals.

Why Underwriters Look Beyond The Loss Run

While loss runs are efficient, underwriters sometimes request claim files or external data to validate or challenge what appears in the loss run. Situations that trigger a deeper look include:

• Unusually Large Reserves: Large open reserves may indicate unresolved exposures — underwriters want adjuster notes and defense strategies.
• Frequent Recurrence: Multiple similar losses suggest a systemic control issue; photos and repair invoices can confirm cause.
• Possible Under-Reporting: If incident descriptions are vague, additional documents clarify operational or legal risks.
• Litigation Or Subrogation: If a claim involves active litigation, court filings or settlement documents influence final cost estimates.

How Brokers And Risk Managers Reconcile The Two

Brokers should treat loss runs as the starting point and proactively assemble supporting claim files for any material items. Best practices include:

• Attach Summaries: For each large or recurring claim, include a one-page summary with cause, corrective actions, and final disposition (if closed).
• Confirm Recoveries: Show evidence of subrogation or salvage that reduced net loss amounts.
• Provide Operational Context: If a loss was due to a process that’s been changed, include the new SOP, training records, or inspection logs.
• Request Carrier Certification: Ask incumbent carriers to certify loss runs are complete for the policy period to avoid surprises later.

Practical Consequences For Pricing And Placement

Differences between loss runs and full claims histories often drive negotiation points. A clean loss run with substantiated claim files can secure better market terms than an account with inconsistently documented recoveries or large unresolved reserves. Conversely, an insurer that finds undeclared third-party judgments not reflected in the loss run may re-rate, add exclusions, or withdraw the offer.

Dealing With Discrepancies

If a broker or insured finds errors between the loss run and claim files, take these steps:

• Document The Error: Collect evidence and specify which line items are incorrect.
• Request Correction: Submit a written request to the carrier asking for a corrected loss run; include claim numbers and supporting documents.
• Escalate If Necessary: If the carrier does not respond, file a complaint with the state insurance department or ask the broker to engage the carrier’s claims manager.

In short, the Loss Run is a concise, carrier-issued snapshot of prior claims that underwriters use as the primary underwriting ledger. Claims history is broader and deeper; reconciled together, they give the full picture that shapes pricing, terms, and the decision to bind coverage.