Glossary

Loss Run Report

Also known as: Loss History Report

A carrier-generated report listing an insured's historical claims over a specified period — dates, causes, amounts paid and reserved, and claim status — used by underwriters to price and structure new or renewal coverage.

Loss runs are the primary underwriting tool insurers use to assess an applicant's actual claims experience rather than relying solely on property characteristics and stated risk management practices, and carriers typically request three to five years of loss history when quoting new coverage or a change of carrier. In an acquisition context, a buyer's insurance broker reviews the seller's loss runs during due diligence to identify patterns — recurring slip-and-fall claims suggesting a maintenance or design issue, repeated water damage suggesting plumbing or roof deficiencies, an open large claim that could affect future premiums — that inform both the pricing the buyer should expect and operational red flags worth investigating further. A materially adverse loss run (frequent claims, a large open claim, or an unusually high loss ratio relative to premium) can meaningfully increase premium quotes, tighten terms, or in severe cases limit which carriers are willing to quote the account at all, making loss run review a standard checklist item in CRE insurance and risk due diligence.