A line-of-business reference for P&C insurance carriers, MGAs, and TPAs evaluating modern policy administration software — how each standard line is structured, how it is rated, and how it runs inside the Mercury platform.
This P&C insurance knowledgebase is written for the teams at property and casualty insurance carriers, Managing General Agents (MGAs), and Third Party Administrators (TPAs) who are evaluating a modern policy administration and claims administration platform. It is a line-of-business reference, not a consumer guide.
Each article below explains one corner of the P&C market — what the line covers, how it is rated, the standard forms in use, and what a carrier or MGA needs from its core admin platform to write it profitably. It is written to be readable by anyone on the buying team: the CEO, the CIO, the chief underwriter, or the new analyst two weeks into the job.
Property and Casualty insurance (P&C) is the family of lines that pay for damage to insured property and for the insured's legal liability to third parties. Every line in this knowledgebase — auto, homeowners, renters, commercial auto, umbrella — is P&C.
Mercury is a P&C-first platform. That focus lets it model rating plans, underwriting rules, ISO forms, and claims handling in ways that generic policy software cannot. Start with What is Property and Casualty Insurance? for the working definition a new hire on the implementation team needs.
A P&C carrier's P&L is three numbers: premium earned, losses paid (plus reserved), and expense to acquire and administer the book. The combined ratio rolls them up into one figure. Every feature in a policy administration platform is, in the end, a lever on one of those three numbers.
Configurable rating and date-driven rate tables move premium. Straight-through processing and low-touch renewal move expense. Fraud analytics and fast cycle time move loss. Mercury is architected around those three levers.
A P&C platform is only useful if it models the specific lines the carrier writes. Auto rating does not look like homeowners rating. Commercial auto needs a fleet schedule and MVR pulls. Umbrella needs underlying-limit validation. An underwriting workflow that treats all lines identically quietly costs the carrier combined-ratio points every quarter.
The articles below document the line-of-business specifics the Mercury platform was designed around.
Who is this knowledgebase written for?
P&C insurance carriers, MGAs, TPAs, and program administrators evaluating policy administration and claims administration software. It is a line-of-business reference for buying teams and implementation teams, not a consumer education site.
How is this different from a consumer insurance glossary?
Every article ties the line-of-business content back to the configuration and workflow a carrier's policy administration system has to support — rating plans, ISO forms, endorsements, MVR pulls, underlying-limit checks, and claims administration — which is what the Mercury Policy and Claims Administration System delivers.
Does Mercury write every P&C line discussed here?
Mercury is a configurable P&C platform. Its rating engine, underwriting workflow, forms library, document imaging, portals, and claims administration are used by carriers and MGAs across personal and commercial P&C lines. The specific lines a given customer writes are defined by their product configuration.
