[[Actuarial Notes Wiki|Wiki]] / [[Exam 5 (CAS)]] / **Coinsurance Rating** ## Definition ==Coinsurance Rating== is the adjustment of rates when the policyholder shares in the loss through a coinsurance provision, similar to deductible rating. ## Formula ``` Coinsurance Rate = Base Rate × Coinsurance Factor Where factor < 1.0 due to reduced insurer cost ``` ## Related Concepts - [[Deductible Rating#Definition]] ## References - Werner & Modlin, Chapter 11