Working Layer

A dollar range in which an insured or, in the case of an insurance portfolio, a group of insureds, is expected to experience a fairly high level of loss frequency. For many organizations, this loss frequency is adequate to provide some degree of statistical credibility to actuarial forecasts of the total expected losses during a specific period of time, e.g., 1 year. This is the layer typically subject to deductibles, self-insured retentions, retrospective rating, and similar programs.