• An experience modifier is a factor developed by measuring the difference between an insured person’s actual past experience and expected or actual class experience. This factor can be either a debit or credit factor and will therefore increase or decrease the standard premium in response to past loss experience. When applied to a manual premium, the experience modification yields a premium that is more representative of the insured’s actual loss experience. An employer with average experience has a modifier of 1.0 and pays a premium for manual labor. Employers with less loss experience will have modifiers above 1.00 and will pay more than the manual allowance. Those with good experience will have modifiers below 1.00 and pay less than the manual premium.