Oregon Revised Statutes Public Officers and Employees § 243.460

(1) The amount by which an eligible state employee's salary is reduced under ORS 243.440 shall continue to be included as regular compensation for the purpose of computing the retirement, pension and Social Security benefits earned by the employee. If the amount is deferred on a pretax basis, the amount shall not be considered current taxable income for the purpose of computing federal and state income taxes withheld on behalf of the employee.

(2) The state deferred compensation plan established by ORS 243.401 to 243.507 supplements all other retirement and pension systems established by the State of Oregon, and participation by an eligible state employee in the state deferred compensation plan shall not cause a reduction of any retirement or pension benefits provided to the employee by law.