The Special Guaranty provision of the Railroad Retirement Act (RRA) states that the total monthly benefits payable (including any vested dual benefits but excluding any supplemental annuity) to you and your family will not be less than the monthly amount which would be payable under the Social Security Act (SS Act) if railroad service after 1936 were credited as "employment" under the SS Act.
The Special Guaranty rate is referred to as an "increase" because the employee must be entitled to an RR Act employee annuity and the Special Guaranty rate must exceed the regular RRA formula rate to apply. There are two basic types of Special Guaranty computations - one type for disability annuitants with a disability freeze and one type based on the employee's age and railroad service.