The Theory is that if someone is on Social Security Disability they are 100% disabled, SIF only takes credit for the percentage of pre- existing disability as SIF already took a credit for the subsequent industrial disability. No offset for Social Security Retirement so that at the retirement age (see attached), the Social Security Disability offsets stop accruing.

Prior Awards: There is net credit for pre-existing disability payments. The credit is for the net permanent disability recovery to applicant after legal fee. There is no credit for the medical portion of prior C&R. However, if not broken down in the C&R by a stamen, the disability portion, SIF will claim credit for the whole C&R.

Disability Pension: SIF is entitled to will claim credit similar to SSDI Social Security Disability as a percentage of SSDI that is related to the pre-existing PD. The formula is (Overall disability % (combined pre-existed PD and Subsequent injury PD) Less  Industrial % of disability = Offset % Multiplies Social Security Disability Monthly Amount = Offset Amount.   (Combined % – WC PD = % x SSDI benefits = offset). The SSDI credit will end once the worker reaches retirement age and the SSDI benefit converts to retirement benefits. Calculating the Social Security credit can be rather complex. To properly assess the credit four things need to be known: