Ask your authorized treating physician to give you a disability rating or whole person rating. This rating reflects the percentage of your whole person affected by the permanent disability. It is based on the impairment level caused by the disability and which body parts are affected. Each state has its own rules regulating disability ratings. For instance, in Oregon, it is governed by Oregon Revised Statute 656.726.
Multiply your disability rating by 400. This was a number set by the legislature when the permanent partial disability formula was enacted into law. If you have a disability rating of 10 percent, the result would be 40. This is your adjusted disability rating.
Calculate your average weekly wage before the accident, and multiply it by 0.667. This is two thirds of your average weekly income. If your weekly income was $400, then your result would be $266.80.
Write down your age and education factor. The way this is calculated varies by state. In Oregon, for instance, anyone age 40 or older receives an age factor of one, and everybody else receives a zero. This is added to your education factor, which ranges from zero for workers without a high school diploma or a GED to five for workers with special vocational training.
Multiply your adjusted disability rating by your adjusted weekly income. Multiply that by your age factor. For instance, if you have a disability factor of 10 percent, an adjusted weekly income of $266.80 and you are 40 years of age without any secular education, you would have a permanent partial claim of $10,672.