When a veteran has multiple service-connected conditions, each with its own individual rating, the Department of Veterans Affairs (VA) combines the ratings using VA math.
The VA does not simply add each individual rating together—they are combined using VA disability math. VA starts with the premise that a veteran is 100 percent efficient, or not disabled.
For example:
-If a veteran has a disability rating of 20 percent, VA will see them as 80 percent non-disabled and 20 percent disabled.
-If the veteran has another disability rating of 10 percent, VA will take 10 percent of the 80 percent non-disabled portion (i.e., 8 percent) and add it to the existing 20 percent rating, bringing the veteran to a 28 percent disability rating, which will be rounded to 30 percent.
This process continues for each of a veteran’s disability ratings.
It’s a bit confusing because it is not traditional math but I can assure you that your combined rating of —-% is accurate for your current claim’s ratings.