Demystifying "VA Math"
If you have multiple service-connected disabilities, the Department of Veterans Affairs does not simply add the percentages together (e.g., 50% + 30% does NOT equal 80%). Instead, they use a formula known as the Whole Person Concept. Our VA Disability Calculator automatically applies these exact rules to give you your true combined rating.
Understanding your final compensation percentage is a crucial step in financial planning. If you are budgeting based on your expected monthly VA payout, you may also find our Paycheck Calculator helpful for analyzing your other income sources.
The Whole Person Concept
The VA assumes you start as a 100% efficient, healthy person. Each disability reduces your remaining efficiency.
For example, if you have a 50% disability and a 30% disability:
- Step 1: Your highest rating is 50%. You are now 50% disabled and 50% healthy.
- Step 2: Your next rating is 30%. The VA takes 30% of your remaining 50% health. (30% of 50 = 15).
- Step 3: Add 15 to your original 50. Your exact combined rating is 65%.
- Step 4: The VA rounds 65% up to the nearest 10%. Your final compensation rating is 70%.
Why is it so hard to get to 100%?
Because VA math takes a percentage of your remaining health rather than your total health, every additional rating adds less and less to your overall combined score.
For instance, if you are currently rated at 90%, and you receive a new 10% disability rating, the VA takes 10% of your remaining 10% health (which equals exactly 1). Your new exact score becomes 91%, which still rounds down to 90%.
For a complete breakdown of the legal guidelines and the Combined Ratings Table, you can reference the official 38 CFR ยง 4.25.