VA Disability Calculator

Using ‘VA Math’ to Combine Disability Ratings

When calculating combined disability ratings, the VA does not use regular math. Instead of simply adding up the percentage disability ratings for various conditions to reach a grand total disability rating, the VA takes percentages of percentages.

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VA Disability Benefits include tax-free monetary compensation and other benefits, depending on the VA Disability Rating. The VA’s calculations use a percentage of the Veteran’s remaining non-disabled percentage when adding the next disability percentage. For example, if a veteran had three disabling conditions rated at 30%, 20% and 20%, the VA would first apply the largest percentage, 30%.

To factor in the next percentage, it would not simply add 20 to 30 and get 50. Rather, it would apply the 20% to the Veterans remaining 70% of non-disability. The resulting 14% would be added to the current rating of 30%, creating a total of 44%. If these were the only two disabilities on hand, this would get rounded down and the Veteran would receive a total disability of 40%.

Next, the third disability rating, 20%, would be applied to the remaining 56% (100%-44%). This would result in an individual rating of 11%. This would then be added to the total of 44%, generating a total disability rating of 55%. This number would then be rounded up, producing the combined disability rating of 60%. “Normal” math would have reached a 70% disability rating instead.

If all of this seems more than a bit confusing to you, rest assured that you are not alone. That’s why we have provided the calculator above to help you get a better idea of how your disability ratings add up using VA math. Keep in mind that this tool should be used only to get a general idea of how disability ratings are combined.

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