How VA Combined Ratings Work

How VA Math Works In Plain English

The VA does not stack disability percentages by simple addition. Instead, it starts with the idea that a veteran is 100% efficient, applies the highest service-connected rating first, and then applies each additional rating only to what remains.

That is why a veteran with ratings of 50%, 30%, and 10% does not automatically receive a 90% combined rating. The VA math formula reduces the remaining efficient portion of the body with each step, then rounds the final total to the nearest 10% for the schedular rating.

If you are trying to understand whether the VA undervalued your conditions, start with the VA disability calculator and then compare the estimate against the 2026 compensation tables.

Step-By-Step Combined Rating Example

Here is a simple example using two common percentages:

1. Start with 100% efficiency.
2. Apply the 50% rating first, leaving 50% efficiency.
3. Apply the 30% rating to the remaining 50%, which equals 15%.
4. Add that 15% to the original 50% for a raw combined value of 65%.
5. Round 65% to the nearest 10%, which becomes 70%.

The same logic applies when there are more conditions. Every new percentage affects a smaller remaining base, which is why even strong individual ratings can combine into a lower overall result than most veterans expect at first glance.

Common Mistakes Veterans Make With Combined Ratings

• Assuming separate ratings should be added together without VA math.
• Forgetting that bilateral factor issues or secondary conditions may change the overall picture.
• Looking only at the payment amount without checking whether each underlying condition was rated correctly.
• Missing the connection between a low combined rating and a possible rating increase or appeal opportunity.

Veterans also miss that a low rating on one condition can pull down the combined outcome even if the overall symptom picture has worsened. That is one reason it helps to review the full decision rather than only the final percentage.

What To Do If Your Estimate Looks Higher Than Your Decision

If the calculator or your manual VA math estimate suggests a higher combined rating than what the VA assigned, the right next step depends on why the current decision came out low.

• Review the decision letter to confirm the VA listed every service-connected condition and percentage correctly.
• Gather updated treatment records if one or more conditions have worsened.
• Evaluate whether a supplemental claim, higher-level review, or other appeal path makes more sense.

If your issue started with a denial or a clearly low rating, review our guide to what to do after a VA claim denial or contact Ivery Federal Law through the contact form for a case review.

VA Combined Ratings FAQ