VA Combined Disability Rating Explained: Why 50 + 30 + 20 Equals 70, Not 100

VA Combined Disability Rating Explained

Many veterans are surprised by their first decision letter: three ratings of 50, 30 and 20 percent, and a combined rating of 70, not 100. The VA is not making an error. It uses a method called combined ratings, and once you see it, the numbers make sense. The VA Disability Combined Rating Calculator does the arithmetic for you and turns the result into a monthly payment.

The whole-person idea

The VA imagines a person who is 100 percent healthy. Each rating removes a share of that whole. Because the second condition can only affect what is still healthy, the ratings do not simply add up. The method is always the same:

1. Sort the ratings from highest to lowest.
2. Start with the highest.
3. Apply each next rating to the part of the person that is left, and add the points.
4. Round to a whole number at each step and round the final number to the nearest 10.

Step by step with 50, 30 and 20

Start with 50. Fifty points of the person are still unaffected, and 30 percent of 50 is 15, so the running total becomes 65. Now 35 points are left, and 20 percent of 35 is 7, so the total is 72. Rounded to the nearest 10, the combined rating is 70 percent. Notice that the order matters only in the sense that you begin with the largest rating; the VA does this to keep results consistent.

Rounding

A combined value of 74 becomes 70, and 75 becomes 80. That means one small increase in a single rating can sometimes push the total across a rounding line, while a different increase of the same size does nothing. The calculator shows both the exact combined value and the rounded rating so you can see how close you are to the next step.

The bilateral factor

If both arms, both legs or both hands are service-connected, the VA treats them in a special way. The ratings of the paired limbs are combined with each other first, then 10 percent of that result is added, and the sum is handled as one additional disability. For example, 20 and 10 on the two legs combine to 28; 10 percent of 28 is 2.8, giving 31 after rounding. Enter the paired ratings in the second box and the calculator does these steps for you.

From rating to monthly payment

The rounded rating selects a row in the compensation table. Ratings of 10 and 20 percent pay the same amount regardless of family. From 30 percent, the amount rises when you have a spouse, children under 18, children over 18 in school or dependent parents. At 70 percent, the 2026 rate is $1,808.45 for a veteran alone and $1,961.45 with a spouse. A second child under 18 adds $76 at that level. The table in the tool uses the rates effective December 1, 2025, and each cell is editable, so you can update it after the next cost-of-living increase.

What the calculator does not include

Special monthly compensation, individual unemployability, the clothing allowance, retroactive back pay and state benefits are outside the estimate. The VA decides every rating, and your decision letter is the only authority on your case.

Using it to plan

Try a "what if" by adding a pending claim to the list and see whether it would raise the combined rating. If the exact value is, say, 64, a small additional rating might push it to 65 and round up to 70, which matters for pay. Save one version as a scenario, change the ratings, save another, and compare the monthly amounts side by side. Everything stays in your browser.

Common mistakes

• Adding ratings together. They never add.
• Forgetting that the bilateral value joins the list as one extra rating.
• Reading the "exact" value as the rating. Only the rounded figure counts.
• Using last year's payment table. Check the effective date.

This page is educational and not legal advice; the VA makes all decisions about ratings and pay.