VA Disability Rating: How Your Percentage Is Calculated

The VA assigns your disability percentage by combining the ratings for each service-connected condition using a special formula, not by simple addition. You receive a single percentage from 0% to 100% in 10% increments, which determines your monthly compensation. The key is understanding the “whole-person” concept and the VA’s Combined Ratings Table.

Formula

The VA uses a descending efficiency formula. Start with your highest rating, subtract it from 100% to find your remaining “able” percentage, then multiply that by the next rating. Add the result to the first rating. Repeat for each additional condition, always using the new combined total as the base.

Symbolically, for two conditions:

Combined = R1 + (100 – R1) × R2 / 100

Where:

• R1 = highest individual rating (percent)
• R2 = second highest individual rating (percent)

For three conditions, apply the formula again using the result from the first step as the new R1. The final number is rounded to the nearest 10% (e.g., 55% becomes 60%, 54% becomes 50%).

Worked Example

Using the calculator defaults: Condition A = 50%, Condition B = 30%, Condition C = 10%.

1. Start with the highest: 50%.
2. Remaining able: 100 – 50 = 50%.
3. Apply B: 50% of 50 = 25. Add to 50 → 75%.
4. Remaining able: 100 – 75 = 25%.
5. Apply C: 10% of 25 = 2.5. Add to 75 → 77.5%.
6. Round to nearest 10% → 80%.

The calculator gives 80% for these inputs, matching the manual calculation.

Why the VA Doesn’t Simply Add Percentages

If you had three 50% disabilities, simple addition would give 150%, which is impossible. The VA’s formula assumes each condition reduces your remaining efficiency, not your original whole self. This means the first condition has the biggest impact, and each subsequent one has a smaller effect. The result is that a veteran with many moderate conditions may never reach 100%, even if the sum of their ratings exceeds 100%.

For example, ten conditions each rated 10% combine to about 65%, not 100%. This frustrates many veterans, but it is the intended design of the system.

How to Read Your Combined Rating

Your combined percentage determines your monthly compensation amount. The VA publishes a compensation table each year; for 2024, a 10% rating with no dependents pays about $171, while a 100% rating pays about $3,737. With a spouse, children, or parents, additional amounts are added. The percentage also affects eligibility for other benefits like vocational rehabilitation, but it does not directly affect medical care—all enrolled veterans receive VA healthcare regardless of rating.

Remember that the combined rating is not the same as your “total disability”—a 100% rating means you are considered totally disabled for compensation purposes, even if you can work.

Common Mistakes and Misconceptions

• Adding percentages: The most common error. Always use the combined formula.
• Rounding early: Round only at the end. Intermediate rounding changes the final result.
• Ignoring bilateral factors: Conditions on both arms or legs get a 10% bonus before combining. For example, two 10% ratings on opposite arms combine to 21% (10 + 10×0.1), then that 21% is used in the main formula.
• Assuming 60% + 60% = 100%: Actually, two 60% ratings combine to 84%.
• Thinking a 0% rating means “no disability”: A 0% rating means the condition is service-connected but not severe enough for compensation. It still qualifies you for healthcare and future increases.

Limits of the Formula

The formula only works for conditions that are already rated. It does not account for:

• Individual unemployability (TDIU): If you can’t work due to service-connected conditions but your combined rating is below 100%, you may qualify for TDIU, which pays at the 100% rate.
• Special monthly compensation: For loss of use of limbs, blindness, or other severe conditions, you may receive additional amounts beyond the percentage.
• Permanent and total status: Some 100% ratings are considered permanent, exempting you from future reexaminations.

The formula also assumes each condition is independent, which is not always true. The VA may combine symptoms from related conditions into one rating, so the order of your rated conditions matters.

Frequently Asked Questions

Can I get a 100% rating with multiple conditions?

Yes, but it requires a combination that reaches at least 95% before rounding. For example, 60% + 60% = 84%, and adding a 50% gives 92%, then a 30% gives 94.4%, which rounds to 90%, not 100%. You would need additional ratings to push past 95%.

What is the bilateral factor?

The VA adds 10% to the combined value of conditions affecting both arms, both legs, or paired skeletal muscles before combining with other conditions. For instance, two 10% ratings on opposite knees become 21% instead of 19%, giving a small boost.

How often does the VA re-evaluate my rating?

It depends. Ratings for conditions expected to improve may have a future exam date (usually 2-5 years). Ratings for static conditions are considered permanent and not re-examined. If your condition worsens, you can file for an increase at any time.

Does my age or ability to work affect my percentage?

No, the percentage is based solely on the severity of your service-connected conditions. However, if you are unable to work due to those conditions, you can apply for TDIU, which pays at the 100% level even if your combined rating is lower.

What if I disagree with my rating?

You can file a supplemental claim with new evidence, a higher-level review, or an appeal to the Board of Veterans’ Appeals. You have one year from the decision date to file. Many veterans work with a Veterans Service Officer (VSO) for free help.

Related

• High Density Colocation: What It Is & How It Works
• Seaweed Fibres for Jackets: How Alginate Becomes a Material
• Cement Stock Metrics: Key Ratios & Drivers

in a | Condition A rating | % | 50 | 0
in b | Condition B rating | % | 30 | 0
in c | Condition C rating | % | 10 | 0
out combined | Combined rating | % | round((a + (100 - a) * b / 100) + ((100 - (a + (100 - a) * b / 100)) * c / 100), 0) | 0