VA Math: Why Two 50% Ratings Don't Equal 100%

The short version

The VA does not add your disability ratings straight up. It uses a whole-person method and a combined ratings table, so two 50% ratings combine to 80%, not 100%. Each new rating applies only to the part of you the VA still counts as healthy, then the final number rounds to the nearest 10. That is why your combined rating is often lower than the sum of the parts.

Source: VA.gov

Why doesn't the VA just add my ratings together?

The VA uses what it calls the whole person theory, because a person cannot be more than 100% able-bodied. Your highest rating comes off a whole, healthy 100. The next rating applies only to what is left over. Source: VA.gov

Picture it like readiness. A 50% rating means the VA treats you as 50% efficient. The next disability works on that remaining 50, not on a fresh 100. Stack enough conditions and each one counts for less on paper, even though you feel all of them.

How does the combined ratings table work?

You line your ratings up from highest to lowest, then read the combined value off Table I in 38 CFR 4.25. Take a 50 and a 30. Find 50 in the left column and 30 in the top row. They meet at 65. Round to the nearest 10, and your combined rating is 70%. Source: eCFR, 38 CFR 4.25

The math underneath: 50 leaves 50 points of efficiency. Thirty percent of that 50 is 15. Add it back and you get 65, which rounds to 70.

So what do two 50% ratings actually combine to?

Eighty percent. The first 50 leaves 50 points. The second 50 takes half of that remaining 50, which is 25. Fifty plus 25 is 75, and 75 rounds up to 80. So two 50% conditions get you to 80, not 100. Source: VA.gov

That catches a lot of troops off guard. It is not the VA shorting you. It is the math the regulation requires.

How does rounding work?

The VA rounds your final combined value to the nearest 10%. Values ending in 1 to 4 round down, and values ending in 5 to 9 round up. Source: VA.gov

A combined value of 74 rounds to 70. A value of 75 rounds to 80. That is why a single point can decide whether you land at 70 or 80. One more note: two 10% ratings combine to 19%, and the rounding happens only at the very end, after every disability is combined.

What is the bilateral factor?

The bilateral factor is an extra 10% the VA adds when you have matching disabilities on both arms, both legs, or paired muscles. The VA combines the paired ratings first, adds 10% of that value, and then combines everything else. Source: 38 CFR 4.26

The regulation's own example: with ratings of 60, 20, 10, and 10 (the two 10s being bilateral), the two 10s combine to 19 and the bilateral add makes 21. Then 60 and 21 combine to 68, and 68 and 20 combine to 74, which rounds to 70. It is a small boost, but for two bad knees or two bad wrists it can matter.

Why does this matter for your paycheck?

Your combined rating sets your monthly compensation and helps decide your eligibility for other benefits, so a jump from 70 to 80 can mean real money. The VA publishes current dollar amounts by rating. Source: VA.gov

This is also why the value of each individual rating matters, and why it can be worth having a VA-accredited representative check the math before you accept a decision.

If I have a 50 and a 50, why is my VA rating only 80 percent?

Because the second 50 only applies to the 50 points left after the first one. That works out to 75, which rounds up to 80.

Does the VA round my disability rating up or down?

Both. The VA rounds the final combined value to the nearest 10. Values ending in 1 to 4 go down, and values ending in 5 to 9 go up.

Why is my combined rating lower than my ratings added up?

The VA uses the whole person theory. Each new rating applies only to your remaining efficiency, not a fresh 100, so the combined total is usually lower than a straight sum.

What is the bilateral factor and do I get it?

It is a 10% add for disabilities affecting both arms, both legs, or paired muscles. You get it only when there is a compensable disability in each of the two paired limbs or muscles.

Can two ratings ever add to exactly 100 percent?

Reaching 100% by combining lower ratings is hard, because each rating counts for less than its face value. Many veterans reach the 100% rate through Individual Unemployability instead.

Where can I see the VA combined ratings table myself?

The VA posts the full table and a step-by-step example on its About disability ratings page, and the regulation itself is 38 CFR 4.25.

Where to get help

• A VA-accredited representative or VSO for free help understanding your rating and combined math.
• VA.gov: View your disability ratings to see your individual and combined ratings.
• Military OneSource for free, confidential support and referrals.
• Your installation legal assistance office (JAG) for free help understanding documents and your rights.
• VA.gov or the VA benefits hotline at 800-827-1000.

Verification Notes

• The combined ratings table, the whole person theory, the 50-and-30 example, and the rounding rule are confirmed on the VA About disability ratings page (last updated November 5, 2024). Re-verify before publish.
• The bilateral factor and its regulatory example are from 38 CFR 4.26 (amended April 2023), which also includes an exception in paragraph (d) not covered in the body.
• Monthly compensation dollar amounts change each year with the cost-of-living adjustment and are not stated here.

Sources & links

• VA: About disability ratings (combined ratings table)
• eCFR: 38 CFR 4.25, Combined ratings table
• 38 CFR 4.26, Bilateral factor (Cornell LII)
• VA: Current disability compensation rates

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