Why your VA ratings don’t add up (§4.25)
A 50% and a 30% rating is not 80%. The VA combines ratings under 38 CFR §4.25 — each new disability only applies to the efficiency you have left, not the whole 100%.
How the combined-ratings rule works
Ratings are combined highest-to-lowest. Each disability is applied to the remaining non-disabled efficiency, then the final value is rounded to the nearest 10%.
Worked example
Take ratings of 50%, 30%, 20%:
- Start at 50% efficiency lost.
- The 30% applies to the remaining 50%, then the 20% applies to what’s left.
- That gives 72% before rounding, which rounds to 70% — not 100%.
Calculate your real combined rating
Our free calculator runs the exact §4.25 math (plus the §4.26 bilateral factor and dependent add-ons most calculators skip) — no signup.
Open the free rating calculator →Unsure which conditions you can claim? Browse secondary conditions by primary.
Informational only and not a guarantee of any rating or payment. All figures are estimates; the VA makes the final decision. This is not medical, legal, or financial advice.