Quick Answer: The VA combined ratings system uses the Whole Person method — each disability is applied to your remaining healthy percentage, not to 100%. The result is always rounded to the nearest 10%, with .5 rounding up. Understanding this math helps you strategically plan which conditions to pursue for maximum rating impact.
The Whole Person Method: A Deeper Look
The Whole Person method treats you as 100% healthy to begin with. Each service-connected condition then “disables” a portion of your remaining health. The formula is straightforward but produces results that seem counterintuitive until you understand the underlying logic.
Step-by-Step Example With Four Conditions
| Step | Condition | Rating | Remaining Health Before | Value Added | New Combined Total |
|---|---|---|---|---|---|
| 1 | PTSD | 70% | 100% | 70.0 | 70.0% |
| 2 | Lower Back | 20% | 30% | 6.0 | 76.0% |
| 3 | Tinnitus | 10% | 24% | 2.4 | 78.4% |
| 4 | Right Knee | 10% | 21.6% | 2.2 | 80.6% |
| Final | — | — | — | — | 80% (rounds from 80.6) |
Sum of individual ratings: 110%. VA combined rating: 80%. This gap is why so many veterans are confused when they receive their decision letter.
Rounding Rules
The VA rounds your final combined value to the nearest 10%. Under 38 CFR § 4.25:
- Values ending in 1–4 round down (e.g., 74% → 70%)
- Values ending in 5–9 round up (e.g., 75% → 80%)
This means a combined value of 74.9% becomes 70%, while 75.0% becomes 80% — a $419/month difference in 2026. If you’re close to a rounding threshold, adding even a small secondary condition can push you into the next bracket.
How to Use This Math Strategically
Because each new condition applies to a smaller remaining percentage, conditions added early in the process have the most impact. A 10% condition when your combined value is 40% adds 6% to your total. The same 10% condition when your combined value is 80% adds only 2%.
If you’re already at 80% combined, you need higher-rated conditions (30%+) or TDIU to meaningfully increase your monthly compensation. An accredited VSO can help you identify the highest-impact paths — free of charge under federal law and California SB 694.
Frequently Asked Questions
Does the order in which I file conditions affect my rating?
The VA always applies the Whole Person formula starting with the highest-rated condition, regardless of the order you filed. So the sequence of filing does not affect your final combined rating — only the individual ratings assigned to each condition matter.
Can my combined rating ever equal the sum of my individual ratings?
Only if you have a single condition — then your combined rating equals your individual rating. With two or more conditions, the combined rating will always be less than the sum of individual ratings due to the Whole Person method’s diminishing returns structure.