VA Disability Calculator & 38 CFR Math
Calculate combined VA disability ratings and monthly compensation using official non-additive math.
VA Combined Disability Rating Engine
Service-Connected Disability Conditions
Add individual disability ratings evaluated under Title 38 CFR Part 4.
Official VA rating rounded to the nearest statutory 10% interval under Title 38 U.S. Code.
38 CFR § 4.25 Non-Additive Whole-Person Math Step-by-Step Visualizer
The VA does not add percentages together. Each disability rating is deducted strictly from your REMAINING whole-person efficiency.
| Step | Condition Rating | Efficiency Prior to Step | Efficiency Deducted | Remaining Healthy Efficiency |
|---|---|---|---|---|
| Step 1 | 50% | 100% | -50% | 50% |
Final efficiency remaining: 50%. Combined disability = 100% - Remaining = 50%, which rounds to 50%.
How VA Non-Additive Disability Mathematics Operates
Understanding the statutory whole-person efficiency formula governing service-connected compensation.
Under Title 38 Code of Federal Regulations § 4.25, the Department of Veterans Affairs does not perform standard arithmetic addition on service-connected disability percentages. Instead, each disability rating is applied strictly against the veteran's remaining healthy whole-person efficiency.
Statutory Mathematical Formula (38 CFR § 4.25)
Where individual disabilities are sorted in descending order of severity before sequential multiplication.
The 70% Statutory Threshold and Individual Unemployability (TDIU)
Achieving a 70% combined disability rating represents a critical legal milestone for transitioning veterans. Under 38 CFR § 4.16(a), a veteran with a single disability rated at 60% or a combined rating of 70% (with at least one condition rated at 40% or higher) becomes eligible to apply for Total Disability based on Individual Unemployability (TDIU), which awards monthly compensation at the 100% statutory pay rate.