Veterans with multiple service-connected disabilities often assume their combined rating is simply the sum of their individual ratings. It isn’t. The VA uses a specific calculation method that consistently produces lower combined ratings than a direct addition would suggest, and understanding how it works is the starting point for identifying whether a current rating is accurate and whether a higher rating may be achievable.
The Whole Person Method
The VA calculates combined disability ratings using what is known as the whole person method, codified in the Schedule for Rating Disabilities at 38 CFR Part 4, Appendix A. The method works as follows: a veteran with a 50% disability is considered to have 50% of their whole person remaining. A second rating is applied not to the full 100%, but to the remaining 50%. A 30% second rating applied to that remaining 50% equals 15%, producing a combined value of 65% before rounding. The combined value is then rounded to the nearest 10%, making 65% a final combined rating of 70%.
This process continues for each additional condition, with each new rating applied to the portion of whole person remaining after prior ratings are accounted for. The result is that combining multiple service-connected conditions always produces a combined rating lower than a simple arithmetic sum.
A Texas service-connected disability lawyer can verify whether the VA applied individual ratings correctly before combining them and whether any conditions were improperly excluded from the calculation.
The Role of Rating Order in the Outcome
The VA typically processes ratings from highest to lowest when applying the combined formula. The highest-rated condition is applied first, which gives it the largest effect on the final combined rating. Veterans should confirm that all service-connected conditions are captured in the calculation and that none are being improperly merged under a single diagnostic code in a way that reduces the overall combined result.
TDIU and Combined Rating Thresholds
For veterans whose combined rating falls below 100% but whose disabilities prevent them from maintaining substantially gainful employment, Total Disability Individual Unemployability, known as TDIU, provides a path to 100% compensation without reaching 100% on the combined schedule.
The eligibility thresholds for TDIU are:
- A single service-connected condition rated at 60% or higher, or
- A combined rating of 70% or higher with at least one condition rated at 40% or more
Veterans near these thresholds benefit from a careful review of whether every service-connected condition is accurately rated and whether secondary conditions should be added to the picture.
When a Combined Rating May Be Inaccurate
Several types of errors produce combined ratings that don’t reflect the full extent of a veteran’s service-connected conditions. Conditions that should be rated separately are sometimes merged under a single diagnostic code. Individual ratings may not reflect the current severity of conditions that have worsened since the last VA examination. Secondary conditions caused by primary service-connected disabilities may never have been formally service-connected at all.
Glover Luck LLP focuses exclusively on veterans disability law and assists Texas veterans in reviewing combined rating calculations, identifying missing conditions, and pursuing supplemental claims or appeals when the current combined rating doesn’t accurately reflect the overall picture.
If your combined rating seems lower than your conditions warrant, speaking with a Texas service-connected disability lawyer is the right step toward understanding whether a higher rating is achievable.
