What is the VA Bilateral Factor?

The VA Bilateral Factor refers to a specific consideration within the Department of Veterans Affairs (VA) disability rating system, applied to veterans who have service-connected disabilities affecting paired extremities or skeletal muscles on both sides of the body. This factor plays a significant role in determining the overall disability rating for a veteran, as it acknowledges the interconnectedness and functional impact of disabilities on both limbs.
New 2026 Housing & Disability Increases
See if your monthly benefit qualifies for an update.
When a veteran suffers from disability in both an upper and lower extremity, or in paired muscles on either side, the VA employs the Bilateral Factor to ensure that the severity of the functional impairment is accurately represented in the disability assessment. In essence, this factor recognizes that disabilities affecting paired extremities do not simply aggregate additive ratings, which could underestimate the total impact of the disabilities. Instead, it validates that the combined effects can be more significant due to the coupled nature of their functioning.

As part of the evaluation process, if a veteran’s extremities are rated separately, the VA applies a special formula that includes increasing the combined disability rating by 10 percent for conditions affecting both sides of the body. This adjustment is fundamental for veterans since it conveys a more comprehensive view of their functional limitations and service-related challenges.
The rationale behind implementing the VA Bilateral Factor is rooted in the understanding that sustaining injuries or impairments on both sides can result in greater difficulty with mobility, strength, and overall quality of life. It is important for veterans to be aware of this factor during the rating process, as it can potentially enhance their overall disability compensation and provide recognition of the compounded effects of their service-connected disabilities.
How Bilateral Factor Enhances Disability Ratings
The VA Bilateral Factor plays a crucial role in enhancing combined disability ratings for veterans with disabilities affecting paired extremities, such as arms or legs. This factor is designed to acknowledge the unique challenges faced by individuals with disabilities on both sides of the body and ultimately provides an additional 10% to their combined disability evaluation. This enhancement can significantly impact the overall compensation a veteran receives.

The calculation of the Bilateral Factor begins with the individual disability ratings assigned to each affected extremity. According to VA regulations, if a veteran has a service-connected disability in both an upper extremity and a corresponding lower extremity, the ratings for each must be determined first. If, for example, a veteran has a rating of 30% for the left arm and 20% for the left leg, the combined total using the whole person approach would not simply be 50%. Instead, the VA utilizes a mathematical formula that first converts the rates into decimal equivalents, allowing for a more accurate combined rating calculation.
After determining the combined disability rating, the Bilateral Factor is applied. The combined ratings for disabilities affecting paired extremities always get a bonus from the VA, resulting in this additional 10%. For illustrative purposes, if the combined evaluation of two paired extremities is 40%, the addition of the Bilateral Factor elevates this to 50%. It is important to note that this factor cannot double count disabilities or exceed the total maximum allowable rating based on the condition presented.

Understanding the VA Bilateral Factor is essential for veterans who may be navigating the complexities of their disability ratings. By ensuring that they receive the full extent of their deserved benefits, veterans can better plan for their long-term health and financial stability.
Eligibility Criteria for the Bilateral Factor
To qualify for the VA Bilateral Factor, certain eligibility criteria must be met, specifically related to service-connected disabilities that affect paired extremities or the skeletal muscles. The VA has established guidelines that determine when this additional 10% rating increase applies. First and foremost, the veteran must have a service-connected disability affecting both arms, both legs, or the paired skeletal muscles. These disabilities should be recognized as arising from any incident or condition during military service.
Moreover, the severity of the bilateral conditions must be assessed and reported according to the VA’s rating schedule. The health care professional conducting the evaluation should clearly establish that the disabilities are not only service-related but also meet the minimum rating requirements. The combined disability ratings for the paired extremities or muscles must total at least 10% for the bilateral factor to apply. This means that the individual ratings attributed to each extremity must cumulatively suggest enough impairment that warrants recognition under the bilateral factor criteria.
Another important aspect to note is that the disabilities must be distinctly affecting the same anatomical area. For instance, a service-connected disability in one leg and a related condition in another leg qualify under this factor, provided they meet the aforementioned rating or severity levels. Additionally, the VA assesses the functional impact that these disabilities have on the veteran’s life. If both extremities demonstrate a significant functional impairment that can be confirmed through medical examinations and historical documentation, the veteran will likely become eligible for the additional rating increase.
Filing for a Bilateral Factor Rating Increase
Veterans seeking a bilateral factor rating increase must first understand the procedure involved in filing their claim. The process begins with obtaining the appropriate documentation that can support your case for an increased disability rating. This includes medical records, service treatment records, and any new evidence that highlights the severity of your bilateral condition.
The first step is to fill out the VA Form 21-526EZ, which is the application for disability compensation and related benefits. This form can typically be accessed online through the VA’s website or requested directly from your local regional office. Be sure to indicate that you are applying for an increase based on the bilateral factor, as this will help streamline the process.
Next, it is crucial to gather all pertinent medical documentation. This may involve getting recent evaluations from your healthcare provider that can substantiate the need for a rating increase. Specifically, focus on how the bilateral conditions may have worsened, impacting daily activities. Utilize the Disability Benefits Questionnaire (DBQ), which can be filled out by your physician, offering detailed insights into your specific bilateral issues.
Once you have compiled the necessary documentation and submitted the form, it is advisable to keep a detailed record of your submission and any correspondence with VA officials. This serves not only as proof of your application but also as a critical reference point should additional information be needed during the review process.
Navigating the VA claims process can be challenging; however, veterans can seek assistance from accredited representatives, such as Veterans Service Organizations (VSOs), who can provide valuable support through each step. Their expertise can significantly enhance your understanding of rights and benefits under the bilateral factor.
