Which condition must be met for a veteran to qualify for "TDIU" benefits?

For a veteran to qualify for Total Disability based on Individual Unemployability (TDIU) benefits, it is essential that they have a formal diagnosis of a service-connected disability. This diagnosis serves as the foundation for demonstrating that the veteran's condition significantly impairs their ability to maintain substantially gainful employment. The TDIU benefits recognize that even if a veteran does not have a total disability rating of 100%, they may still be unable to work due to their service-related conditions.

A service-connected diagnosis indicates that the disability originated or was aggravated during military service, which is a critical factor in establishing eligibility for TDIU. Veterans must provide sufficient medical evidence to support the diagnosis and its impact on their daily functioning and employment capacity.

The other options do not address the necessary criteria for TDIU eligibility. Serving in combat does not automatically qualify a veteran for TDIU benefits, as benefits are determined by the severity of the diagnosis rather than combat status. Similarly, having an active business or being on medical leave is not relevant for qualifying, as the focus is strictly on the veteran’s ability to work due to their service-connected conditions.