TDIU benefits require proving you can't maintain substantially gainful employment. Learn what counts as marginal employment, sheltered work environments, and how to protect your TDIU rating.
Total Disability based on Individual Unemployability (TDIU) is one of the most valuable and most misunderstood VA benefits, paying at the 100% rate even when combined ratings fall below 100%. The core question veterans ask: 'Can I work at all and keep TDIU?' The answer involves understanding 'substantially gainful employment' versus 'marginal employment.' Under 38 CFR § 4.16, marginal employment — generally defined as earning below the federal poverty threshold ($15,060/year in 2024) — does not disqualify TDIU. Part-time work, sheltered work environments, and employment accommodated by an employer due to the veteran's disabilities may also be considered marginal. The BVA evaluates each case on its facts, considering the veteran's education, work history, and the functional limitations caused by service-connected disabilities. Key strategic considerations: veterans should document all workplace accommodations, track days missed due to disabilities, and obtain employer statements confirming reduced capacity. Self-employment income requires careful analysis — the VA looks at actual earnings after deducting business expenses. Veterans considering returning to work while on TDIU should consult with an accredited representative first, as exceeding the marginal employment threshold can trigger a proposed reduction. The 21-4140 form (Employment Questionnaire) is submitted annually and is critical — inconsistencies between this form and tax records are a common trigger for VA review.