What IU means
Individual Unemployability, often called IU or TDIU, concerns service-connected disabilities that prevent substantially gainful employment. It can change the payment level while the underlying disability rating stays the same.
Rating requirements
The usual thresholds are one service-connected disability rated at least 60%, or multiple disabilities with one rated at least 40% and a combined rating of at least 70%. Certain cases may qualify below those thresholds. Meeting a percentage alone does not establish eligibility.
Evidence matters
VA reviews evidence about the effects of service-connected disabilities, along with work and education history. Marginal employment is treated differently from substantially gainful employment. Use the official guidance below to review the application and employment-information requirements.