A combined VA disability rating does not always show what service-connected conditions do to a person's ability to work. A veteran may have a 60% or 70% rating on paper but still be unable to maintain steady work that provides a living wage.
That is where Individual Unemployability, often called IU or TDIU, may apply. If VA grants it, the underlying disability rating generally stays the same while compensation is paid at the 100% rate.
The two questions VA considers
TDIU is not based on unemployment alone. The evidence must show that one or more service-connected disabilities prevent substantially gainful employment. VA also reviews the veteran's work and education history.
VA lists these common rating-threshold paths:
- One service-connected disability rated at 60% or more, or
- Two or more service-connected disabilities, with at least one rated at 40% or more and a combined rating of 70% or more.
Meeting the percentage threshold does not guarantee approval. The work limitation must result from service-connected disabilities. VA can also consider certain cases below those thresholds, so a veteran should not assume the percentages alone end the inquiry.
What substantially gainful employment means
VA describes substantially gainful employment as steady work that supports a person financially. Odd jobs or marginal employment may not count. Earnings below the federal poverty threshold for one person are commonly relevant, and VA regulations also recognize that some work in a protected environment may be marginal even when earnings are higher.
Do not decide eligibility from job status alone
Working part time does not automatically disqualify someone, and being unemployed does not automatically qualify someone. Earnings, accommodations, work history, and the functional effects of service-connected conditions all matter.
The forms and evidence
The main application is VA Form 21-8940, Veteran's Application for Increased Compensation Based on Unemployability. It asks about service-connected disabilities, medical treatment, work history, education, and when the disability began affecting employment.
VA also uses VA Form 21-4192 to request employment information. The veteran's most recent employer completes that form. VA.gov allows the 21-8940 application to be completed online, and the TDIU form guide organizes the filing information in plain language.
Useful evidence can include medical records, a clinician's supported opinion about work-related limitations, employment records, and specific statements explaining how service-connected symptoms affect attendance, concentration, lifting, sitting, interacting with others, or other job requirements.
Apply with a complete picture—not a promise
TDIU is a claim for increased compensation. Filing it asks VA to evaluate the relevant disabilities and evidence; approval is never guaranteed. Avoid anyone who promises a result or says there is no possible downside to filing. A free VA-accredited representative can help review the record and explain the options before submission.
If VA denies the claim, review the decision letter before choosing a lane. A Higher-Level Review addresses an error using the existing record, while a Supplemental Claim requires new and relevant evidence. The right choice depends on why VA denied the claim.
A practical next step
Gather employment information for the last five years you worked, along with the recent income information VA requests. List the service-connected conditions that limit work, and write down the specific job tasks those conditions affect. Then review the application with an accredited VSO, attorney, or claims agent rather than relying on a rating percentage or an online promise.
“TDIU is about the effect of service-connected disabilities on substantially gainful work—not simply whether someone currently has a job.”