What is TDIU, and how do you apply?

The schedule rates conditions. TDIU rates what those conditions did to your ability to earn a living, and it can pay a veteran at the 100% rate while the combined rating stays below 100%.

Last reviewed October 2026 · Not legal advice, VA.gov always controls

Total Disability based on Individual Unemployability, TDIU, sometimes just IU, can pay compensation at the 100% rate when your service-connected conditions prevent you from holding substantially gainful employment, even though your combined rating is below 100%. The usual route needs one disability at 60% or more, or a combined 70% with one at 40% or more; veterans below those numbers can still be considered under § 4.16(b). Meeting the numbers does not guarantee an award (38 CFR § 4.16; VA.gov, Individual Unemployability).

It exists because the rating schedule is an average. It estimates the earnings loss a typical person suffers from a given condition. But averages hide the cases where a particular combination of disabilities, in a particular person with a particular work history, ends a career that the percentages say should have survived.

The percentage thresholds

38 CFR § 4.16(a) sets the schedular gateway. You meet it if:

• You have one service-connected disability rated 60% or more; or
• You have two or more service-connected disabilities, at least one rated 40% or more, with a combined rating of 70% or more.

Certain disabilities are treated as a single disability for that test: disabilities of one or both arms, or of one or both legs, including the bilateral factor; disabilities resulting from a common etiology or a single accident; disabilities affecting a single body system, such as orthopedic, digestive, respiratory, cardiovascular-renal, or neuropsychiatric; multiple injuries incurred in action; and multiple disabilities incurred as a prisoner of war. That grouping rule matters: it is sometimes what gets a veteran to the 60% or 40% single-rating requirement.

Extraschedular TDIU under § 4.16(b)

Not meeting the percentages does not end it. Under § 4.16(b), VA's policy is that every veteran unable to secure and follow substantially gainful work because of service-connected disabilities is to be rated totally disabled, so rating boards are told to send those cases to the Director of Compensation Service for extraschedular consideration. The referral still depends on evidence that you are unemployable, so it is worth asking for explicitly rather than assuming the percentages disqualify you.

What "substantially gainful employment" means

This is the term that decides the claim, and it is narrower than "having a job."

Marginal employment does not count against you

Employment is generally considered marginal, and therefore not substantially gainful, when your earned annual income does not exceed the poverty threshold for one person set by the U.S. Census Bureau (not the separate HHS poverty guidelines). Working part time at low earnings does not automatically defeat a TDIU claim.

Protected or sheltered work can count as marginal too

Employment can also be marginal on a facts-found basis, even when earnings are above the poverty threshold. The regulation's examples are a protected environment such as a family business or a sheltered workshop. Whether another job counts, such as one where an employer tolerates absences no one else would or holds a position open, is decided on the facts, not automatically. If that describes your job, document it: a statement from the employer describing the accommodations is evidence VA can weigh.

Your work history is part of the analysis

The question is not whether you could theoretically perform some job that exists somewhere. It considers your actual education, training, and occupational history. A veteran with twenty years of heavy-equipment experience and a shattered back is not "employable" because a sedentary job exists in the abstract.

How to file

The core form is VA Form 21-8940, Veteran's Application for Increased Compensation Based on Unemployability. It asks for your service-connected conditions, your employment history for the last five years you worked, your education and training, and when your disabilities began to affect employment and when you last worked full time.

VA also asks for VA Form 21-4192, which your most recent employer completes with its account of your work and why it ended. Both forms can be submitted online or by mail (VA.gov, Individual Unemployability).

Evidence that carries weight

• A medical opinion tying the limitation to work. Not "the veteran has severe migraines," but what those migraines mean for attendance, reliability, and productivity, in specific terms.
• Employment records showing the decline: attendance records, disciplinary actions related to symptoms, accommodations granted, the termination or resignation and its stated reason.
• An employer statement describing accommodations or the reason employment ended.
• A vocational expert assessment. Optional and usually paid, but a vocational report addressing employability given your specific history can be decisive in a contested case.
• Lay statements from family and former coworkers describing what work looked like before the end.
• Your own detailed personal statement, what you could do, what changed, what you tried, why it stopped working.

Working while receiving TDIU

You are not barred from working. You are barred from substantially gainful work. Marginal employment, protected employment, and odd jobs below the poverty threshold are consistent with continued TDIU.

What you must do is report changes. When VA asks you to verify your employment status, you complete the Employee Questionnaire, VA Form 21-4140, and earning above the marginal threshold in substantially gainful work can lead to the benefit being reduced or discontinued. Under § 3.343(c), any reduction needs clear and convincing evidence of actual employability, and the rating cannot be reduced solely because a veteran took up substantially gainful work unless that work is kept for 12 consecutive months; short temporary interruptions do not break the count. There are procedural protections before a reduction, including notice of the proposed change with the reasons for it and 60 days to submit evidence, but an overpayment you have to repay is a genuinely bad outcome. Report honestly and promptly.

TDIU and permanence

TDIU can be granted as permanent when improvement is not expected. Permanent and Total status matters beyond the monthly check: it generally ends future routine exams and opens dependent benefits such as Dependents' Educational Assistance and CHAMPVA. If your TDIU award is not marked permanent and your conditions are static, that is worth raising.

TDIU versus a 100% schedular rating

Both pay the same base rate. The differences are around the edges:

If your conditions have worsened enough to support a higher schedular rating, an increase is another route to the same rate, and a schedular 100% does not depend on whether you work. You can pursue both: file for increases on conditions you think are under-rated and file the 21-8940. The combined rating calculator shows how close an increase would bring you.

Before you file

1. Check whether you meet the § 4.16(a) percentages, and if not, whether the grouping rules get you there.
2. Ask whether any currently rated condition is under-rated. An increase might reach 100% schedular outright.
3. Gather the employment record before memories and documents disappear.
4. Ask your treating provider for an opinion that speaks in terms of work capacity, not just symptoms.
5. Talk to an accredited representative. TDIU is one of the areas where free VSO help is most worth using. Find one through VA.gov.

Sources

• 38 CFR § 4.16, Total disability ratings for compensation based on unemployability. The 60% and 40%/70% thresholds, the five grouping rules, marginal and protected employment, and extraschedular referral under (b).
• 38 CFR § 4.25, Combined ratings table. How ratings combine against remaining efficiency and round to the nearest 10, used in the worked example.
• 38 CFR § 4.19, Age in service-connected claims. Unemployability tied to advancing age cannot support a total rating.
• 38 CFR § 3.340(b), Permanent total disability. When a total rating is treated as permanent.
• 38 CFR § 3.343(c), Continuance of total disability ratings: individual unemployability. Clear and convincing evidence of actual employability, and the 12-consecutive-month rule before TDIU can be reduced for substantially gainful work.
• 38 CFR § 3.105(e), Reduction in evaluation: compensation. Notice of a proposed reduction and 60 days to submit evidence.
• VA.gov, Individual Unemployability if you can't work. The eligibility rules in plain terms, that the rating stays the same while the payment changes, the two forms, and the employment questionnaire VA Form 21-4140.
• VA Form 21-8940, Veteran's Application for Increased Compensation Based on Unemployability. The TDIU application, with VA Form 21-4192 listed as the employer's companion form.
• M21-1, Part VIII, Subpart iv, Chapter 3, Section C, Topic 1.c. VA's own manual: age, non-service-connected conditions, and availability of work have no bearing on an IU decision.