To qualify for TDIU (Total Disability based on Individual Unemployability), you need two things: service-connected ratings that meet VA's thresholds (or a case for an exception), and evidence that your service-connected disabilities prevent you from securing and following a substantially gainful occupation. This guide covers both parts, including how VA combines ratings, what "substantially gainful employment" means, and what evidence carries weight.
Step 1: Meet the Rating Requirements (38 CFR 4.16(a))
Under the schedular rule in 38 CFR 4.16(a), you meet the rating requirement if you have either:
- 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 enough additional disability to bring the combined rating to 70% or more.
Meeting these numbers does not grant TDIU by itself. It means VA must decide whether your service-connected conditions actually prevent substantially gainful work.
When Several Disabilities Count as "One Disability"
For the single 60% disability, or the single 40% disability in the two-or-more rule, 4.16(a) treats these as one disability:
- Disabilities of one or both upper extremities, or of one or both lower extremities, including the bilateral factor if it applies
- Disabilities from a common cause or a single accident
- Disabilities affecting a single body system, such as orthopedic, digestive, respiratory, cardiovascular-renal, or neuropsychiatric
- Multiple injuries incurred in action
- Multiple disabilities incurred as a prisoner of war
For example, a veteran with a 30% right knee rating and a 20% left knee rating may be able to count them together as one lower-extremity disability for this purpose. This rule helps many veterans reach the 40% or 60% single-disability level.
How VA Combines Ratings
VA does not add ratings together. It uses the combined ratings table in 38 CFR 4.25, which applies each rating to the "remaining" efficiency. For example, 50% and 30% produce a combined value of 65. VA then rounds to the nearest 10, and values ending in 5 round up, so 65 becomes a 70% combined rating. That veteran meets the 70% combined requirement, and the 50% rating satisfies the "at least one at 40%" requirement.
Small differences matter. A veteran with 40% and 40% has a combined value of 64, which rounds down to 60%. That does not meet the 70% combined requirement for two or more disabilities, unless the two conditions can be counted as one disability under the rules above.
Step 2: Show You Cannot Hold Substantially Gainful Work
This is the part most TDIU claims turn on. VA's benefit page describes it simply: you cannot have a steady job that supports you financially because of your service-connected disability, and odd jobs (marginal employment) do not count.
The Court of Appeals for Veterans Claims explained the legal test in Ray v. Wilkie, 31 Vet. App. 58 (2019). The phrase "secure and follow a substantially gainful occupation" has two parts:
- Economic: the ability to earn more than marginal income, outside of a protected environment. Marginal income is measured against the Census Bureau poverty threshold for one person ($16,330 for 2025).
- Non-economic: whether your history, education, skill, and training, along with your physical abilities (exertional and non-exertional) and mental abilities, allow you to get and keep that work. Mental abilities include memory, concentration, adapting to change, handling workplace stress, getting along with coworkers, and being reliable and productive.
VA must look at your service-connected conditions only. Under 38 CFR 4.19 and 3.341(a), it may not consider your age or non-service-connected conditions. And under 4.16(a), VA must consider "the nature of the employment and the reason for termination."
Marginal Employment Does Not Disqualify You
Work is not automatically a bar to TDIU. Marginal employment is not substantially gainful employment. It generally exists when your earned annual income does not exceed the Census Bureau poverty threshold for one person, and it can also exist above that level if you work in a protected environment such as a family business or sheltered workshop. See Can you work on TDIU? 2026 income limit for the full rules and recent thresholds.
What VA Must Show Before Denying
The court has placed limits on how VA can deny TDIU:
- In Beaty v. Brown, 6 Vet. App. 532 (1994), the court held that VA may not reject a TDIU claim without producing evidence, "as distinguished from mere conjecture," that the veteran can actually perform work that would produce more than marginal income.
- In Withers v. Wilkie, 30 Vet. App. 139 (2018), the court held that "sedentary work" has no fixed legal meaning in TDIU cases. If the Board relies on it, it must explain what it means and how it fits the veteran's education and work history.
- In Geib v. Shinseki, 733 F.3d 1350 (Fed. Cir. 2013), the Federal Circuit held that the TDIU decision is ultimately for the adjudicator, not a medical examiner. Medical opinions describe functional limits; VA decides what those limits mean for employment.
That last point is why vocational evidence matters. A doctor can describe what you can and cannot do. A vocational expert explains what those limits mean for real jobs, given your education and work history.
If You Do Not Meet the Rating Thresholds: 38 CFR 4.16(b)
Veterans who fall short of the 4.16(a) numbers can still receive TDIU. Under 4.16(b), VA policy is that every veteran who cannot secure and follow a substantially gainful occupation because of service-connected disabilities should be rated totally disabled. Regional offices refer these cases to the Director, Compensation Service, for extraschedular consideration. These cases need especially clear evidence tying your service-connected conditions to your inability to work. See extraschedular TDIU under 4.16(b).
How to Apply
- File VA Form 21-8940 (Veteran's Application for Increased Compensation Based on Unemployability).
- Send or request VA Form 21-4192 (Request for Employment Information) for your recent employers.
- Include medical evidence describing your functional limits, not just diagnoses.
- Add statements from you, family, or former coworkers about how your conditions affected work.
- Consider a vocational opinion that addresses both parts of the Ray test.
See how to complete VA Form 21-8940 for help with the form.
How a Vocational Opinion Fits
A vocational opinion from a credentialed rehabilitation counselor reviews your records, work history, education, and transferable skills, and explains whether your service-connected limitations rule out substantially gainful work. Our standard report is a $1,599 flat fee and is delivered in 5–7 business days once we have both your records and the completed interview. Request a free case fit check to see whether it fits your case.
Frequently Asked Questions
What rating do I need to qualify for TDIU?
One service-connected disability rated at 60% or more, or two or more with a combined rating of 70% or more and at least one rated at 40% or more (38 CFR 4.16(a)). Veterans below these levels may still qualify under 4.16(b).
Can I qualify for TDIU with a 50% and a 30% rating?
On the ratings, yes. 50% and 30% combine to 65, which rounds up to 70%, and the 50% rating meets the 40% requirement. You must still show you cannot hold substantially gainful work.
What is substantially gainful employment?
Work that pays more than marginal income (above the Census poverty threshold for one person, $16,330 for 2025) outside a protected environment, and that your education, experience, and physical and mental abilities allow you to get and keep.
Does VA consider my age for TDIU?
No. Under 38 CFR 4.19, VA cannot consider age, and it only looks at service-connected conditions.
Do I need a vocational expert to qualify?
No, it is not required. But a vocational opinion is often the clearest evidence connecting your limits to real jobs, especially after a denial or when a VA exam says you can work.
Last reviewed: September 2026.