The VA disability system is not designed to make filing easy — it is designed to evaluate evidence. Veterans who understand what the VA looks for, and who build their claim around that structure, get rated. Veterans who file with a stack of records and hope for the best usually wait years and lose.
TL;DR — What Every VA Claim Actually Requires
The 3-Legged Stool — What VA Actually Looks For
Every compensable VA disability claim needs three things to stand up. If any one of them is missing, the claim falls.
Leg 1 — Current Diagnosis. You need a diagnosis from a licensed medical provider documenting that the condition currently exists and affects your mind or body. VA cannot compensate a condition you had in the past but no longer have, or a condition you describe but have no medical documentation for.
Leg 2 — In-Service Event, Injury, or Exposure. There must be a specific event, injury, or exposure that occurred during active military service — or a pre-existing condition that service made permanently worse. This is where your service treatment records (STRs) become critical. The more specific and documented the event, the stronger your claim.
Leg 3 — Nexus Letter. The nexus is the medical opinion that connects legs 1 and 2. It is a clinician’s professional judgment that your current condition is “at least as likely as not” caused or aggravated by your service. “At least as likely as not” is the VA’s 50-50 standard — you do not need to prove beyond a doubt, but you do need a qualified clinician to put that in writing.
Missing or weak nexus. Veterans file with service records and a current diagnosis but no medical opinion tying the two together. VA denies the claim and sends a long letter explaining the missing link. Get the nexus letter before you file.
Types of VA Claims: Know Which One You’re Filing
Before you build your evidence package, know which type of claim fits your situation.
In-Service Claim. The condition started or was diagnosed during active duty and is documented in your STRs. This is the clearest path — the event and the condition are in the same military file.
Secondary Service Connection. You have an existing service-connected condition that caused or aggravated a new condition. Example: a rated knee injury caused an altered gait that caused a rated hip condition. Secondary claims require a nexus letter connecting the primary disability to the secondary one.
Aggravation Claim. You had a pre-existing condition before service that was permanently worsened — beyond its natural progression — by military service. The baseline is your pre-service medical history. The burden is showing service made it permanently and measurably worse.
Post-Service Claim. The condition appeared after separation but is medically linked to service. This is common with PTSD, toxic exposure conditions (burn pits, Agent Orange), hearing loss, and latent diseases that take years to develop after the triggering event.
VA also recognizes a wide range of conditions including chronic pain, lung disease, hearing loss, limited range of motion, cancers related to toxic exposures, anxiety, depression, PTSD, MST-related conditions, and TBI — even when the service record does not show a single dramatic event.
Evidence: DBQs, Nexus Letters, and Buddy Statements
Your claim is only as strong as your evidence. Here is what moves the needle:
Disability Benefits Questionnaires (DBQs)
DBQs are VA-created forms that licensed healthcare providers complete to document a diagnosis, the symptoms, their severity, and how they affect your function. They are formatted specifically to match the criteria VA raters use. A completed DBQ from your own doctor is more useful than a stack of medical records because it speaks VA’s language.
VA restricted private DBQ use in 2021, then partially reversed course. As of 2024, VA again accepts DBQs from private providers for most conditions. Confirm current policy at va.gov before filing, as this policy has shifted multiple times.
Nexus Letters
A nexus letter is a formal medical opinion, signed by a qualified clinician, stating that your current condition is “at least as likely as not” caused or aggravated by your military service. The letter should:
- Identify the clinician’s credentials and familiarity with your records
- State the specific service event or exposure being linked
- Use the VA’s legal standard: “at least as likely as not” (50% threshold)
- Explain the medical rationale, not just assert the conclusion
The stronger the nexus letter, the less work your claim has to do everywhere else. A one-page letter from a physician who reviewed your STRs and your current medical records and explains the medical pathway is worth more than 50 pages of raw records.
Buddy Statements
Buddy statements are lay evidence from people who observed your condition or the event that caused it — fellow service members, supervisors, family members. They are particularly useful when:
- The service records are incomplete (MST cases, informal injuries)
- You need to document how a condition affects your daily functioning
- You want corroboration of an in-service event
A buddy statement is not a substitute for medical evidence on the nexus, but it can fill gaps in the factual record and strengthen the picture of your functional impact.
Map every claimed condition to the 3-legged stool. Then ask: did this primary condition cause anything else? A rated back injury causing depression, or a rated knee injury causing sleep problems, can each be filed as secondary claims with their own ratings — adding to your combined disability percentage.
C&P Exam Preparation
The Compensation and Pension exam is the VA’s evaluation of your claimed conditions. A contracted examiner — typically from VES, QTC Medical Services, or LHI (Logistics Health Incorporated) — reviews your file and examines you in person or by telehealth. Their opinion carries significant weight in the rating decision.
Review your claim, the specific conditions you filed, and the VA rating criteria for each. You can look up the "General Rating Formula" for each condition in 38 CFR Part 4.
Know what is and is not in your STRs. Know what your private medical records show. If the examiner raises something you have not seen, you cannot respond effectively.
List every symptom for every claimed condition — frequency, duration, severity, and functional impact. How does it affect your ability to work? Your relationships? Your sleep? Your ability to do daily tasks? Include your worst days and your most frequent bad days, not your rare good days.
VA rates conditions based on their average manifestation — not how you feel on your best day. If the examiner asks "how are you doing today?" and you reflexively say "fine," you have undercut your claim. Tell them about your typical week.
Confirm your device camera, microphone, and internet connection work before the appointment. Have a quiet, private space. Have a backup contact number ready.
If you have a condition you have not formally claimed, do not raise it for the first time during the C&P exam. File it as a separate claim first. An informal mention at the exam rarely gets documented the way you need it to be.
Rating Math Basics
VA disability ratings are not additive. VA uses a “whole person” formula that applies each additional rating to the portion of disability not already rated. The result is called your “combined rating” and is then rounded to the nearest 10%.
Example: A 50% rating means you have 50% disability. A second 30% condition applies to the remaining 50%, producing 15% more, for a combined 65% — rounded to 70%.
This means getting from 90% to 100% is extremely difficult through accumulation. It requires either a single condition rating at 100%, or a Total Disability Individual Unemployability (TDIU) determination — which pays at the 100% rate if VA finds your service-connected conditions prevent you from substantially gainful employment.
Veterans receiving VA disability compensation for a service-connected disability are exempt from the VA funding fee on VA home loans. This fee can run 2.15% or more of the loan amount — on a $300,000 loan, that is $6,450 in savings. If you have a pending claim, you may receive a refund if your effective date predates closing. Verify current fee tables at va.gov before closing.
Common Denial Reasons and How to Avoid Them
No current diagnosis. Your STRs show an injury in 2012, but you have not seen a doctor since. VA cannot rate a condition with no current medical documentation. Get a current evaluation before filing.
No nexus. The most common denial. Your records show the event and your current condition but no clinician ever connected them in writing. Get the nexus letter before filing, not after denial.
Exam showed condition not related to service. A C&P examiner submitted an opinion against nexus. This can be rebutted with an independent medical opinion from your own doctor. An unfavorable C&P opinion is not the end of the claim — it is a data point you can challenge with contrary evidence.
Condition not disabling. 0% ratings exist, but they do not pay. VA may service-connect a condition but rate it at 0% because it does not meet the threshold for compensation. Document functional impact throughout — how the condition affects your work, daily life, and relationships.
Records not obtained. VA has a duty to assist in gathering records, but that duty has limits. If your records are at a private provider, VA cannot always get them. Submit private records yourself rather than waiting for VA to retrieve them.
Using a VSO, Attorney, or Claims Agent
VA-accredited representatives — Veterans Service Organization (VSO) representatives, attorneys, and claims agents — can represent you before VA at no cost or on a contingency basis. They understand the rating system, know how to build an evidence package, and can file supplemental claims and appeals when decisions go wrong.
VSOs (DAV, VFW, American Legion, AMVETS, PVA) provide free representation at every stage. They do not charge fees. Their representatives have dealt with VA’s systems for years.
VA-accredited attorneys and claims agents can charge fees only after a favorable decision on appeal — never upfront and never on initial claims. They are useful for complex denials and appeals to the Board of Veterans’ Appeals.
Avoid: Companies marketing “guaranteed rating increases” or charging upfront fees. These are often illegal under VA regulations and frequently produce no better results than VSO representation.
Filing Your Claim
File online at va.gov/disability/file-disability-claim-form-21-526ez using VA Form 21-526EZ. You can also file through a VSO or mail a paper form.
When filing:
- List every condition you are claiming — you cannot easily add conditions later without filing separately
- Upload your evidence (nexus letter, DBQs, buddy statements, private medical records) at the time of filing
- Request your service treatment records if you do not already have them (DD Form 827)
- Note the exact date you file — this is your potential effective date for back pay
A complete claim — filed with your nexus letter, DBQ, and supporting evidence — typically moves faster than an incomplete one. VA's duty to assist can slow a claim by months while they chase down records you could have submitted yourself.
What Happens After You File
VA sends an acknowledgment letter, then orders a C&P exam if needed, reviews the evidence, and issues a Rating Decision. Typical initial claim processing time ranges from a few months to over a year depending on claim complexity and regional office volume.
If VA denies your claim or rates lower than you believe is warranted, you have three appeal lanes:
- Supplemental Claim — submit new and relevant evidence not previously considered
- Higher-Level Review — request a senior rater review the same evidence (no new evidence added)
- Board of Veterans’ Appeals — appeal to a Veterans Law Judge
You have one year from the Rating Decision to elect an appeal lane without losing your effective date.
Frequently Asked Questions
Can I still file if I was separated years ago?
Yes. There is no statute of limitations on initial VA disability claims. However, your effective date is generally the date VA receives your completed claim — not the date of separation. The longer you wait, the more back pay you forgo.
Do I need a VSO to file?
No. You can file directly at va.gov. But a VSO will review your evidence package, catch missing elements, and represent you at no cost. For complex claims — especially PTSD, TBI, toxic exposure, or MST — using a VSO or accredited attorney significantly improves outcomes.
What is TDIU and who qualifies?
Total Disability Individual Unemployability pays at the 100% rate when VA finds that your service-connected disabilities prevent you from maintaining substantially gainful employment. You generally need at least one condition rated at 60% or a combined rating of 70% with at least one condition at 40% to be considered.
Can I work while receiving VA disability compensation?
Yes, in most cases. VA disability compensation does not have an income limit or work requirement. The exception is TDIU — receiving TDIU requires VA to determine you cannot maintain substantially gainful employment, so working above a certain income threshold can affect TDIU status.
How does a 100% P&T rating change my benefits?
A Permanent and Total (P&T) rating at 100% means VA considers your disability both total (100%) and permanent (not expected to improve). This unlocks additional benefits including Dependents' Educational Assistance (DEA) for your dependents, CHAMPVA for your family's healthcare, and property tax exemptions in many states.
What if my C&P exam was unfair or incomplete?
You can submit a private medical opinion from your own doctor that contradicts the C&P examiner's findings. A well-written private nexus letter or DBQ can rebut an unfavorable C&P opinion and move your claim to a favorable decision. This is a common supplemental claim strategy.