Reviewed for accuracy against 38 CFR · Updated April 2026
Most veterans know they can appeal a VA decision within one year. But what happens when a decision became final years ago — and was clearly wrong? That's where the CUE claim comes in. A Clear and Unmistakable Error (CUE) motion allows a veteran to reopen a final, non-appealable VA decision at any time and, if successful, recover back pay all the way back to the original effective date of the erroneous decision. We're talking potentially years or even decades of back pay. CUE claims are complex and success rates are low without proper legal help — but when they succeed, the payoff is enormous.
What Is a CUE Claim?
A Clear and Unmistakable Error (CUE) is a specific type of VA motion governed by 38 CFR § 3.105(a) and defined by case law from the Court of Appeals for Veterans Claims (CAVC). It is not an appeal — it is a collateral attack on a final decision, meaning it can be filed against decisions that are no longer open to normal appeal because the appeal window has closed.
For a CUE to exist, three elements must be present:
The VA either applied incorrect statutory or regulatory law to the facts at the time of the decision, or the facts known at the time of the decision were not before the adjudicator
The error was "undebatable" — meaning a reasonable person reviewing the decision would agree the error occurred, based solely on the law and evidence that existed at the time
The outcome would have been "manifestly different" absent the error — meaning the error actually changed the result
What CUE is NOT: a disagreement with how the VA weighed the evidence. The VA can make mistakes in judgment and evaluation that feel clearly wrong to a veteran but do not constitute CUE. CUE requires a specific legal or factual error that was undebatable at the time — not a reargument of the evidence.
💰 Why CUE Matters — The Back Pay Potential
When a CUE motion succeeds, the effective date of the corrected rating goes back to the date of the original erroneous decision — not the date of the CUE filing. A veteran who was wrongly denied a 50% PTSD rating in 2005 and wins a CUE in 2026 could receive 21 years of back pay at that rating — potentially exceeding $275,000. This is why CUE claims attract serious attorney attention despite their complexity.
Common Examples of Actual CUE
Not every bad VA decision is a CUE. Here are situations that courts have recognized as valid CUE:
The VA applied the wrong rating criteria. If the VA rated a condition under an incorrect diagnostic code that carried a lower maximum rating than the correct code, that's a legal error that may be CUE.
The VA failed to apply a regulation that existed at the time. For example, if a presumptive condition regulation applied to the veteran's situation but the VA ignored it and denied service connection, that's potentially CUE.
The VA failed to consider a piece of evidence that was in the file. If a nexus letter or medical record was in the claims file but the rating decision didn't address it, that may be CUE.
The VA applied the law that existed at the time of the decision incorrectly. An error in applying a legal standard — not just weighing evidence differently — can be CUE.
Math errors in the combined rating calculation. If the VA's arithmetic was simply wrong, that's a clear error that may constitute CUE.
What Does NOT Qualify as CUE
A difference of opinion about how evidence was weighed — even if you believe the VA reached the wrong conclusion
New evidence that wasn't available at the time of the original decision (that's a supplemental claim, not CUE)
A change in law or regulation after the decision was made
A bad C&P exam that you should have challenged on appeal at the time
General dissatisfaction with the decision without a specific identifiable legal or factual error
How to File a CUE Motion
A CUE motion is filed on VA Form 20-0840 (Motion for Revision Based on Clear and Unmistakable Error) or by submitting a written motion to the appropriate VA body. The filing depends on which level of decision is being challenged:
Rating decision CUE: Filed with the VA Regional Office (VARO) — any VARO can accept it
Board of Veterans' Appeals (BVA) decision CUE: Filed directly with the BVA as a motion for reconsideration based on CUE
CAVC decisions: Cannot be challenged via CUE — other mechanisms apply
Your CUE motion must specifically identify:
The exact decision being challenged (date, rating decision number)
The specific legal or factual error — citing the regulation or statute that was violated
Why the error was undebatable at the time it was made
How the outcome would have been different absent the error
⚠️ CUE Claims Are One-Shot
Under 38 CFR § 3.105(a), you cannot raise the same CUE argument twice against the same decision. If you file a CUE motion and it's denied — or if you raise the wrong argument — you may permanently lose the ability to challenge that specific decision on that basis. This is the primary reason CUE claims should not be attempted without experienced VA attorney representation. A poorly argued CUE motion can close doors permanently.
CUE vs. Supplemental Claim — Which Do You Need?
Many veterans confuse CUE with reopening a claim via supplemental claim (VA Form 20-0995). Here's the key difference:
Supplemental claim: You have new and relevant evidence that wasn't before the VA when the decision was made. Back pay starts from when you file the supplemental claim. Used when you have better evidence now than you did before.
CUE motion: The original decision was legally wrong based on what existed at the time. Back pay goes all the way back to the original effective date. Used when the VA made a clear legal or factual error — no new evidence needed.
If you have new medical evidence that would change your rating, file a supplemental claim. If you believe the VA misapplied the law or ignored evidence that was already in the file, that's a CUE situation.
The Role of a VA Attorney in CUE Claims
CUE claims have a low success rate for unrepresented veterans — not because the claims aren't valid, but because identifying and articulating a proper CUE requires fluency in VA regulations, case law from the CAVC, and the specific regulatory framework that existed at the time of the original decision. You need to argue not just that the decision was wrong, but that it was wrong in a specific, legally defined way.
VA attorneys who handle CUE cases typically perform a detailed review of your C-file to identify potential CUE issues before filing. This review is often what surfaces the strongest arguments. If a CUE motion succeeds, the attorney fee is capped by law at 20% of past-due benefits — meaning their fee comes from the back pay they recovered for you, not your pocket.
Editorial Standards: This article was written by
Marcus J. Webb, a veterans benefits researcher who has studied 38 CFR Part 4, the VA M21-1 Adjudication Manual, and thousands of BVA decisions.
Content is verified against current 38 CFR regulations and
VA.gov guidance.
Last reviewed: April 2026. Not legal advice — for representation on your specific claim,
talk to a VA-accredited attorney.