What is the one-year lookback for VA increased rating claims?

Under 38 U.S.C. § 5110(b)(3) and 38 C.F.R. § 3.400(o)(2), when you file a claim for an increased rating, VA can set the effective date as early as the date it is factually ascertainable that your condition got worse, as long as that date falls within the one year before VA received your claim. It is the one place in effective date law where filing later does not automatically cost you everything.

Can the effective date go back more than one year before I filed?

Not under this rule. If the worsening happened more than a year before your claim, the effective date is the date VA received the claim. The courts that review VA decisions have confirmed that limit. Other rules, such as reconsideration based on newly found service records, can reach further back, but the increased rating lookback stops at twelve months.

What does 'factually ascertainable' mean?

It means the record contains something VA can point to showing your disability had worsened to the next rating level as of a specific date. A treatment note, an emergency room visit, a private evaluation, an employer's records, or a credible lay statement can all establish it. It does not require a VA examination.

Does the lookback apply to TDIU claims?

Yes. A claim for total disability based on individual unemployability is treated as a claim for an increased rating, so the same effective date rules apply. The question becomes the earliest date within that year when it was factually ascertainable that you could no longer maintain substantially gainful employment.

Does the lookback apply to an original service connection claim?

No. Section 3.400(o)(2) applies to claims for increase on conditions that are already service connected. Original grants of service connection follow different rules, generally the date of claim or the date entitlement arose, with a separate exception for claims filed within one year of discharge.

Does the date on my medical report become my effective date?

Not necessarily. The effective date is supposed to reflect when the increase in severity actually occurred, not simply the date a test was performed or a report was written. The exam date is evidence of the worsening, not proof that the worsening began that morning.

The One-Year Lookback: How Far Back VA Can Pay an Increased Rating

Q: How does an Intent to File affect this?

An Intent to File, VA Form 21-0966, sets your claim date as of the day VA receives it, provided you file the complete claim within one year. Because the lookback runs backward from the claim date, an early Intent to File keeps an early worsening inside the window. It does not create back pay on its own. If your condition worsened the same week you submitted the Intent to File, your effective date is that week, not a year earlier.

Most effective date rules in VA law run one direction: the day you file is the earliest day VA will pay you, and every month you wait is a month you do not get back.

Claims for an increased rating are the exception.

When a condition VA has already service connected gets worse, the law lets VA reach back up to one year before you filed and pay you from the date the worsening can be shown. It is a real and frequently overlooked source of back pay, and it is also widely misunderstood in a way that costs veterans money.

Here is how it actually works.

The VA one-year lookback for increased rating claims: worsening documented 3 or 11 months before you filed is paid from the date it got worse; worsening four years back, or nothing documented until the day you filed, is paid only from the day you filed; an Intent to File sent the week it worsened holds your claim date so the worsening stays inside the window.

The General Rule First

For most claims, the effective date is the date VA received the claim or the date entitlement arose, whichever is later. That is 38 U.S.C. § 5110(a) and 38 C.F.R. § 3.400.

Read that carefully, because the word “later” is what makes VA effective date law so unforgiving. If your knee got materially worse in 2019 and you filed in 2026, the general rule pays you from 2026. The seven years in between are gone.

The Exception for Increases

For increased rating claims, 38 U.S.C. § 5110(b)(3) and 38 C.F.R. § 3.400(o)(2) create a narrow window in the other direction.

The effective date is the earliest date as of which it is factually ascertainable that an increase in disability had occurred, if the claim is received within one year from that date. Otherwise, it is the date VA received the claim.

Two conditions have to be met, and both matter:

The evidence has to show the condition worsened enough to meet the next rating level, as of some identifiable date.
That date has to fall within the twelve months before VA received your claim.

Meet both, and VA pays from the date of the worsening. Miss the second one, and VA pays from the date you filed.

The Lookback Is a Ceiling, Not a Floor

This is where the rule gets misread most often.

Veterans hear “one-year lookback” and take it to mean that filing an increase claim automatically buys a year of back pay. It does not. The year is the outer limit of how far back VA is permitted to go, not a bonus attached to every grant.

If nothing in the record shows worsening until the week you filed, your effective date is the week you filed. If the record shows worsening eight months before you filed, you get eight months.

And if the worsening happened more than a year before you filed, the lookback gives you nothing at all. The courts that review VA decisions have been clear on this: the earlier effective date provision applies only when the increase precedes the claim by no more than one year. Where the worsening happened earlier than that, you are back to the general rule and the date of your claim.

So the veteran whose condition clearly deteriorated four years ago and who files today does not get four years, or even one. They get today.

That asymmetry is the entire practical argument for filing as soon as a condition worsens.

What “Factually Ascertainable” Actually Requires

The phrase sounds like it demands a formal medical finding. It does not.

What it requires is something in the record that lets VA identify a date. VA is obligated to look at the evidence covering the year before your claim to determine when the increase occurred. Evidence that can establish the date includes:

VA or private treatment records documenting increased symptoms, new medication, new imaging, or a change in treatment plan
Emergency room or urgent care records from a flare-up
Employer records showing reduced hours, accommodations, missed work, or termination
Physical therapy or specialist evaluations with measured findings such as range of motion
Your own statement, and statements from a spouse, coworker, or friend describing when things changed and how

Lay evidence counts here. A veteran is competent to describe symptoms they can observe, and a spouse is competent to describe what they watched happen at home. That evidence does not have to carry the whole claim to be enough to fix a date.

The important point is that the date has to be findable in the record. VA will not go hunting for it, and it will not infer a date from silence. If your symptoms worsened in November but you did not see anyone about it until March, the record may only support March. Documentation, at the time, is what turns a worsening into an effective date.

The Exam Date Is Not Automatically the Date

There is a related trap worth naming.

VA frequently assigns the date of the C&P examination that confirmed the worsening as the effective date, on the theory that this is when the increase became ascertainable. That is not always correct. The effective date is supposed to reflect when the increase in severity actually occurred, not merely the date a test was administered or a report was written.

The exam is evidence of the worsening. It is not evidence that the worsening began the morning of the exam. If treatment records, work history, or lay statements place the change earlier, that earlier date is the one to argue for, so long as it falls inside the one-year window.

This is a small distinction on paper and often several thousand dollars in practice.

What the Lookback Does Not Cover

Original service connection claims. This rule applies to conditions VA has already service connected. A first-time claim for service connection follows different rules, with its own separate exception for claims filed within one year of discharge.

Worsening more than a year back. Covered above, and worth repeating because it is the single most common disappointment in this area.

Ratings increased because the law changed. When a rating goes up because VA revised the rating schedule or a liberalizing rule took effect, a different regulation governs the effective date.

Anything that depends on a claim VA never received. The lookback runs from the date VA received your claim. If there is a dispute about whether an earlier claim exists, that is a different fight, and sometimes a better one. See unadjudicated claims and, where old service records are involved, reconsideration under § 3.156(c).

Intent to File Holds Your Place

One practical move is underused, though it is worth being precise about what it does.

An Intent to File, VA Form 21-0966, tells VA you plan to file. Submit it, complete the actual claim within a year, and VA treats the claim as received on the date of the Intent to File.

Because the lookback runs backward from the claim date, an early Intent to File keeps an early worsening inside the window. What it does not do is manufacture back pay. If your condition worsened the same week you submitted the Intent to File, your effective date is that week, not a year earlier. The lookback never reaches further back than the evidence shows.

Where it earns its keep is the gap between the worsening and the finished claim. Suppose your condition clearly deteriorates in January, and gathering private records, a specialist evaluation, and lay statements takes you into the following March. Filing cold in March, the window only reaches back to the prior March, and January has already fallen out of it. An Intent to File submitted in January fixes the claim date there, and January is still your effective date.

It takes minutes and it is free. For a veteran who knows a condition is deteriorating but is not ready to file a complete claim, there is essentially no reason not to submit one.

What to Do If Your Condition Has Gotten Worse

File now, not when the file is perfect. The evidence can come later. The claim date cannot move forward once it is set, and every month of delay burns a month off the lookback. An Intent to File is the fastest version of this step.

Get seen and get it documented. An effective date is built out of records that already existed. A visit today creates a date; a memory of last spring usually does not.

Write down when it changed and what changed. Not symptoms in general, but the specific point things got worse and what that looked like day to day. Submit it on VA Form 21-4138. This is often the only evidence tying the worsening to a date.

Read the effective date paragraph in your decision, not just the percentage. A grant with a bad effective date is a partial denial. It is appealable on that basis alone, and effective date errors are among the most common VA makes. If the decision is less than a year old, a Supplemental Claim or Higher-Level Review can address it. See how to appeal a VA denial.

Check whether the increase was already ascertainable when VA decided. If your file contained records showing worsening earlier in that one-year window and VA used the exam date instead, that is an argument worth making.

The Bottom Line

The one-year lookback is one of the few rules in VA effective date law written in the veteran’s favor. It is also self-limiting: it rewards filing promptly and gives nothing to filing late.

If a service-connected condition has gotten worse, the most valuable thing you can do this week is create a claim date. Everything else about the claim can be built afterward. The date cannot.

Blackmore Veterans Law, P.C. is a solo practice representing veterans in VA disability claims and appeals. Contact us to discuss your situation.

This article is general information about VA disability law and is not legal advice for any individual case. Reading it does not create an attorney-client relationship. Attorney advertising.