VA Effective Date Rules Explained (38 CFR § 3.400)

The general rule

Under 38 CFR § 3.400, the effective date of an award is generally the later of (1) the date VA received the claim, or (2) the date entitlement to the benefit arose. 'Entitlement arose' means you actually met every element of the benefit — diagnosis, in-service event, and nexus for service connection.

Original claims and the one-year-after-separation rule

If an original compensation claim is received within one year of discharge from active duty, the effective date is the day after separation — even if entitlement technically did not arise until later. This is one of the most valuable backdating rules and is regularly missed by veterans who delay filing.

Intent to file

Filing VA Form 21-0966 (Intent to File) establishes a placeholder effective date for up to one year while you assemble evidence. Submit the formal claim on the correct form within that year and the effective date relates back to the intent-to-file date.

Reopened and supplemental claims

A Supplemental Claim filed within one year of a prior denial preserves the original effective date if granted. Filed after one year, the effective date generally becomes the date the supplemental claim was received — even if you ultimately prove entitlement existed all along.

Increase claims — the one-year look-back

Under 38 CFR § 3.400(o)(2), an increase can be assigned an effective date up to one year before the date of the increase claim, if the evidence shows the increase in disability occurred during that prior year. This is the rule that turns a well-documented worsening into a meaningful retroactive payment.

Practical example: a veteran files for an increase on June 1, 2026, and submits private treatment notes showing the worsening began in October 2025. The effective date can be October 2025 — eight months of additional back pay.

Liberalizing law / regulation

When VA expands eligibility (e.g., a new PACT Act presumptive), 38 CFR § 3.114 allows an effective date as early as the date of the law if the claim is filed within one year of the law's effective date. Filed later, the effective date is the date of the claim.

Clear and unmistakable error (CUE)

A successful CUE motion under 38 CFR § 3.105(a) revises an effective date all the way back to the original incorrect decision. CUE is a narrow remedy — the legal error must be so clear that no reasonable adjudicator could have made the call. But when it applies, it can move an effective date by years or decades.

Where these claims break down

• ×Not filing an Intent to File before gathering evidence — losing months of potential back pay.
• ×Filing a supplemental claim 13 months after a denial and losing the original effective date.
• ×Forgetting to invoke the one-year look-back on an increase claim by submitting older worsening evidence.
• ×Assuming the effective date is the date entitlement arose — VA generally uses the later of arose vs. received.
• ×Overlooking § 3.114 when filing under a new presumptive within the one-year liberalizing window.

Frequently Asked Questions