2255 Deadline Calculator: Find Your One-Year Filing Date

By Elizabeth Franklin-Best, Esq., and Christopher Zoukis, JD, MBA

When is my § 2255 deadline?

Your §2255 deadline is one year from the latest of four dates in 28 U.S.C. §2255(f): when the judgment became final; when a government-created impediment was removed; when the Supreme Court first recognized a new retroactive right; or when the facts supporting your claim could have been discovered with due diligence. Compute all four and use the latest.

Key takeaways on the § 2255 one-year deadline

• There are four trigger dates and the latest one controls. 28 U.S.C. §2255(f) says the period “shall run from the latest of” the four listed events. Compute every one that applies before you pick a date.
• If you appealed, the clock does not start at sentencing. Clay v. United States, 537 U.S. 522 (2003): “a judgment of conviction becomes final when the time expires for filing a petition for certiorari contesting the appellate court’s affirmation of the conviction” — 90 days after the court of appeals enters judgment, under Sup. Ct. R. 13(1).
• If you never appealed, the clock starts 14 days after the judgment is entered on the criminal docket — the notice-of-appeal period in Fed. R. App. P. 4(b)(1)(A)(i).
• A new Supreme Court case starts the clock on the day it was decided, not the day someone held it retroactive. Dodd v. United States, 545 U.S. 353 (2005), reads §2255(f)(3) as identifying “one, and only one, date … the date on which the right asserted was initially recognized by the Supreme Court.”
• Different claims in the same motion can have different deadlines, because §2255(f)(4) runs from when each claim’s facts were discoverable through due diligence.
• A pending compassionate-release motion, clemency petition, or administrative remedy does not stop the clock. None of the four triggers in §2255(f) turns on any of those filings.
• In prison, the mailbox rule governs. Under Rule 3(d), Rules Governing Section 2255 Proceedings, a paper “is timely if deposited in the institution’s internal mailing system on or before the last day for filing.”

The §2255 statute of limitations, in one paragraph

Section 2255(f) is a one-year statute of limitations. The statute itself calls it a “period of limitation,” and courts use the phrases interchangeably — a §2255 statute of limitations and a §2255 limitation period are the same thing. What makes it unlike an ordinary civil statute of limitations is that it has four possible start dates, not one, and they run independently: each claim is measured from whichever of the four applies to it. That is why two grounds in the same motion can carry two different deadlines, and why the question is never simply “when was I sentenced.”

How do I calculate my 2255 deadline?

Work all four triggers, then take the latest date any of them produces. That is what the statute directs, and skipping straight to the obvious one is the most common way people arrive at the wrong answer.

Here is the operative text of 28 U.S.C. §2255(f), in full, with the controlling words emphasized:

“A 1-year period of limitation shall apply to a motion under this section. The limitation period shall run from the latest of— (1) the date on which the judgment of conviction becomes final; (2) the date on which the impediment to making a motion created by governmental action in violation of the Constitution or laws of the United States is removed, if the movant was prevented from making a motion by such governmental action; (3) the date on which the right asserted was initially recognized by the Supreme Court, if that right has been newly recognized by the Supreme Court and made retroactively applicable to cases on collateral review; or (4) the date on which the facts supporting the claim or claims presented could have been discovered through the exercise of due diligence.”

Four steps, in order:

1. Fix the finality date under (f)(1). This requires knowing exactly what happened on direct review — whether an appeal was filed, whether the court of appeals ruled, whether a certiorari petition was filed, and whether the judgment was later amended. Add one year.
2. Ask whether (f)(2) applies. If unlawful government action actually prevented the filing, the clock runs from the date that impediment was removed.
3. Ask whether (f)(3) applies to any claim. If a claim rests on a right the Supreme Court newly recognized and that has been made retroactive, that claim’s clock runs from the date of the Supreme Court’s decision. Add one year to that date.
4. Ask whether (f)(4) applies to any claim. If a claim rests on facts that could not have been discovered earlier through diligence, that claim runs from the date of discoverability. Add one year to that date.

Then take the latest date any applicable clause produces, claim by claim. If the last day falls on a Saturday, Sunday, or legal holiday, the ordinary computation rules push it to the next business day — Rule 12 of the Rules Governing Section 2255 Proceedings makes the Federal Rules of Civil and Criminal Procedure applicable “to the extent that they are not inconsistent with any statutory provisions or these rules.” Do not build a filing plan around that extra day.

This one-year period is not original to §2255. The 1948 statute had no deadline at all; Congress added §2255(f) in 1996 along with the successive-motion gate, as part of the changes cataloged at AEDPA. Every other clock that runs after a federal conviction — the notice of appeal, Rule 33, Rule 35, §3582 — is inventoried separately at federal appeal deadline. This page computes one date: the §2255(f) date.

When exactly does my conviction become final?

Under §2255(f)(1), it depends on how far direct review went. Three fact patterns cover nearly everyone.

You appealed, lost, and did not petition for certiorari. Clay v. United States, 537 U.S. 522 (2003), holds: “For the purpose of starting the clock on §2255’s one-year limitation period, a judgment of conviction becomes final when the time expires for filing a petition for certiorari contesting the appellate court’s affirmation of the conviction.” That window is 90 days from the entry of the court of appeals’ judgment under Sup. Ct. R. 13(1) — and critically, it runs from entry of judgment, not from the mandate. Clay quotes Sup. Ct. R. 13(3): “[t]he time to file a petition for a writ of certiorari runs from the date of entry of the judgment or order sought to be reviewed, and not from the issuance date of the mandate (or its equivalent under local practice).” In Clay’s own case the mandate issued 21 days after judgment, and the certiorari window closed 69 days after that.

Clay resolved a real disagreement. The Fourth and Seventh Circuits had held that finality attached when the mandate issued; six other circuits had held that it attached when the certiorari window closed. The Supreme Court adopted the majority rule “[t]o secure uniformity in the application of §2255’s time constraint.”

You petitioned for certiorari and it was denied. Finality attaches on the date of the denial. Clay states the general rule: “Finality attaches when this Court affirms a conviction on the merits on direct review or denies a petition for a writ of certiorari, or when the time for filing a certiorari petition expires.”

You never appealed. See the next section — this is the one people get wrong most often, and it is also the one with the shortest window. It also carries a second consequence beyond timing: claims that could have been raised on direct appeal and were not are generally subject to procedural default, so a defendant who took no appeal has both less time and more to overcome. Which claims belonged on appeal in the first place is sorted at 2255 vs direct appeal.

What if I never filed a direct appeal?

Then the judgment becomes final when the time to file a notice of appeal expires — 14 days after the judgment is entered on the criminal docket. Fed. R. App. P. 4(b)(1)(A) provides that “a defendant’s notice of appeal must be filed in the district court within 14 days after the later of: (i) the entry of either the judgment or the order being appealed; or (ii) the filing of the government’s notice of appeal,” and Rule 4(b)(6) specifies that “[a] judgment or order is entered for purposes of this Rule 4(b) when it is entered on the criminal docket.”

The Supreme Court has never decided this question, but the courts of appeals that have addressed it converge. The Sixth Circuit put the reasoning plainly in Sanchez-Castellano v. United States, 358 F.3d 424 (6th Cir. 2004): “when a federal criminal defendant does not appeal to the court of appeals, the judgment becomes final upon the expiration of the period in which the defendant could have appealed to the court of appeals, even when no notice of appeal was filed.” The Ninth Circuit reached the same result in United States v. Schwartz, 274 F.3d 1220, 1223 (9th Cir. 2001), the Tenth in United States v. Prows, 448 F.3d 1223, 1227–28 (10th Cir. 2006), and the Eighth in Anjulo-Lopez v. United States, 541 F.3d 814, 816 n.2 (8th Cir. 2008).

Two traps in this scenario, and both are expensive.

First, the number is 14, not 10. Fed. R. App. P. 4(b)(1)(A) allowed 10 days until the 2009 time-computation amendments. A great deal of published material — including older opinions that are still perfectly good law on the principle — states the finality date as ten days after judgment. Computing from 10 gives a date four days early. That is not fatal to a movant, but it means any source using it is out of date, and the same sources are frequently out of date about other things.

A related situation is worth separating out, because it changes the claim rather than the date: if you asked your lawyer to file a notice of appeal and no appeal was ever filed, the missing appeal is itself a potential ground for relief, with its own presumed-prejudice rule. That is a different question from when your clock started, and it is answered at my lawyer never filed the appeal I asked for.

Second, the possibility of an extension does not, by itself, push the date out. Fed. R. App. P. 4(b)(4) lets a district court, “[u]pon a finding of excusable neglect or good cause … extend the time to file a notice of appeal for a period not to exceed 30 days.” The Sixth Circuit held in Sanchez-Castellano that this does not make every unappealed judgment final at forty days, reasoning that the extension “is only granted upon request to the district court, and then only on a showing that most litigants presumably cannot make.” The court noted it had “found no case law to guide us” on the point, and Judge Cohn dissented, arguing that “[o]nly when the time for seeking an appeal has been exhausted can the conviction be said to be ‘final.'” This is unsettled, not settled. If a Rule 4(b)(4) extension was actually sought or granted in your case, the finality date is a real question and the safe course is to compute from the shorter period.

Does the 90-day certiorari period count?

Yes — if you took a direct appeal and the court of appeals ruled, the 90 days you had to seek certiorari are part of your finality date whether or not you used them. That is the holding of Clay, and it is worth roughly three additional months on the deadline.

The number comes from Sup. Ct. R. 13(1), which gives a petitioner 90 days from entry of the judgment sought to be reviewed. Two details decide real cases:

• It runs from entry of the court of appeals’ judgment, not from the mandate. In Clay, the mandate issued 21 days after judgment, and starting from the mandate would have cost the movant 21 days.
• A timely petition for rehearing changes the start date of the certiorari window under Sup. Ct. R. 13(3), so a case with a rehearing petition needs its dates re-derived rather than assumed.

The 90 days do not apply where there was no appellate judgment to seek review of. A defendant who never appealed has no certiorari window, which is exactly why the two scenarios produce dates roughly three and a half months apart on otherwise identical facts.

When does the clock start on a new Supreme Court case?

On the day the Supreme Court decided the case — not on the later day a court held it retroactive. This is the single most damaging misunderstanding in this entire area, and it is the reason people who are plainly entitled to relief lose on timeliness.

Section 2255(f)(3) runs from “the date on which the right asserted was initially recognized by the Supreme Court, if that right has been newly recognized by the Supreme Court and made retroactively applicable to cases on collateral review.” Dodd v. United States, 545 U.S. 353 (2005), addressed exactly the argument that the clock should run from the retroactivity ruling, and rejected it:

“It unequivocally identifies one, and only one, date from which the 1-year limitation period is measured: ‘the date on which the right asserted was initially recognized by the Supreme Court.’ … What Congress has said in ¶ 6(3) is clear: An applicant has one year from the date on which the right he asserts was initially recognized by this Court.”

The Court explained the grammar. The retroactivity language “imposes a condition on the applicability of this subsection” — it decides whether (f)(3) is available at all — but “[a]s long as the conditions in the second clause are satisfied so that ¶ 6(3) applies in the first place, that clause has no impact whatsoever on the date from which the 1-year limitation period in ¶ 6(3) begins to run.”

Dodd acknowledged where this leads: “[a]lthough we recognize the potential for harsh results in some cases, we are not free to rewrite the statute that Congress has enacted.” The harsh result is concrete. Retroactivity litigation routinely takes more than a year. A movant who waits for a definitive retroactivity ruling before filing can find the (f)(3) year already closed by the time it arrives.

The practical rule that follows: file within one year of the Supreme Court’s decision, and argue retroactivity in the motion. Do not wait for someone else to establish it.

Two limits worth stating precisely. Dodd expressly did not decide who may make the retroactivity determination for (f)(3) purposes — the Supreme Court itself or a lower court. Section 2255(h)(2) requires the Supreme Court, but that provision governs second or successive 2255 motions, not the (f)(3) limitations trigger. And Dodd also confirms that “[t]he limitation period in ¶ 6(3) applies to ‘all motions’ under §2255, initial motions as well as second or successive ones.” Whether a particular decision applies to an already-final conviction at all is worked through at retroactive Supreme Court decisions.

Can different claims have different deadlines?

Yes. Section 2255(f) sets a limitation period for the motion, but subsections (f)(3) and (f)(4) are keyed to facts and rights that are specific to individual claims. The predictable result is a single motion in which the ineffective-assistance claim is governed by one date and the newly-discovered-evidence claim by another.

Subsection (f)(4) runs from “the date on which the facts supporting the claim or claims presented could have been discovered through the exercise of due diligence.” Note the exact words. It is not the date you actually found out. It is the date a reasonably diligent person in your position could have found out — an objective standard the court applies against the record, which is why a (f)(4) argument requires an affidavit or declaration setting out what was done, when, and why it could not have been done sooner. Note also that the statute itself says “the claim or claims,” which is the textual basis for claim-by-claim computation.

Two operational consequences follow, and both are counterintuitive.

A late-discovered claim does not revive expired claims. If the (f)(1) year ran out in 2025 and you discover new facts in 2026, the new claim is timely and the old claims are not. The new facts do not reopen the motion generally.

A timely-filed motion does not preserve claims you have not pleaded. Under Rule 2(b) of the Rules Governing Section 2255 Proceedings, the motion “must … specify all the grounds for relief available to the moving party” and “state the facts supporting each ground.” An amendment filed after the deadline relates back only under Fed. R. Civ. P. 15(c), and Mayle v. Felix, 545 U.S. 644 (2005), holds that an amended petition “does not relate back … when it asserts a new ground for relief supported by facts that differ in both time and type from those the original pleading set forth.” Relation back “depends on the existence of a common ‘core of operative facts.'” A skeletal placeholder motion does not hold open a claim you did not describe.

In practice, (f)(4) does most of its work on two claim types. Suppressed-evidence claims under Brady v. Maryland are the classic case, because the whole premise is that the government withheld the facts — covered at brady violation. Ineffective-assistance claims are the other, where what was discoverable often depends on when the movant obtained the trial file; the substantive standard for those claims lives at Strickland v. Washington. If your new information is evidence of innocence rather than a constitutional violation, the vehicle question comes first, at newly discovered evidence in federal court.

Applied Insight — Elizabeth Franklin-Best, Esq., Principal Attorney: When we take on a §2255 matter, the first document we build is a dated chronology from the docket sheet — judgment entered, notice of appeal filed or not, court of appeals judgment entered, mandate, certiorari petition or the expiration of the window, any amended judgment — with a computed date beside each entry. It is unglamorous and it is the single highest-value hour in the case, because the answer is either “you have time” or “we are filing this week,” and nothing else about the strategy can be decided until you know which.

Six worked examples

Every example below is computed from real dates. Substitute your own and the arithmetic is the same.

Table 1. Computing the §2255(f) deadline — six worked fact patterns with the governing trigger and the resulting date.

Fact pattern	Triggering event under §2255(f)	Date the clock starts	Filing deadline
A. No direct appeal. Judgment entered on the criminal docket Tuesday, March 4, 2025. No notice of appeal filed, no Rule 4(b)(4) extension sought.	§2255(f)(1) — finality on expiration of the 14-day notice-of-appeal period, Fed. R. App. P. 4(b)(1)(A)(i)	March 18, 2025 (March 4 + 14 days)	March 18, 2026
B. Appeal affirmed, no certiorari petition. Court of appeals enters judgment affirming Friday, June 6, 2025. No certiorari petition filed.	§2255(f)(1) — finality on expiration of the 90-day certiorari window, Clay v. United States, 537 U.S. 522 (2003); Sup. Ct. R. 13(1)	September 4, 2025 (June 6 + 90 days, running from entry of judgment, not the mandate)	September 4, 2026
C. Certiorari petition denied. Supreme Court denies certiorari Monday, October 6, 2025.	§2255(f)(1) — finality on the date certiorari is denied, Clay, 537 U.S. at 527	October 6, 2025	October 6, 2026
D. New Supreme Court decision. The Court recognizes a new right on Monday, June 23, 2025. A court of appeals holds it retroactive on March 10, 2026.	§2255(f)(3) — runs from the date the right was initially recognized, Dodd v. United States, 545 U.S. 353 (2005)	June 23, 2025 — not March 10, 2026	June 23, 2026 (the retroactivity ruling does not extend it)
E. Newly discovered facts, different claims. Judgment final Monday, February 12, 2024. In August 2025 the movant learns of an undisclosed cooperation agreement with a government witness; the court finds it could not have been discovered with diligence before Tuesday, August 12, 2025.	§2255(f)(1) for the original claims; §2255(f)(4) for the suppressed-evidence claim	Original claims: February 12, 2024. New claim: August 12, 2025	Original claims: February 12, 2025 (expired). New claim: August 12, 2026
F. Deferred restitution, amended judgment. Custodial judgment entered May 5, 2025 with restitution deferred; amended judgment adding the restitution amount entered Monday, August 4, 2025. No appeal.	§2255(f)(1) — finality runs from the amended judgment, Montez Lee, Jr. v. United States, 149 F.4th 981 (8th Cir. 2025); accord United States v. Anthony, 25 F.4th 792, 802 (10th Cir. 2022)	August 18, 2025 (August 4 + 14 days)	August 18, 2026 — roughly three months later than computing from the May 5 judgment

Sources: 28 U.S.C. §2255(f); Fed. R. App. P. 4(b)(1)(A), 4(b)(4), 4(b)(6); Sup. Ct. R. 13(1), 13(3); Clay v. United States, 537 U.S. 522 (2003); Dodd v. United States, 545 U.S. 353 (2005); Montez Lee, Jr. v. United States, 149 F.4th 981 (8th Cir. 2025). Row F states the rule in the Second, Eighth, and Tenth Circuits; the law of the circuit in which the sentence was imposed governs. Examples are illustrative and are not a computation of any reader’s deadline.

What is a government-created impediment under §2255(f)(2)?

Subsection (f)(2) is the least-used trigger and the most misunderstood. It starts the clock on “the date on which the impediment to making a motion created by governmental action in violation of the Constitution or laws of the United States is removed, if the movant was prevented from making a motion by such governmental action.”

Read the two conditions. The government action must itself be unlawful — an ordinary institutional inconvenience does not qualify, however genuinely inconvenient. And the action must have actually prevented the filing, not merely made it harder. A movant relying on (f)(2) has to establish both, with dates.

What courts look at in practice is whether the movant was deprived of something without which the motion could not be prepared at all, and whether the deprivation was itself unlawful — a complete and unjustified denial of access to legal materials, or the withholding of the record. A lockdown, a transfer, a period without law library access, or the loss of a jailhouse assistant are the sorts of facts that get argued; whether any of them clears the bar depends entirely on duration, cause, and what the movant did in response.

If your facts are about hardship rather than unlawful government action, the doctrine you need is not (f)(2). It is equitable tolling, which asks a different question — diligence plus an extraordinary circumstance — and is the page that owns the deadline-already-missed problem.

Do a compassionate release motion, clemency petition, or administrative remedy toll the clock?

No. None of them. This is the most costly single misunderstanding on this page, and it is worth stating without qualification: nothing you file anywhere else stops the §2255 clock.

Read §2255(f) again and check the list. The period runs from the latest of four events: finality of the judgment, removal of an unlawful government impediment, the date the Supreme Court recognized a new retroactive right, or the date supporting facts became discoverable. A pending motion is not on that list. There is no statutory tolling provision in §2255(f) for any other proceeding — not a motion under 18 U.S.C. §3582(c)(1)(A), not a clemency or commutation petition, not a Bureau of Prisons administrative remedy, and not an ongoing investigation by new counsel.

The compassionate-release version of this mistake is especially common, and Fernandez v. United States, 608 U.S. 411, 146 S. Ct. 1292 (2026), makes it worse rather than better. Fernandez holds that “[a] prisoner who collaterally attacks the validity of his conviction must proceed through 28 U. S. C. §2255, not 18 U. S. C. §3582.” So a prisoner who spends a year litigating conviction-validity arguments inside a §3582 motion has been in the wrong vehicle and has watched the right one close. What is left after that has happened is set out at 2255 after compassionate release denial.

The same logic applies to the other direction of confusion: a §2241 petition challenging how the Bureau of Prisons is executing the sentence is a different proceeding in a different court and does not affect this deadline either. Which statute fits which complaint is sorted at 28 U.S.C. § 2241.

Applied Insight — Christopher Zoukis, JD, MBA, Managing Director: In consulting work I see this from the inside constantly — someone spends eighteen months on administrative remedies or a compassionate-release filing, entirely in good faith, on the assumption that having something pending protects them. It does not. The §2255 clock and every other post-conviction clock run in parallel, independently. When a client’s timeline is tight, the sequencing question goes to Elizabeth and the firm’s attorneys immediately, because which motion gets filed first is a legal judgment with a permanent consequence.

Does a resentencing or an amended judgment restart the clock?

Sometimes — and the answer turns on whether the new judgment is a real sentencing event or a paperwork correction.

The clearest current authority is Montez Lee, Jr. v. United States, 149 F.4th 981 (8th Cir. 2025). Where a district court defers restitution and later amends the judgment to add it, the Eighth Circuit held that finality for §2255(f)(1) does not attach until the amended judgment issues, because “[b]y deferring restitution, the court is declining to announce a sentence,” and “the sentence is the judgment” for postconviction finality purposes. The court aligned itself “[i]n line with the Second and Tenth Circuits,” citing United States v. Anthony, 25 F.4th 792, 802 (10th Cir. 2022): “while there can be multiple judgments in a deferred restitution case for direct appeal purposes, only one final judgment exists for §2255(f)(1) purposes.” As Table 1 row F shows, on realistic facts this can move the deadline by months.

The opinion is equally clear about what does not restart the clock:

• Ministerial corrections. “Fixing typographical errors and the like does not substantively alter a prisoner’s sentence.” Updating a payee’s address, or conforming the written judgment to reflect joint-and-several liability already imposed, does not create a new judgment.
• Rule 35(b) reductions. A discretionary sentence reduction on the government’s motion, made after the judgment has already become final, does not redefine the “judgment of conviction” for §2255(f) purposes.

Two cautions. First, this is circuit law, and the circuit that matters is the one containing the district that imposed the sentence. Second, if a new judgment does start a new clock, it may also affect whether a later motion is second or successive — a separate question governed by second or successive 2255, not by this page. A full plenary resentencing raises the same question in sharper form and should be analyzed on its own facts.

What counts as filed if I am in prison?

Delivery to the prison mail system, not receipt by the clerk. Rule 3(d) of the Rules Governing Section 2255 Proceedings states the rule and, unusually for this area, states the proof requirement too:

“A paper filed by an inmate confined in an institution is timely if deposited in the institution’s internal mailing system on or before the last day for filing. If an institution has a system designed for legal mail, the inmate must use that system to receive the benefit of this rule. Timely filing may be shown by a declaration in compliance with 28 U.S.C. §1746 or by a notarized statement, either of which must set forth the date of deposit and state that first-class postage has been prepaid.”

Three requirements, all mandatory:

1. Use the legal-mail system if the institution has one. The rule says “must.” Dropping a §2255 motion in general outgoing mail at an institution with a legal-mail system forfeits the benefit of the rule.
2. Attach a declaration or notarized statement. Under 28 U.S.C. §1746, an unsworn declaration carries “like force and effect” as a sworn affidavit if it is “subscribed by him, as true under penalty of perjury, and dated,” in substantially this form for a declaration executed inside the United States: “I declare (or certify, verify, or state) under penalty of perjury that the foregoing is true and correct. Executed on (date). (Signature).”
3. State the date of deposit and that first-class postage has been prepaid. Both facts, expressly. A declaration that omits the postage statement does not comply with the rule as written.

The rule descends from Houston v. Lack, 487 U.S. 266 (1988), where the Supreme Court held a pro se prisoner’s notice of appeal filed on delivery to prison officials. The reasoning still explains why the rule exists: a prisoner’s “control over the processing of his notice necessarily ceases as soon as he hands it over to the only public officials to whom he has access — the prison authorities.” The Court also noted why the rule is administrable — prison mail logs make the date verifiable, so “making filing turn on the date the pro se prisoner delivers the notice to prison authorities for mailing is a bright-line rule, not an uncertain one.” The mechanics and the evidentiary practice are covered in full at prisoner mailbox rule.

Keep a copy of the legal-mail log entry or the receipt. When timeliness is contested, that record is the case.

What to do if the deadline is days away

File. A timely imperfect motion is a live case; an untimely perfect one usually is not.

• File on the standard form. Rule 2(c) of the Rules Governing Section 2255 Proceedings requires the motion to “substantially follow either the form appended to these rules or a form prescribed by a local district-court rule,” and directs that “[t]he clerk must make forms available to moving parties without charge.” There is no filing fee for a §2255 motion.
• Plead every ground you know about, with its facts. Rule 2(b) requires the motion to “specify all the grounds for relief available to the moving party” and “state the facts supporting each ground.” This is the step that cannot be deferred: under Mayle v. Felix, 545 U.S. 644 (2005), a later amendment relates back only where it shares a “common core of operative facts” with what you actually pleaded. A ground you did not describe is, for limitations purposes, a ground you did not file. A short factual paragraph per ground now is worth far more than a polished brief filed a week late. If you are unsure what qualifies, work from grounds for a 2255 motion rather than leaving a ground out.
• Follow the filing mechanics exactly. Where the motion goes, how many copies, and what has to accompany it are set out at how to file a 2255 motion; what happens on the other end is at what happens after filing a 2255.
• Sign under penalty of perjury. Rule 2(b)(5) requires it, and an unsigned motion invites a correction cycle you do not have time for.
• Use the legal-mail system and attach the Rule 3(d) declaration, with the date of deposit and the prepaid-postage statement.
• Do not wait on counsel, records, or transcripts to arrive. Missing documents are a reason to file and then supplement. They are not a reason to file late, and they are rarely enough on their own to support equitable tolling.

If the date has already passed, the remaining arguments are equitable tolling and the actual innocence gateway. Both are narrow, and both are stronger the sooner the motion is filed after the obstacle clears.

Why work with Elizabeth Franklin-Best, P.C.

Elizabeth Franklin-Best, P.C. is a boutique federal criminal defense and appellate firm founded in 2019, running a national federal practice on an intentionally small caseload. Elizabeth Franklin-Best has more than 20 years of federal and appellate criminal defense experience, has handled more than 330 federal proceedings, over 100 of them appeals, and has sixteen published decisions as counsel of record. She is admitted to the U.S. Supreme Court and twelve of the thirteen U.S. Courts of Appeals — every regional circuit (1st–11th) plus the D.C. Circuit — and has been admitted pro hac vice in federal courts from Montana to Florida. She is recognized by Best Lawyers in America 2026 for Appellate Practice and ranked by Chambers USA 2026 for Litigation: White-Collar Crime & Government Investigations.

Deadline computation is circuit-specific work. Whether an amended judgment restarts the clock, and what a Rule 4(b)(4) extension does to a finality date, are questions with different answers in different circuits — which is why a nationwide federal practice matters on a page like this one. With offices in Columbia and Mount Pleasant, South Carolina, the firm represents clients in federal districts across the country. A §2255 motion is filed where the sentence was imposed, wherever that is.

Get your deadline computed

If you are not certain what your §2255 deadline is, that is the question to answer first, before anything about the merits. It takes the judgment, the docket sheet, and the dates from the direct appeal.

Schedule a consultation directly, or call (843) 620-1100. If you are early in the process, what is a 2255 motion explains the statute itself, post conviction relief explains what relief can actually change, and federal 2255 motion lawyer covers what post-conviction counsel actually does. If the direct appeal is already over and you are looking for representation, start at post conviction attorney.

The §2255(f)(4) due-diligence standard

Subsection (f)(4) starts the clock on “the date on which the facts supporting the claim or claims presented could have been discovered through the exercise of due diligence.” Every word of that is doing work, and it is the trigger people misread most often.

It runs from discoverability, not discovery. The clock does not wait until you actually learned the fact. It starts when a duly diligent person in your position could have learned it. Telling a court you found out last month does not answer the question; the court asks when you could have.

Diligence is measured from the prisoner’s actual position, not an ideal one — but incarceration alone does not excuse inaction, and neither does not knowing the legal significance of a fact you already had.

It is facts, not law. A new legal theory about facts you already knew is not a (f)(4) trigger. A new Supreme Court decision belongs to (f)(3), and only if the Court made the right retroactive on collateral review. If neither applies, the claim is measured from finality of judgment under (f)(1).

It is claim-by-claim. Subsection (f)(4) is applied to each ground separately, which is the mechanism behind different deadlines for different claims in the same motion — see “Can different claims have different deadlines?” above.

The practical consequence: if a ground depends on a fact you learned late, plead the discovery story in the motion itself — what the fact is, when you learned it, why you could not have learned it sooner, and what you did once you had it. A court cannot apply (f)(4) to a record that does not contain those facts.

Frequently Asked Questions About the § 2255 Deadline

Reviewed for legal accuracy by Elizabeth Franklin-Best, Esq., Principal Attorney·September 2026