delivered the opinion of the Court.

This case presents the question whether a federal habeas court is barred from considering an ineffective-assistanee-of-counsel claim as “cause” for the procedural default of another claim when the ineffective-assistance claim has itself been procedurally defaulted.

I

Respondent was indicted by an Ohio grand jury for aggravated murder and aggravated robbery. He entered a guilty plea while maintaining his innocence — a procedure we held to be constitutional in North Carolina v. Alford, 400 U. S. 25 (1970)—in exchange for the prosecution’s agreement that the guilty plea could be withdrawn if the three-judge panel that accepted it elected, after a mitigation hearing, to impose the death penalty. The panel accepted respondent’s plea based on the prosecution’s recitation of the evidence supporting the charges and, following a mitigation hearing, sentenced him to life imprisonment with parole eligibility after 30 years on the aggravated-murder count and to a concurrent term of 10 to 25 years on the aggravated-robbery count. On direct appeal respondent, represented by new counsel, assigned only the single error that the evidence offered in mitigation established that he should have been *449eligible for parole after 20 rather than BO years. The Ohio Court of Appeals affirmed, and respondent did not appeal to the Ohio Supreme Court.

After unsuccessfully pursuing state postconviction relief pro se, respondent, again represented by new counsel, filed an application in the Ohio Court of Appeals to reopen his direct appeal, pursuant to Ohio Rule of Appellate Procedure 26(B),1 on the ground that his original appellate counsel was constitutionally ineffective in failing to raise on direct appeal a challenge to the sufficiency of the evidence. The appellate court dismissed the application because respondent had failed to show, as the rule required, good cause for filing after the 90-day period allowed.2 The Ohio Supreme Court, in a one-sentence per curiam opinion, affirmed. State v. Carpenter, 74 Ohio St. 3d 408, 659 N. E. 2d 786 (1996).

On May 3,1996, respondent filed a petition for writ of ha-beas corpus in the United States District Court for the Southern District of Ohio, alleging, inter alia, that the evidence supporting his plea and sentence was insufficient, in violation of the Fifth and Fourteenth Amendments, and that his appellate counsel was constitutionally ineffective in failing to raise that claim on direct appeal. Concluding that respondent’s sufficiency-of-the-evidence claim was procedurally defaulted, the District Court considered next whether the ineffective-assistanee-of-counsel claim could *450serve as cause excusing that default. The District Court acknowledged that the ineffective-assistance claim had been dismissed on procedural grounds, but concluded that Rule 26(B)’s inconsistent application by the Ohio courts rendered it inadequate to bar federal habeas review. See Ford v. Georgia, 498 U. S. 411, 423-424 (1991) (state procedural default is not an “independent and adequate state ground” barring subsequent federal review unless the state rule was “ ‘firmly established and regularly followed’ ” at the time it was applied). Proceeding to the merits of the ineffective-assistance claim, the District Court concluded that respondent’s appellate counsel was constitutionally ineffective under the test established in Strickland v. Washington, 466 U. S. 668 (1984), and granted the writ of habeas corpus conditioned on the state appellate court’s reopening of respondent’s direct appeal of the sufficiency-of-the-evidence claim.

On cross-appeals, the United States Court of Appeals for the Sixth Circuit held that respondent’s ineffeetive-assistance-of-counsel claim served as “cause” to excuse the procedural default of his sufficiency-of-the-evidence claim, whether or not the ineffective-assistance claim itself had been proeedurally defaulted. Carpenter v. Mohr, 163 F. 3d 938 (CA6 1998). In the panel’s view, it sufficed that respondent had exhausted the ineffective-assistance claim by presenting it to the state courts in his application to reopen the direct appeal, even though that application might, under Ohio law, have been time barred. Finding in addition prejudice from counsel’s failure to raise the sufficiency-of-the-evidence claim on direct appeal, the Sixth Circuit directed the District Court to issue the writ of habeas corpus conditioned upon the state court’s according respondent a new culpability hearing. We granted certiorari. 528 U. S. 985 (1999).

II

Petitioner contends that the Sixth. Circuit erred in failing to recognize that a proeedurally defaulted ineffective-*451assistance-of-counsel claim can serve as cause to excuse the procedural default of another habeas claim only if the ha-beas petitioner can satisfy the “cause and prejudice” standard with respect to the ineffective-assistance claim itself. We agree.

The procedural default doctrine and its attendant “cause and prejudice” standard are “grounded in concerns of comity and federalism,” Coleman v. Thompson, 501 U. S. 722, 730 (1991), and apply alike whether the default in question occurred at trial, on appeal, or on state collateral attack, Murray v. Carrier, 477 U. S. 478, 490-492 (1986). “[A] habeas petitioner who has failed to meet the State’s procedural requirements for presenting his federal claims has deprived the state courts of an opportunity to address those claims in the first instance.” Coleman, 501 U. S., at 732. We therefore require a prisoner to demonstrate cause for his state-court default of any federal claim, and prejudice therefrom, before the federal habeas court will consider the merits of that claim. Id., at 750. The one exception to that rule, not at issue here, is the circumstance in which the habeas petitioner can demonstrate a sufficient probability that our failure to review his federal claim will result in a fundamental miscarriage of justice. Ibid.

Although we have not identified with precision exactly what constitutes “cause” to excuse a procedural default, we have acknowledged that in certain circumstances counsel’s ineffectiveness in failing properly to preserve the claim for review in state court will suffice. Carrier, 477 U. S., at 488-489. Not just any deficiency in counsel’s performance will do, however; the assistance must have been so ineffective as to violate the Federal Constitution. Ibid. In other words, ineffective assistance adequate to establish cause for the procedural default of some other constitutional claim is itself an independent constitutional claim. And we held in Carrier that the principles of comity and federalism that underlie our longstanding exhaustion doctrine — then as *452now codified in the federal habeas statute, see 28 U. S. C. §§ 2254(b), (c) — require that constitutional claim, like others, to be first raised in state court. “[A] claim of ineffective assistance,” we said, generally must “be presented to the state courts as an independent claim before it may be used to establish cause for a procedural default.” Carrier, supra, at 489.

The question raised by the present case is whether Carrier’s exhaustion requirement for claims of ineffective assistance asserted as cause is uniquely immune from the procedural-default rule that accompanies the exhaustion requirement in all other contexts — whether, in other words, it suffices that the ineffective-assistance claim was “presented” to the state courts, even though it was not presented in the manner that state law requires. That is not a hard question. An affirmative answer would render Carrier’s exhaustion requirement illusory.3

We recognized the inseparability of the exhaustion rule and the procedural-default doctrine in Coleman: “In the absence of the independent and adequate state ground doctrine in federal habeas, habeas petitioners would be able to avoid the exhaustion requirement by defaulting their federal claims in state court. The independent and adequate state *453ground doctrine ensures that the States’ interest in correcting their own mistakes is respected in all federal habeas eases.” 501 U. S., at 732. We again considered the interplay between exhaustion and procedural default last Term in O’Sullivan v. Boerckel, 526 U. S. 838 (1999), concluding that the latter doctrine was necessary to “ ‘protect the integrity’ of the federal exhaustion rule.” Id., at 848 (quoting id., at 853 (Stevens, J., dissenting)). The purposes of the exhaustion requirement, we said, would be utterly defeated if the prisoner were able to obtain federal habeas review simply by “ ‘letting the time run’ ” so that state remedies were no longer available. Id., at 848. Those purposes would be no less frustrated were we to allow federal review to a prisoner who had presented his claim to the state court, but in such a manner that the state court could not, consistent with its own procedural rules, have entertained it. In such circumstances, though the prisoner would have “concededly exhausted his state remedies,” it could hardly be said that, as comity and federalism require, the State had been given a “fair ‘opportunity to pass upon [his claims].’” Id., at 854 (Stevens, J., dissenting) (emphasis added) (quoting Darr v. Burford, 339 U. S. 200, 204 (1950)).

To hold, as we do, that an ineffective-assistance-of-counsel claim asserted as cause for the procedural default of another claim can itself be procedurally defaulted is not to say that that procedural default may not itself be excused if the prisoner can satisfy the eause-and-prejudiee standard with respect to that claim. Indeed, the Sixth Circuit may well conclude on remand that respondent can meet that standard in this case (although we should note that respondent has not argued that he can, preferring instead to argue that he does not have to). Or it may conclude, as did the District Court, that Ohio Rule of Appellate Procedure 26(B) does not constitute an adequate procedural ground to bar federal habeas review of the ineffective-assistance claim. We express no view as to these issues, or on the question *454whether respondent’s appellate counsel was constitutionally ineffective in not raising the sufficiency-of-the-evidence claim in the first place.

* * *

For the foregoing reasons, the judgment of the Court of Appeals for the Sixth Circuit is reversed, and the ease is remanded for further proceedings consistent with this opinion.

It is so ordered.

with whom Justice Stevens joins, concurring in the judgment.

I believe the Court of Appeals correctly decided the basic question: “Whether a federal habeas court is barred from considering an ineffective-assistance-of-counsel claim as ‘cause’ for the procedural default of another claim when the ineffective-assistance claim is itself proeedurally defaulted.” The question’s phrasing itself reveals my basic concern. Although the question, like the majority’s opinion, is written with clarity, few lawyers, let alone unrepresented state prisoners, will readily understand it. The reason lies in the complexity of this Court’s habeas corpus jurisprudence — a complexity that in practice can deny the fundamental constitutional protection that habeas corpus seeks to assure. Today’s decision unnecessarily adds to that complexity and cannot be reconciled with our consistent recognition that the determination of “cause” is a matter for the federal habeas judge.

To explain why this is so, and at the risk of oversimplification, I must reiterate certain elementary ground rules. A federal judge may issue a writ of habeas corpus freeing a state prisoner, if the prisoner is “in custody in violation of the Constitution or laws or treaties of the United States.” 28 U. S. C. § 2254(a). However, the judge may not issue the writ if an adequate and independent state-law ground justifies the prisoner’s detention, regardless of the federal claim. *455See Wainwright v. Sykes, 433 U. S. 72, 81-88 (1977). One “state ground” often asserted as an adequate, independent basis for holding a state prisoner in custody is a state-law “procedural default,” such as the prisoner’s failure to raise his federal claim at the proper time. However, under certain conditions the State’s assertion of such a ground is not “adequate” (and consequently does not bar assertion of the federal-law claim). There are three situations in which an otherwise valid state ground will not bar federal claims: (1) where failure to consider a prisoner’s claims will result in a “fundamental miscarriage of justice,” Coleman v. Thompson, 501 U. S. 722, 750 (1991); (2) where the state procedural rule was not “'firmly established and regularly followed,’ ” Ford v. Georgia, 498 U. S. 411, 423-424 (1991); James v. Kentucky, 466 U. S. 341, 348-349 (1984); and (3) where the prisoner had good “cause” for not following the state procedural rule and was “prejudiced] ” by not having done so, Sykes, supra, at 87.

Ordinarily, a federal habeas judge, while looking to state law to determine the potential existence of a procedural ground that might bar consideration of the prisoner’s federal claim, decides whether such a ground is adequate as a matter of federal law. See Ford, supra; James, supra; Coleman, supra. Thus the Court has applied federal standards to determine whether there has been a “fundamental miscarriage of justice.” See, e. g., Schlup v. Delo, 513 U. S. 298, 314-317 (1995). And the Court has also looked to state practice to determine the factual circumstances surrounding the application of a state procedural rule, while determining as a matter of federal law whether that rule is “firmly established [and] regularly followed.” Ford, supra, at 424-425. Federal habeas courts would normally determine whether “cause and prejudice” excuse a “procedural default” in the same manner. Murray v. Carrier, 477 U. S. 478, 489 (1986) (“[T]he question of cause” is “a question of federal law”).

*456If I could stop here, the rules would be complicated, but still comprehensible. The federal habeas judge would look to state law and state practice to determine the facts and circumstances surrounding a state procedural rule that the State claims is an “adequate and independent state ground.” However, the federal judge would determine the adequacy of that “state ground” as a matter of federal law.

Unfortunately, the rules have become even more complex. In Carrier, the Court considered a prisoner’s contention that he had “cause” for failing to follow a state procedural rule — a rule that would have barred his federal claim. The “cause,” in the prisoner’s view, was that his lawyer (who had failed to follow the state procedural rule) had performed inadequately. This Court determined, as a matter of federal law, that only a performance so inadequate that it violated the defendant’s Sixth Amendment right to effective assistance of counsel could amount to “cause” sufficient to overcome a “procedural default.” Id., at 488-489. That being so, the Court reasoned, the prisoner should have to exhaust the ineffectiveness claim in state court. The Court wrote:

“[I]f a petitioner could raise his ineffective assistance claim for the first time on federal habeas in order to show cause for a procedural default, the federal habeas court would find itself in the anomalous position of adjudicating an unexhausted constitutional claim for which state court review might still be available.” Id., at 489.

And today the Court holds not only that the prisoner must exhaust this claim by presenting it to the state courts, but also that his failure to do so properly, i. e., a failure to comply with the State’s rules for doing so, bars that prisoner from ever asserting that claim as a “cause” for not having complied with state procedural rules.

The opinion in Carrier raises a special kind of “exhaustion” problem. The Court considered a type of “cause” (“in*457effective assistance”) for not following the state procedural rule that happened itself independently to constitute a violation of the Federal Constitution. After all, were the prisoner to prove his claim (i e., show “ineffective assistance”), the State might want to take action first. Ordinary exhaustion rules assure States an initial opportunity to pass upon claims of violation of the Federal Constitution. Why should a State not have a similar opportunity in this situation? As the Carrier Court pointed out, it would be “anomalous” for a federal habeas court to “adjudicate] an unexhausted constitutional claim for which state court review might still be available.” Ibid.

The anomaly disappears, however, once the prisoner has exhausted his “ineffective-assistance” claim (which appeared in the guise of a “cause”). And there is no other anomaly that requires the majority’s result. Once a claim of ineffective assistance of counsel has been exhausted — either through presentation in the state courts or through procedural default — there is no difference between that claim and any other claim of “cause” for the prisoner’s original procedural default. The federal habeas court is no longer in the “anomalous position” of considering as cause an independent claim that might yet be considered by the state courts, for there is no longer any possibility that the state courts will consider the claim. There is thus no more reason to hold that procedural default of an ineffective-assistance claim bars the prisoner from raising that ineffective-assistance claim as a “cause” (excusing a different procedural default asserted as a bar to a basic constitutional claim) than there is to bar any other claim of “cause” on grounds of procedural default. The majority creates an anomaly; it does not cure one.

The added complexity resulting from the Court’s opinion is obvious. Consider a prisoner who wants to assert a federal constitutional claim (call it FCC). Suppose the State asserts *458as a claimed “adequate and independent state ground” the prisoner’s failure to raise the matter on his first state-court appeal. Suppose further that the prisoner replies by alleging that he had “cause” for not raising the matter on appeal (call it C). After Carrier, if that alleged “cause” (C) consists of the claim “my attorney was constitutionally ineffective,” the prisoner must have exhausted C in the state courts first. And after today, if he did not follow state rules for presenting C to the state courts, he will have lost his basic claim, FCC, forever. But, I overstate. According to the opinion of the Court, he will not necessarily have lost FCC forever if he had “cause” for not having followed those state rules (i e., the rules for determining the existence of “cause” for not having followed the state rules governing the basic claim, FCC) (call this “cause” C*). Ante, at 453. The prisoner could therefore still obtain relief if he could demonstrate the merits of C*, C, and FCC.

I concede that this system of rules has a certain logic, indeed an attractive power for those who like difficult puzzles. But I believe it must succumb to this question: Why should a prisoner, who may well be proceeding pro se, lose his basic claim because he runs afoul of state procedural rules governing the presentation to state courts of the “cause” for his not having followed state procedural rules for the presentation of his basic federal claim? And, in particular, why should that special default rule apply when the “cause” at issue is an “ineffective-assistance-of-counsel” claim, but not when it is any of the many other “causes” or circumstances that might excuse a failure to comply with state rules? I can find no satisfactory answer to these questions.

I agree with the majority, however, that this case must be returned to the Court of Appeals. Although the prisoner’s “ineffective-assistance” claim is not barred, he still must prove that the “assistance” he received was “ineffective” (or some other “cause”). And, if he does so, he still must prove his basic claim that his trial violated the Federal Con*459stitution — all before he can secure habeas relief, I would remand for consideration of these matters.

For these reasons, I concur in the judgment.