Justice Souter
delivered the opinion of the Court.
The authority of the Courts of Appeals to review “all final decisions of the district courts,” 28 U. S. C. § 1291, includes appellate jurisdiction over “a narrow class of decisions that do not terminate the litigation,” but are sufficiently important and collateral to the merits that they should “nonetheless be treated as final,” Digital Equipment Corp. v. Desktop Direct, Inc., 511 U. S. 863, 867 (1994) (internal quotation marks omitted). The issue here is whether a refusal to apply the judgment bar of the Federal Tort Claims Act is open to collateral appeal. We hold it is not.
I
The complaint alleges that Susan Hallock owned a computer software business that she and her husband, Richard, operated from home. After information about Richard Hal-lock’s credit card was stolen and used to pay the subscription fee for a child pornography Web site, agents of the United States Customs Service, investigating the Web site, traced the payment to Richard Hallock’s card and got a warrant to search the Halloeks’ residence. With that authority, they seized the Halloeks’ computer equipment, software, and disk drives. No criminal charges were ever brought, but the Government’s actions produced a different disaster. When the computer equipment was returned, several of the disk drives were damaged, all of the stored data (including trade secrets and account files) were lost, and the Halloeks were forced out of business.
In July 2002, Susan Hallock and her company brought an action against the United States under the Federal Tort Claims Act, invoking the waiver of sovereign immunity, 28 U. S. C. § 1346, and alleging negligence by the customs agents in executing the search. The merits of the claim were never addressed, for the District Court granted the Government’s motion to dismiss, holding that the agents’ activities occurred in the course of detaining goods and thus fell within an exception to the Act’s waiver of sovereign immunity, § 2680(e). Hallock v. United States, 253 F. Supp. 2d 361 (NDNY 2003).
While the suit against the Government was still pending, Susan Hallock filed this action against the individual agents under Bivens v. Six Unknown Fed. Narcotics Agents, 403 U. S. 388 (1971), alleging in her complaint that the agents had damaged her computers and thus deprived her of property including business income in violation of the Due Process Clause of the Fifth Amendment. After the District Court dismissed the first suit against the Government, the agents moved for judgment in the Bivens action, citing the judgment bar of the Tort Claims Act, that “the judgment in an action under [§] 1346(b) of this title shall constitute a complete bar to any action by the claimant, by reason of the same subject matter, against the employee of the government whose act or omission gave rise to the claim.” § 2676.
The District Court denied the motion, holding that dismissal of the action against the. Government under the Tort Claims Act was solely on a procedural ground, and thus failed to raise the judgment bar. Hallock v. Bonner, 281 F. Supp. 2d 425, 427 (NDNY 2008). The Court of Appeals for the Second Circuit affirmed, after first finding jurisdiction under the collateral order doctrine. Hallock v. Bonner, 387 F. 3d 147 (2004). We granted certiorari to consider the judgment bar, 545 U. S. 1103 (2005), but now vacate for want of appellate jurisdiction on the part of the Court of Appeals.
II
The collateral order doctrine, identified with Cohen v. Beneficial Industrial Loan Corp., 337 U. S. 541 (1949), is “best understood not as an exception to the ‘final decision’ rule laid down by Congress in § 1291, but as a ‘practical construction’ of it.” Digital Equipment, supra, at 867 (quoting Cohen, supra, at 546). Whereas 28 U. S. C. § 1291 “gives courts of appeals jurisdiction over ‘all final decisions’ of district courts” that are not directly appealable to us, Behrens v. Pelletier, 516 U. S. 299, 305 (1996), the collateral order doctrine accommodates a “small class” of rulings, not concluding the litigation, but conclusively resolving “claims of right separable from, and collateral to, rights asserted in the action,” ibid, (internal quotation marks omitted). The claims are “too important to be denied review and too independent of the cause itself to require that appellate consideration be deferred until the whole case is adjudicated.” Cohen, supra, at 546.
The requirements for collateral order appeal have been distilled down to three conditions: that an order “ ‘[1] conclusively determine the disputed question, [2] resolve an important issue completely separate from the merits of the action, and [3] be effectively unreviewable on appeal from a final judgment.’ ” Puerto Rico Aqueduct and Sewer Authority v. Metcalf & Eddy, Inc., 506 U. S. 139, 144 (1993) (quoting Coopers & Lybrand v. Livesay, 437 U. S. 463, 468 (1978)). The conditions are “stringent,” Digital Equipment, supra, at 868 (citing Midland Asphalt Corp. v. United States, 489 U. S. 794, 799 (1989)), and unless they are kept so, the underlying doctrine will overpower the substantial finality interests § 1291 is meant to further: judicial efficiency, for example, and the “sensible policy ‘of avoiding] the obstruction to just claims that would come from permitting the harassment and cost of a succession of separate appeals from the various rulings to which a litigation may give rise.’” Firestone Tire & Rubber Co. v. Risjord, 449 U. S. 368, 374 (1981) (quoting Cobbledick v. United States, 309 U. S. 323, 325 (1940)).
Accordingly, we have not mentioned applying the collateral order doctrine recently without emphasizing its modest scope. See, e. g., Digital Equipment, 511 U. S., at 868 (“[T]he ‘narrow’ exception should stay that way and never be allowed to swallow the general rule that a party is entitled to a single appeal, to be deferred until final judgment has been entered ...” (citation omitted)). And we have meant what we have said; although the Court has been asked many times to expand the “small class” of collaterally appeal-able orders, we have instead kept it narrow and selective in its membership.
A
Prior cases mark the line between rulings within the class and those outside. On the immediately appealable side are orders rejecting absolute immunity, Nixon v. Fitzgerald, 457 U. S. 731, 742 (1982), and qualified immunity, Mitchell v. Forsyth, 472 U. S. 511, 530 (1985). A State has the benefit of the doctrine to appeal a decision denying its claim to Eleventh Amendment immunity, Puerto Rico Aqueduct, supra, at 144-145, and a criminal defendant may collaterally appeal an adverse ruling on a defense of double jeopardy, Abney v. United States, 431 U. S. 651, 660 (1977).
The examples admittedly raise the lawyer’s temptation to generalize. In each case, the collaterally appealing party was vindicating or claiming a right to avoid trial, in satisfaction of the third condition: unless the order to stand trial was immediately appealable, the right would be effectively lost. Those seeking immediate appeal therefore naturally argue that any order denying a claim of right to prevail without trial satisfies the third condition. But this generalization is too easy to be sound and, if accepted, would leave , the final order requirement of § 1291 in tatters. We faced this prospect in Digital Equipment, supra, an appeal from an order rescinding a settlement agreement: Petitioner asserted a “ ‘right not to stand trial’ requiring protection by way of immediate appeal,” analogizing the rescission to a denial of immunity. Id., at 869. We said no, however, lest “every right that could be enforced appropriately by pretrial dismissal [be] loosely ... described as conferring a ‘right not to stand trial.’” Id., at 873. Otherwise, “almost every pretrial or trial order might be called ‘effectively unreviewable’ in the sense that relief from error can never extend to rewriting history.” Id., at 872.
“Allowing immediate appeals to vindicate every such right would move § 1291 aside for claims that the district court lacks personal jurisdiction, that the statute of limitations has run, that the movant has been denied his Sixth Amendment right to a speedy trial, that an action is barred on claim preclusion principles, that no material fact is in dispute and the moving party is entitled to judgment as a matter of law, or merely that the com: plaint fails to state a claim. Such motions can be made in virtually every case.” Id., at 873 (citations omitted).
B
Since only some orders denying an asserted right to avoid the burdens of trial qualify, then, as orders that cannot be reviewed “effectively” after a conventional final judgment, the cases have to be combed for some further characteristic that merits appealability under Cohen; and as Digital Equipment explained, that something further boils down to “a judgment about the value of the interests that would be lost through rigorous application of. a final judgment requirement.” 511 U. S., at 878-879 (citing Van Cauwenberghe v. Biard, 486 U. S. 517, 524 (1988)). See also Lauro Lines s.r.l. v. Chasser, 490 U. S. 495, 502 (1989) (SCALIA, J., concurring) (“The importance of the right asserted has always been a significant part of our collateral order doctrine”).
Thus, in Nixon, supra, we stressed the “compelling public ends,” id., at 758, “rooted in . . . the separation of powers,” id., at 749, that would be compromised by failing to allow immediate appeal of a denial of absolute Presidential immunity, id., at 743, 752, n. 32. In explaining collateral order treatment when a qualified immunity claim was at issue in Mitchell, supra, we spoke of the threatened disruption of governmental functions, and fear of inhibiting able people from exercising discretion in public service if a full trial were threatened whenever they acted reasonably in the face of law that is not “clearly established.” Id., at 526. Puerto Rico Aqueduct, 506 U. S. 139, explained the immediate ap-pealability of an order denying a claim of Eleventh Amendment immunity by adverting not only to the burdens of litigation but to the need to ensure vindication of a State’s dignitary interests. Id., at 146. And although the double jeopardy claim given Cohen treatment in Abney, supra, did not implicate a right to be free of all proceedings whatsoever (since prior jeopardy is essential to the defense), we described the enormous prosecutorial power of the Government to subject an individual “to embarrassment, expense and ordeal . . . compelling him to live in a continuing state of anxiety,” id., at 661-662 (internal quotation marks omitted); the only way to alleviate these consequences of the Government’s superior position was by collateral order appeal.
In each case, some particular value of a high order was marshaled in support of the interest in avoiding trial: honoring the separation of powers, preserving the efficiency of government and the initiative of its officials, respecting a State’s dignitary interests, and mitigating the government’s advantage over the individual. That is, it is not mere avoidance of a trial, but avoidance of a trial that would imperil a substantial public interest, that counts when asking whether an order is “effectively” unreviewable if review is to be left until later. Coopers & Lybrand, 437 U. S., at 468 (internal quotation marks omitted).
C
Does the claim of the customs agents in this case serve such a weighty public objective that the judgment bar should be treated as an immunity demanding the protection of a collateral order appeal? One can argue, of course, that if the Bivens action goes to trial the efficiency of Government will be compromised and the officials burdened and distracted, as in the qualified immunity case: if qualified immunity gets Cohen treatment, so should the judgment bar to further litigation in the aftermath of the Government’s success under the Tort Claims Act. But the cases are different. Qualified immunity is not the law simply to save trouble for the Government and its employees; it is recognized because the burden of trial is unjustified in the face of a colorable claim that the law on point was not clear when the official took action, and the action was reasonable in light of the law as it was. The nub of qualified immunity is the need to induce officials to show reasonable initiative when the relevant law is not “clearly established,” Harlow v. Fitzgerald, 457 U. S. 800, 818 (1982); ef. Saucier v. Katz, 533 U. S. 194, 202 (2001); a quick resolution of a qualified immunity claim is essential.
There is, however, no such public interest at stake simply because the judgment bar is said to be applicable. It is not the preservation of initiative but the avoidance of litigation for its own sake .that supports the judgment bar, and if simply abbreviating litigation troublesome to Government employees were important enough for Cohen treatment, collateral order appeal would be a matter of right whenever the Government lost a motion to dismiss under the Tort Claims Act, or a federal officer lost one on a Bivens action, or a state official was in that position in a case under 42 U. S. C. §1983, or Ex parte Young, 209 U. S. 123 (1908). In effect, 28 U. S. C. § 1291 would fade out whenever the Government or an official lost an early round that could have ended the fight.
Another difference between qualified immunity and the judgment bar lies in the bar’s essential procedural element. While a qualified immunity claim is timely from the moment an official is served with a complaint, the judgment bar can be raised only after a case under the Tort Claims Act has been resolved in the Government’s favor. If a Bivens action alone is brought, there will be no possibility of a judgment bar, nor will there be so long as a Bivens action against officials and a Tort Claims Act against the Government are pending simultaneously (as they were for a time here). In the present case, if Susan Hallock had brought her Bivens action and no other, the agents could not possibly have invoked the judgment bar in claiming a right to be free of trial. The closer analogy to the judgment bar, then, is not immunity but the defense of claim preclusion, or res judicata.
Although the statutory judgment bar is arguably broader than traditional res judicata, it functions in much the same way, with both rules depending on a prior judgment as a condition precedent and neither reflecting a. policy that a defendant should be scot free of any liability. The concern behind both rules is a different one, of avoiding duplicative litigation, “multiple suits on identical entitlements or obligations between the same parties.” 18 C. Wright, A. Miller, & E. Cooper, Federal Practice and Procedure § 4402, p. 9 (2d ed. 2002) (internal quotation marks omitted). But this rule of respecting a prior judgment by giving a defense against relitigation has not been thought to protect values so great that only immediate appeal can effectively vindicate them. As we indicated in Digital Equipment, in the usual case, absent particular reasons for discretionary appeal by leave of the trial court, a defense of claim preclusion is fairly subordinated to the general policy of deferring appellate review to the moment of final judgment. 511 U. S., at 873.
The judgment bar at issue in this case has no claim to greater importance than the typical defense of claim preclusion; and we hold true to form in deciding what Digital Equipment implied, that an order rejecting the defense of judgment bar under 28 U. S. C. § 2676 cries for no immediate appeal of right as a collateral order.
We vacate the judgment of the Court of Appeals and remand the case with instructions to dismiss the appeal for lack of jurisdiction.
It is so ordered.
The right to be free of double jeopardy is subject to an analogous condition, that jeopardy have attached in a prior proceeding, Monge v. California, 524 U. S. 721, 728 (1998), a characteristic that distinguishes the Fifth Amendment right from other immunities mentioned above. But, as we explained, double jeopardy deserves immunity treatment under §1291 owing to the enormous advantage of a Government prosecutor who chooses to go repeatedly against an individual.