Justice Powell
delivered the opinion of the Court.
The issue in this case arises from a postjudgment request for an award of attorney’s fees under the Civil Rights Attorney’s Fees Awards Act of 1976, 42 U. S. C. § 1988. The question is whether such a request is a “motion to alter or [447]*447amend the judgment,” subject to the 10-day timeliness standard of Rule 59(e) of the Federal Rules of Civil Procedure.1
W
This litigation began in March 1976, when the petitioner Richard White filed suit against respondent New Hampshire Department of Employment Security (NHDES) and its Commissioner. White claimed that the respondent failed to make timely determinations of certain entitlements to unemployment compensation, thereby violating an applicable provision of the Social Security Act, 42 U. S. C. § 503(a)(1), the Due Process Clause of the Constitution of the United States, and 42 U. S. C. § 1983. Alleging federal jurisdiction under 28 U. S. C. § 1343, he sought declaratory and injunctive relief and “such other and further relief as may be equitable and just.” App. 15. His complaint did not specifically request attorney’s fees.
Following certification of the case as a class action, the District Court granted relief on petitioner’s claim under the Social Security Act.2 Pending an appeal by NHDES to the Court of Appeals, however, the parties signed a settlement agreement. The case was then remanded to the District Court, which approved the consent decree and gave judgment accordingly on January 26, 1979.
Five days after the entry of judgment, counsel to White wrote to respondent’s counsel, suggesting that they meet to discuss the petitioner’s entitlement to attorney’s fees as a prevailing party under 42 U. S. C. § 1988. No meeting appears to have been held. On June 7, 1979, approximately [448]*448four and one-half months after the entry of a final judgment, the petitioner White filed a motion in which an award of fees formally was requested.
In a hearing in the District Court, respondent’s counsel claimed he had been surprised by petitioner’s postjudgment requests for attorney’s fees.3 He averred he understood that the consent decree, by its silence on the matter, implicitly had waived any claim to a fee award. White’s counsel asserted a different understanding. Apparently determining that the settlement agreement had effected no waiver,4 the District Court granted attorney’s fees in the sum of $16,644.40.
Shortly thereafter, respondent moved to vacate the consent decree. It argued, in effect, that it had thought its total liability fixed by the consent decree and that it would not have entered a settlement knowing that further liability might still be established. The District Court denied the motion to vacate.
On appeal, the Court of Appeals for the First Circuit reversed the District Court’s decision to award attorney’s fees under § 1988. 629 F. 2d 697 (1980). The court held that petitioner’s postjudgment motion for attorney’s fees constituted a motion to alter or amend the judgment, governed by Rule 59(e) of the Federal Rules of Civil Procedure and its 10-day time limit. 629 F. 2d, at 699.
In holding as it did, the Court of Appeals recognized that § 1988 provided for the award of attorney’s fees “as part of the costs.”6 But it declined to follow a recent decision of the [449]*449Court of Appeals for the Fifth Circuit6 that treated a § 1988 fee request as a motion for “costs” under Federal Rules of Civil Procedure 54(d)7 and 588 — Rules that contain no explicit time bars. Despite the language of § 1988, the Court of Appeals reasoned that attorney’s fees could not be the kind of “costs” contemplated by Rules 54(d) and 58. It reached this conclusion by looking to 28 U. S. C. § 1920, which specifies various “costs” that can be assessed by a clerk of court under Rule 54. The court found all -to be “capable of routine computation” on a day’s notice. 629 F. 2d, at 702. By contrast, an award of attorney’s fees must be made by a judge. Further, as in this case, a fee award could affect substantially the total liability of the parties.
The Court of Appeals found this case distinguishable from Hutto v. Finney, 437 U. S. 678 (1978), in which this Court characterized attorney’s fees, under the Fees Act, as “costs” taxable against a State. In Hutto, the Court of Appeals reasoned, the narrow question was whether the States have Eleventh Amendment immunity against liability for attorney’s fees. The question was not whether attorney’s fees are costs under Rule 54. The court also dismissed the argument that a request for attorney’s fees is “a collateral and in[450]*450dependent claim” properly adjudicated separately from a claim on the merits.
Because other Courts of Appeals have reached different conclusions about the applicability of Rule 59(e) to post-judgment motions for the award of attorney’s fees,9 we granted certiorari in this case to resolve the conflict.10 We now reverse.
II
A
Rule 59(e) was added to the Federal Rules of Civil Procedure in 1946. Its draftsmen had a clear and narrow aim. According to the accompanying Advisory Committee Report, the Rule was adopted to “mak[e] clear that the district court possesses the power” to rectify its own mistakes in the period immediately following the entry of judgment.11 The question of the court’s authority to do so had arisen in Boaz v. Mutual Life Ins. Co. of New York, 146 F. 2d 321, 322 (CA8 1944). According to their report, the draftsmen intended Rule 59(e) specifically “to care for a situation such as that arising in Boaz.”12
[451]*451B
Consistently with this original understanding, the federal courts generally have invoked Rule 59(e) only to support reconsideration of matters properly encompassed in a decision on the merits. E. g., Browder v. Director, Illinois Dept. of Corrections, 434 U. S. 257 (1978).
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Justice Powell
delivered the opinion of the Court.
The issue in this case arises from a postjudgment request for an award of attorney’s fees under the Civil Rights Attorney’s Fees Awards Act of 1976, 42 U. S. C. § 1988. The question is whether such a request is a “motion to alter or [447]*447amend the judgment,” subject to the 10-day timeliness standard of Rule 59(e) of the Federal Rules of Civil Procedure.1
W
This litigation began in March 1976, when the petitioner Richard White filed suit against respondent New Hampshire Department of Employment Security (NHDES) and its Commissioner. White claimed that the respondent failed to make timely determinations of certain entitlements to unemployment compensation, thereby violating an applicable provision of the Social Security Act, 42 U. S. C. § 503(a)(1), the Due Process Clause of the Constitution of the United States, and 42 U. S. C. § 1983. Alleging federal jurisdiction under 28 U. S. C. § 1343, he sought declaratory and injunctive relief and “such other and further relief as may be equitable and just.” App. 15. His complaint did not specifically request attorney’s fees.
Following certification of the case as a class action, the District Court granted relief on petitioner’s claim under the Social Security Act.2 Pending an appeal by NHDES to the Court of Appeals, however, the parties signed a settlement agreement. The case was then remanded to the District Court, which approved the consent decree and gave judgment accordingly on January 26, 1979.
Five days after the entry of judgment, counsel to White wrote to respondent’s counsel, suggesting that they meet to discuss the petitioner’s entitlement to attorney’s fees as a prevailing party under 42 U. S. C. § 1988. No meeting appears to have been held. On June 7, 1979, approximately [448]*448four and one-half months after the entry of a final judgment, the petitioner White filed a motion in which an award of fees formally was requested.
In a hearing in the District Court, respondent’s counsel claimed he had been surprised by petitioner’s postjudgment requests for attorney’s fees.3 He averred he understood that the consent decree, by its silence on the matter, implicitly had waived any claim to a fee award. White’s counsel asserted a different understanding. Apparently determining that the settlement agreement had effected no waiver,4 the District Court granted attorney’s fees in the sum of $16,644.40.
Shortly thereafter, respondent moved to vacate the consent decree. It argued, in effect, that it had thought its total liability fixed by the consent decree and that it would not have entered a settlement knowing that further liability might still be established. The District Court denied the motion to vacate.
On appeal, the Court of Appeals for the First Circuit reversed the District Court’s decision to award attorney’s fees under § 1988. 629 F. 2d 697 (1980). The court held that petitioner’s postjudgment motion for attorney’s fees constituted a motion to alter or amend the judgment, governed by Rule 59(e) of the Federal Rules of Civil Procedure and its 10-day time limit. 629 F. 2d, at 699.
In holding as it did, the Court of Appeals recognized that § 1988 provided for the award of attorney’s fees “as part of the costs.”6 But it declined to follow a recent decision of the [449]*449Court of Appeals for the Fifth Circuit6 that treated a § 1988 fee request as a motion for “costs” under Federal Rules of Civil Procedure 54(d)7 and 588 — Rules that contain no explicit time bars. Despite the language of § 1988, the Court of Appeals reasoned that attorney’s fees could not be the kind of “costs” contemplated by Rules 54(d) and 58. It reached this conclusion by looking to 28 U. S. C. § 1920, which specifies various “costs” that can be assessed by a clerk of court under Rule 54. The court found all -to be “capable of routine computation” on a day’s notice. 629 F. 2d, at 702. By contrast, an award of attorney’s fees must be made by a judge. Further, as in this case, a fee award could affect substantially the total liability of the parties.
The Court of Appeals found this case distinguishable from Hutto v. Finney, 437 U. S. 678 (1978), in which this Court characterized attorney’s fees, under the Fees Act, as “costs” taxable against a State. In Hutto, the Court of Appeals reasoned, the narrow question was whether the States have Eleventh Amendment immunity against liability for attorney’s fees. The question was not whether attorney’s fees are costs under Rule 54. The court also dismissed the argument that a request for attorney’s fees is “a collateral and in[450]*450dependent claim” properly adjudicated separately from a claim on the merits.
Because other Courts of Appeals have reached different conclusions about the applicability of Rule 59(e) to post-judgment motions for the award of attorney’s fees,9 we granted certiorari in this case to resolve the conflict.10 We now reverse.
II
A
Rule 59(e) was added to the Federal Rules of Civil Procedure in 1946. Its draftsmen had a clear and narrow aim. According to the accompanying Advisory Committee Report, the Rule was adopted to “mak[e] clear that the district court possesses the power” to rectify its own mistakes in the period immediately following the entry of judgment.11 The question of the court’s authority to do so had arisen in Boaz v. Mutual Life Ins. Co. of New York, 146 F. 2d 321, 322 (CA8 1944). According to their report, the draftsmen intended Rule 59(e) specifically “to care for a situation such as that arising in Boaz.”12
[451]*451B
Consistently with this original understanding, the federal courts generally have invoked Rule 59(e) only to support reconsideration of matters properly encompassed in a decision on the merits. E. g., Browder v. Director, Illinois Dept. of Corrections, 434 U. S. 257 (1978). By contrast, a request for attorney’s fees under § 1988 raises legal issues collateral to the main cause of action13 — issues to which Rule 59(e) was never intended to apply.
Section 1988 provides for awards of attorney’s fees only to a “prevailing party.” Regardless of when attorney’s fees are requested, the court’s decision of entitlement to fees will therefore require an inquiry separate from the decision on [452]*452the merits — an inquiry that cannot even commence until one party has “prevailed.” Nor can attorney’s fees fairly be characterized as an element of “relief’ indistinguishable from other elements. Unlike other judicial relief, the attorney’s fees allowed under § 1988 are not compensation for the injury giving rise to an action. Their award is uniquely separable from the cause of action to be proved at trial. See Hutto v. Finney, 437 U. S., at 695, n. 24.
As the Court of Appeals for the Fifth Circuit recently stated:
“[A] motion for attorney’s fees is unlike a motion to alter or amend a judgment. It does not imply a change in the judgment, but merely seeks what is due because of the judgment. It is, therefore, not governed by the provisions of Rule 59(e).” Knighton v. Watkins, 616 F. 2d 795, 797 (1980).14
III
In holding Rule 59(e) applicable to the postjudgment fee request in this case, the Court of Appeals emphasized the need to prevent fragmented appellate review and unfair postjudgment surprise to nonprevailing defendants. See 629 F. 2d, at 701-704. These are important concerns. But we do not think that the application of Rule 59(e) to § 1988 fee requests is either necessary or desirable to promote finality, judicial economy, or fairness.
The application of Rule 59(e) to postjudgment fee requests could yield harsh and unintended consequences. Section [453]*4531988 authorizes the award of attorney’s fees in constitutional and civil rights litigation of various kinds. In civil rights actions, especially in those involving "relief of an injunctive nature that must prove its efficacy only over a period of time,” this Court has recognized that “many final orders may issue in the course of the litigation. ” Bradley v. Richmond School Bd., 416 U. S. 696, 722-723 (1974). Yet sometimes it may be unclear even to counsel which orders are and which are not “final judgments.” If Rule 59(e) were applicable, counsel would forfeit their right to fees if they did not file a request in conjunction with each “final” order. Cautious to protect their own interests, lawyers predictably would respond by entering fee motions in conjunction with nearly every interim ruling. Yet encouragement of this practice would serve no useful purpose. Neither would litigation over the “finality” of various interim orders in connection with which fee requests were not filed within the 10-day period.
The 10-day limit of Rule 59(e) also could deprive counsel of the time necessary to negotiate private settlements of fee questions. If so, the application of Rule 59(e) actually could generate increased litigation of fee questions — a result ironically at odds with the claim that it would promote judicial economy.15
[454]*454B
Section 1988 authorizes the award of attorney’s fees “in [the] discretion” of the court. We believe that this discretion will support a denial of fees in cases in which a postjudgment motion unfairly surprises or prejudices the affected party. Moreover, the district courts remain free to adopt local rules establishing timeliness standards for the filing of claims for attorney’s fees.16 And of course the district courts generally can avoid piecemeal appeals by promptly hearing and deciding claims to attorney’s fees. Such practice normally will permit appeals from fee awards to be considered together with any appeal from a final judgment on the merits.17
[455]*455IV
For the reasons stated in this opinion, the decision of the Court of Appeals is reversed, and the case is remanded for action consistent with this opinion.
So ordered.