delivered the opinion of the Court.

This is the attorney’s fee aftermath of major school desegregation litigation in Kansas City, Missouri. We granted certiorari, 488 U. S. 888 (1988), to resolve two questions relating to fees litigation under 90 Stat. 2641, as amended, 42 U. S. C. § 1988. First, does the Eleventh Amendment prohibit enhancement of a fee award against a State to compensate for delay in payment? Second, should the fee award compensate the work of paralegals and law clerks by applying the market rate for their work?

[*276] I

This litigation began in 1977 as a suit by the Kansas City Missouri School District (KCMSD), the school board, and the children of two school board members, against the State of Missouri and other defendants. The plaintiffs alleged that the State, surrounding school districts, and various federal agencies had caused and perpetuated a system of racial segregation in the schools of the Kansas City metropolitan area. They sought various desegregation remedies. KCMSD was subsequently realigned as a nominal defendant, and a class of present and future KCMSD students was certified as plaintiffs. After lengthy proceedings, including a trial that lasted 754 months during 1983 and 1984, the District Court found the State of Missouri and KCMSD liable, while dismissing the suburban school districts and the federal defendants. It ordered various intradistrict remedies, to be paid for by the State and KCMSD, including $260 million in capital improvements and a magnet-school plan costing over $200 million. See Jenkins v. Missouri, 807 F. 2d 657 (CA8 1986) (en banc), cert. denied, 484 U. S. 816 (1987); Jenkins v. Missouri, 855 F. 2d 1295 (CA8 1988), cert. granted, 490 U. S. 1034 (1989).

The plaintiff class has been represented, since 1979, by Kansas City lawyer Arthur Benson and, since 1982, by the NAACP Legal Defense and Educational Fund, Inc. (LDF). Benson and the LDF requested attorney’s fees under the Civil Rights Attorney’s Fees Awards Act of 1976, 42 U. S. C. § 1988.^[1] Benson and his associates had devoted 10,875 attorney hours to the litigation, as well as 8,108 hours of paralegal and law clerk time. For the LDF the corresponding[*277] figures were 10,854 hours for attorneys and 15,517 hours for paralegals and law clerks. Their fee applications deleted from these totals 3,628 attorney hours and 7,046 paralegal hours allocable to unsuccessful claims against the suburban school districts. With additions for postjudgment monitoring and for preparation of the fee application, the District Court awarded Benson a total of approximately $1.7 million and the LDF $2.3 million. App. to Pet. for Cert. A22-A43.

In calculating the hourly rate for Benson’s fees the court noted that the market rate in Kansas City for attorneys of Benson’s qualifications was in the range of $125 to $175 per hour, and found that “Mr. Benson’s rate would fall at the higher end of this range based upon his expertise in the area of civil rights.” Id., at A26. It calculated his fees on the basis of an even higher hourly rate of $200, however, because of three additional factors: the preclusion of other employment, the undesirability of the case, and the delay in payment for Benson’s services. Id., at A26-A27. The court also took account of the delay in payment in setting the rates for several of Benson’s associates by using current market rates rather than those applicable at the time the services were rendered. Id., at A28-A30. For the same reason, it calculated the fees for the LDF attorneys at current market rates. Id., at A33.

Both Benson and the LDF employed numerous paralegals, law clerks (generally law students working part time), and recent law graduates in this litigation. The court awarded fees for their work based on Kansas City market rates for those categories. As in the case of the attorneys, it used current rather than historic market rates in order to compensate for the delay in payment. It therefore awarded fees based on hourly rates of $35 for law clerks, $40 for paralegals, and $50 for recent law graduates. Id., at A29-A31, A34. The Court of Appeals affirmed in all respects. 838 F. 2d 260 (CA8 1988).

[*278] II

Our grant of certiorari extends to two issues raised by the State of Missouri. Missouri first contends that a State cannot, consistent with the principle of sovereign immunity this Court has found embodied in the Eleventh Amendment, be compelled to pay an attorney’s fee enhanced to compensate for delay in payment. This question requires us to examine the intersection of two of our precedents, Hutto v. Finney, 437 U. S. 678 (1978), and Library of Congress v. Shaw, 478 U. S. 310 (1986).^[2]

In Hutto v. Finney, the lower courts had awarded attorney’s fees against the State of Arkansas, in part pursuant to §1988, in connection with litigation over the conditions of confinement in that State’s prisons. The State contended that any such award was subject to the Eleventh Amendment’s constraints on actions for damages payable from a State’s treasury. We relied, in rejecting that contention, on the distinction drawn in our earlier cases between “retroactive monetary relief” and “prospective injunctive relief.” See Edelman v. Jordan, 415 U. S. 651 (1974); Ex parte Young, 209 U. S. 123 (1908). Attorney’s fees, we held, belonged to the latter category, because they constituted reimbursement of “expenses incurred in litigation seeking only prospective relief,” rather than “retroactive liability for prelitigation conduct.” Hutto, 437 U. S., at 695; see also id.,. at 690. We explained: “Unlike ordinary ‘retroactive’ relief such as damages or restitution, an award of costs does not compensate the plaintiff for the injury that first brought him into court. Instead, the award reimburses him for a portion of the expenses he incurred in seeking prospective relief.” Id., at 695, n. 24. Section 1988, we noted, fit easily into the[*279] longstanding practice of awarding “costs” against States, for the statute imposed the award of attorney’s fees “as part of the costs.” Id., at 695-696, citing Fairmont Creamery Co. v. Minnesota, 275 U. S. 70 (1927).

After Hutto, therefore, it must be accepted as settled that an award of attorney’s fees ancillary to prospective relief is not subject to the strictures of the Eleventh Amendment. And if the principle of making such an award is beyond the reach of the Eleventh Amendment, the same must also be true for the question of how a “reasonable attorney’s fee” is to be calculated. See Hutto, supra, at 696-697.

Missouri contends, however, that the principle enunciated in Hutto has been undermined by subsequent decisions of this Court that require Congress to “express its intention to abrogate the Eleventh Amendment in unmistakable language in the statute itself.” Atascadero State Hospital v. Scanlon, 473 U. S. 234, 243 (1985); Welch v. Texas Dept, of Highways and Public Transportation, 483 U. S. 468 (1987). See also Dellmuth v. Muth, ante, p. 223; Pennsylvania v. Union Gas Co., ante, p. 1. The flaw in this argument lies in its misreading of the holding of Hutto. It is true that in Hutto we noted that Congress could, in the exercise of its enforcement power under § 5 of the Fourteenth Amendment, set aside the States’ immunity from retroactive damages, 437 U. S., at 693, citing Fitzpatrick v. Bitzer, 427 U. S. 445 (1976), and that Congress intended to do so in enacting § 1988, 437 U. S., at 693-694. But we also made clear that the application of § 1988 to the States did not depend on congressional abrogation of the States’ immunity. We did so in rejecting precisely the “clear statement” argument that Missouri now suggests has undermined Hutto. Arkansas had argued that § 1988 did not plainly abrogate the States’ immunity; citing Employees v. Missouri Dept, of Public Health and Welfare, 411 U. S. 279 (1973), and Edelman v. Jordan, supra, the State contended that “retroactive liability” could not be imposed on the States “in the absence of an extraordinarily ex[*280]plicit statutory mandate.” Hutto, 437 U. S., at 695. We responded as follows: “[Tjhese cases [Employees and Edelman] concern retroactive liability for prelitigation conduct rather than expenses incurred in litigation seeking only prospective relief. The Act imposes attorney’s fees ‘as part of the costs.’ Costs have traditionally been awarded without regard for the States’ Eleventh Amendment immunity.” Ibid.

The holding of Hutto, therefore, was not just that Congress had spoken sufficiently clearly to overcome Eleventh Amendment immunity in enacting § 1988, but rather that the Eleventh Amendment did not apply to an award of attorney’s fees ancillary to a grant of prospective relief. See Maine v. Thiboutot, 448 U. S. 1, 9, n. 7 (1980). That holding is unaffected by our subsequent jurisprudence concerning the degree of clarity with which Congress must speak in order to override Eleventh Amendment immunity, and we reaffirm it today.

Missouri’s other line of argument is based on our decision in Library of Congress v. Shaw, supra. Shaw involved an application of the longstanding “no-interest rule,” under which interest cannot be awarded against the United States unless it has expressly waived its sovereign immunity. We held that while Congress, in making the Federal Government a potential defendant under Title VII of the Civil Rights Act of 1964, had waived the United States’ immunity from suit and from costs including reasonable attorney’s fees, it had not waived the Federal Government’s traditional immunity from any award of interest. We thus held impermissible a 30 percent increase in the “lodestar” fee to compensate for delay in payment. Because we refused to find in the language of Title VII a waiver of the United States’ immunity from interest, Missouri argues, we should likewise conclude that § 1988 is not sufficiently explicit to constitute an abrogation of the States’ immunity under the Eleventh Amendment in regard to any award of interest.

[*281] The answer to this contention is already clear from what we have said about Hutto v. Finney. Since, as we held in Hutto, the Eleventh Amendment does not bar an award of attorney’s fees ancillary to a grant of prospective relief, our holding in Shaw has no application, even by analogy.^[3] There is no need in this case to determine whether Congress has spoken sufficiently clearly to meet a “clear statement” requirement, and it is therefore irrelevant whether the Eleventh Amendment standard should be, as Missouri contends, as stringent as the one we applied for purposes of the no-interest rule in Shaw. Rather, the issue here — whether the “reasonable attorney’s fee” provided for in § 1988 should be calculated in such a manner as to include an enhancement, where appropriate, for delay in payment — is a straightfor[*282]ward matter of statutory interpretation. For this question, it is of no relevance whether the party against which fees are awarded is a State. The question is what Congress intended — not whether it manifested “the clear affirmative intent ... to waive the sovereign’s immunity.” Shaw, 478 U. S., at 321.^[4]

This question is not a difficult one. We have previously explained, albeit in dicta, why an enhancement for delay in payment is, where appropriate, part of a “reasonable attorney’s fee.” In Pennsylvania v. Delaware Valley Citizens’ Council, 483 U. S. 711 (1987), we rejected an argument that a prevailing party was entitled to a fee augmentation to compensate for the risk of nonpayment. But we took care to distinguish that risk from the factor of delay:

“First is the matter of delay. When plaintiffs’ entitlement to attorney’s fees depends on success, their lawyers are not paid until a favorable decision finally eventuates, which may be years later .... Meanwhile, their expenses of doing business continue and must be met. In setting fees for prevailing counsel, the courts have regularly recognized the delay factor, either by basing the award on current rates or by adjusting the fee based on historical rates to reflect its present value. See, e. g., Sierra Club v. EPA, 248 U. S. App. D. C. 107, 120-121, 769 F. 2d 796, 809-810 (1986); Louisville Black Police Officers Organization, Inc. v. Louisville, 700 F. 2d 268, 276, 281 (CA6 1983). Although delay and the risk of nonpayment are often mentioned in the same breath, adjusting for the former is a distinct issue .... We do not suggest . . . that adjustments for delay are[*283] inconsistent with the typical fee-shifting statute.” Id., at 716.

The same conclusion is appropriate under § 1988.^[5] Our cases have repeatedly stressed that attorney’s fees awarded under this statute are to be based on market rates for the services rendered. See, e. g., Blanchard v. Bergeron, 489 U. S. 87 (1989); Riverside v. Rivera, 477 U. S. 561 (1986); Blum v. Stenson, 465 U. S. 886 (1984). Clearly, compensation received several years after the services were rendered — -as it frequently is in complex civil rights litigation — is not equivalent to the same dollar amount received reasonably promptly as the legal services are performed, as would normally be the case with private billings.^[6] We agree, there[*284]fore, that an appropriate adjustment for delay in payment— whether by the application of current rather than historic hourly rates or otherwise—is within the contemplation of the statute.

To summarize: We reaffirm our holding in Hutto v. Finney that the Eleventh Amendment has no application to an award of attorney’s fees, ancillary to a grant of prospective relief, against a State. It follows that the same is true for the calculation of the amount of the fee. An adjustment for delay in payment is, we hold, an appropriate factor in the determination of what constitutes a reasonable attorney’s fee under § 1988. An award against a State of a fee that includes such an enhancement for delay is not, therefore, barred by the Eleventh Amendment.

Ill

Missouri’s second contention is that the District Court erred in compensating the work of law clerks and paralegals (hereinafter collectively “paralegals”) at the market rates for their services, rather than at their cost to the attorney. While Missouri agrees that compensation for the cost of these personnel should be included in the fee award, it suggests that an hourly rate of $15—which it argued below corresponded to their salaries, benefits, and overhead—would be appropriate, rather than the market rates of $35 to $50. According to Missouri, § 1988 does not authorize billing paralegals’ hours at market rates, and doing so produces a “windfall” for the attorney.^[7]

[*285] We begin with the statutory language, which provides simply for “a reasonable attorney’s fee as part of the costs.” 42 U. S. C. § 1988. Clearly, a “reasonable attorney’s fee” cannot have been meant to compensate only work performed personally by members of the bar. Rather, the term must refer to a reasonable fee for the work product of an attorney. Thus, the fee must take into account the work not only of attorneys, but also of secretaries, messengers, librarians, janitors, and others whose labor contributes to the work product for which an attorney bills her client; and it must also take account of other expenses and profit. The parties have suggested no reason why the work of paralegals should not be similarly compensated, nor can we think of any. We thus take as our starting point the self-evident proposition that the “reasonable attorney’s fee” provided for by statute should compensate the work of paralegals, as well as that of attorneys. The more difficult question is how the work of paralegals is to be valuated in calculating the overall attorney’s fee.

The statute specifies a “reasonable” fee for the attorney’s work product. In determining how other elements of the attorney’s fee are to be calculated, we have consistently looked to the marketplace as our guide to what is “reasonable.” In Blum v. Stenson, 465 U. S. 886 (1984), for example, we rejected an argument that attorney’s fees for nonprofit legal[*286] service organizations should be based on cost. We said: “The statute and legislative history establish that ‘reasonable fees’ under § 1988 are to be calculated according to the prevailing market rates in the relevant community . . . Id., at 895. See also, e. g., Delaware Valley, 483 U. S., at 732 (O’Connor, J., concurring) (controlling question concerning contingency enhancements is “how the market in a community compensates for contingency”); Rivera, 477 U. S., at 591 (Rehnquist, J., dissenting) (reasonableness of fee must be determined “in light of both the traditional billing practices in the profession, and the fundamental principle that the award of a ‘reasonable’ attorney’s fee under § 1988 means a fee that would have been deemed reasonable if billed to affluent plaintiffs by their own attorneys”). A reasonable attorney’s fee under § 1988 is one calculated on the basis of rates and practices prevailing in the relevant market, i. e., “in line with those [rates] prevailing in the community for similar services by lawyers of reasonably comparable skill, experience, and reputation,” Blum, supra, at 896, n. 11, and one that grants the successful civil rights plaintiff a “fully compensatory fee,” Hensley v. Eckerhart, 461 U. S. 424, 435 (1983), comparable to what “is traditional with attorneys compensated by a fee-paying client.” S. Rep. No. 94-1011, p. 6 (1976).

If an attorney’s fee awarded under § 1988 is to yield the same level of compensation that would be available from the market, the “increasingly widespread custom of separately billing for the services of paralegals and law students who serve as clerks,” Ramos v. Lamm, 713 F. 2d 546, 558 (CA10 1983), must be taken into account. All else being equal, the hourly fee charged by an attorney whose rates include paralegal work in her hourly fee, or who bills separately for the work of paralegals at cost, will be higher than the hourly fee charged by an attorney competing in the same market who bills separately for the work of paralegals at “market rates.” In other words, the prevailing “market rate” for attorney time is not independent of the manner in which paralegal[*287] time is accounted for.^[8] Thus, if the prevailing practice in a given community were to bill paralegal time separately at market rates, fees awarded the attorney at market rates for attorney time would not be fully compensatory if the court refused to compensate hours billed by paralegals or did so only at “cost.” Similarly, the fee awarded would be too high if the court accepted separate billing for paralegal hours in a market where that was not the custom.

We reject the argument that compensation for paralegals at rates above “cost” would yield a “windfall” for the prevailing attorney. Neither petitioners nor anyone else, to our knowledge, has ever suggested that the hourly rate applied to the work of an associate attorney in a law firm creates a windfall for the firm’s partners or is otherwise improper under § 1988, merely because it exceeds the cost of the attorney’s services. If the fees are consistent with market rates and practices, the “windfall” argument has no more force with regard to paralegals than it does for associates. And it would hardly accord with Congress’ intent to provide a “fully compensatory fee” if the prevailing plaintiff’s attorney in a civil rights lawsuit were not permitted to bill separately for paralegals, while the defense attorney in the same litigation was able to take advantage of the prevailing practice and obtain market rates for such work. Yet that is precisely the result sought in this case by the State of Missouri, which appears to have paid its own outside counsel for the work of paralegals at the hourly rate of $35. Record 2696, 2699.^[9]

[*288] Nothing in § 1988 requires that the work of paralegals invariably be billed separately. If it is the practice in the relevant market not to do so, or to bill the work of paralegals only at cost, that is all that § 1988 requires. Where, however, the prevailing practice is to bill paralegal work at market rates, treating civil rights lawyers’ fee requests in the same way is not only permitted by § 1988, but also makes economic sense. By encouraging the use of lower cost paralegals rather than attorneys wherever possible, permitting market-rate billing of paralegal hours “encourages cost-effective delivery of legal services and, by reducing the spiraling cost of civil rights litigation, furthers the policies underlying civil rights statutes.” Cameo Convalescent Center, Inc. v. Senn, 738 F. 2d 836, 846 (CA7 1984), cert. denied, 469 U. S. 1106 (1985).^[10]

[*289] Such separate billing appears to be the practice in most communities today.^[11] In the present case, Missouri concedes that “the local market typically bills separately for paralegal services,” Tr. of Oral Arg. 14, and the District Court found that the requested hourly rates of $35 for law clerks, $40 for paralegals, and $50 for recent law graduates were the prevailing rates for such services in the Kansas City area. App. to Pet. for Cert. A29, A31, A34. Under these circumstances, the court’s decision to award separate compensation at these rates was fully in accord- with § 1988.

I — I

The courts below correctly granted a fee enhancement to compensate for delay in payment and approved compensation of paralegals and law clerks at market rates. The judgment of the Court of Appeals is therefore

Affirmed.