KAREN LECRAFT HENDERSON, Circuit Judge:

After Wilma Eley prevailed in her lawsuit against the District of Columbia (District) alleging a violation of the Individuals with Disabilities Education Act (IDEA), 20 U.S.C. §§ 1400 et seq., the district court awarded her $62,225 in attorneys' fees and costs for approximately one hundred hours of work. Although the District lodged a variety of challenges to the award in the district court, its sole objection on appeal is to the prevailing market rate that court used in its calculation. Specifically, the District argues that the district court abused its discretion when it adopted Eley's proposed fee matrix, setting the prevailing market rate for her lawyer's services well beyond the next highest hourly rate used by district courts in IDEA litigation. For the reasons set forth below, we vacate the district court's fee award and remand.

I. BACKGROUND

The IDEA requires the District to provide disabled children with a "free appropriate public education." 20 U.S.C. § 1400(d)(1)(A); see also id. § 1412(a)(1) (free appropriate public education "available to all children with disabilities ... between the ages of 3 and 21, inclusive"). If the District fails to do so, the child's parents can file an administrative complaint with the District Office of the State Superintendent of Education (Superintendent's Office). Id. § 1415(b)(6).1 And if the administrative-complaint route fails, the parents can sue the District in district court. See id. § 1415(i)(2)-(3).

If the parents' lawsuit succeeds, the court, "in its discretion, may award reasonable attorneys' fees." Id. § 1415(i)(3)(B)(i)(I). An IDEA fee award "shall be based on rates prevailing in the community in which the action or proceeding arose for the kind and quality of services furnished." Id. § 1415(i)(3)(C) (emphases added). Thus, if the court finds that "the amount of the attorneys' fees otherwise authorized to be awarded unreasonably exceeds the hourly rate prevailing in the community for similar services by attorneys of reasonably comparable skill, reputation, and experience," it "shall reduce... the amount of the attorneys' fees awarded." Id. § 1415(i)(3)(F)(ii) (emphasis added).

The IDEA provides no further guidance for determining an appropriate fee award. In Blum v. Stenson, 465 U.S. 886, 895 n. 11, 104 S.Ct. 1541, 79 L.Ed.2d 891 (1984), however, the United States Supreme Court laid the foundation for the three-part analysis that this Court has since developed. First, the court must determine the "number of hours reasonably expended in litigation." Save Our Cumberland Mountains, Inc. v. Hodel (SOCM), 857 F.2d 1516, 1517 (D.C.Cir. 1988) (en banc).2 Second, it must set the "reasonable hourly rate." Id. Finally, it must determine whether use of a multiplier is warranted. Id. The "fee applicant bears the burden of establishing entitlement to an award, documenting the appropriate hours, and justifying the reasonableness of the rates" and the opposing party remains "free to rebut a fee claim." Covington v. Dist. of Columbia, 57 F.3d 1101, 1107-08 (D.C.Cir.1995).

Here, the District no longer challenges the hours Eley's lawyer spent litigating her IDEA case, and the IDEA prohibits application of any "bonus or multiplier," 20 U.S.C. § 1415(i)(3)(C). Accordingly, we move to the second prong of the SOCM analysis — the reasonable hourly rate. Whether an hourly rate is reasonable turns on three sub-elements: (1) "the attorney[`s] billing practices," (2) "the attorney[`s] skill, experience, and reputation" and (3) "the prevailing market rates in the relevant community." Covington, 57 F.3d at 1107. Of these three sub-elements, the District contests only the prevailing market rate in the relevant community.

Determining the prevailing market rate is "inherently difficult." Blum, 465 U.S. at 895 n. 11, 104 S.Ct. 1541. Even so, "[t]he complexity of the market for legal services does not ... reduce the importance of fixing the prevailing hourly rate in each particular case with a fair degree of accuracy." Nat'l Ass'n of Concerned Veterans v. Sec'y of Def., 675 F.2d 1319, 1325 (D.C.Cir.1982). Thus, a fee applicant must "produce satisfactory evidence — in addition to the attorney's own affidavits — that the requested rates are in line with those prevailing in the community for similar services by lawyers of reasonably comparable skill, experience and reputation." Blum, 465 U.S. at 895 n. 11, 104 S.Ct. 1541 (emphasis added); see also Nat'l Ass'n of Concerned Veterans, 675 F.2d at 1325 ("An applicant is required to provide specific evidence of the prevailing community rate for the type of work for which he seeks an award." (emphasis added)).

We allow a fee applicant to submit attorneys' fee matrices as one type of evidence that "provide[s] a useful starting point" in calculating the prevailing market rate. Covington, 57 F.3d at 1109. The most commonly used fee matrix is the "Laffey Matrix" — the schedule of prevailing rates compiled in Laffey v. Northwest Airlines, Inc. (Laffey I), 572 F.Supp. 354, 371 (D.D.C.1983), aff'd in part, rev'd in part on other grounds, Laffey v. Nw. Airlines, Inc. (Laffey II), 746 F.2d 4 (D.C.Cir. 1984), overruled in part on other grounds, SOCM, 857 F.2d 1516. See Covington, 57 F.3d at 1109. Laffey I established (and Laffey II affirmed) the following schedule for lawyers who practice "complex federal litigation":

Laffey I, 572 F.Supp. at 371-72; Laffey II, 746 F.2d at 8 n. 14.

Fee matrices in general are "somewhat crude" and the Laffey Matrix in particular "lumps attorneys with four to seven years of experience in the same category" as well as "attorneys with eleven to nineteen [years]." Covington, 57 F.3d at 1109. For this reason, a fee applicant supplements fee matrices with other evidence such as "surveys to update the[m]; affidavits reciting the precise fees that attorneys with similar qualifications have received from fee-paying clients in comparable cases; and evidence of recent fees awarded by the courts or through settlement to attorneys with comparable qualifications handling similar cases." Id. Additionally, because the original Laffey Matrix is now more than thirty years old, it must be updated to account for inflation. See SOCM, 857 F.2d at 1525. Competing updated Laffey Matrices have developed, two of which are at issue here. Both have their benefits and limitations.

The first Laffey Matrix is maintained and updated by the District United States Attorney's Office (USAO Laffey Matrix). See USAO Laffey Matrix — 2014-2015, available at http://www.justice.gov/sites/default/files/usao-dc/legacy/2014/07/14/Laffey&Muml;atrix_2014-2015.pdf. The USAO Laffey Matrix starts with "[t]he hourly rates approved in Laffey ... for work done principally in 1981-82" as its baseline. Id. ¶ 3. It adjusts these rates to account for inflation by using the Consumer Price Index for All Urban Consumers (CPI-U) of the United States Bureau of Labor Statistics. Id. The CPI-U measures inflation across "100,000 commodities including food, fuel, and housing" for a given geographic area — here, the Washington, D.C. area. Amicus Br. 4. Yet, "[l]ess than 0.325 percent of the data" in the CPI-U "involves legal services." Id. And according to the district court, the CPI-U "shows that the cost of legal services nationally has far outstripped the increase in overall prices." Eley v. Dist. of Columbia (Eley II), 999 F.Supp.2d 137, 153 (D.D.C.2013); see also id. ("The nationwide cost of legal services has jumped ninety-one percent, nearly twice as much as the general CPI"). During Eley's IDEA litigation, the USAO Laffey Matrix suggests that a litigator specializing in complex federal litigation with 11 to 19 years' experience should receive between $420 and $445 per hour.

Because the USAO Laffey Matrix relies on inflation in general rather than legal-services inflation specifically, its critics have advocated, to some degree of success,3 for a competing Laffey Matrix (LSI Laffey Matrix) that uses the Legal Services Index of the Bureau of Labor Statistics to adjust for inflation. Developed by Michael Kavanaugh, an economist from Hawaii, the LSI Laffey Matrix adjusts for the increases in costs for legal services only. It suffers, however, from its own imprecisions. Rather than tracking inflation levels specific to Washington, D.C., the LSI Laffey Matrix tracks the national rate of change in the cost of legal services. During Eley's IDEA litigation, the LSI Laffey Matrix suggests that a litigator specializing in complex federal litigation with 11 to 19 years' experience should receive $625 per hour.4

On September 13, 2010, Eley filed an administrative complaint with the Superintendent's Office, alleging that the District violated the IDEA by failing to place her special-needs child in an appropriate public school. A hearing officer denied her claim but Eley successfully challenged the denial in district court. See Eley v. Dist. of Columbia (Eley I), No. 1:11-cv-309, 2012 WL 3656471, at *1 (D.D.C. Aug. 24, 2012). After concluding that Eley was entitled to reimbursement for the money she spent on her child's education, the district court remanded her case to the Superintendent's Office, which awarded her $2,850.

Eley then filed a motion for attorneys' fees and costs, seeking $62,225 for 97.5 hours of work (approximately one-third of which occurred at the administrative stage) and 3 hours of travel, as well as $350 for filing fees. To arrive at this figure, Eley used the prevailing market rate set forth in the LSI Laffey Matrix, which reflected that her lawyer should receive $625 per hour. To support her use of the LSI Laffey Matrix, Eley submitted a verified statement from her lawyer, averring that:

Verified Statement of Douglas Tyrka ¶¶ 7-9, 15. Eley also submitted her lawyer's verified time sheets and a declaration of Michael Kavanaugh (prepared for a different case), explaining the methodology Kavanaugh used to generate the LSI Laffey Matrix. The District contested Eley's attorneys' fees request, arguing that the district court should award $749.25 only. In so doing, it cited over forty cases in which district courts had awarded attorneys' fees awards in IDEA cases based on prevailing market rates set at (or below) the USAO Laffey Matrix, not one of which exceeded $425 per hour. In contrast, Eley cited only four cases in which district courts had used the LSI Laffey Matrix, none of which involved IDEA litigation.

The district court referred Eley's motion to a magistrate judge, who declined to use the $625 figure from the LSI Laffey Matrix. He reasoned that Eley failed to submit evidence demonstrating entitlement to an "elevated hourly rate." R & R 8-9. Starting instead with the rates in the USAO Laffey Matrix (between $420 and $445 per hour), the magistrate reduced those rates by twenty-five per cent (between $315 to $333.75) in accordance with other IDEA cases. See R & R 9-10 (discussing Rooths v. Dist. of Columbia, 802 F.Supp.2d 56, 62-63 (D.D.C.2011); McClam v. Dist. of Columbia, 808 F.Supp.2d 184, 190 (D.D.C.2011)). Because the Laffey Matrix was created for "complex federal litigation in the District of Columbia" and it contains presumptive maximum rates, id. at 9 (emphasis added), the magistrate found the maximum Laffey rates "not appropriate" for Eley's IDEA litigation, id. at 10. Multiplying the number of hours by his chosen hourly rate, the magistrate recommended that Eley receive $40,620.32 in fees and costs.

Both sides objected to the magistrate's report and recommendation. Eley challenged the magistrate's choice of prevailing market rate, and the District attacked on multiple fronts, urging the district court to reduce the award from $40,620.32 to no more than $2,900.62. The district court largely ruled in favor of Eley. The court first compared the USAO and LSI Laffey Matrices, ultimately deciding to use the LSI Laffey Matrix. Despite the "major criticism" that the LSI Laffey Matrix is "only indicative of `the prevailing market rates for attorneys engaged in complex federal litigation in the "big firm" context,'" Eley II, 999 F.Supp.2d at 154 (quoting Heller v. Dist. of Columbia, 832 F.Supp.2d 32, 45 (D.D.C.2011) (alterations omitted)), the court observed that Blum and SOCM held, respectively, that non-profit lawyers and lawyers who charge reduced rates for certain types of litigation are entitled to receive the same prevailing market rate as private counsel who prevail in "equally complex Federal litigation." Id. at 155 (citing Blum, 465 U.S. at 895, 104 S.Ct. 1541; SOCM, 857 F.2d at 1524). At bottom, the court concluded that Eley's lawyer's verified statement, "as well as [Kavanaugh's] declaration explaining the methodology and rationale for the updated rates," demonstrated that the LSI Laffey Matrix was "an appropriate measure of the prevailing community rates for attorneys in the Washington, D.C. area." Id. at 156.

Next, the district court rejected the District's argument that "IDEA cases do not represent sufficiently complex federal litigation to warrant the presumptive use of the USAO matrix as the prevailing market rate, let alone the LSI-adjusted rates requested by [Eley]." Id. at 157. It did so after concluding that "some version of the Laffey matrix is presumptively reasonable in civil rights litigation," that "a complexity determination is not the dispositive question as to whether such rates apply" and that, in any event, nothing in D.C. Circuit precedent "indicates that IDEA cases, as a subset of civil rights litigation, fail to qualify as `complex' federal litigation." Id. at 159. In ordering the District to pay the full $62,225 requested by Eley, the court noted that the "complexity of [a] case is accounted for by the number of hours expended" and "should not be accounted for by a blunt reduction of rates before applying the rates to the number of hours expended." Id. at 160. The District timely appealed.

II. ANALYSIS

We review the district court's fee award for abuse of discretion, King v. Palmer, 950 F.2d 771, 785 (D.C.Cir.1991) (en banc), and will not upset its hourly rate determination "absent clear misapplication of legal principles, arbitrary fact finding, or unprincipled disregard for the record evidence." Kattan ex rel. Thomas v. Dist. of Columbia, 995 F.2d 274, 278 (D.C.Cir.1993), as amended (June 30, 1993). "This limited standard of review is appropriate in view of the district court's superior understanding of the litigation and the desirability of avoiding frequent appellate review of what essentially are factual matters." Covington, 57 F.3d at 1110 (quotation marks omitted). At the same time, we "examine de novo whether the district court applied the correct legal standard." Conservation Force v. Salazar, 699 F.3d 538, 542 (D.C.Cir.2012).

As noted, Eley had the burden "to produce satisfactory evidence — in addition to [her] attorney's own affidavits — that [her] requested rates are in line with those prevailing in the community for similar services by lawyers of reasonably comparable skill, experience, and reputation." Covington, 57 F.3d at 1109 (quoting Blum, 465 U.S. at 895 n. 11, 104 S.Ct. 1541). In Covington, this Court held that the "plaintiffs clearly met their burden and their requested rates were properly accorded a presumption of reasonableness." Id. at 1110. We so held because the plaintiffs submitted not only "data demonstrating their attorneys' experience in the legal profession and in litigating complex federal court cases, as well as information probative of their attorneys' skill and reputation," they also submitted "a great deal of evidence regarding prevailing market rates for complex federal litigation," including "the Laffey matrix, the U.S. Attorney's Office matrix, affidavits attesting to increases in the market rates since the original Laffey matrix" and, importantly, "memorandum opinions in district court cases which relied on these matrices." Id. In rebuttal, the District failed to cite any relevant cases supporting its requested rates. Id. at 1111. For this reason, this Court rejected the District's argument that "a civil rights and employment discrimination market actually exists independent of attorneys who handle other types of complex federal litigation" and that this market charges rates "lower than the prevailing rates in the broader legal market." Id.

Here, however, the reverse is true. Eley's evidentiary submission consisted of the LSI Laffey Matrix, Kavanaugh's declaration explaining the LSI Laffey Matrix and her lawyer's verified statement averring that he charged his paying clients the rates in the LSI Laffey Matrix. Absent from her submission, however, is evidence that her "requested rates are in line with those prevailing in the community for similar services," i.e., IDEA litigation. Id. at 1109 (emphasis added); see also 20 U.S.C. § 1415(i)(3)(C) (IDEA fee awards "shall be based on rates prevailing in the community... for the kind and quality of services furnished"). Indeed, Eley directed the district court to only four cases that had employed the LSI Laffey Matrix — none of which was an IDEA case. The District, on the other hand, cited more than forty IDEA cases in which IDEA plaintiffs had received attorneys' fees awards based on prevailing hourly rates at least $180 lower than the $625 rate applied by the district court here.5 On this record, Eley has not met her burden of "justifying the reasonableness of the rates." Covington, 57 F.3d at 1107.

We conclude that, in relieving Eley of her burden, the district court abused its discretion. It relied on Blum and SOCM but neither case establishes that the rates charged by lawyers in the largest law firms automatically set the prevailing market rate for IDEA litigation. Instead, Blum and SOCM held only that legal aid lawyers (Blum), lawyers in nonprofit law firms (Blum) and lawyers who charge either reduced rates or on a pro bono basis (SOCM) should receive fees based on the prevailing market rate charged by for-profit lawyers if they are doing the same type of litigation. Implicit in both cases is the assumption that the legal aid and non-profit lawyers are engaged in litigation that is "equally complex" to that of their for-profit counterparts. Blum, 465 U.S. at 893, 104 S.Ct. 1541; see also SOCM, 857 F.2d at 1524. But absent is any record evidence, other than the fee applicant's declaration, demonstrating that IDEA litigation is as complex as the type of litigation that supports the "enhanced" hourly rates in the LSI Laffey Matrix.

Nor is it an answer to rely on the fact that our precedent does not "indicate[] that IDEA cases, as a subset of civil rights litigation, fail to qualify as `complex' federal litigation." Eley II, 999 F.Supp.2d at 159. Indeed, this reasoning flips the burden of persuasion on its head. By concluding that "some version of the Laffey matrix is presumptively reasonable," settling on the LSI Laffey Matrix and applying it because no evidence was produced disproving that IDEA litigation is sufficiently "complex," id., the district court erred in not requiring Eley to demonstrate that her suggested rate was "in line with those prevailing in the community for similar services." Covington, 57 F.3d at 1109 (quoting Blum, 465 U.S. at 895, 104 S.Ct. 1541 n.11). We do not decide today whether IDEA litigation is in fact sufficiently "complex" to use either version of the Laffey Matrix (and if so, which version of the Laffey Matrix is more appropriate).6 But the obligation was Eley's to demonstrate that her suggested rates were appropriate. Because she was not required to do so, the district court, we conclude, "clear[ly] misappli[ed] ... legal principles" and thus abused its discretion. Kattan, 995 F.2d at 278.

For the foregoing reasons, we vacate the district court's fee award and remand for proceedings consistent with this opinion.

So ordered.

KAVANAUGH, Circuit Judge, concurring:

I join the Court's opinion. I would simply add that, in my view, the United States Attorney's Office Laffey matrix is appropriate for IDEA cases.