Top 100 Contractors in NAICS 54121: Accounting, Tax Preparation, Bookkeeping, and Payroll Services, FY2021

Name: Top 100 Contractors in NAICS 54121: Accounting, Tax Preparation, Bookkeeping, and Payroll Services, FY2021
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2020 – Sep 30, 2021 Code page on GovTribe

The top 10 won 72% of FY2021 NAICS 54121 contract dollars

Contract obligations: $1,727,065,471 Net of deobligations, by contracts coded NAICS 54121 or a code under it
Contractors: 272 Parent companies with an obligation
Largest contractor: Kpmg L.L.P. $365 million, 19.8% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Kpmg L.L.P. 3 awardees Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) Army (Department of the Army)	$364,784,229	19.8%	Rank history: #2 in FY2022, #3 in FY2023, #2 in FY2024 and #2 in FY2025; up 1 since FY2020.
2	Ernst & Young LLP 2 awardees Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$347,649,759	18.9%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; down 1 since FY2020.
3	Deloitte LLP 3 awardees, including Deloitte Consulting LLP and Deloitte & Touche LLP Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DSCA (Defense Security Cooperation Agency)	$246,768,726	13.4%	Rank history: #3 in FY2022, #2 in FY2023, #3 in FY2024 and #3 in FY2025; up 2 since FY2020.
4	Kearney & Company, P.C. Top agencies USAF (Department of the Air Force) HHS (Department of Health and Human Services) DHS (Department of Homeland Security)	$158,051,858	8.6%	Rank history: #4 in FY2022, #4 in FY2023, #6 in FY2024 and not on the FY2025 list; down 1 since FY2020.
5	Avantus Federal LLC Top agencies OSD (Office of the Secretary of Defense) GSA (General Services Administration) WHS (DOD Washington Headquarters Service)	$79,184,387	4.3%	Rank history: #5 in FY2022, #9 in FY2023, #46 in FY2024 and #21 in FY2025; up 2 since FY2020.
6	Haynes, Inc. Top agencies DOS (Department of State)	$32,124,464	1.7%	Rank history: #9 in FY2022 and not on the FY2023–FY2025 lists; up 2 since FY2020.
7	Myers and Stauffer LC Top agencies HHS (Department of Health and Human Services) DOJ (Department of Justice)	$27,660,108	1.5%	Rank history: #20 in FY2022, #19 in FY2023, #61 in FY2024 and #13 in FY2025; up 9 since FY2020.
8	CBE Group Inc. the 2 awardees Top agencies Treasury (Department of the Treasury)	$27,325,619	1.5%	Rank history: #6 in FY2022, #6 in FY2023, #7 in FY2024 and #7 in FY2025; up 11 since FY2020.
9	Verato, Inc. Top agencies DCSA (Defense Counterintelligence and Security Agency) DOJ (Department of Justice) AOUSC (Administrative Office of the U.S. Courts)	$21,790,756	1.2%	Rank history: #14 in FY2022, #13 in FY2023, #40 in FY2024 and #48 in FY2025; up 3 since FY2020.
10	Guidehouse Inc. Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice) OSD (Office of the Secretary of Defense)	$21,256,238	1.2%	Rank history: #10 in FY2022, #5 in FY2023, #5 in FY2024 and #5 in FY2025; up 5 since FY2020.
11	Hamilton Enterprises, LLC Top agencies DHA (Defense Health Agency) Treasury (Department of the Treasury) DHS (Department of Homeland Security)	$16,227,838	0.9%	Rank history: #13 in FY2022, #12 in FY2023, #14 in FY2024 and #9 in FY2025; up 6 since FY2020.
12	Miracle Systems LLC Top agencies DHS (Department of Homeland Security) GSA (General Services Administration)	$14,292,782	0.8%	Rank history: #21 in FY2022 and not on the FY2023–FY2025 lists; up 1 since FY2020.
13	Larsonallen LLP Through Cliftonlarsonallen LLP Top agencies HUD (Department of Housing and Urban Development) HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$14,266,468	0.8%	Rank history: #11 in FY2022 and not on the FY2023–FY2025 lists; up 5 since FY2020.
14	Lynch Consultants, LLC Top agencies DLA (Defense Logistics Agency) HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$13,594,406	0.7%	Rank history: #16 in FY2022, #18 in FY2023, #20 in FY2024 and #26 in FY2025; up 13 since FY2020.
15	Williams, Adley & Company DC LLP Top agencies HUD (Department of Housing and Urban Development) SBA (Small Business Administration) DFAS (Defense Finance and Accounting Service)	$13,476,744	0.7%	Rank history: #23 in FY2022, #17 in FY2023, #11 in FY2024 and #12 in FY2025; up 35 since FY2020.
16	Grant Thornton International Ltd 2 awardees, including Grant Thornton Public Sector LLC Top agencies DHS (Department of Homeland Security) HHS (Department of Health and Human Services)	$12,825,496	0.7%	Rank history: #22 in FY2022, #29 in FY2023 and not on the FY2024–FY2025 lists; up 41 since FY2020.
17	Sehlke Consulting LLC Top agencies Navy (Department of the Navy) USSOCOM (United States Special Operations Command)	$11,880,821	0.6%	Rank history: #12 in FY2022, #14 in FY2023, #18 in FY2024 and not on the FY2025 list; down 3 since FY2020.
18	Conrad LLP Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) USAID (US Agency for International Development)	$11,759,549	0.6%	Rank history: #15 in FY2022, #11 in FY2023, #12 in FY2024 and #11 in FY2025; up 4 since FY2020.
19	Sikich CPA LLC Top agencies USAF (Department of the Air Force) GAO (Government Accountability Office) DOJ (Department of Justice)	$11,446,253	0.6%	Rank history: #19 in FY2022, #20 in FY2023, #15 in FY2024 and #10 in FY2025; up 5 since FY2020.
20	Westat, Inc. Top agencies ED (Department of Education) NSF (National Science Foundation) HHS (Department of Health and Human Services)	$10,446,581	0.6%	Rank history: #27 in FY2022, #35 in FY2023, #17 in FY2024 and #31 in FY2025; up 9 since FY2020.
21	ICF International, Inc. Through ICF Incorporated, L.L.C. Top agencies USAID (US Agency for International Development) EOP (Executive Office of the President) CNCS (Corporation for National and Community Service)	$10,401,863	0.6%	Rank history: #26 in FY2022, #24 in FY2023 and not on the FY2024–FY2025 lists; up 43 since FY2020.
22	State Street Corporation Top agencies PBGC (Pension Benefit Guaranty Corporation)	$9,564,896	0.5%	Rank history: #17 in FY2022, #27 in FY2023, #26 in FY2024 and #22 in FY2025; up 4 since FY2020.
23	Federal Management Systems, Inc. Top agencies DOJ (Department of Justice) HHS (Department of Health and Human Services) DISA (Defense Information Systems Agency)	$8,408,746	0.5%	Rank history: #33 in FY2022, #45 in FY2023, #39 in FY2024 and #38 in FY2025; up 23 since FY2020.
24	David-James LLC Top agencies HHS (Department of Health and Human Services)	$7,713,997	0.4%	Rank history: #24 in FY2022, #25 in FY2023, #24 in FY2024 and #47 in FY2025; up 62 since FY2020.
25	Lewis & Ellis, LLC Top agencies HHS (Department of Health and Human Services)	$7,611,359	0.4%	Rank history: #30 in FY2022 and not on the FY2023–FY2025 lists; up 8 since FY2020.
26	Castro & Company, LLC Top agencies HHS (Department of Health and Human Services) PBGC (Pension Benefit Guaranty Corporation) Treasury (Department of the Treasury)	$7,476,689	0.4%	Rank history: #25 in FY2022, #16 in FY2023, #16 in FY2024 and #15 in FY2025; up 5 since FY2020.
27	The Boston Consulting Group Inc Through BCG Federal Corp. Top agencies Navy (Department of the Navy)	$6,994,273	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
28	TFC Consulting Inc. Top agencies DHS (Department of Homeland Security) DOT (Department of Transportation) DHRA (Defense Human Resources Activity)	$6,885,595	0.4%	Rank history: #47 in FY2022 and not on the FY2023–FY2025 lists; up 9 since FY2020.
29	Deloitte & Touche LLP Top agencies OSD (Office of the Secretary of Defense) USAF (Department of the Air Force)	$6,697,408	0.4%	Rank history: not on the FY2022–FY2025 lists; up 14 since FY2020.
30	Booth Management Consulting, LLC Top agencies DOE (Department of Energy) SSA (Social Security Administration) DOI (Department of the Interior)	$6,193,177	0.3%	Rank history: #37 in FY2022, #34 in FY2023, #75 in FY2024 and not on the FY2025 list; up 10 since FY2020.
31	Bland & Associates PC Top agencies HHS (Department of Health and Human Services) DOI (Department of the Interior)	$6,033,243	0.3%	Rank history: #41 in FY2022, #59 in FY2023, #86 in FY2024 and #49 in FY2025; up 34 since FY2020.
32	Saint George Consulting Inc. Top agencies VA (Department of Veterans Affairs) DOI (Department of the Interior) Navy (Department of the Navy)	$5,712,050	0.3%	Rank history: #44 in FY2022, #33 in FY2023, #34 in FY2024 and #29 in FY2025; up 260 since FY2020.
33	Cohnreznick LLP Top agencies DOE (Department of Energy) HHS (Department of Health and Human Services) DHS (Department of Homeland Security)	$5,618,679	0.3%	Rank history: #18 in FY2022, #15 in FY2023, #21 in FY2024 and #36 in FY2025; up 3 since FY2020.
34	Summit Consulting LLC Top agencies HUD (Department of Housing and Urban Development) SBA (Small Business Administration) DOI (Department of the Interior)	$5,366,094	0.3%	Rank history: #36 in FY2022 and not on the FY2023–FY2025 lists; up 142 since FY2020.
35	Lyceum Business Services, LLC Top agencies HHS (Department of Health and Human Services)	$5,312,176	0.3%	Rank history: #70 in FY2022, not on the FY2023–FY2024 lists and #23 in FY2025; up 18 since FY2020.
36	Psi Pax, Inc. Top agencies Navy (Department of the Navy)	$5,165,808	0.3%	Rank history: #35 in FY2022, #44 in FY2023, #42 in FY2024 and not on the FY2025 list; up 15 since FY2020.
37	Reed & Associates, Cpas, Inc. Top agencies HHS (Department of Health and Human Services) DOI (Department of the Interior)	$5,068,669	0.3%	Rank history: #34 in FY2022, #47 in FY2023, #44 in FY2024 and #37 in FY2025; up 4 since FY2020.
38	Research Triangle Institute Top agencies ED (Department of Education) DOJ (Department of Justice)	$4,897,871	0.3%	Rank history: #8 in FY2022, #7 in FY2023, #8 in FY2024 and #8 in FY2025; down 27 since FY2020.
39	Science Applications International Corporation 2 awardees, including Engility Services, LLC Top agencies USAF (Department of the Air Force)	$4,881,993	0.3%	Rank history: #38 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
40	FM Talent Source, LLC Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture) ED (Department of Education)	$4,826,001	0.3%	Rank history: #48 in FY2022, #21 in FY2023, #19 in FY2024 and #16 in FY2025; down 2 since FY2020.
41	HMS Holdings Corp. Through Cotiviti GOV Services, LLC Top agencies HHS (Department of Health and Human Services)	$4,725,000	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
42	Wichita Tribe Industrial Development Commission Through Wichita Tribal Enterprises, LLC Top agencies NASA (National Aeronautics and Space Administration)	$4,671,711	0.3%	Rank history: #63 in FY2022 and not on the FY2023–FY2025 lists; up 19 since FY2020.
43	Vintun LLC Top agencies Army (Department of the Army)	$4,516,033	0.2%	Rank history: not on the FY2022 list, #48 in FY2023, #10 in FY2024 and #25 in FY2025; down 9 since FY2020.
44	Lani EKO & Company, Cpas, PLLC Top agencies USAID (US Agency for International Development) DOJ (Department of Justice) Treasury (Department of the Treasury)	$3,971,796	0.2%	Rank history: #53 in FY2022 and not on the FY2023–FY2025 lists; up 11 since FY2020.
45	Total Solutions Inc. Top agencies DHS (Department of Homeland Security)	$3,649,907	0.2%	Rank history: #52 in FY2022, #57 in FY2023 and not on the FY2024–FY2025 lists; up 45 since FY2020.
46	Mantech International Corporation Through Mantech Mgs, Inc. Top agencies DTRA (Defense Threat Reduction Agency)	$3,631,654	0.2%	Rank history: not on the FY2022–FY2025 lists; down 25 since FY2020.
47	Stout Risius Ross, LLC Top agencies DOJ (Department of Justice)	$3,541,129	0.2%	Rank history: #100 in FY2022 and not on the FY2023–FY2025 lists; down 2 since FY2020.
48	Definitive Logic Corporation Top agencies Treasury (Department of the Treasury)	$3,531,459	0.2%	Rank history: not on the FY2022–FY2025 lists; down 6 since FY2020.
49	Horus Technology Solutions, Inc. Top agencies HHS (Department of Health and Human Services)	$3,380,505	0.2%	Rank history: #43 in FY2022, #58 in FY2023 and not on the FY2024–FY2025 lists; up 23 since FY2020.
50	Kingstonville-Mercadien JV LLC Top agencies SBA (Small Business Administration)	$3,311,666	0.2%	Rank history: #50 in FY2022, #54 in FY2023, #62 in FY2024 and #86 in FY2025; up 6 since FY2020.
51	Davis Farr LLP Top agencies HHS (Department of Health and Human Services) DCAA (Defense Contract Audit Agency) USDA (Department of Agriculture)	$3,185,329	0.2%	Rank history: #39 in FY2022, #43 in FY2023, #45 in FY2024 and #54 in FY2025; down 12 since FY2020.
52	Asset Management Outsourcing Recoveries Inc. Through Receivia, Inc. Top agencies VA (Department of Veterans Affairs)	$3,089,284	0.2%	Rank history: not on the FY2022–FY2025 lists; up 2 since FY2020.
53	BAE Systems PLC Through BAE Systems Technology Solutions & Services Inc. Top agencies PBGC (Pension Benefit Guaranty Corporation)	$2,994,610	0.2%	Rank history: #51 in FY2022, #60 in FY2023, #50 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
54	FI Consulting, Inc. Top agencies DHS (Department of Homeland Security) Treasury (Department of the Treasury)	$2,973,588	0.2%	Rank history: #71 in FY2022, #38 in FY2023, #35 in FY2024 and #59 in FY2025; up 8 since FY2020.
55	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top agencies Navy (Department of the Navy)	$2,827,457	0.2%	Rank history: not on the FY2022–FY2025 lists; down 32 since FY2020.
56	Mindseeker, Inc. Top agencies Army (Department of the Army)	$2,818,471	0.2%	Rank history: #46 in FY2022, #81 in FY2023 and not on the FY2024–FY2025 lists; down 8 since FY2020.
57	Tichenor & Associates, LLP Top agencies USAID (US Agency for International Development) USDA (Department of Agriculture) DOT (Department of Transportation)	$2,739,837	0.1%	Rank history: not on the FY2022 list, #85 in FY2023, #53 in FY2024 and #71 in FY2025; up 39 since FY2020.
58	Gka, P.C. Top agencies USAID (US Agency for International Development) Treasury (Department of the Treasury) EOP (Executive Office of the President)	$2,731,397	0.1%	Rank history: #54 in FY2022, #62 in FY2023 and not on the FY2024–FY2025 lists; up 10 since FY2020.
59	Futrend Technology Inc. Top agencies HHS (Department of Health and Human Services)	$2,682,359	0.1%	Rank history: #62 in FY2022, #55 in FY2023, #76 in FY2024 and #62 in FY2025; up 4 since FY2020.
60	FMR Consulting Inc. Top agencies ED (Department of Education)	$2,623,198	0.1%	Rank history: #59 in FY2022, not on the FY2023–FY2024 lists and #56 in FY2025; up 7 since FY2020.
61	Axiom Corporation Top agencies VA (Department of Veterans Affairs)	$2,436,891	0.1%	Rank history: #90 in FY2022, #89 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
62	Brsi, LP Top agencies DHA (Defense Health Agency)	$2,221,376	0.1%	Rank history: #65 in FY2022, #46 in FY2023 and not on the FY2024–FY2025 lists; down 13 since FY2020.
63	Tuba Group, Inc. Top agencies DOT (Department of Transportation) Army (Department of the Army) HHS (Department of Health and Human Services)	$2,185,099	0.1%	Rank history: #72 in FY2022, not on the FY2023 list, #78 in FY2024 and #46 in FY2025; up 10 since FY2020.
64	Harper Rains Knight & Co Pa Top agencies DOL (Department of Labor) SSA (Social Security Administration) EEOC (Equal Employment Opportunity Commission)	$2,181,447	0.1%	Rank history: #61 in FY2022, #61 in FY2023, #54 in FY2024 and #51 in FY2025; up 16 since FY2020.
65	Innovative Computing & Applied Technology LLC Top agencies DOT (Department of Transportation)	$2,160,159	0.1%	Rank history: #73 in FY2022, #77 in FY2023, #70 in FY2024 and not on the FY2025 list; up 12 since FY2020.
66	ITC Federal, LLC Top agencies DOJ (Department of Justice) Treasury (Department of the Treasury)	$2,143,391	0.1%	Rank history: #45 in FY2022, #53 in FY2023, #60 in FY2024 and #53 in FY2025; up 16 since FY2020.
67	Allmond & Co, LLC Top agencies HHS (Department of Health and Human Services) HUD (Department of Housing and Urban Development) EPA (Environmental Protection Agency)	$2,114,560	0.1%	Rank history: #58 in FY2022, #69 in FY2023, #47 in FY2024 and #76 in FY2025; up 2 since FY2020.
68	Index Systems Inc. Top agencies DHRA (Defense Human Resources Activity)	$2,088,792	0.1%	Rank history: not on the FY2022–FY2025 lists; up 6 since FY2020.
69	Rigil Corporation Top agencies DOT (Department of Transportation)	$2,082,891	0.1%	Rank history: #67 in FY2022, #78 in FY2023 and not on the FY2024–FY2025 lists; down 11 since FY2020.
70	Francis Awoyera & Associates, P.C Top agencies HUD (Department of Housing and Urban Development)	$1,961,054	0.1%	Rank history: #75 in FY2022, #79 in FY2023, #87 in FY2024 and not on the FY2025 list; up 9 since FY2020.
71	RMW Associates, LLC Top agencies DOT (Department of Transportation)	$1,863,462	0.1%	Rank history: #87 in FY2022 and not on the FY2023–FY2025 lists; up 62 since FY2020.
72	Premier Group Services Inc. Top agencies HUD (Department of Housing and Urban Development) Commerce (Department of Commerce) SBA (Small Business Administration)	$1,770,744	0.1%	Rank history: #55 in FY2022, #74 in FY2023, #41 in FY2024 and not on the FY2025 list; up 13 since FY2020.
73	Serco North America (Holdings) Inc Through Serco Inc. Top agencies USAF (Department of the Air Force)	$1,757,807	0.1%	Rank history: #69 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
74	Regis & Associates, PC Top agencies DOL (Department of Labor) NASA (National Aeronautics and Space Administration)	$1,640,444	0.1%	Rank history: #68 in FY2022, #82 in FY2023 and not on the FY2024–FY2025 lists; up 25 since FY2020.
75	Northrop Grumman Corporation Through Northrop Grumman Systems Corporation Top agencies Army (Department of the Army)	$1,640,141	0.1%	Rank history: not on the FY2022–FY2025 lists; up 29 since FY2020.
76	Ascella Technologies, Inc. Top agencies SEC (Securities and Exchange Commission)	$1,621,021	0.1%	Rank history: not on the FY2022–FY2025 lists; up 2 since FY2020.
77	Babb Maldonado & Associates, LLC Top agencies SBA (Small Business Administration)	$1,614,296	0.1%	Rank history: not on the FY2022–FY2025 lists; down 2 since FY2020.
78	Hamilton Samlin Milligan, LLC Top agencies DOT (Department of Transportation)	$1,606,617	0.1%	Rank history: #97 in FY2022 and not on the FY2023–FY2025 lists; up 25 since FY2020.
79	Douglas, Sheets, and Stremcha, Cpas, LLC Top agencies HHS (Department of Health and Human Services)	$1,589,946	0.1%	Rank history: #77 in FY2022, not on the FY2023 list, #55 in FY2024 and #68 in FY2025; up 4 since FY2020.
80	Chevo LLC Top agencies Treasury (Department of the Treasury)	$1,529,374	0.1%	Rank history: #80 in FY2022, #84 in FY2023 and not on the FY2024–FY2025 lists; up 37 since FY2020.
81	Mathematica Inc Top agencies HHS (Department of Health and Human Services)	$1,484,306	0.1%	Rank history: #82 in FY2022, #30 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2020.
82	Tesla Laboratories Inc. Top agencies DHS (Department of Homeland Security)	$1,459,680	0.1%	Rank history: not on the FY2022–FY2025 lists; up 10 since FY2020.
83	Elitebco LLC Top agencies HUD (Department of Housing and Urban Development) USAID (US Agency for International Development)	$1,330,679	0.1%	Rank history: #64 in FY2022, not on the FY2023 list, #72 in FY2024 and #84 in FY2025; up 26 since FY2020.
84	Empirical Corporation Top agencies HHS (Department of Health and Human Services) Commerce (Department of Commerce) DHS (Department of Homeland Security)	$1,329,811	0.1%	Rank history: #86 in FY2022, #92 in FY2023 and not on the FY2024–FY2025 lists; down 3 since FY2020.
85	Deva & Associates PC Top agencies DHS (Department of Homeland Security) NRC (Nuclear Regulatory Commission) Treasury (Department of the Treasury)	$1,314,540	0.1%	Rank history: #83 in FY2022 and not on the FY2023–FY2025 lists; down 14 since FY2020.
86	Crisis1, LLC Top agencies DHS (Department of Homeland Security)	$1,253,697	0.1%	Rank history: #85 in FY2022, #76 in FY2023, #74 in FY2024 and #64 in FY2025; up 36 since FY2020.
87	Alexton Incorporated Top agencies DOE (Department of Energy)	$1,204,438	0.1%	Rank history: #92 in FY2022, #86 in FY2023 and not on the FY2024–FY2025 lists; up 103 since FY2020.
88	EGS Inc. Top agencies DOI (Department of the Interior)	$1,194,759	0.1%	Rank history: not on the FY2022–FY2025 lists; up 63 since FY2020.
89	Case Healthcare Solutions, Inc. Top agencies DHA (Defense Health Agency)	$1,164,365	0.1%	Rank history: not on the FY2022–FY2025 lists; up 12 since FY2020.
90	Creative Solutions Consulting Inc. Top agencies DMEA (Defense Microelectronics Activity)	$1,158,353	0.1%	Rank history: not on the FY2022–FY2025 lists; up 25 since FY2020.
91	CRW and Associates, LLC Top agencies Army (Department of the Army)	$1,157,965	0.1%	Rank history: not on the FY2022–FY2025 lists; down 21 since FY2020.
92	RMA Associates LLC Top agencies DODIG (Department of Defense Inspector General) HHS (Department of Health and Human Services) PCLOB (Privacy and Civil Liberties Oversight Board)	$1,137,413	0.1%	Rank history: #66 in FY2022, #75 in FY2023, #97 in FY2024 and not on the FY2025 list; down 57 since FY2020.
93	Raft LLC Top agencies HHS (Department of Health and Human Services)	$1,093,482	0.1%	Rank history: #93 in FY2022 and not on the FY2023–FY2025 lists; unchanged since FY2020.
94	Immersion Consulting LLC Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security)	$1,084,249	0.1%	Rank history: not on the FY2022 list, #66 in FY2023, #91 in FY2024 and #72 in FY2025; up 13 since FY2020.
95	DRT Strategies, Inc. Top agencies DOJ (Department of Justice)	$1,073,269	0.1%	Rank history: not on the FY2022–FY2025 lists; down 7 since FY2020.
96	Covice Tax Solutions LLC Top agencies DLA (Defense Logistics Agency)	$1,000,000	0.1%	Rank history: #81 in FY2022, #41 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
97	Pohaku Pacific LLC Top agencies USAF (Department of the Air Force)	$983,962	0.1%	Rank history: #99 in FY2022 and not on the FY2023–FY2025 lists; up 42 since FY2020.
98	Dt-Trak Consulting, Inc. Top agencies HHS (Department of Health and Human Services)	$935,130	0.1%	Rank history: #88 in FY2022, not on the FY2023 list, #96 in FY2024 and not on the FY2025 list; up 14 since FY2020.
99	ST. Michael's Inc. Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force)	$912,106	<0.1%	Rank history: not on the FY2022 list, #40 in FY2023, #79 in FY2024 and #39 in FY2025; up 25 since FY2020.
100	Ruchman and Associates, Inc. Top agencies DHS (Department of Homeland Security)	$877,526	<0.1%	Rank history: #94 in FY2022 and not on the FY2023–FY2025 lists; up 14 since FY2020.

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100 of 272 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 54121

Code	Net obligations	Largest contractor
541211 Offices of Certified Public Accountants	$1,049,456,427	Ernst & Young LLP
541219 Other Accounting Services	$658,078,861	Deloitte LLP

How this ranking works

Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $1.84 billion obligated before deobligations, so they never pass 100%.
Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
Fiscal year 2021 ran Oct 1, 2020 – Sep 30, 2021. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
Rank changes compare with FY2020. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2020 takes the color of the rank change beside it.
Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 NAICS 54121 contractors in FY2021?

1. Kpmg L.L.P. ($365M), 2. Ernst & Young LLP ($348M), 3. Deloitte LLP ($247M), 4. Kearney & Company, P.C. ($158M), 5. Avantus Federal LLC ($79.2M), 6. Haynes, Inc. ($32.1M), 7. Myers and Stauffer LC ($27.7M), 8. CBE Group Inc. the ($27.3M), 9. Verato, Inc. ($21.8M), 10. Guidehouse Inc. ($21.3M).

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