| Ranking Mexico | International Affiliation | Ranking World | 2001 | Mexico recent year's fee Income (US$/m) | Firms in Mexico | Offices | Total Staff | Clients | |
| 1 | PWC | 1 | 21,574.0 | $189.90 | PWC | 18 | 3,100 | n/a | |
| 2 | Deloitte Touche Tohmatsu | 2 | 12,400.0 | $110.00 | Galaz | 20 | 2,200 | n/a | |
| 3 | Ernst & Young Global | 4 | 9,900.0 | $106.70 | Mancera | 21 | 1,900 | n/a | |
| 4 | KPMG International | 3 | 11,700.0 | $81.00 | Cardenas Dosal | 15 | 1,400 | n/a | |
| 5 | Grant Thorton International | 6 | 1,789.0 | $21.60 | Sallez Sainz | 5 | 500 | n/a | |
| 6 | Moore Stephens International LTD | 16 | 686.6 | $21.10 | Cedillo, De Los Santos, Del Barrio | 19 | 1,100 | n/a | |
| 7 | BDO International | 5 | 2,203.0 | $20.50 | Hernandez Lozano Marrón | 11 | 500 | n/a | |
| 8 | Nexia International | 11 | 1,189.0 | $15.40 | Gossler | 23 | 700 | 2500 | |
| 9 | RSM International | 7 | 1,632.2 | $14.70 | Ramón Cardenas | 29 | 700 | n/a | |
| >> | 10 | PKF North American Network | 18 | 500.0 | $12.20 (2001=$9.20) | Lores Rodríguez y Cía.S.C. | 33 | 950 | 2170 |
| 11 | MRI | 9 | 1,381.0 | $12.00 | Freyssinier | 32 | 700 | n/a | |
| 12 | Baker Tilly International | 30 | $9.50 | Audimex, Maynes + Barriguete Alonso | n/a | n/a | n/a | ||
| 13 | MacIntyre Strater MSI | 17 | 520.0 | $9.40 | Rivero y Olivares | 9 | 332 | n/a | |
| 14 | DFK International | 22 | 392.3 | $8.20 | De La Paz y Costemalle, S.C. | 19 | 470 | n/a | |
| 15 | Horwath International | 8 | 1,447.0 | $7.00 | Castillo Miranda | n/a | n/a | n/a | |
| 16 | HLB International | 13 | 875.0 | $6.00 | Lebrija | 22 | 560 | n/a | |
| 17 | PKF International | 15 | 781.0 | $5.80 | 5 | 238 | n/a | ||
| 18 | SC International | 23 | 354.2 | $4.50 | Solloa | 5 | 246 | n/a | |
| 19 | GMN International | 29 | 134.9 | $4.00 | Manuel Duran Silva, SC | n/a | n/a | n/a | |
| 20 | MGI Midsell International Group | 25 | 245.0 | $3.90 | Zavala y Gutierrez/Bargallo Cardoso | 9 | 235 | n/a | |
| 21 | BKR International | 20 | 477.0 | $3.40 | Manuel Rangel | 7 | 137 | n/a | |
| 22 | ACPA International | 28 | 144.5 | $3.30 | 58 | 227 | n/a | ||
| 23 | IGAF LTD | 19 | 492.8 | $2.40 | 12 | 98 | n/a | ||
| 24 | INPACT Americas | 24 | 256.2 | $1.50 | Soto Prieto y Cia, S.C. | n/a | n/a | n/a | |
| 25 | IA International | 26 | 205.5 | $0.60 | 2 | 49 | n/a | ||
| 26 | KS International | 27 | 180.7 | $0.50 | Vargas, Ruiz SC | n/a | n/a | n/a | |
| 27 | Morison International | 21 | 452.7 | $0.20 | Morison, Macias, Sam y Asociados | 2 | 15 | n/a | |
| 28 | Baker Tilly International | 10 | 1,209.0 | n/a | Maynes | n/a | n/a | n/a | |
| 29 | Fiducial | 12 | 1,050.0 | n/a | n/a | n/a | n/a | ||
| 30 | AGN | 14 | 839.0 | n/a | Prieto Ruiz de Velazco | n/a | n/a | n/a | |