| 1972 |
Member, All India Congress Committee (A.I.C.C.) |
| 1973-76 |
President, Youth Congress, Tamil Nadu |
| 1976-77 |
General-Secretary, Pradesh Congress Committee (P.C.C.), Tamil Nadu |
| 1984 |
Elected to 8th Lok Sabha |
| 1985 |
Joint Secretary, All India Congress Committee (Indira) [A.I.C.C. (I)] |
| Sep. 1985 |
Union Deputy Minister, Commerce |
| 1985-86 |
Union Deputy Minister, Personnel, Administrative Reforms, Training Public Grievances and Pensions |
| 1986-89 |
Union Minister of State, Home Affairs (Internal Security) |
| 1989 |
Re-elected to 9th Lok Sabha (2nd term) |
| 1990 |
Member, Committee to review Lok Sabha Secretariat Rules, 1955;Member, Consultative Committee constituted under the Punjab State Legislature (Delegation of Powers) Act, 1987 |
| 1990-91 |
Member, Public Accounts Committee;Member, Consultative Committee, Ministry of Finance |
| 1991 |
Re-elected to 10th Lok Sabha (3rd term) |
| 1991-1992 and 1995-96 |
Union Minister of State, Commerce (Independent Charge) |
| 1996 |
Re-elected to 11th Lok Sabha (4th term) |
| 1996-98 |
Union Cabinet Minister, Finance (with additional charge of Law, Justice and Company Affairs, June 1996 and held charge of Company Affairs till April 1997) |
| 1998 |
Re-elected to 12th Lok Sabha (5th term) |
| 1998-99 |
Member, Committee of Privileges;Member, Committee on Finance |
|
;Member, Consultative Committee, Ministry of External Affairs |
| 2004 |
Re-elected to 14th Lok Sabha (6th term) |
| 23 May 2004 - 30 Nov 2008 |
Union Cabinet Minister, Finance |
| 1 Dec.2008-2009 |
Union Cabinet Minister, Home Affairs |
| 2009 |
Re-elected to 15th Lok Sabha (7th term) |
| 23 May 2009 onwards |
Union Cabinet Minister, Home Affairs; |