Schedule
Original text. Later amendments are not shown.
| Provisions of the Social Security Act 1973 | Subject matter | Appointed day |
| Section 1 and Schedule 1 | Outline of basic scheme contributory system | 6th April 1975 |
| Section 2 | Class 1 contributions | 6th April 1975 |
| Section 3 | Class 2 contributions | 6th April 1975 |
| Section 4 | Class 3 contributions | 6th April 1975 |
| Section 5 and Schedule 2 | Class 4 contributions | 6th April 1975 |
| Section 6 | General power to limit, and otherwise regulate, liability for contributions | 6th April 1975 |
| Section 9 | Descriptions of benefits; the earnings factor; crediting of contributions | 6th April 1975 |
| Schedule 3 | Contribution conditions for basic scheme benefit | 6th April 1975 |
| Section 36 | Review of provision for chronically sick and disabled persons | 19th July 1973 |
| Section 42 | Married women, widows, etc | 6th April 1975 |
| Section 48 and Schedule 12 | National Insurance Advisory Committee and its functions | 19th July 1973 |
| Section 77 | Reserve scheme contributions | 6th April 1975 |
| Section 78 and Schedule 19 | Reserve scheme premium on termination of recognised pensionable employment | 6th April 1975 |
| Section 95(1) in relation only to the following provision | Application of Parts II and III of the Act to Northern Ireland | 19th July 1973 |
| Section 96 | Orders and regulations (general provisions) | 19th July 1973 |
| Section 97 | Parliamentary control of orders and regulations | 19th July 1973 |
| Section 99 | Interpretation | 19th July 1973 |
| Section 101 | Citation and commencement | 19th July 1973 |