Schedule
| Year of Assessment | Earnings Cap (£) | |
|---|---|---|
| 1973–74 | 10,800 | |
| 1974–75 | 12,000 | |
| 1975–76 | 14,400 | |
| 1976–77 | 18,600 | |
| 1977–78 | 21,600 | |
| 1978–79 | 24,600 | |
| 1979–80 | 27,000 | |
| 1980–81 | 31,800 | |
| 1981–82 | 37,200 | |
| 1982–83 | 42,000 | |
| 1983–84 | 44,400 | |
| 1984–85 | 46,800 | |
| 1985–86 | 49,200 | |
| 1986–87 | 52,200 | |
| 1987–88 | 54,600 | |
| 1988–89 | 60,000 |