| Effective dates | Rate of relief | |
| Control Holdings | | | |
| 07/04/76 - 26/10/77 | 30% | s.73 & Sch 10 FA 78 |
| 27/10/77 - 09/03/92 | 50% | s.64 FA 1978 |
| 10/03/92 - 05/04/26 | 100% | s.73 & Sch 14 FA (No 2) 1992 |
| 06/04/26 onwards | 100% capped at £2.5 million and 50% thereafter | Sch 12 FA 2026 |
| Minority Holdings in excess of 25% of company’s voting share capital | | | |
| 27/10/77 - 14/03/83 | 20% | |
| 15/03/83 - 16/03/87 | 30% | |
| 17/03/87 - 09/03/92 | 50% | ss.104 & 105 IHTA 1984 |
| 10/03/92 - 05/04/26 | 100% | amended by s.58 & paras 4 & 5 of Sch 8 FA 1987 |
| 06/04/26 onwards | 100% capped at £2.5 million and 50% thereafter | Sch 12 FA 2026 |
| Minority Holdings carrying less than 25% of company’s voting share capital | | | |
| 27/10/77 - 14/03/83 | 20% | s.64 FA 1978 |
| 15/03/83 - 09/03/92 | 30% | s.10 FA (No. 2) 1983 |
| 10/03/92 - 05/04/96 | 50% | s.73 & Sch 14 FA (No 2) 1992 |
| 06/04/96 - 05/04/26 | 100% | s.184(2) FA 1996 |
| 06/04/26 onwards | 100% capped at £2.5 million and 50% thereafter | Sch 12 FA 2026 |
| U.S.M. Companies | Relief withdrawn as from 17/03/87 | 0% | ss.104 & 105 IHTA 1984 / amended by s.58 & paras 4 & 5 of Sch 8 FA 1987 |
| U.S.M. / A.I.M. / OFEX & Rule 4(2) Companies | 10/03/92- 05/04/26 | | as for minority holdings of less than 25% of voting ISC |
| Shares listed on a market that is not recognised as ‘listed’ for HMRC purposes, e.g A.I.M, or a foreign stock exchange | 06/04/26 | 50% | Sch12 FA 2026 |
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