Company: RTNTF
Filing Date: 2025-02-20
Form Type: 20-F
Source: 0001628280-25-006642
Chunk: 310

Company: RIO TINTO LTD
Filing Date: 2025-02-20
Form: 20-F
Chunk 310
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. In estimating value in use, the present value of future cash flows in foreign currencies is translated at the spot exchange rate on the testing date. Generally, discounted cash flow models are used to determine the recoverable amount of CGUs. In this case, significant judgement is required to determine the appropriate estimates and assumptio ns used, and there is significant estimation uncertainty. In particular, for fair value less costs of disposal valuations, judgement is required to determine the estimates a market participant would use. The discounted cash flow models are most sensitive to the following estimates: the timing of project expansions; the cost to complete assets under construction; long-term commodity prices; production timing and recovery rates; exchange rates; operating costs; reserve and resource estimates; closure costs; discount rates; allocation of long-term contract revenues between CGUs; and, in some instances, the renewal of mining licences. Some of these variables are unique to an individual CGU. Future changes in these variables may differ from management’s expectations and may materially alter the recoverable amounts of the CGUs.

| Annual Report on Form 20-F 2024 | 172 | riotinto.com |

Financial statements | Notes to the consolidated financial statements

4 Impairment charges net of reversals continued

|                                                                  |      |              2024 |              |                             |               |              2023 |              2022 |
|                                                                  | Note | Pre-taxamountUS$m | TaxationUS$m | Non-controllinginterestUS$m | NetamountUS$m | Pre-taxamountUS$m | Pre-taxamountUS$m |
| Aluminium - Alumina refineries                                   |      |              -461 |          -42 | –                           |          -503 |            -1,175 |                 – |
| Aluminium - Tiwai Point                                          |      |                41 |           37 | –                           |            78 |                 – |                 – |
| Aluminium - MRN                                                  |      |               -23 |            – | –                           |           -23 |                 – |                 – |
| Aluminium – Pacific Aluminium                                    |      |                 – |            – | –                           |             – |                 – |              -202 |
| Minerals - Diavik                                                |      |              -118 |           32 | –                           |           -86 |                 – |                 – |
| Other operations - Simandou                                      |      |                 – |            – | –                           |             – |               239 |                 – |
| Other operations - Roughrider