Company: SQM
Filing Date: 2025-06-12
Form Type: 6-K
Source: 0000909037-25-000030
Chunk: 32

Company: CHEMICAL & MINING CO OF CHILE INC
Filing Date: 2025-06-12
Form: 6-K
Chunk 32
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 over the following twelve months. Amounts attributable to mining concessions acquired from third parties different from the Chilean Government are recorded at acquisition cost within intangible assets.

The finite useful life of mining properties is calculated using the productive unit method, except for the mining properties owned by Corfo, which have been leased to the Company and grant it the right to exclusively exploit them until December 31, 2030.

Minimum and maximum amortization lives or rates of intangible assets:

42

### Notes to the Consolidated Interim Financial Statements

#### March 31, 2025
| Estimated useful life or amortization rate |     | Minimum Life or Rate   |     | Maximum Life or Rate |
| Water rights                               |     | 1 year                 |     | Indefinite           |
| Rights of way                              |     | Indefinite             |     | Indefinite           |
| Corfo Mining properties (1)                |     | 5 years                |     | 5 years              |
| Mining rights                              |     | Unit-production method |     |                      |
| Intellectual property                      |     | 9 years                |     | 14 years             |
| IT programs                                |     | 1 year                 |     | 7 years              |

( 1) Mining properties owned by CORFO and leased to the Company, which grant it the exclusive right to exploit them until December 31, 2030.

#### 2.22

#### Research and development expenses
Research and development expenses are charged to the statement of income in the period in which the expenditure was incurred.

#### 2.23

#### Exploration and evaluation expenses
The Company holds mining concessions for exploration and exploitation of ore, the Company gives the following treatment to the associated expenses:

Once the rights have been obtained, the Company records the disbursements directly associated with the exploration and evaluation of the deposit in execution as property, plant and equipment (construction in progress) at its cost. These disbursements include the following items: geological surveys, drilling, borehole extraction and sampling, activities related to the technical assessment and commercial viability of the extraction, and in general, any disbursement directly related to specific projects where the objective is to find ore resources. If the technical studies determine that the ore grade is not economically viable, the asset is directly charged to the statement of income. If determined otherwise, the asset described above is associated with the extractable ore tonnage which is amortized as it is used.

(a) Limestone and metallic exploration