TECK RESOURCES LTD

Sensitivity Analysis

The recoverable amount of our Quebrada Blanca CGU exceeded the carrying amount by approximately $600 million at the date of our annual goodwill impairment testing. The recoverable amount of Quebrada Blanca is most sensitive to the long-term copper price assumption and discount rate assumption. In isolation, a US$0.10 decrease in the long-term copper price, or a 30 basis points increase in the discount rate would result in the recoverable amount of Quebrada Blanca being equal to its carrying value.

Significant assumptions used in preparing the discounted cash flow model for our Quebrada Blanca CGU goodwill impairment test include commodity prices, reserves and resources, sales volumes, operating costs, capital expenditures, discount rate and the fair value per pound of copper equivalent used in the determination of thein situ value.

d) Key Assumptions – Quebrada Blanca CGU and Trail CGU

The following are the key assumptions used in our Quebrada Blanca CGU impairment testing calculations for the years ended December 31, 2023 and 2022:

In our 2022 impairment assessment of the Trail CGU, we used long-term assumptions of US$1.25 per pound for zinc, US$277 per tonne for treatment charges, US$0.11 per pound for zinc premiums, a U.S. dollar to Canadian dollar exchange rate of 1.30 and a post-tax real discount rate of 5.5%.