Manufacturing Inputs and PST Exposure in British Columbia

Teck operates a large refining facility in Trail, British Columbia, where industrial metallurgy processes are used to transform mineral ores into high-purity metals suitable for resale.

The smelting process relies on coal-fired slag fuming furnaces. When the material being refined was primary slag already in a molten state, coal was combusted using lower oxygen levels to create carbon monoxide. That carbon monoxide acted as a reducing agent, extracting metal oxides in gaseous form before they were cooled into a refined solid product.

Where recycled materials were being refined, however, those materials first had to be heated into a molten state before the reduction process could occur. Coal was also used to generate the heat necessary to alter the state of those materials.

The Tax Position Taken by Teck

Historically, Teck purchased its coal exempt from PST and self-assessed tax on the 35% of the coal it recognized as being necessary for the production of heat. The company treated the remaining 65% as exempt, contending that portion qualified as a direct agent used in the manufacturing process and was therefore exempt from PST.

Under subsection 38(2) of the Provincial Sales Tax Exemption and Refund Regulation, purchases of a direct agent used in the manufacturing process may qualify for exemption. However, subsection 38(3) excludes substances or direct agents obtained “…for use to produce energy or as a source of energy…”

Teck argued that although heat was generated during the process, the heat produced by the burning coal was incidental to the coal’s necessity in creating the desired chemical reaction.

The Minister disagreed and assessed PST on the remaining 65% of the coal purchases that Teck contended qualified for exemption.

The Court’s Findings

Ultimately, the British Columbia Supreme Court ruled in favor of the Crown and upheld the assessment.

In its findings, the Court concluded that Teck failed to disprove that the heat generated by the coal was necessary to maintain the desired temperature of the slag during processing. Because the coal contributed to producing the necessary heat energy, the exemption did not apply. A significant factor in the Court’s analysis was the language of the legislation itself.

How the Language of the PST Exemption Impacted the Decision

Many tax provisions—including those found in the British Columbia Provincial Sales Tax Act, the Act Respecting the Quebec Sales Tax, and the Excise Tax Act—rely on qualifying thresholds such as “primarily,” “substantially all,” or “exclusively” to determine whether conditional tax relief applies. Those terms provide a measurable standard for evaluating intended or actual use. That type of threshold did not exist in this case.

The exclusion to the direct agent exemption applied to property obtained “for use to produce energy” without establishing any minimum level or dominant-use test below which the exemption could still apply. As a result, even partial use of coal for energy production was enough to render it PST-taxable.

Broader Implications for Canadian Manufacturers

The Teck decision carries broader implications for manufacturers operating in jurisdictions where conditional exemptions exist for manufacturing inputs.

Many manufacturing materials serve multiple purposes simultaneously—chemical, thermal, mechanical, or utility-related—and those overlapping functions can create unexpected tax exposure if not carefully evaluated. Taxpayers should regularly assess manufacturing inputs and processes where materials may serve more than one operational purpose to ensure they remain compliant with applicable exemption requirements.