Executive Summary: Key Legal and Evidentiary Issues

• Frontier Lithium Inc. sought judicial review of a Canada Revenue Agency decision denying it authorization to make a late second renunciation of Canadian exploration expenses under the Income Tax Act.
   
• The dispute centered on whether subsection 66(12.6) permitted renunciation of expenses incurred within the statutory 24-month general rule period despite a shorter termination date set out in the parties' subscription agreements.
   
• Justice Régimbald found that the CRA's reasons failed to show a genuine analysis of the text, context, and purpose of subsections 66(15), 66(12.6), and 66(12.741) of the Income Tax Act.
   
• Procedural fairness was not breached, as Frontier had adequate notice of the case it needed to meet and a full opportunity to respond before the decision was made.
   
• Both the CRA's technical feasibility finding and its discretionary "just and equitable" finding were held unreasonable, with the latter improperly influenced by the former.
   
• The Court set aside the CRA's decision, remitted the matter for reconsideration, and awarded Frontier a lump sum in costs.

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Facts of the case

Frontier Lithium Inc. is a pre-revenue lithium exploration company developing a project in Ontario. To finance its operations, Frontier relied on the flow-through share program under section 66 of the Income Tax Act, which allows a corporation to renounce Canadian exploration expenses (CEE) to investors. On December 14, 2021 [also referenced as December 15, 2021 at para 16 of the source], Frontier entered into subscription agreements with 40 investors, raising approximately $12M, and committed to incur the CEE by December 31, 2022, so that the "look-back" rule under subsection 66(12.66) could apply, allowing investors to deduct the amount in their 2021 taxation year. Frontier renounced the full $12M on February 7, 2022, even though the expenses had not yet been incurred.

Due to permitting delays — caused by additional consultations required with a First Nation and a house fire tragedy in a First Nation community — Frontier was unable to incur the full $12M by the December 31, 2022 deadline. It ultimately incurred only about $7M in time, with the remaining $5M incurred in 2023. As a result, the renunciation to investors had to be reduced from $12M to $7M, creating tax consequences for the investors and triggering an indemnity obligation under the subscription agreements.

Following a CRA audit that concluded in late 2024, Frontier notified the CRA in January 2025 of its intention to make a second renunciation of the $5M in CEE incurred in 2023, relying on the 24-month general rule period under subsection 66(12.6), and sought the Minister's authorization for a late renunciation under subsection 66(12.741). The CRA issued a Position Letter on April 25, 2025, concluding that a second renunciation was not technically feasible because the subscription agreements limited renunciation to the look-back rule with a termination date of December 31, 2022. On June 18, 2025, the CRA issued its Decision formally denying Frontier's request, both on technical feasibility grounds and on the basis that authorization would not be "just and equitable."

Policy and legislative provisions at issue

The case turned on the interaction of several provisions of the Income Tax Act governing flow-through shares. Subsection 66(15) defines a "flow-through share" as one issued under a written agreement in which the corporation agrees to incur CEE within 24 months and to renounce that CEE to the investor. Subsection 66(12.6) — the "general rule period" — permits a corporation to renounce CEE incurred within 24 months after the agreement was made. Subsection 66(12.66) — the "look-back" rule — allows CEE incurred in a given year to be deemed incurred on December 31 of the prior year, provided specific conditions are met. Subsection 66(12.741) allows the Minister to authorize a late renunciation where it would be "just and equitable" to do so. Subsection 66(12.6001), enacted during the COVID-19 pandemic, temporarily extended the 24-month general rule period to 36 months without amending any agreement-specific periods.

The parties disputed whether the "agreement" referenced in subsections 66(15) and 66(12.6) must itself specify the exact period during which CEE could be renounced, or whether it need only reflect the corporation's agreement to incur CEE within the statutory 24-month period, independent of any shorter commercial deadline the parties privately adopted. The CRA had relied in part on a prior decision, Capstone Power Corporation v 1177719 Alberta Ltd., in reaching its interpretation.

Reasoning and analysis

The Court applied a reasonableness standard to the CRA's interpretation of its home statute and to its interpretation of the subscription agreements, rejecting Frontier's argument that a correctness standard should apply. Applying a "reasons first" approach, the Court found that the CRA had not shown a genuine, non-tendentious analysis of the text, context, and purpose of subsections 66(15) and 66(12.6). The CRA did not adequately explain why the subscription agreements' shorter termination date precluded renunciation within the broader statutory general rule period, nor did it meaningfully respond to Frontier's argument that it was not seeking to rectify or amend the agreements but simply to make a new renunciation of CEE never previously renounced. The Court also found that the CRA's reliance on Capstone was of limited value, since that case concerned an attempt to rectify a subscription agreement rather than the distinct question of whether a second renunciation was independently available under the general rule period.

On procedural fairness, the Court held that the duty owed to Frontier in the exercise of the Minister's discretion under subsection 66(12.741) was low, and that Frontier had been given adequate notice of the case to meet and a full opportunity to make submissions, including through its detailed May 16, 2025 letter. The Court rejected Frontier's argument that the CRA had changed the case to meet or given a legitimate expectation that the "just and equitable" criterion was not in dispute.

On the discretionary "just and equitable" finding, the Court held that the CRA failed to meaningfully grapple with Frontier's argument regarding potential financial devastation and the risk of scaling down or discontinuing operations, dismissing the issue with only a summary reference to Frontier's "lack of forethought." The Court further found that the CRA's discretionary reasoning was coloured by, and partly circular in relation to, its unreasonable technical feasibility finding, since the CRA continued to rely on Frontier's failure to amend the subscription agreements "sooner" even when assessing the separate discretionary question.

Ruling and overall outcome

The application for judicial review was granted in favour of Frontier Lithium Inc. The Court found that the CRA's decision denying authorization for the late second renunciation of CEE was unreasonable on both the technical feasibility issue under subsection 66(12.6) and the discretionary "just and equitable" issue under subsection 66(12.741), while finding no breach of procedural fairness. The Minister's decision was set aside and the matter remitted back to the Minister for reconsideration in accordance with the Court's reasons. As agreed between the parties, Frontier was awarded costs in a lump sum of $7,500, plus disbursements.