Canada does not have one climate-disclosure rule that applies uniformly to every company. In 2026, reporting teams need to distinguish among three layers: the Canadian Sustainability Disclosure Standards (CSDS), provincial securities requirements, and OSFI Guideline B-15 for federally regulated financial institutions.
The practical question is not simply whether Canada has adopted the ISSB standards. It is which rule applies to which entity, for which reporting period, and with what level of regulatory force.
CSDS 1 and CSDS 2 are available for voluntary use
The Canadian Sustainability Standards Board issued CSDS 1 and CSDS 2 in December 2024. They are based on IFRS S1 and IFRS S2, with Canadian transition relief. Their effective date is January 1, 2025, but an effective date in an accounting standard is not the same as a legal mandate for every Canadian company.
CSDS 1 covers financially material sustainability-related risks and opportunities. CSDS 2 focuses on climate, including governance, strategy, risk management, metrics, targets, and greenhouse gas emissions. Companies using the standards should connect sustainability information to the same reporting entity and financial context as their general-purpose financial reports.
Voluntary adopters can use CSDS to prepare for investor requests, parent-company reporting, financing requirements, or eventual regulation. Multinationals should first map differences between CSDS and the ISSB global baseline rather than assuming the standards are identical in every transition provision.
The CSA paused its climate-disclosure project
On April 23, 2025, the Canadian Securities Administrators said they were pausing work on a new mandatory climate-related disclosure rule. The CSA cited changes in global economic and geopolitical conditions and a desire to support Canadian markets.
That pause matters: Canadian public companies should not describe CSDS as a generally mandated securities-reporting framework. However, the CSA also reminded issuers that existing securities law still requires disclosure of material climate-related risks.
For public companies, the resulting control should have two distinct assessments:
- A legal materiality process for existing continuous-disclosure obligations.
- A separate decision on whether and how to use CSDS voluntarily.
Document the conclusion, the information considered, the responsible decision-makers, and how climate matters were evaluated alongside other business risks.
OSFI B-15 creates mandatory expectations for financial institutions
OSFI Guideline B-15 applies to federally regulated financial institutions, including banks and insurers within its scope. It covers climate-risk governance and management as well as public financial disclosures.
Implementation is phased by institution type and disclosure. Domestic systemically important banks and internationally active insurance groups began core disclosures for fiscal years ending on or after October 1, 2024. Other in-scope federally regulated financial institutions followed for fiscal years ending on or after October 1, 2025. Some cross-industry metrics and Scope 3 requirements have later implementation dates.
OSFI updated B-15 after publication of the final CSDS. Its expectations are informed by the ISSB framework, but institutions should use OSFI’s own implementation table rather than treating voluntary CSDS dates as their regulatory deadline.
For emissions, create a requirement matrix that separates Scope 1, Scope 2, Scope 3, financed emissions, facilitated emissions, insurance-associated emissions, and assets under management. Record the applicable first reporting period, permitted relief, methodology, evidence owner, and review control for each line.
What Canadian companies should build now
Even where CSDS is voluntary, four investments have durable value:
- A reporting-boundary memo. Reconcile the sustainability reporting entity to financial reporting and explain subsidiaries, joint arrangements, and acquisitions.
- A controlled GHG inventory. Define source owners, calculation methods, factor versions, estimation rules, and approval evidence in a GHG inventory management plan.
- A climate materiality process. Connect identified risks and opportunities to strategy, financial planning, risk registers, and management reporting.
- An evidence index. Preserve the source, preparer, reviewer, methodology, change history, and sign-off supporting every material statement and metric.
Financial institutions should add an explicit B-15 compliance owner and board reporting calendar. Other companies can scale the same architecture to voluntary CSDS reporting without representing that voluntary alignment is regulatory compliance.
A practical 90-day plan
In the first 30 days, confirm the legal entities and reporting regimes in scope. Over the next 30 days, map available disclosures and data to CSDS 1, CSDS 2, existing securities obligations, and B-15 where applicable. In the final 30 days, prioritize gaps by deadline and evidence risk.
Start with reporting boundaries, Scope 1 and Scope 2 completeness, climate governance, and the link between climate risks and financial planning. Then develop Scope 3 and scenario-analysis capability on a controlled roadmap. If assurance is likely, use an ISSA 5000 readiness review before the first formal engagement.
Information in this article was verified on August 9, 2026. Requirements can change and may depend on an entity’s regulator and facts. This overview is general information, not legal advice.
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