Canada's approach to climate disclosure is shifting from voluntary guidelines to mandatory requirements, with the Canadian Sustainability Standards Board (CSSB) releasing final standards CSDS 1 and CSDS 2 on December 18, 2024.
The New Standards
These standards, which became available for voluntary adoption on January 1, 2025, align closely with international ISSB requirements while providing crucial Canadian-specific accommodations. The most significant difference lies in Canada's more gradual implementation approach, offering a three-year transition relief for Scope 3 emissions disclosure compared to the ISSB's more aggressive one-year timeline. This recognition of Canadian market realities provides companies with additional time to develop the sophisticated data collection systems required for comprehensive supply chain emissions reporting.
The standards establish a comprehensive framework for climate-related financial disclosures that touches every aspect of corporate governance and operations. Companies must now articulate how their boards oversee climate risks, demonstrating that climate considerations have moved from the sustainability department to the boardroom. They must explain how climate impacts their business models and strategy, moving beyond generic risk statements to specific analysis of physical and transition risks. The standards also require detailed documentation of risk management processes for identifying and addressing climate risks, along with quantitative metrics and targets that allow investors to assess progress over time.
Multi-Level Regulatory Approach
The Canadian Securities Administrators are developing mandatory climate disclosure rules under proposed National Instrument 51-107, taking what they call a "climate-first approach." This pragmatic strategy recognizes that while investors increasingly demand consistent and comparable climate disclosure, many issuers are still building their capacity to provide sophisticated climate reporting. The approach aims to strike a balance between market demands and issuer readiness.
Adding another layer to the regulatory landscape, the federal government announced on October 9, 2024, that large federally incorporated private companies will face mandatory climate disclosure requirements under the Canada Business Corporations Act. This expansion beyond public markets represents a recognition that climate risks affect the entire economy, not just publicly traded companies. By capturing significant private sector emissions, the framework ensures that major economic actors cannot avoid climate accountability simply by remaining private.
Provincial Variations
The implementation of climate disclosure requirements across Canada's provinces reveals the complexity of our federal system and the diverse perspectives on regulatory burden. Ontario has emphasized the need for "right-sized" requirements that recognize the varying capabilities of different issuer categories. The province's approach acknowledges that a mining exploration company faces different climate risks and reporting capabilities than a major bank, and regulations should reflect these differences.
Alberta has raised legitimate concerns about the burden on smaller reporting issuers, particularly in the energy sector where companies may face significant transition risks but lack the resources for sophisticated climate reporting. The province advocates for proportional requirements that don't overwhelm smaller companies while still providing meaningful disclosure.
The Office of the Superintendent of Financial Institutions updated Guideline B-15 in March 2025, requiring federally regulated financial institutions to meet enhanced disclosure standards by fiscal year-end 2025. This accelerated timeline for financial institutions reflects their systemic importance and their dual role as both reporters of their own climate risks and assessors of climate risks in their lending and investment portfolios.
Implementation Timeline
Companies face a carefully sequenced implementation timeline that provides opportunities for learning and improvement. Throughout 2025, companies can voluntarily adopt CSSB standards, gaining valuable experience with climate reporting before mandatory requirements take effect. This voluntary period serves as a crucial testing ground for reporting systems and processes.
During 2025 and 2026, regulators will develop the detailed mandatory requirements, incorporating lessons learned from early adopters and international best practices. The expected implementation of mandatory disclosure in 2026-2027 will mark the beginning of a new era in Canadian corporate reporting, where climate considerations become as fundamental as financial performance.
Practical Steps for Compliance
Smart companies are already taking concrete steps to prepare for mandatory climate disclosure. The first priority involves establishing comprehensive data collection systems for emissions across all scopes. This means not just measuring direct emissions from operations (Scope 1) and purchased electricity (Scope 2), but also beginning the complex process of understanding value chain emissions (Scope 3). Even companies operating under voluntary standards should begin this data gathering now, as building reliable emissions inventories takes time and often reveals unexpected challenges.
Governance structures require careful attention to ensure appropriate board oversight of climate risks. This goes beyond adding climate to the board agenda periodically; it requires building board competency in climate matters, establishing clear oversight responsibilities, and integrating climate considerations into strategic decision-making. Companies must also develop robust reporting systems that can consistently collect and verify climate data across operations, ensuring the same rigor applied to financial reporting extends to climate disclosure.
Early adoption of voluntary standards offers multiple advantages. It demonstrates leadership to investors increasingly focused on climate risks, provides valuable learning opportunities before mandatory compliance, and allows companies to influence the development of final regulations through their practical experience.
The Business Case
While regulatory compliance drives much of the current focus on climate disclosure, forward-thinking companies recognize the broader business benefits. Enhanced climate disclosure builds investor confidence by demonstrating that management understands and is actively managing climate risks. This transparency increasingly influences access to capital, with many institutional investors now requiring robust climate disclosure as a prerequisite for investment.
The process of preparing climate disclosures often reveals opportunities for better risk management and improved operational efficiency. Companies frequently discover energy savings, supply chain improvements, and innovation opportunities through the systematic analysis required for climate reporting. In markets increasingly focused on ESG performance, strong climate disclosure provides competitive advantages in attracting customers, employees, and business partners who prioritize sustainability.
How I Can Help
As climate disclosure requirements evolve from voluntary guidelines to mandatory obligations, companies need experienced legal counsel to navigate this complex transition. I assist clients in understanding their disclosure obligations under both current voluntary standards and anticipated mandatory requirements. I help develop governance frameworks that ensure appropriate board oversight, work with management teams to identify material climate risks, and craft disclosure that meets regulatory requirements while telling your company's climate story effectively.
My expertise spans various industries and company sizes, from helping large emitters prepare for comprehensive Scope 3 reporting to assisting smaller issuers in developing proportional disclosure approaches. I also advise boards on their oversight responsibilities and help companies prepare for the increased scrutiny that comes with mandatory climate disclosure.
For guidance on developing your climate disclosure strategy or understanding how these requirements affect your organization, please contact:
Taylor M.A. Dignan
Email: td@tmadlaw.com
Phone: 604-928-1164
Office: 1 Dundas St. W., Suite 2500, Toronto, Ontario M5G 1Z3