Which sustainability reporting framework is right for your company?

Sustainability disclosure is being driven from every direction — mandatory regulations like the EU's Corporate Sustainability Reporting Directive (CSRD), state-level legislation like California's SB 261, investor expectations, and the competitive reality that many companies are already reporting. Underneath all of it is a reputational truth: in an era of heightened greenwashing scrutiny, transparent reporting is how companies can back up what they are saying.

Nearly every S&P 500 company now publishes some form of ESG report, according to the Center for Audit Quality, but companies starting out often feel paralyzed by the "alphabet soup" of frameworks: GRI, SASB, ISSB, TCFD, and more. The good news is that these frameworks build on each other. The key is knowing where to start and who your primary audience is. Here's how to choose the one that matches where your company is going, not just where it is today.

Starting points: GRI and SASB

These two voluntary frameworks are the natural entry point for companies beginning their sustainability disclosure journey. They introduce diligence and comparability without the prescriptive legal requirements of regulatory standards.

Global Reporting Initiative (GRI) is the oldest and most widely used sustainability reporting standard globally, according to IBM. It centers on impact materiality — reporting how your operations affect the world (employees, communities, environment) rather than how sustainability affects your financials. It covers the broadest range of ESG topics of any major framework, and it's formally interoperable with European Sustainability Reporting Standards (ESRS), making it a practical building block toward EU compliance.

Best for: Mission-driven brands whose primary audience is customers, employees, and community — and for companies supplying large enterprise clients with EU exposure, since GRI's alignment with ESRS gives you a head start on what those clients are legally required to report.

Sustainability Accounting Standards Board (SASB) identifies the sustainability topics most likely to affect a company's financial performance, with industry-specific metrics across 77 industries. There's no formal materiality assessment required since companies identify their industry and report against the relevant metrics. SASB standards are now maintained by the IFRS Foundation, which help companies report industry-specific information to investors globally.

Best for: Companies preparing for a funding round or IPO, where investors need standardized, industry-relevant data to assess risk. Mission-led companies can benefit from SASB when engaging investors who want financially material data alongside impact storytelling.

From reporting to risk management: Frameworks that integrate with financial and regulatory systems

The frameworks below take sustainability reporting a step further, embedding it into financial reporting and risk management. They are best suited for companies aligning sustainability with enterprise value, preparing for assurance, or responding to regulatory requirements.

TCFD (Task Force on Climate-related Financial Disclosures) established the governance and risk architecture that now underpins modern climate disclosure. It’s built around four pillars: governance, strategy, risk management, and metrics and targets. While TCFD as a standalone body has been disbanded, its recommendations have been fully integrated into IFRS S2. TCFD and IFRS S2 are the basis for California's SB 261, which requires climate risk reporting for large companies doing business in the state. For companies just starting out, there is little reason to begin with TCFD directly; going straight to IFRS S2 is the more practical and future-proof path.

Best for: Understanding the architecture behind modern climate disclosure standards.

IFRS S1 & S2 (International Sustainability Standards Board Standards) are the emerging global baseline for investor-focused sustainability disclosure. S1 covers general sustainability-related risks and opportunities affecting enterprise value; S2 is climate-specific and built directly on TCFD. If you've already adopted SASB and your company hasn’t disclosed climate risks and opportunities yet, moving to IFRS S2 is a natural starting point.

ESRS (European Sustainability Reporting Standards) is the mandatory EU disclosure framework under CSRD. It requires a double materiality assessment, which assesses how sustainability issues affect your business financially, and how your business affects people and the planet. It is the most comprehensive of all major frameworks, requiring third-party assurance. ESRS is formally interoperable with both GRI (impact side) and IFRS (financial side). A voluntary SME standard (VSME) is being updated for smaller companies not directly subject to CSRD but being asked for disclosure from larger clients.

Best for: Companies subject to CSRD, as well as those operating in the EU that might look to leverage ESRS or adopt the voluntary standards.

Where to begin

Starting your sustainability reporting journey doesn’t mean your team has to tackle everything at once. As you decide which framework works best for your company’s size and scope, keep your audience in mind — investors, customers, regulators or employees? This should shape the framework you prioritize.

Disclosure is a cross-functional effort, and clarity on ownership is half the battle since no single department holds all the answers. The process forces companies to clarify internally who owns what, what they're actually measuring, and why it matters. Underpinning all of this is materiality, which serves as the starting point for most disclosure frameworks. Before a company can determine what to disclose, it must first identify what is significant to its business and stakeholders.

Most frameworks require companies to conduct this assessment themselves, though SASB simplifies the process by pre-determining material topics by industry, giving companies a ready-made baseline to work from. What a company ultimately discloses flows directly from what it has determined to be material, making it one of the most consequential steps in the entire process.

Most importantly, companies should choose the framework that matches where they want to be in three years, not where they are today. The frameworks above build on each other deliberately, and a first step in the right direction is far more valuable than waiting for the perfect moment to begin.

Need help getting started? We develop strategic compliance roadmaps and double materiality assessments that prioritize requirements and establish timelines. Let’s talk.