01The concept in depthEl concepto a fondo
ESG reporting: from voluntary best practice to mandatory regulatory obligation›
ESG (Environmental, Social, Governance) reporting is the structured disclosure of a company’s non-financial performance to investors, regulators, customers, and other stakeholders. The ESG reporting landscape has shifted dramatically in 2023…2026 from voluntary best practice to mandatory regulatory obligation for large companies and their supply chain partners. Key drivers: EU Corporate Sustainability Reporting Directive (CSRD, 2024…2028 phased implementation), SEC Climate Disclosure Rules (US, 2025…2027), and Mexico BIVA Mercado Sostenible reporting requirements.
The 4 major ESG reporting frameworks and when each applies›
(1) GRI (Global Reporting Initiative): the most widely used ESG framework globally. GRI Standards cover environmental, social, and governance topics. GRI 3 (Material Topics, 2021) is the required starting point: the double materiality assessment that identifies which topics are material to the company (impact materiality + financial materiality). Used by: companies reporting voluntarily or under CSRD (which is GRI-aligned). (2) TCFD (Task Force on Climate-related Financial Disclosures): 4-pillar framework for climate risk disclosure (Governance, Strategy, Risk Management, Metrics & Targets). Mandatory for UK-listed companies; expected for multinationals globally. The climate risk section of CSRD is TCFD-aligned. (3) SASB (Sustainability Accounting Standards Board): industry-specific sustainability metrics for investor disclosure. Now merged with IFRS Sustainability Disclosure Standards (ISSB S1+S2). (4) Mexico BIVA Mercado Sostenible: the Mexican Stock Exchange ESG reporting framework. 80+ listed companies required to file ESG reports. Aligned with GRI and TCFD.
CSRD double materiality: the supply chain implication›
CSRD (Corporate Sustainability Reporting Directive) introduces double materiality: companies must assess and disclose both financial materiality (how sustainability topics affect company financial performance) AND impact materiality (how the company’s activities affect people and the environment). The supply chain implication: a Mexican manufacturer supplying to an EU-listed company may be required to provide sustainability data to its customer as part of the customer’s CSRD value chain disclosure. This creates a cascade of ESG data requests from EU-listed companies to their entire supply chain, regardless of the supplier’s size or location.
Intermediate vs. Advanced›
Intermediate: understands the key ESG frameworks and their applicability; can read and interpret ESG reports; provides sustainability data for customer ESG data requests.
Advanced: leads the ESG materiality assessment; manages the ESG reporting process (GRI, TCFD, BIVA); designs the value chain ESG data collection program; coordinates external verification.
Advanced: leads the ESG materiality assessment; manages the ESG reporting process (GRI, TCFD, BIVA); designs the value chain ESG data collection program; coordinates external verification.
ESG reporting: from voluntary best practice to mandatory regulatory obligation›
ESG (Environmental, Social, Governance) reporting is the structured disclosure of a company’s non-financial performance to investors, regulators, customers, and other stakeholders. The ESG reporting landscape has shifted dramatically in 2023…2026 from voluntary best practice to mandatory regulatory obligation for large companies and their supply chain partners. Key drivers: EU Corporate Sustainability Reporting Directive (CSRD, 2024…2028 phased implementation), SEC Climate Disclosure Rules (US, 2025…2027), and Mexico BIVA Mercado Sostenible reporting requirements.
The 4 major ESG reporting frameworks and when each applies›
(1) GRI (Global Reporting Initiative): the most widely used ESG framework globally. GRI Standards cover environmental, social, and governance topics. GRI 3 (Material Topics, 2021) is the required starting point: the double materiality assessment that identifies which topics are material to the company (impact materiality + financial materiality). Used by: companies reporting voluntarily or under CSRD (which is GRI-aligned). (2) TCFD (Task Force on Climate-related Financial Disclosures): 4-pillar framework for climate risk disclosure (Governance, Strategy, Risk Management, Metrics & Targets). Mandatory for UK-listed companies; expected for multinationals globally. The climate risk section of CSRD is TCFD-aligned. (3) SASB (Sustainability Accounting Standards Board): industry-specific sustainability metrics for investor disclosure. Now merged with IFRS Sustainability Disclosure Standards (ISSB S1+S2). (4) Mexico BIVA Mercado Sostenible: the Mexican Stock Exchange ESG reporting framework. 80+ listed companies required to file ESG reports. Aligned with GRI and TCFD.
CSRD double materiality: the supply chain implication›
CSRD (Corporate Sustainability Reporting Directive) introduces double materiality: companies must assess and disclose both financial materiality (how sustainability topics affect company financial performance) AND impact materiality (how the company’s activities affect people and the environment). The supply chain implication: a Mexican manufacturer supplying to an EU-listed company may be required to provide sustainability data to its customer as part of the customer’s CSRD value chain disclosure. This creates a cascade of ESG data requests from EU-listed companies to their entire supply chain, regardless of the supplier’s size or location.
Intermediate vs. Advanced›
Intermediate: understands the key ESG frameworks and their applicability; can read and interpret ESG reports; provides sustainability data for customer ESG data requests.
Advanced: leads the ESG materiality assessment; manages the ESG reporting process (GRI, TCFD, BIVA); designs the value chain ESG data collection program; coordinates external verification.
Advanced: leads the ESG materiality assessment; manages the ESG reporting process (GRI, TCFD, BIVA); designs the value chain ESG data collection program; coordinates external verification.
02In practiceEn la práctica
Start with the GRI 3 double materiality assessment before selecting any KPIs — it is the prerequisite for credible ESG reporting under GRI, CSRD, and IFRS S1/S2›
A company that selects ESG KPIs without a completed materiality assessment is reporting on what is easy to measure, not on what is important. Regulators, external verifiers, and investors will specifically look for evidence of a completed materiality process before accepting the report’s scope as credible.
Treat CSRD customer data requests as strategic customer relationship management, not as administrative burden›
EU-listed companies with CSRD obligations are required to collect Scope 3 Category 1 and Category 4 data from their supply chains. A supplier that proactively provides complete, verified ESG data creates customer stickiness; a supplier that consistently fails to respond creates pressure for supply chain rationalization.
Prepare for external verification at limited assurance level from the first ESG report — unverified sustainability claims are a greenwashing liability›
The EU CSRD mandates external verification for all CSRD-covered reports. Mexico’s BIVA Mercado Sostenible strongly encourages external verification. Even voluntary reporters face increasing scrutiny on unverified sustainability claims after the EU Anti-Greenwashing Directive (2024).
Build a single ESG data system rather than producing reports manually from spreadsheets — the annual report preparation cost is much lower with a structured data system›
Companies that manage ESG data in Excel spreadsheets typically spend 3–6 months of team time preparing the annual ESG report. Companies with a structured ESG data management platform (Persefoni, Workiva, Benchmark ESG) reduce report preparation time to 4–6 weeks.
Start with the GRI 3 double materiality assessment before selecting any KPIs — it is the prerequisite for credible ESG reporting under GRI, CSRD, and IFRS S1/S2›
A company that selects ESG KPIs without a completed materiality assessment is reporting on what is easy to measure, not on what is important. Regulators, external verifiers, and investors will specifically look for evidence of a completed materiality process before accepting the report’s scope as credible.
Treat CSRD customer data requests as strategic customer relationship management, not as administrative burden›
EU-listed companies with CSRD obligations are required to collect Scope 3 Category 1 and Category 4 data from their supply chains. A supplier that proactively provides complete, verified ESG data creates customer stickiness; a supplier that consistently fails to respond creates pressure for supply chain rationalization.
Prepare for external verification at limited assurance level from the first ESG report — unverified sustainability claims are a greenwashing liability›
The EU CSRD mandates external verification for all CSRD-covered reports. Mexico’s BIVA Mercado Sostenible strongly encourages external verification. Even voluntary reporters face increasing scrutiny on unverified sustainability claims after the EU Anti-Greenwashing Directive (2024).
Build a single ESG data system rather than producing reports manually from spreadsheets — the annual report preparation cost is much lower with a structured data system›
Companies that manage ESG data in Excel spreadsheets typically spend 3–6 months of team time preparing the annual ESG report. Companies with a structured ESG data management platform (Persefoni, Workiva, Benchmark ESG) reduce report preparation time to 4–6 weeks.
03Illustrative caseCaso ilustrativo
Illustrative case built from typical industry values — not data from a specific company.Caso ilustrativo construido con valores típicos de la industria — no son datos de una empresa específica.
Illustrative case: ESG reporting program — Mexican manufacturer with EU clients, first GRI-aligned report
The company implements its first formal ESG reporting program to comply with customer CSRD data requests and prepare for potential BIVA listing requirements.
The company implements its first formal ESG reporting program to comply with customer CSRD data requests and prepare for potential BIVA listing requirements.
| ESG reporting milestone | Approach & finding | Outcome |
|---|---|---|
| GRI 3 double materiality assessment: which ESG topics are material for the company? | Workshop with 40 internal and external stakeholders (customers, employees, suppliers, community) · 18 ESG topics evaluated on impact and financial materiality scale | Top 5 material topics: GHG emissions (Scope 3), water use in manufacturing, supplier labor conditions, packaging waste, and product quality safety · Non-material topics excluded from reporting scope |
| CSRD value chain data request from EU key account (30% of revenue): what data is required? | Customer requests Scope 3 Category 1 PCF data, social audit results for all Tier-1 suppliers, and water consumption per tonne of product | PCF data available for 40% of product categories · Social audit program covers 65% of Tier-1 suppliers · Water intensity metric implemented · 12-month plan to close remaining gaps |
| First GRI-aligned ESG report: key performance disclosures | GRI 305 (Emissions): total Scope 1+2+3 footprint · GRI 303 (Water): water withdrawal by source · GRI 308 (Supplier Environmental Assessment): % suppliers screened | First ESG report published for FY2024 · Report externally verified at limited assurance level · BIVA Mercado Sostenible filing completed · 3 EU client requests fully satisfied with report data |
Result: First GRI-aligned ESG report required 8 months of preparation, 2 FTE of dedicated sustainability team time, and €45K in external limited assurance fees. The report satisfied all 3 EU client CSRD data requests and enabled the company to qualify for a sustainability-linked supply chain financing facility at 0.4 pp lower interest rate than standard financing.
Illustrative case built from typical industry values — not data from a specific company.Caso ilustrativo construido con valores típicos de la industria — no son datos de una empresa específica.
Case: ESG reporting program — Mexican manufacturer with EU clients, first GRI-aligned report
The company implements its first formal ESG reporting program to comply with customer CSRD data requests and prepare for potential BIVA listing requirements.
The company implements its first formal ESG reporting program to comply with customer CSRD data requests and prepare for potential BIVA listing requirements.
| ESG reporting milestone | Approach & finding | Outcome |
|---|---|---|
| GRI 3 double materiality assessment: which ESG topics are material for the company? | Workshop with 40 internal and external stakeholders (customers, employees, suppliers, community) · 18 ESG topics evaluated on impact and financial materiality scale | Top 5 material topics: GHG emissions (Scope 3), water use in manufacturing, supplier labor conditions, packaging waste, and product quality safety · Non-material topics excluded from reporting scope |
| CSRD value chain data request from EU key account (30% of revenue): what data is required? | Customer requests Scope 3 Category 1 PCF data, social audit results for all Tier-1 suppliers, and water consumption per tonne of product | PCF data available for 40% of product categories · Social audit program covers 65% of Tier-1 suppliers · Water intensity metric implemented · 12-month plan to close remaining gaps |
| First GRI-aligned ESG report: key performance disclosures | GRI 305 (Emissions): total Scope 1+2+3 footprint · GRI 303 (Water): water withdrawal by source · GRI 308 (Supplier Environmental Assessment): % suppliers screened | First ESG report published for FY2024 · Report externally verified at limited assurance level · BIVA Mercado Sostenible filing completed · 3 EU client requests fully satisfied with report data |
Result: First GRI-aligned ESG report required 8 months of preparation, 2 FTE of dedicated sustainability team time, and €45K in external limited assurance fees. The report satisfied all 3 EU client CSRD data requests and enabled the company to qualify for a sustainability-linked supply chain financing facility at 0.4 pp lower interest rate than standard financing.
04How it is measuredCómo se mide
ESG Report Materiality Coverage % (% of identified material topics with quantitative KPIs and targets in the ESG report)›
ESG Report Materiality Coverage % (% of identified material topics with quantitative KPIs and targets in the ESG report)
(GRI 3 material topics with at least one quantitative KPI and a reduction/improvement target in the ESG report / Total identified material topics) × 100
Benchmark: >80% materiality coverage for mature ESG reporting programs · A report that discloses all material topics without quantitative targets does not meet GRI or CSRD disclosure standards
⚠️ An ESG report that lists 12 material topics but provides quantitative data and targets for only 4 of them has a 33% materiality coverage rate. This gap will be specifically flagged by the external verifier and by investors using standardized ESG data platforms like MSCI or Sustainalytics.
CSRD Value Chain Data Request Response Rate % (% of customer ESG data requests fulfilled within the requested timeframe)›
CSRD Value Chain Data Request Response Rate % (% of customer ESG data requests fulfilled within the requested timeframe)
(Customer CSRD/ESG data requests fulfilled with complete, verified data within the requested timeframe / Total customer ESG data requests received) × 100
Benchmark: >90% response rate for suppliers with mature ESG data programs
🔑 A 50% CSRD data request response rate means the company is failing to meet its legal obligations to EU-reporting customers. Under CSRD, EU-listed companies that cannot collect value chain data may face audit qualifications or regulatory penalties. Suppliers who consistently fail to respond risk customer qualification review.
ESG Report Materiality Coverage % (% of identified material topics with quantitative KPIs and targets in the ESG report)›
ESG Report Materiality Coverage % (% of identified material topics with quantitative KPIs and targets in the ESG report)
(GRI 3 material topics with at least one quantitative KPI and a reduction/improvement target in the ESG report / Total identified material topics) × 100
Benchmark: >80% materiality coverage for mature ESG reporting programs · A report that discloses all material topics without quantitative targets does not meet GRI or CSRD disclosure standards
⚠️ An ESG report that lists 12 material topics but provides quantitative data and targets for only 4 of them has a 33% materiality coverage rate. This gap will be specifically flagged by the external verifier and by investors using standardized ESG data platforms like MSCI or Sustainalytics.
CSRD Value Chain Data Request Response Rate % (% of customer ESG data requests fulfilled within the requested timeframe)›
CSRD Value Chain Data Request Response Rate % (% of customer ESG data requests fulfilled within the requested timeframe)
(Customer CSRD/ESG data requests fulfilled with complete, verified data within the requested timeframe / Total customer ESG data requests received) × 100
Benchmark: >90% response rate for suppliers with mature ESG data programs
🔑 A 50% CSRD data request response rate means the company is failing to meet its legal obligations to EU-reporting customers. Under CSRD, EU-listed companies that cannot collect value chain data may face audit qualifications or regulatory penalties. Suppliers who consistently fail to respond risk customer qualification review.
05What you would useQué se usa
📌 ESG Reporting Platforms
Workiva / Benchmark ESG (Diligent) / Enablon›
Module: ESG Reporting & Disclosure Management Platform
Workiva, Benchmark ESG, and Enablon are the reference platforms for structured ESG data management, report generation, and external verification workflow — supporting GRI, TCFD, SASB/ISSB, and CSRD reporting requirements.
Workiva, Benchmark ESG, and Enablon are the reference platforms for structured ESG data management, report generation, and external verification workflow — supporting GRI, TCFD, SASB/ISSB, and CSRD reporting requirements.
GRI Standards (globalreporting.org) / CSRD / ISSB S1+S2›
Module: ESG Regulatory Frameworks
The GRI Standards (full suite), EU CSRD text, and IFRS ISSB S1 (General Sustainability Disclosures) and S2 (Climate) are the primary regulatory texts that define mandatory and voluntary ESG disclosure obligations. Available free from their respective issuing organizations.
The GRI Standards (full suite), EU CSRD text, and IFRS ISSB S1 (General Sustainability Disclosures) and S2 (Climate) are the primary regulatory texts that define mandatory and voluntary ESG disclosure obligations. Available free from their respective issuing organizations.
📌 ESG Reporting Platforms
Workiva / Benchmark ESG (Diligent) / Enablon›
Module: ESG Reporting & Disclosure Management Platform
Workiva, Benchmark ESG, and Enablon are the reference platforms for structured ESG data management, report generation, and external verification workflow — supporting GRI, TCFD, SASB/ISSB, and CSRD reporting requirements.
Workiva, Benchmark ESG, and Enablon are the reference platforms for structured ESG data management, report generation, and external verification workflow — supporting GRI, TCFD, SASB/ISSB, and CSRD reporting requirements.
GRI Standards (globalreporting.org) / CSRD / ISSB S1+S2›
Module: ESG Regulatory Frameworks
The GRI Standards (full suite), EU CSRD text, and IFRS ISSB S1 (General Sustainability Disclosures) and S2 (Climate) are the primary regulatory texts that define mandatory and voluntary ESG disclosure obligations. Available free from their respective issuing organizations.
The GRI Standards (full suite), EU CSRD text, and IFRS ISSB S1 (General Sustainability Disclosures) and S2 (Climate) are the primary regulatory texts that define mandatory and voluntary ESG disclosure obligations. Available free from their respective issuing organizations.
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