IFRS S1 for Telecommunications in Mexico: 2026 Guide
IFRS S1 establishes general requirements for BMV and BIVA-listed issuers to disclose material information about sustainability-related risks and opportunities in their annual reports. CNBV made it mandatory starting January 2025, with the first report covering FY2025 data due in 2026. IFRS S1 acts as the umbrella standard that complements IFRS S2 on climate-specific matters.
Telecommunications is a Scope 2-intensive sector (data centers, antennas) where renewable energy procurement (CEL or VPPA with IEnova/Zuma) is the primary decarbonization lever. IFRS S2 requires reporting the data center decarbonization plan — a topic that América Móvil and Axtel's CTO and Sustainability Directors are already evaluating under pressure from investors like BlackRock and Vanguard.
Why IFRS S1 Applies Differently in Telecommunications
Sustainability Director and CTO of telecom operators listed on BMV with data and voice networks required to report IFRS S1/S2 to CNBV
Thousands of remote antenna sites with diesel generators: Scope 1 from generator fleet in off-grid zones is the hardest to measure — fuel loading logs are manual and dispersed
Data center Scope 2: América Móvil and Axtel operate data centers PUE 1.6-2.0 with CFE off-peak energy contracts — market-based methodology requires renewable energy contracts (VPPA or CEL) not all yet have
IFRS S1 physical risk: critical infrastructure in hurricane zones (Caribbean, Gulf) with resilience analysis of towers and CEOS under winds >250 km/h under RCP 8.5 by 2050
Scope 3 category 11: use of sold or subsidized smartphones and devices generates emissions in use (daily charging) and end-of-life (WEEE) that the operator must estimate
Critical IFRS S1 KPIs for Telecommunications
| Required KPI | Data Source | Difficulty |
|---|---|---|
| Carbon intensity: tCO₂e per petabyte of data transmitted or per active subscriber | Purchased electricity (Scope 2) | High 🔴 |
| Weighted average PUE of own data centers (sector target: PUE <1.5) | Electricity bills (Scope 2) | High 🔴 |
| Percentage of antenna sites with renewable energy (solar + battery) vs. diesel | Cat 1 - Equipos de red (routers, antenas, servidores) fabricados en Asia | High 🔴 |
| Tonnes of WEEE collected in return programs and percentage with certified recycling | HR / payroll system | Medium 🟡 |
| Network energy intensity: kWh per GB of data traffic transmitted | ERP / accounting system | Medium 🟡 |
Hard-to-Collect Data in Telecommunications
Diesel consumption in backup generators (UPS + gensets) at remote antenna sites without telemetry: only available in physical logbooks from field contractors
PUE (Power Usage Effectiveness) of smaller data centers (<1 MW) operated in shared or leased facilities where the energy meter belongs to the landlord
Tonnes of WEEE (waste electrical and electronic equipment) generated from end-user equipment returns and final destination (certified recycling vs. informal disposal)
That is why manual Excel-based processes will not pass the 2027 assurance. Without automated traceability, an external auditor cannot verify the completeness or accuracy of emissions data.
Checklist: 8 Steps to Comply with IFRS S1 in Telecommunications
- 1
Identification and disclosure of all sustainability-related risks and opportunities material to the enterprise
- 2
Description of board and management oversight of sustainability risks
- 3
Scenario analysis to assess strategy resilience under different sustainability futures
- 4
Description of processes for identifying, assessing, and managing sustainability risks integrated into corporate governance
- 5
Disclosure of metrics and targets used to manage and monitor material risks and opportunities
- 6
Connect data sources (ERP, meters, suppliers) to a centralized platform
- 7
Review with internal audit team and adjust consolidation perimeter
- 8
Generate report in CNBV/CINIF format ready for external assurance
How Climatta Automates IFRS S1 for Telecommunications
Automated Collection
Eliminate spreadsheets in Telecommunications. Climatta connects your systems and automatically collects Carbon intensity: tCO₂e per petabyte of data transmitted or per active subscriber and other critical KPIs.
Auditor-Grade Traceability
Every data point has source, date, and owner documented. The 2027 assurance auditor can trace every figure to its origin in your systems.
IFRS S1 Report Ready
Generates the report in the exact CNBV format — tables, metrics, and narrative. No last-minute manual reformatting.
Onboarding in 4 Weeks
Climatta connects to Telecommunications systems in 4 weeks. No months-long IT project or external implementation consultant.
FAQ: IFRS S1 in Telecommunications
Ready to comply with IFRS S1 in Telecommunications?
Climatta centralizes all data collection, generates the report in regulatory format, and leaves it ready for 2027 external assurance. No spreadsheets.