IFRS S2 + NIS B-1 for Infrastructure in Mexico: 2026 Guide
BMV and BIVA issuers face the unique challenge of simultaneously complying with IFRS S2 (CNBV) and NIS B-1 (CINIF) for the same fiscal year, implying two regulatory frameworks, two regulators, and potentially two external assurance processes. Without a centralized platform, companies end up with sustainability and finance teams operating in silos, collecting redundant data in non-auditable spreadsheets. The overlap between IBSO indicators and IFRS S2 metrics is significant but not total, requiring precise mapping.
Infrastructure concessionaires face the longest-term physical climate risk among BMV issuers — their assets have a 30-50 year horizon and are exposed to intensification of extreme events (hurricanes, floods, droughts). IFRS S2 requires 1.5°C/2°C/4°C scenario analysis for infrastructure assets, including adaptation and resilience costs that PINFRA and OHL must incorporate in their disclosed business plans.
Why IFRS S2 + NIS B-1 Applies Differently in Infrastructure
CFO and Sustainability Director of BMV-listed infrastructure concessionaires (roads, bridges, tunnels)
Vehicle emissions on toll highways (Scope 3 Cat 13 — use of leased/concession assets) — calculation method based on vehicle count and fuel mix that varies by corridor
Diesel consumption in construction and maintenance machinery distributed across 50+ simultaneous work fronts without sub-metering per project
Physical climate risks in long-term assets (50-year concession) — climate scenario analysis for critical infrastructure required by IFRS S2
Emissions from civil construction subcontractors (Scope 3 Cat 1 and Cat 2) — >60% of work executed by third parties without emissions data
Critical IFRS S2 + NIS B-1 KPIs for Infrastructure
| Required KPI | Data Source | Difficulty |
|---|---|---|
| tCO2e per km of managed highway | Direct combustion (Scope 1) | High 🔴 |
| Diesel consumption in maintenance per km (liters/km/year) | Electricity bills (Scope 2) | High 🔴 |
| Percentage of projects with subcontractors reporting emissions (%) | Cat 13 - Vehículos en autopistas concesionadas | High 🔴 |
| Environmental incidents in construction zones (# per year) | HR / payroll system | Medium 🟡 |
| Energy intensity at toll booths and equipment (kWh/vehicle-equivalent) | ERP / accounting system | Medium 🟡 |
Hard-to-Collect Data in Infrastructure
Vehicle emissions by type (trucks, cars, motorcycles) at toll booths — requires emission factor per vehicle category and differentiated count
Diesel consumption of subcontractors at remote work fronts without standardized timesheets
Land use change data for biodiversity analysis in rights-of-way
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 S2 + NIS B-1 in Infrastructure
- 1
Mapping and reconciliation of all 30 IBSO indicators with IFRS S2 metrics requirements to avoid duplication of effort
- 2
Unified GHG emissions data collection for Scope 1, 2, and 3 serving both frameworks simultaneously without double measurement
- 3
Management of two distinct assurance processes: CNBV's limited assurance under IFRS S2 and CINIF's review under NIS B-1, ideally with the same auditor
- 4
Alignment of reporting calendars — the integrated sustainability report must meet both deadlines from a single data collection cycle
- 5
Implementation of robust internal controls over sustainability information capable of supporting third-party assurance under both frameworks from 2027
- 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 S2 + NIS B-1 for Infrastructure
Automated Collection
Eliminate spreadsheets in Infrastructure. Climatta connects your systems and automatically collects tCO2e per km of managed highway 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 S2 + NIS B-1 Report Ready
Generates the report in the exact CNBV + CINIF format — tables, metrics, and narrative. No last-minute manual reformatting.
Onboarding in 4 Weeks
Climatta connects to Infrastructure systems in 4 weeks. No months-long IT project or external implementation consultant.
FAQ: IFRS S2 + NIS B-1 in Infrastructure
Ready to comply with IFRS S2 + NIS B-1 in Infrastructure?
Climatta centralizes all data collection, generates the report in regulatory format, and leaves it ready for 2027 external assurance. No spreadsheets.