IFRS S2 for Retail & Commerce with Excel / Proceso Manual: Data Integration 2026
IFRS S2 is the climate-specific standard adopted by CNBV as mandatory for all BMV and BIVA issuers starting January 2025, making Mexico the first country in North America to implement IASB's ISSB standards. Companies must report GHG emissions across all three scopes, conduct climate scenario analysis, and disclose how climate change impacts their strategy and financial model. Limited assurance of the report by an external auditor will be required starting with the 2027 reporting cycle.
Excel is the 'de facto ERP' for sustainability in most Mexican companies — even those with SAP or Oracle use Excel to compile ESG data across departments. The fundamental problem for 2027 assurance is that Excel has no chain of custody: any cell can be modified without a record, emission factor calculations are not auditable, and manual consolidation across plants and periods introduces systematic errors. Climatta resolves this with a structured upload process from validated Excel templates, automatically creating the audit trail the assurer needs: who captured each data point, when, from what source, and whether it was modified.
Data Already in Your Excel / Proceso Manual
Your Excel / Proceso Manual already has most of the data IFRS S2 requires. Climatta extracts it automatically without manual work.
| IFRS S2 Requirement | Excel / Proceso Manual Module | Available |
|---|---|---|
| Reporting of GHG emissions Scope 1, 2, and 3 (full value chain) in metric tons of CO₂ equivalent | Hojas de cálculo Excel | ✅ |
| Climate scenario analysis aligned to TCFD using at least 1.5°C and 2°C as reference pathways | Correo electrónico | ✅ |
| Identification and quantification of physical risks (chronic and acute) and transition risks | Formatos PDF | ✅ |
| Disclosure of emissions reduction targets, including net-zero goals with interim milestones | Reportes manuales | ⚠️ |
| Description of how climate risks and opportunities affect business model, strategy, and cash flows | Google Sheets | ⚠️ |
Electricity and gas invoices in PDF — data available but scattered across emails and folders with no structure
Fleet fuel records in ad-hoc formats by driver — fragmented, with no auditable chain of custody
Waste reports from environmental vendors in paper or PDF — not integrated into the sustainability reporting process
Payroll and HR in proprietary spreadsheets — social indicators calculable but with manual error risk and no version control
Why Excel from Excel / Proceso Manual Will Not Pass the 2027 Assurance
No audit trail: the auditor cannot trace the data back to its source in Excel / Proceso Manual
Formula error risk: one miscalculated cell invalidates the entire report
No change history: impossible to demonstrate data integrity over time
Excel / Proceso Manual → Excel → report = 3 manual transformations with no governance control
How Climatta Connects with Excel / Proceso Manual
Excel is the 'de facto ERP' for sustainability in most Mexican companies — even those with SAP or Oracle use Excel to compile ESG data across departments. The fundamental problem for 2027 assurance is that Excel has no chain of custody: any cell can be modified without a record, emission factor calculations are not auditable, and manual consolidation across plants and periods introduces systematic errors. Climatta resolves this with a structured upload process from validated Excel templates, automatically creating the audit trail the assurer needs: who captured each data point, when, from what source, and whether it was modified.
Secure connection to Excel / Proceso Manual
Climatta connects to Excel / Proceso Manual via API or certified connector, installing nothing on your server.
Automatic module mapping
Modules Hojas de cálculo Excel and Correo electrónico are automatically mapped to IFRS S2 indicators, with no manual configuration.
Report ready for assurance
Complete report in CNBV/CINIF format with traceability of every data point back to Excel / Proceso Manual. The auditor has the evidence they need.
4 benefits of connecting Excel / Proceso Manual with Climatta
Time
From weeks to hours in IFRS S2 data collection from Excel / Proceso Manual
Risk
Full traceability: every data point audited back to its source in Excel / Proceso Manual
Auditability
Immutable change history — the 2027 auditor approves it
Cost
No integration consultancy needed: Climatta connects to Excel / Proceso Manual in 2 weeks
FAQ — Excel / Proceso Manual + IFRS S2
We connect with your Excel / Proceso Manual in 2 weeks. No manual integration.
Over 50 Retail & Commerce companies already report IFRS S2 automatically with Climatta.