What IFRS S1 and S2 mean for Nigerian organizations

Sustainability reporting in Nigeria is entering a different phase — and the question boards are asking is changing with it.

For years, sustainability information in Nigeria mostly lived in CSR reports, ESG pages on a website, or a standalone sustainability publication released once a year. That's changing. The question organizations are now being asked is more financial in nature: how do sustainability and climate-related issues affect the organization's ability to create value, generate cash flow, access finance, and manage risk?

That's the thinking behind the International Sustainability Standards Board's IFRS S1 and IFRS S2, and Nigeria has already mapped out how it plans to adopt them. Under the Financial Reporting Council's amended 2026 roadmap, voluntary adoption has been open since 2024, with mandatory adoption arriving for Public Interest Entities from periods beginning on or after 1 January 2028, and for SMEs from 1 January 2030. Early adoption is encouraged.

Which means the useful question for most organizations isn't "do we need a sustainability report?" anymore. It's whether they have the systems, governance, data and processes in place to produce sustainability-related financial information that will actually hold up.

What the two standards actually cover

IFRS S1 is the broader standard. It requires an organization to disclose material sustainability-related risks and opportunities — anything that could reasonably be expected to affect cash flows, access to finance, or cost of capital over the short, medium or long term. In practice that reaches well beyond climate: water availability, workforce and human capital, supply-chain disruption, health and safety, community relations, regulatory change, governance, biodiversity, energy security. The standard isn't asking an organization to report everything it does under a sustainability banner — it's asking it to identify what's actually material to the decisions investors and lenders make.

IFRS S2 narrows in on climate specifically, covering both physical risks (flooding, extreme heat, drought, disrupted rainfall patterns) and transition risks (regulatory change, shifting energy systems, evolving customer expectations). It also asks for governance, strategy, risk management, metrics and targets, along with greenhouse-gas emissions and industry-specific climate information.

What this actually means day to day

This is where the standards get more interesting — and more demanding. You can't hand a template to the sustainability team and ask them to "prepare the ESG report." The information IFRS S1 and S2 require cuts across the organization.

The Board needs to understand sustainability risk

Sustainability is becoming a governance question, not a communications one. Boards need to be able to answer what sustainability and climate risks could materially affect the business, who owns managing them, how they feed into enterprise risk management, what reaches the Board table, and how performance against targets is actually monitored. Nigeria's roadmap is explicit about governance, risk management, metrics and targets forming part of the disclosure — which means sustainability can no longer sit off to the side in a CSR function. It has to connect to governance and enterprise risk management directly.

Finance and sustainability need to actually work together

This might be the biggest shift of all. A lot of sustainability reporting has historically leaned on activity — trees planted, employees trained, communities supported. Useful, but not what IFRS S1 and S2 are asking. The question is what sustainability-related risks and opportunities could affect the organization's financial prospects.

A manufacturer in an area with unreliable power may be facing rising diesel costs. A food business dependent on agricultural inputs may be exposed to supply disruption from shifting rainfall. An oil and gas company is navigating regulatory and market change tied to the energy transition. A bank carries climate-related credit risk through what it finances. None of these are just ESG stories anymore — they're business and risk-management issues, and Finance needs to be in the room for them.

Climate data becomes a real operational challenge

IFRS S2 requires greenhouse-gas data — Scope 1 and 2 at minimum, Scope 3 where relevant — and Nigeria's roadmap points to the GHG Protocol as the basis for calculating it. That raises some unglamorous but essential questions: where does the emissions data actually come from? How much fuel did the generators burn? How much electricity was purchased? Who owns that number, how often is it collected, and can it be reproduced by someone else next year? A spreadsheet assembled two weeks before the annual report isn't going to hold up. What's needed is a repeatable system.

Supply chains enter the conversation

For a lot of Nigerian businesses, the more significant sustainability risks sit outside their own four walls — in imported raw materials, energy-intensive suppliers, road transport, agricultural inputs, packaging, waste contractors. Climate or sustainability disruption anywhere along that chain eventually shows up in the company's own numbers, which is part of why Scope 3 and value-chain data tend to be the hardest part of this exercise. Better to start engaging suppliers now than to wait until disclosure is mandatory and discover the data doesn't exist.

Risk management has to evolve to hold this

IFRS S1 expects a process for identifying, assessing, prioritizing and monitoring sustainability-related risks, integrated into the organization's broader risk framework — not sitting apart from it. For HSE and risk professionals specifically, that's significant: climate, environmental impact, occupational safety, resource constraints and regulatory change shouldn't automatically live in separate silos. Where they're material, they need a path into the same architecture — risk registers, assessments, controls, KPIs, management review, Board reporting.

Scenario thinking, even in early form

Climate risk isn't only about what already happened — it's about what could happen under different conditions. What if temperatures rise significantly? What if extreme rainfall becomes more frequent? What if carbon regulation tightens, or customers shift toward lower-carbon products, or an organization's energy costs jump? Nigeria's roadmap recognizes this and allows organizations to start with qualitative scenario analysis before building toward quantitative models as capability matures.

Reporting moves closer to the financial statements

Under Nigeria's framework, sustainability-related financial disclosures are expected to sit within general-purpose financial reporting — positioned after the Directors' Report and before the financial statements (with some transition relief in the first reporting period). That changes what sustainability reporting actually is. It stops being a glossy annual publication and starts needing the same discipline as financial reporting: internal controls, documentation, data ownership, review processes, assurance, audit trails, management sign-off.

Five practical steps to start with

Waiting until 2027 to think about this would be a mistake for any organization inside the 2028 mandatory population. Preparation can realistically start now, with five steps.

1. Run an IFRS S1/S2 readiness assessment

Establish what the organization already reports, what data exists, what's missing, who owns each data point, which risks and opportunities have already been identified, what governance exists, and where the controls are weak. Nigeria's 2026 Sustainability Reporting Guideline (SRG 1) includes an Adoption Readiness Test Assessment built for exactly this.

2. Map what's actually material

Don't start with a list of popular ESG topics — start with the business. Which sustainability-related issues could reasonably affect the business model, cash flows, financing or cost of capital, and over what horizon?

3. Build the data architecture

For every important number: data, owner, source, methodology, frequency, control, review, evidence. For emissions, that might mean a formal inventory. For workforce data, standardizing collection across locations. For environmental performance, better monitoring of energy, water, waste and emissions.

4. Integrate rather than duplicate

Avoid building a whole new bureaucracy. Fold sustainability considerations into what already exists — enterprise risk management, HSE systems, internal controls, procurement, finance, strategic planning, capital decisions, business continuity, internal audit, Board reporting.

5. Start building assurance readiness now

Nigeria's roadmap follows a phased assurance approach, with assurance required from the third year of reporting — limited assurance expanding over time toward reasonable assurance across all disclosures. Don't wait for an external assurer to find the gaps. Ask now, for every number: can we prove this?

Questions worth asking this quarter

• Do we know which sustainability and climate risks could materially affect our business?
• Does the Board actually receive information about those risks?
• Who owns sustainability data within the organization?
• Can our reported emissions be traced back to source data?
• Are climate risks included in enterprise risk management?
• Can Finance connect sustainability risks to financial implications?
• Do our suppliers provide the information we'll eventually need?
• Are our targets supported by reliable baselines?
• Could an independent assurance provider actually verify our disclosures today?

If several of these come back "not yet," that's useful — it tells you exactly where to start.

The bigger shift

The real significance of IFRS S1 and S2 isn't the report itself — it's the change in how organizations are asked to think about sustainability. The question moves from "what good things are we doing?" to "which sustainability and climate-related factors could affect the future performance and resilience of our organization?" That's a much more strategic question, and answering it well takes Boards, Finance, Risk, HSE, Sustainability, Operations, Procurement, Legal and Internal Audit actually working together.

Nigeria has set the direction. The question left for individual organizations is a practical one: are we ready?