What is sustainability reporting?
Sustainability reporting is the disclosure of information about a company's environmental, social and governance performance and risks, alongside its financial reporting. It answers two questions: how do sustainability issues affect the company's prospects, and how does the company affect the world around it?
Which question comes first depends on the standard. IFRS S1, the standard Nigeria has adopted, asks for sustainability risks and opportunities that could reasonably be expected to affect a company's cash flows, its access to finance or its cost of capital. GRI sustainability reporting starts from the other side: the GRI Standards cover the company's impacts on the economy, the environment and people, including human rights.
There are two broad types of sustainability reporting. Voluntary reporting, where a company chooses what to publish and which standard to follow.
And mandatory reporting, where a regulator sets the standard, the content and the deadline. Nigeria is moving from the first to the second.
What is ESG reporting?
ESG reporting is sustainability reporting organised under three headings, often called the ESG framework: environmental, social and governance. In practice the two terms describe the same disclosure, and in Nigeria both now point to reporting under IFRS S1 and S2.
ESG stands for environmental, social and governance. The three pillars, with Nigerian examples:
Environmental
greenhouse gas emissions from diesel generators and grid electricity, water use, waste, and exposure to flooding or heat.
Social
workplace health and safety, labour practices, training, and the company's effect on nearby communities.
Governance
board oversight of sustainability risks, who signs off the figures, and the controls behind them.
Other names you will see for the same thing include ESG disclosure, non-financial reporting and corporate sustainability reporting.
What is the difference between ESG and sustainability reporting?
Mostly the label. "ESG reporting" is the term investors and ratings providers tend to use; "sustainability reporting" is the term standard setters and regulators use, including the FRC's Sustainability Reporting Guideline.
The real difference is between standards, not names. A report built on IFRS S1 and S2 is written for investors and lenders, and includes only information that is material to them.
A report built on GRI covers the company's wider impacts on people and the planet. Many companies use both, and the FRC allows GRI as a source of guidance alongside the IFRS standards, though not in place of them.
Why is sustainability reporting important for companies?
Because lenders, investors and regulators now price sustainability risk, and they can only do that with figures you publish. A company that cannot show its emissions, its climate risks or its controls looks riskier than one that can, whatever its actual position.
The importance of sustainability reporting comes from four places, and so do its benefits:
Regulation
Under the FRC's amended roadmap, reporting is mandatory for public interest entities from 2028 and SMEs from 2030.
Finance
IFRS S1 exists because sustainability risks can affect access to finance and the cost of capital. A lender that reports its own financed emissions may ask for figures from the companies it lends to.
The board
The FRC's chief executive told directors in November 2025 that climate and sustainability governance is now a core fiduciary responsibility.
Management
GRI makes the point that reporting helps a company understand and manage its impacts, identify and reduce risks, and spot opportunities. You cannot manage what you have never measured.
Is sustainability reporting mandatory in Nigeria?
Yes, in phases. Public interest entities, a category that includes all public companies, regulated companies and any company with turnover of ₦30 billion or more, report for periods beginning on or after 1 January 2028; SMEs follow from 1 January 2030.
Before that, the FRC requires a readiness test in three stages, the first due three months before your first reporting period starts. Your exact dates depend on your financial year end. See sustainability reporting deadlines in Nigeria for every date worked out.
Which sustainability reporting standards and frameworks are used?
Nigeria uses the IFRS Sustainability Disclosure Standards, IFRS S1 and IFRS S2, as its reporting standard. Other standards and frameworks, such as GRI and SASB, can support them but not replace them.
The three ESG reporting standards you will meet most often compare like this:
| Standard or framework | What it focuses on | Written for | Status in Nigeria |
|---|---|---|---|
| IFRS S1 and IFRS S2 (ISSB) | Sustainability and climate risks that affect the company's prospects | Investors and lenders | The adopted standard; mandatory from 2028 for public interest entities |
| SASB Standards | Industry-specific disclosure topics and metrics | Investors | SRG 1 says you must consider them where IFRS S1 and S2 do not cover a topic |
| GRI Standards | The company's impacts on the economy, environment and people | All stakeholders | May be used as guidance alongside IFRS, not instead of it |
IFRS S2 covers climate: physical risks such as flooding, transition risks such as new rules or fuel costs, and climate-related opportunities. IFRS S1 covers everything else that is material, and sets the four headings every disclosure uses: governance, strategy, risk management, and metrics and targets.
SRG 1, the FRC's sustainability reporting guidelines, sets the order. IFRS S1 and S2 come first.
Where they do not cover a risk or opportunity, you must consider the SASB Standards, and may then consider another sustainability reporting framework, such as GRI, as long as it does not conflict. For what the FRC adds on top, see what the FRC requires.
How does sustainability reporting relate to accounting and financial reporting?
Closely, by design. Under SRG 1, the sustainability disclosure is a titled section of the annual report, placed after the Directors' Report and before the financial statements, and the FRC roadmap requires it to cover the same period and be published at the same time.
That makes sustainability accounting and reporting part of the annual report cycle, and partly an accounting job. The disclosure must connect to the financial statements, use the same reporting entity, and explain how sustainability risks affect figures such as cash flows and asset values.
Members of ICAN and ANAN are among the professionals SRG 1 lists as eligible to register with the FRC for this work. This is where integrated reporting and sustainability reporting meet: integrated reporting tells one combined story of how financial and sustainability performance fit together.
The materiality concept in sustainability reporting is what links the two. Under IFRS S1, information is material if leaving it out or getting it wrong could reasonably influence the decisions of investors and lenders. That is the same test accountants use for financial statements, applied to sustainability information.
What does a sustainability report look like?
In Nigeria, it is one section of the annual report, not a glossy separate brochure. SRG 1 requires a statement of compliance and the company's disclosure policies at the start, the four IFRS headings in the body, and leaves no room for CSR photos, award pictures or interviews.
Inside, you would expect to find:
Governance
who on the board oversees sustainability, and how management reports to them.
Strategy
the climate and sustainability risks and opportunities that matter, and how they affect the business plan.
Risk management
how those risks are identified, assessed and monitored.
Metrics and targets
Scope 1 and Scope 2 emissions, any targets, and progress against them, plus industry ESG metrics where relevant.
For real sustainability reporting examples, look at the published annual reports of Nigeria's early adopters. MTN, Seplat Energy, Fidelity Bank and Access Bank were among the first, according to the FRC.
What are the challenges of sustainability reporting?
The hardest part is rarely the writing. It is collecting complete, accurate data from many departments and sites, and being able to prove where every figure came from.
The environmental consultancy Environmental Managers Consult found exactly this across two client engagements: information was scattered across departments, records came in different formats, and tracking who was responsible for each data point slowed collection and validation. Three other challenges come up again and again in Nigeria:
Generators
Many sites run on grid power and diesel generators, which sit in different emissions scopes and need separate records.
Evidence
The FRC roadmap requires assurance from the third year of reporting, so every figure needs a bill, log or meter reading behind it.
Scope 3
Value chain emissions depend on suppliers. The FRC lets you leave them out in your first year, but not after.
Where should a Nigerian company start?
Find out which category you fall into and when your first period starts, then begin collecting energy and fuel records now. The readiness test's first stage is due before your first reporting period begins, so the work starts earlier than most people expect.
Three practical next steps:
Check your readiness
Our readiness assessment ends with a written gap analysis and plan, two of the documents the FRC's first stage asks for.
Start measuring
Our guide to carbon accounting walks through a first cycle from boundary to defensible figures.
Read the Nigerian rules
What ESG reporting in Nigeria requires covers the FRC, SEC and NESREA together.
When you are ready to run it on your own data, Emvert's ESG reporting software builds the disclosure in the structure SRG 1 sets, with evidence behind every figure.
Check this yourself
These are the primary documents this guide is based on.