IFRS 18 Readiness: Mastering the 2027 Income Statement Overhaul and System Recalibration for Nigerian Corporates.

Financial reporting is entering an important transition period.

For Nigerian companies that prepare financial statements under IFRS Accounting Standards, IFRS 18 Presentation and Disclosure in Financial Statements introduces significant changes to the presentation of financial performance, including new categories and subtotals in the statement of profit or loss, management-defined performance measures, and enhanced disclosure requirements.

The standard is effective for annual reporting periods beginning on or after 1 January 2027, with earlier application permitted.

For finance teams, boards, accountants, auditors and business owners, the key question is no longer simply whether IFRS 18 will affect the financial statements. The more practical question is:

Are the company's accounting policies, reporting systems, chart of accounts, management reporting and financial-data processes ready for the transition?

For Nigerian corporates, preparation should begin before the first IFRS 18-compliant annual financial statements are issued.

What Is IFRS 18?

IFRS 18 is the International Accounting Standards Board's new standard on Presentation and Disclosure in Financial Statements. It replaces IAS 1, while carrying forward many existing requirements and introducing new presentation and disclosure requirements.

The standard is intended to improve how information about financial performance is presented and disclosed, making financial statements more structured and providing users with additional information about management's performance measures.

Among its important changes are:

• Defined categories in the statement of profit or loss.
• Required presentation of specified subtotals.
• Requirements concerning management-defined performance measures.
• Enhanced aggregation and disaggregation principles.
• Additional disclosure requirements.
• Consequential amendments to other IFRS Accounting Standards.

These changes can affect more than the appearance of the income statement.

They can also influence how financial information is captured, classified, analysed and communicated throughout an organisation.

Why IFRS 18 Matters to Nigerian Corporates

Many Nigerian companies already operate with several layers of financial reporting.

A company may have:

• Statutory financial statements.
• Management accounts.
• Budget reports.
• Board reporting packs.
• Investor reporting.
• Bank reporting.
• Tax computations.
• Regulatory reporting.
• Group consolidation schedules.

These reports often originate from the same accounting records.

IFRS 18 therefore creates an important implementation consideration: the underlying financial data needs to support the classifications and disclosures required for external financial reporting.

A company may discover that its existing chart of accounts does not contain sufficient information to consistently classify certain income and expenses.

That is where system recalibration becomes important.

Understanding the 2027 Income Statement Changes

One of the central changes introduced by IFRS 18 is the classification of income and expenses into defined categories.

The statement of profit or loss will generally present income and expenses within categories including:

1. Operating
2. Investing
3. Financing
4. Income taxes
5. Discontinued operations

The standard also introduces required subtotals, including:

Operating profit or loss

and

Profit or loss before financing and income taxes

The operating category is particularly important because it serves as a residual category for income and expenses that are not classified in another category.

However, classification should not be performed simply by changing account names.

Companies need to assess the nature of transactions, their activities and the specific requirements of IFRS 18.

IFRS 18 and the Chart of Accounts

The chart of accounts is one of the areas Nigerian finance teams should review before implementation.

A traditional chart of accounts may have been designed primarily for bookkeeping and existing financial-statement presentation.

IFRS 18 may require more granular information.

For example, an organisation may need to distinguish between:

• Operating income.
• Investment-related income.
• Financing-related income and expenses.
• Income tax.
• Expenses associated with particular categories.
• Items requiring additional disaggregation.

If several economically different transactions are recorded under one broad account, extracting the information required for IFRS 18 reporting may become difficult.

Practical response

Finance teams should review whether the current chart of accounts can:

• Identify relevant income and expense categories.
• Support required subtotals.
• Produce information needed for disclosures.
• Facilitate comparative-period reporting.
• Support consolidation.
• Generate reliable audit evidence.

Where necessary, account codes, cost centres, reporting dimensions or accounting-system configurations may need to be revised.

System Recalibration: Why Technology Matters

IFRS 18 implementation is not solely an accounting-policy exercise.

It may also require changes to accounting and reporting systems.

Companies using ERP systems, accounting software, spreadsheets or integrated reporting platforms should consider whether their systems can capture and report the information required under the new standard.

System review may include:

1. Chart-of-account mapping

Existing accounts should be mapped to the relevant IFRS 18 presentation categories.

2. Reporting configuration

Financial-reporting templates may need modification to generate the revised statement of profit or loss.

3. Management reporting

Internal management reports should be assessed where management performance measures are used in external financial reporting.

4. Data capture

Where information is currently unavailable at the required level of detail, additional data fields or coding structures may be necessary.

5. Consolidation

Groups should assess how IFRS 18 classifications will flow through consolidation processes.

6. Comparative information

Transition requirements mean that companies need to consider how comparative information will be presented under the new requirements.

Management-Defined Performance Measures: A Major Reporting Consideration

IFRS 18 introduces requirements concerning management-defined performance measures (MPMs).

These are subtotals of income and expenses that:

• Are used in public communications outside the financial statements.
• Communicate management's view of an aspect of financial performance.
• Are not specified by IFRS Accounting Standards.

Examples could include internally developed measures such as an adjusted operating profit measure, where the measure meets the definition under IFRS 18.

The important point is that management cannot necessarily treat such measures as informal information once they fall within the standard's scope.

Companies may need to provide specific disclosures explaining:

• The measure.
• How it is calculated.
• Why management considers it useful.
• How it reconciles to the most directly comparable IFRS-specified subtotal or total.

This makes consistency between financial reporting, investor communications, management presentations and other public communications increasingly important.

Aggregation and Disaggregation: More Than Presentation

Another important aspect of IFRS 18 is the emphasis on appropriate aggregation and disaggregation of information.

Financial statements should provide information that is useful to users without obscuring material information through excessive aggregation.

For Nigerian companies, this raises practical questions.

Are material expenses currently grouped into broad categories?

Can management identify the nature of significant expenses?

Does the accounting system preserve enough information to produce the required disclosures?

Can finance teams explain significant movements between periods?

These questions should be considered during implementation rather than waiting until the financial statements are being finalised.

IFRS 18 Readiness Checklist for Nigerian Companies

A structured readiness assessment can help identify areas requiring attention.

Accounting policies

Review existing accounting policies against IFRS 18 requirements and identify consequential changes.

Chart of accounts

Determine whether account classifications provide sufficient information for the new presentation requirements.

ERP/accounting systems

Assess whether existing systems can generate the required information without excessive manual intervention.

Management reporting

Identify management performance measures and assess whether any meet the definition of MPMs.

Financial statement templates

Update statement-of-profit-or-loss formats and related disclosures.

Comparative information

Plan the process for presenting comparative information in accordance with the transition requirements.

Internal controls

Review controls over classification, reporting, reconciliation and disclosure.

Staff knowledge

Finance personnel should understand the new requirements and how they affect day-to-day accounting.

Audit preparation

Maintain appropriate documentation supporting significant classification and presentation decisions.

Why Nigerian Business Owners Should Pay Attention

IFRS 18 is principally a financial-reporting matter, but its implementation can have wider implications for business management.

The statement of profit or loss is frequently used by:

• Directors.
• Shareholders.
• Investors.
• Banks and lenders.
• Regulators.
• Potential business partners.
• Analysts.
• Management.

Changes to presentation can therefore affect how financial performance is understood.

This does not mean that IFRS 18 changes the underlying economic performance of a company.

Rather, it changes aspects of how financial performance is presented and disclosed.

Business owners should therefore avoid treating implementation as a cosmetic change to the financial statements.

IFRS 18 Is Not a Tax Law

An important distinction should be maintained.

IFRS 18 is an accounting standard.

Nigerian tax liabilities arise under applicable Nigerian tax legislation and administrative requirements.

A company's IFRS financial statements may provide important information for tax computations and compliance, but accounting profit and taxable profit are not necessarily identical.

Consequently, implementing IFRS 18 does not by itself determine:

• Company Income Tax liability.
• Value Added Tax liability.
• Withholding Tax obligations.
• PAYE obligations.
• Capital Gains Tax obligations.
• Other applicable Nigerian taxes or statutory levies.

Companies should maintain appropriate reconciliations between accounting records and tax computations where required.

Why Businesses Should Comply With Nigerian Tax Regulations

Tax compliance is a legal and governance responsibility.

Businesses operating in Nigeria should understand their applicable tax obligations based on their legal structure, activities, turnover, transactions, employees and other relevant circumstances.

Proper compliance can help a company:

• Meet statutory filing and payment obligations.
• Maintain accurate tax records.
• Reduce avoidable filing errors.
• Support responses to tax authority enquiries.
• Maintain appropriate documentation.
• Identify tax liabilities within the required periods.
• Apply available reliefs, exemptions, deductions or incentives where the law permits.
• Support financial reporting and corporate governance.

Tax compliance should not be approached merely as an annual filing exercise.

It should form part of the company's regular financial-control process.

Why Use a Professional Tax Consulting Firm for Tax Filing?

Tax legislation and administrative procedures can involve detailed rules, deadlines, classifications, documentation requirements and electronic filing processes.

For businesses without sufficient in-house tax expertise, professional assistance can provide an additional layer of technical review.

A professional tax consulting firm may assist with:

Tax classification

Reviewing transactions and determining their potential tax treatment based on applicable legislation.

Tax computation

Preparing computations using the company's accounting records and supporting documentation.

Filing review

Checking returns for arithmetic, classification and consistency errors before submission.

Reconciliation

Reconciling accounting records, tax computations, payments and submitted returns.

Documentation

Helping businesses maintain supporting documents required for tax compliance.

Regulatory monitoring

Monitoring relevant changes in tax legislation, regulations and administrative guidance.

Tax authority correspondence

Assisting with professional responses to tax enquiries, where appropriately engaged.

Compliance planning

Helping management identify upcoming filing, payment and documentation obligations.

Professional assistance does not transfer the company's legal responsibilities to the consultant. Management remains responsible for the accuracy and completeness of information supplied and for meeting applicable obligations.

Tax Errors Can Begin With Accounting Records

Tax filing problems do not always originate from the tax return itself.

They can begin with:

• Incorrect revenue classification.
• Missing invoices.
• Incorrect expense coding.
• Unreconciled bank transactions.
• Unsupported expenses.
• Incorrect VAT treatment.
• Incorrect withholding-tax treatment.
• Payroll inconsistencies.
• Differences between accounting records and tax schedules.

This is why accounting and tax processes should not operate as completely separate functions.

A properly maintained accounting system can provide the foundation for more reliable tax compliance.

Nigerian Tax Credits, Reliefs and Incentive Opportunities

Businesses should not focus only on tax liabilities.

Applicable Nigerian tax legislation may provide certain deductions, incentives, exemptions, allowances, credits or other reliefs, depending on the taxpayer and the relevant transaction.

However, these opportunities should be evaluated against the specific statutory conditions.

Businesses should therefore consider whether they qualify for applicable provisions relating to areas such as:

• Capital expenditure and applicable allowances.
• Qualifying business expenditure.
• Approved incentives available to qualifying businesses or sectors.
• Investment-related incentives where applicable.
• Research and development-related provisions where applicable.
• Tax credits established under applicable legislation.
• Sector-specific incentives.
• Reliefs or exemptions subject to statutory conditions.

The correct approach is not to claim every available incentive simply because it appears beneficial.

The correct approach is to determine:

1. Whether the business qualifies.
2. What statutory conditions apply.
3. What documentation is required.
4. Whether approval or certification is necessary.
5. The applicable period.
6. Whether the benefit is available under the relevant law.
7. Whether the claim is consistent with the company's actual activities.

Tax planning should be based on the law and the facts of the taxpayer's circumstances.

Tax Law Should Be Read Before Tax Decisions Are Made

Businesses sometimes make tax decisions based on informal advice, old practices or assumptions that no longer reflect the applicable legal framework.

That approach can create avoidable compliance problems.

Before implementing a tax position, businesses should consider the relevant:

• Tax legislation.
• Regulations.
• Administrative guidance.
• Filing requirements.
• Documentation requirements.
• Effective dates.
• Transitional provisions.

Where a matter is uncertain, professional tax advice should be obtained based on the company's actual facts and the applicable law.

IFRS 18 and Tax: Keep the Two Frameworks Connected but Separate

A Nigerian corporate should ideally maintain a clear relationship between financial reporting and tax compliance.

A simplified structure is:

Accounting records

↓

IFRS financial reporting

↓

Tax reconciliation

↓

Tax computation

↓

Tax return and supporting schedules

The accounting records provide the starting point, but the tax computation must apply the relevant tax rules.

This distinction becomes particularly important when accounting standards change.

An IFRS 18 presentation change does not automatically mean that the underlying tax treatment changes.

A Practical IFRS 18 Implementation Roadmap

Companies preparing for 2027 can consider the following sequence.

Phase 1 — Understand

Identify which entities within the group prepare financial statements under IFRS Accounting Standards and determine the reporting periods affected.

Phase 2 — Assess

Perform a gap analysis covering accounting policies, chart of accounts, systems, reporting and disclosures.

Phase 3 — Map

Map existing income and expense accounts to the expected IFRS 18 presentation categories.

Phase 4 — Reconfigure

Modify accounting-system structures, reporting templates and data-capture processes where necessary.

Phase 5 — Test

Run trial reporting using historical or current-period information to identify classification and disclosure issues.

Phase 6 — Document

Document significant accounting judgements, policies, mappings and controls.

Phase 7 — Train

Ensure finance personnel understand the changes and their responsibilities.

Phase 8 — Review

Conduct an internal technical review before the first IFRS 18 reporting cycle.

What Should CFOs and Finance Directors Ask Now?

Management teams should be able to answer questions such as:

• Which entities in the group are affected by IFRS 18?
• Have our accounting policies been reviewed?
• Can our chart of accounts support the new presentation requirements?
• Can our ERP system produce the required information?
• Which management performance measures are communicated externally?
• Do any of those measures meet the definition of MPMs?
• Can we produce the required reconciliations?
• Are our comparative-period processes ready?
• Have finance personnel received appropriate training?
• Have internal controls been reviewed?
• Can our accounting records support both financial reporting and tax compliance?

If several answers are currently unclear, the implementation process should begin with a structured gap assessment.

The Role of Professional Accountants in IFRS 18 Readiness

Professional accountants can support organisations by bringing technical accounting knowledge, structured documentation and an independent professional perspective to the implementation process.

Depending on the engagement, this may include:

• IFRS 18 impact assessment.
• Accounting-policy review.
• Chart-of-accounts mapping.
• Financial statement redesign.
• Management-defined performance measure assessment.
• Reporting-system review.
• Disclosure planning.
• Comparative-information planning.
• Staff training.
• Tax-accounting reconciliation.
• Implementation documentation.

The precise scope should be agreed with the client based on its circumstances and applicable professional requirements.

Preparing Before 2027

The effective date may appear distant when viewed from the perspective of a single reporting cycle.

However, IFRS 18 implementation can involve several interconnected areas of a business.

Changing a financial-statement template at year-end may be relatively straightforward.

Changing the underlying information architecture can require considerably more planning.

That is why Nigerian corporates should consider IFRS 18 readiness as a financial-reporting and systems project, rather than merely a year-end presentation exercise.

Early preparation provides time to identify data gaps, test classifications, update processes and resolve technical questions before they affect the reporting timetable.

Conclusion

IFRS 18 represents an important development in the presentation and disclosure of financial performance.

For Nigerian corporates reporting under IFRS Accounting Standards, readiness should extend beyond the income statement itself.

Accounting policies, chart of accounts, ERP systems, management reporting, internal controls, disclosures and staff capabilities should be considered together.

At the same time, companies should maintain a clear distinction between IFRS financial reporting and Nigerian tax compliance.

Tax obligations should be determined under applicable Nigerian tax law, while accounting records should provide reliable information for both financial reporting and appropriate tax processes.

For business owners and finance leaders, the practical objective is straightforward:

Understand the requirements, assess the gaps, recalibrate the systems where necessary, document the accounting decisions, and test the reporting process before the first mandatory IFRS 18 reporting period.

US & CO. (Chartered Accountant) supports businesses with accounting, tax and financial-reporting matters based on applicable professional and regulatory requirements.

Frequently Asked Questions About IFRS 18 in Nigeria

1. When does IFRS 18 become effective?

IFRS 18 is effective for annual reporting periods beginning on or after 1 January 2027. Earlier application is permitted.

2. Does IFRS 18 replace IAS 1?

Yes. IFRS 18 replaces IAS 1 Presentation of Financial Statements, while retaining many existing requirements and introducing new presentation and disclosure requirements.

3. Does IFRS 18 change a company's tax liability?

Not automatically. IFRS 18 is an accounting standard. Nigerian tax liabilities are determined under applicable Nigerian tax legislation and administrative requirements.

4. Which Nigerian companies need to consider IFRS 18?

Entities that prepare financial statements in accordance with IFRS Accounting Standards should assess the standard's applicability to their reporting.

5. Will companies need to change their accounting software?

Not necessarily in every case. However, companies should assess whether their existing systems can capture and produce the information required by IFRS 18. Some organisations may need to modify their chart of accounts, reporting dimensions, reports or system configurations.

6. What are management-defined performance measures?

They are certain management-defined subtotals of income and expenses that are used in public communications outside the financial statements, communicate management's view of an aspect of financial performance, and are not specified by IFRS Accounting Standards.

7. Does IFRS 18 affect the statement of profit or loss?

Yes. It introduces defined categories and specified subtotals, together with additional requirements concerning the presentation and disclosure of financial performance.

8. Why should a company review its chart of accounts?

The chart of accounts should provide sufficient information to support the classifications, subtotals and disclosures required for financial reporting. Broad or aggregated accounts may make this more difficult.

9. Can professional accountants assist with IFRS 18 implementation?

Yes. Depending on the engagement, professional accountants may assist with impact assessments, accounting-policy reviews, system mapping, reporting templates, disclosures, training and implementation documentation.

10. Why should businesses use professional assistance for tax filing?

Professional tax assistance can provide technical review of classifications, computations, reconciliations, documentation and filing processes. It can help identify potential errors before submission, although the taxpayer remains responsible for the accuracy and completeness of information provided.

11. Are there tax credits and incentives available to Nigerian businesses?

Potentially, depending on the applicable Nigerian tax legislation, the nature of the business, the transaction, the sector and the statutory conditions. Businesses should verify eligibility and documentation requirements before making a claim.

12. What should a Nigerian company do now?

Begin with an IFRS 18 gap assessment. Review accounting policies, chart of accounts, financial-reporting systems, management performance measures, internal controls, disclosures and comparative-information requirements, and develop an implementation timetable for the 2027 effective date.

Need professional assistance with accounting, IFRS implementation or Nigerian tax compliance?

Where professional assistance is required, a qualified professional accounting or tax adviser can assess the company's specific circumstances and applicable requirements.

US & CO. (Chartered Accountant)
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📧 Email: info@usc.com.ng
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