Nigeria’s tax system underwent a major administrative restructuring with the enactment of the Nigeria Tax Administration Act, 2025.

The Act, which is Act No. 5 of 2025, commenced on 1 January 2026 and provides the administrative framework for the assessment, collection and accounting for tax revenue accruing to the Federal, State and Local Governments. It also prescribes the powers and functions of tax authorities and establishes rules for taxpayer registration, tax returns, assessments, investigations, recovery, refunds, tax clearance and dispute resolution.

The Act should be read together with the Nigeria Tax Act 2025, which primarily provides for the imposition and computation of taxes, and the Nigeria Revenue Service (Establishment) Act 2025, which establishes the Nigeria Revenue Service.

This article explains 20 important provisions of the Nigeria Tax Administration Act that taxpayers, companies, employers, accountants and lawyers should understand.

1. The Act provides the administrative framework for Nigerian taxation

The Nigeria Tax Administration Act is principally concerned with the administration of tax, rather than creating the substantive tax liabilities contained in the Nigeria Tax Act.

Its subject matter includes:

• taxpayer registration;
• Tax Identification;
• tax returns;
• assessments;
• tax payment;
• tax refunds;
• information requirements;
• investigations;
• enforcement;
• recovery of tax;
• tax clearance certificates;
• advance rulings;
• appeals and dispute resolution; and
• administration by State tax authorities.

The distinction is important. A taxpayer may need to consult the Nigeria Tax Act to determine how much tax is payable, while the Nigeria Tax Administration Act determines many of the rules concerning how the liability is administered and enforced.

2. The Act applies across the Nigerian tax system

The Act establishes administrative rules applicable to taxes collected for the Federation, States and Local Governments, subject to the allocation of responsibilities among the relevant tax authorities.

The jurisdictional framework is contained in section 3.

This is important because Nigerian tax administration involves multiple authorities, including the Nigeria Revenue Service and State internal revenue services.

A taxpayer should therefore identify the relevant tax authority before submitting returns, challenging an assessment or dealing with an enforcement action.

3. Taxpayers must obtain a Tax ID

The Act establishes a statutory framework for taxpayer identification.

Under section 6, a non-resident person supplying taxable goods or services to a person in Nigeria or deriving income from Nigeria is required, subject to the statutory exception for certain passive investment income, to register for tax purposes and obtain a Tax ID.

Section 7 provides for the issuance of a Tax ID to taxable persons.

The Tax ID is therefore an important part of the new tax-compliance system.

4. A Tax ID is required for specified transactions and government contracts

Section 8 provides for the use of Tax ID.

A Tax ID must be stated on specified tax returns, notices, correspondence and documents used for tax compliance.

It is also required on documents relating to transactions and is a condition for entering into contracts with Federal or State ministries, departments and agencies and Local Government Councils.

The provision also places obligations on persons engaged in banking, insurance, stockbroking and other financial services concerning Tax IDs.

Businesses should therefore ensure that their Tax ID information is properly maintained and consistently used in tax documentation.

5. Taxpayers must notify the tax authority when important particulars change

The Act requires taxpayers to notify the relevant tax authority of specified changes in their registration particulars.

Section 9 is therefore important where a taxpayer changes information such as:

• business address;
• registered details;
• nature of business;
• contact information; or
• other relevant particulars.

Failure to keep tax-registration information current can create compliance problems, particularly where notices or assessments are subsequently issued.

6. Tax returns are a central part of tax compliance

The Act contains extensive provisions governing the filing of tax returns.

These include provisions dealing with:

• income-tax returns;
• VAT returns;
• returns for tax liabilities;
• returns by virtual-asset service providers;
• returns by priority companies;
• tax-incentive returns; and
• deductions of tax at source.

The relevant provisions are principally contained in sections 21–33.

A taxpayer should therefore not regard filing a tax return as merely an administrative formality. The information supplied in a return can have significant legal consequences.

7. Self-assessment is an important feature of the new system

Section 34 establishes the self-assessment framework.

A taxable person is required to submit a self-assessment tax return on or before the applicable due date.

A properly submitted self-assessment return is treated as an assessment of the amount of tax payable for the relevant reporting period.

The tax authority may subsequently:

1. accept the return without additional assessment;
2. accept the return but make an additional assessment; or
3. reject the return and determine the tax due according to its best judgment.

Self-assessment therefore does not prevent the tax authority from reviewing and adjusting a taxpayer’s declared liability.

8. The tax authority can make an administrative assessment

Where circumstances warrant, the tax authority may determine a taxpayer’s liability through an administrative assessment.

Section 35 provides for administrative assessments.

An assessment may become necessary where, for example, the taxpayer fails to submit a required return or where the information available to the tax authority indicates that the declared liability is inaccurate.

The taxpayer should carefully examine the basis of any assessment rather than assuming that an assessment issued by the tax authority is automatically correct.

9. Additional assessments may be made

Section 36 provides for additional assessments.

An additional assessment may arise where the tax authority subsequently determines that the taxpayer’s original assessment did not reflect the correct tax liability.

This makes accurate record-keeping particularly important.

A taxpayer should maintain sufficient accounting records and supporting documentation to demonstrate how the figures reported in a return were calculated.

10. Tax assessments must be properly served

The Act contains provisions dealing with the service of assessments and notices.

Sections 38–40 address demand for assessment, service of assessment and notice of assessment.

Proper service is important because statutory time limits for objections and other actions may run from the date an assessment or notice is served.

Taxpayers should therefore preserve evidence of:

• when a notice was received;
• how it was delivered;
• the contents of the notice; and
• the date from which any statutory deadline begins.

11. Tax assessments may be revised

Section 41 provides for revision of assessments.

The provision gives the tax administration framework a mechanism for correcting or revisiting assessments in appropriate circumstances.

However, taxpayers should distinguish between a lawful revision of an assessment and an assessment that should instead be challenged through the statutory objection and appeal process.

12. Taxpayers have a right to object to an assessment

One of the most important taxpayer protections is the right to challenge an assessment.

The objection framework is contained in sections 42–43.

A taxpayer who disputes an assessment should not simply ignore it.

The objection should be made in the prescribed manner and within the applicable statutory period, stating the grounds upon which the taxpayer disputes the assessment.

This is one of the areas where prompt legal and tax advice can be particularly important.

13. Taxpayers should distinguish an objection from an appeal

An objection is an administrative challenge made within the tax administration framework.

An appeal, by contrast, involves further review through the applicable dispute-resolution mechanism.

The Act establishes procedures for tax disputes, and these should be read alongside the legislation governing the relevant tribunal or court.

A taxpayer should therefore identify the correct procedural route before commencing proceedings.

14. Tax authorities can require taxpayers to produce information

Section 57 gives the relevant tax authority power to call for returns, books, documents and information.

The authority may require a taxable person to:

• complete and submit a return;
• appear before an officer for examination;
• produce books and records;
• provide information concerning assets; and
• provide other information relevant to tax administration.

This power is broad and makes proper accounting and document-retention systems essential for businesses.

15. Tax officers have powers to access premises and records

Section 58 gives authorised tax officers powers to access lands, buildings, places, books and documents for purposes connected with tax administration.

The power extends to records stored electronically, including information maintained on computers, servers and digital or electronic media.

There are, however, specific safeguards concerning entry into private dwellings.

A judicial authorisation may be required for entry into a private dwelling in the circumstances specified by the Act.

16. Tax officers may remove books and documents to make copies

Section 59 permits an authorised officer, in specified circumstances, to remove books or documents accessed under section 58 for the purpose of making copies.

The provision also deals with certified copies and digital evidence.

This is particularly significant in modern tax investigations because a large proportion of business records are maintained electronically rather than in physical files.

Businesses should therefore have proper document-management and backup systems.

17. Tax authorities have enforcement powers where tax remains unpaid

The Act provides several mechanisms for recovering unpaid tax.

These include:

• appointment of an agent;
• distraint;
• enforcement procedures;
• recovery of tax debts; and
• other statutory measures.

Sections 60–68 contain important enforcement provisions.

A taxpayer who receives an enforcement notice should therefore act immediately rather than waiting until assets or bank accounts are affected.

18. The tax authority may appoint a third party as an agent

Section 60 provides for the power of substitution.

In specified circumstances where tax has become due and payable and the taxpayer has failed or refused to pay, the relevant tax authority may appoint another person as an agent of the taxpayer for purposes of recovering the tax.

This can be particularly significant where third parties hold money belonging to the taxpayer.

Banks, debtors, business partners and other persons who receive statutory notices should therefore take them seriously and obtain appropriate advice where necessary.

19. Tax authorities can distrain property in appropriate circumstances

Section 61 provides for the power to distrain.

Distraint is an enforcement mechanism through which the tax authority may take steps against property for recovery of unpaid tax, subject to the statutory requirements.

The availability of enforcement powers means that unresolved tax liabilities can progress beyond assessments and notices to direct enforcement against a taxpayer’s assets.

20. Tax investigations, penalties and recovery can have serious consequences

The Act contains a dedicated enforcement framework.

Section 64 deals with tax investigation.

Section 65 provides for penalties and interest for non-payment of tax.

Section 67 deals with recovery of tax.

These provisions demonstrate why taxpayers should not wait until enforcement begins before addressing tax disputes.

Where a taxpayer genuinely disputes a liability, the appropriate objection or appeal process should be considered promptly.

Tax Clearance Certificates

The Act contains a specific framework for tax clearance certificates.

Under section 72, where the relevant tax authority is satisfied that the tax assessed on a person’s profits or income has been fully paid, or that no tax is due, it is required to issue a tax clearance certificate within the statutory period or provide reasons for refusal.

A tax clearance certificate discloses information concerning the taxpayer’s tax position for the relevant years, including:

• total profits or chargeable income;
• tax payable;
• tax paid; and
• tax outstanding.

Tax clearance can be important for government transactions, regulatory requirements, banking matters and other transactions specified by law.

Advance Tax Rulings

The Act introduces a formal framework for advance rulings.

Sections 73–76 deal with applications for advance rulings, rejection, effect, withdrawal and modification.

An advance ruling can provide greater certainty to a taxpayer concerning how the tax authority will treat a proposed transaction or arrangement.

For complex transactions, an advance ruling may therefore be an important tax-planning and risk-management tool.

Technology and Tax Administration

Section 71 provides for the deployment of technology in tax administration.

This reflects the increasing digitisation of Nigerian tax administration.

Taxpayers should expect greater reliance on:

• electronic registration;
• electronic filing;
• electronic invoicing;
• digital payment systems;
• automated assessments;
• electronic communication; and
• data matching.

Businesses should therefore ensure that their accounting and tax systems can produce reliable digital records.

Digital Assets and Virtual-Asset Tax Administration

The Act also recognises the tax administration implications of digital and virtual assets.

Section 79 addresses taxation of digital and virtual transactions or assets.

The Act also provides specific rules concerning virtual-asset service providers and assigns responsibilities to the relevant regulatory authority in accordance with the statutory framework.

This is particularly important as cryptocurrency, digital assets and other virtual-asset transactions become increasingly relevant to Nigerian taxpayers and regulators.

Practical Tax-Compliance Checklist

Every business should consider implementing the following:

1. Obtain and maintain a valid Tax ID

Ensure the correct Tax ID is used consistently in tax and relevant transaction documentation.

2. Register with the correct tax authority

Identify the authority responsible for each tax obligation.

3. File returns on time

Do not assume that the absence of immediate tax liability eliminates the obligation to file a return.

4. Maintain proper books and records

Keep sufficient documentation to support income, expenses, deductions, exemptions and tax computations.

5. Monitor assessments

Review every assessment received from a tax authority.

6. Object promptly

Where an assessment is disputed, comply with the statutory procedure and time limits for objection.

7. Preserve evidence of service

Keep copies of notices and evidence of when and how they were received.

8. Prepare for tax audits

Maintain organised physical and electronic records capable of being produced during an investigation.

9. Monitor tax clearance

Ensure tax clearance requirements are addressed before transactions requiring evidence of tax compliance.

10. Obtain professional advice for significant disputes

Tax assessments involving substantial sums, complex transactions or enforcement measures should be reviewed by qualified tax counsel or advisers.

Frequently Asked Questions

What is the Nigeria Tax Administration Act 2025?

It is the principal legislation governing the administration, assessment, collection and enforcement of taxes in Nigeria, including taxpayer registration, returns, assessments, investigations, recovery, refunds and tax clearance.

When did the Nigeria Tax Administration Act 2025 commence?

It commenced on 1 January 2026.

What is a Tax ID?

A Tax ID is the taxpayer-identification number used within the statutory tax-administration framework.

Is a Tax ID required for government contracts?

Yes. Section 8 makes a Tax ID a condition for entering into specified contracts with Federal and State ministries, departments and agencies and Local Government Councils.

Can a tax authority demand a taxpayer’s books and records?

Yes. Section 57 empowers the relevant tax authority to call for returns, books, documents and information for tax-administration purposes.

Can tax officers enter business premises?

Yes, subject to the statutory requirements. Section 58 provides powers of access to lands, buildings, places, books and documents. Additional safeguards apply to private dwellings.

Can a tax authority recover unpaid tax from a third party?

The Act provides enforcement mechanisms including the power of substitution under section 60, subject to the statutory requirements.

What happens if tax is not paid when due?

The Act provides for penalties and interest for non-payment and mechanisms for recovery of outstanding tax.

Can a taxpayer challenge a tax assessment?

Yes. The Act provides an objection framework, and further appeal mechanisms are available under the applicable law.

What is an advance tax ruling?

It is a formal mechanism through which a taxpayer may obtain a determination concerning the tax treatment of a proposed transaction or arrangement, subject to the statutory requirements.

Conclusion

The Nigeria Tax Administration Act 2025 is the procedural backbone of Nigeria’s new tax regime.

While the Nigeria Tax Act 2025 determines many of the substantive tax liabilities, the Tax Administration Act determines how taxpayers are registered, how returns are filed, how assessments are made, how tax authorities obtain information, how disputes are handled and how unpaid tax may ultimately be recovered.

The most important practical lesson for taxpayers is that a tax assessment should never simply be ignored. An assessment that appears incorrect should be reviewed immediately and challenged through the appropriate statutory procedure where necessary.

Businesses should also maintain accurate records, monitor tax notices, comply with filing deadlines and ensure that their tax-registration information remains current.

For detailed legal research, consult the Nigeria Tax Administration Act, 2025 on Nigerian LawCompass and read the relevant provisions together with the Nigeria Tax Act 2025, the Nigeria Revenue Service (Establishment) Act 2025 and other applicable tax legislation.

Legal Disclaimer: This article is provided strictly for information and educational purposes only. It is not intended to constitute, and should not be relied upon as, legal advice. The application of Nigerian tax law depends on the facts and circumstances of each case, the applicable legislation, regulations, administrative practice, contractual arrangements and judicial decisions. Professional legal or tax advice should be obtained before taking action in relation to a particular assessment, tax dispute, transaction or enforcement proceeding.