Tax Audit Process by FIRS: A Comprehensive Case Study of XYZ Limited

This edition of A Stitch In Tax, Saves Cash newsletter presents an in-depth examination of the tax audit process conducted by the Federal Inland Revenue Service (FIRS) in Nigeria, using a detailed case study of XYZ Limited, a medium-sized manufacturing company. The newsletter provides each step involved in the audit, offering insights into the procedures, challenges, and resolutions encountered during the process.

Tax Audit Process by FIRS


The tax audit process is an essential mechanism employed by tax authorities to ensure compliance with tax laws and regulations. The FIRS, as the apex tax regulatory body in Nigeria, conducts audits to verify the accuracy and completeness of taxpayers’ financial and tax-related information. This newsletter outlines the intricate details of the tax audit process using a hypothetical scenario involving XYZ Limited, a manufacturing entity operating in Nigeria.

Case Study Scenario:

XYZ Limited is a prominent manufacturing company headquartered in Lagos, Nigeria. With an annual turnover exceeding the threshold set by FIRS, the company was selected for a tax audit. The audit aimed to evaluate XYZ Limited’s adherence to Nigerian tax regulations and to identify any potential inconsistencies in its tax reporting.

Step 1: Notification and Preparation:

The tax audit process begins with an official notification from FIRS to XYZ Limited, detailing the scope and period of the audit. Upon receipt of the notice, the company assembles a team comprising finance professionals, tax consultants, and legal representatives to initiate the preparation process. This stage involves the meticulous gathering of financial records, tax returns, and other relevant documents.

Step 2: Opening Meeting:

An opening meeting is convened between XYZ Limited and the FIRS audit team. During this session, the audit’s objectives, scope, and timeline are discussed. The company’s representatives offer insights into their financial systems, operational processes, and tax-related practices.

Step 3: Information Gathering:

The data collection phase requires XYZ Limited to submit an array of financial statements, accounting records, and other requested documents to the FIRS audit team. Additionally, interviews are conducted with key personnel to gain a comprehensive understanding of the company’s operations, financial practices, and tax compliance mechanisms.

Step 4: Examination and Analysis:

FIRS thoroughly examines the submitted materials, scrutinizing XYZ Limited’s adherence to various tax obligations, including corporate income tax, value-added tax (VAT), and withholding tax. A detailed examination is conducted, reviewing the company’s reported figures and historical data to identify potential irregularities.

Step 5: Findings and Discussions:

Upon completion of the examination, FIRS communicates preliminary findings to XYZ Limited, highlighting any discrepancies, potential tax liabilities, and areas of concern. After discussions ensue between the company and FIRS, allowing XYZ Limited. to provide explanations and clarifications for any identified issues.

Step 6: Reconciliation and Resolution:

To address confirmed discrepancies, XYZ Limited collaborates closely with FIRS to reconcile differences. This stage may involve recalculating tax liabilities and providing more supporting documents to defend her position. A formal agreement is then reached, outlining the adjusted tax liabilities and potential penalties.

Step 7: Finalizing the Audit:

FIRS compiles a comprehensive final audit report, detailing the entire audit process, findings, adjustments made, and agreed-upon tax liabilities. This report serves as the foundation for the subsequent stages of the audit process.

Step 8: Closure and Compliance:

Following the compilation of the final report, XYZ Limited can respond to the findings and conclusions presented. In cases where additional tax liabilities are determined, the company is required to make the requisite payments within the stipulated time limit. FIRS confirms compliance upon the settlement of tax liabilities, effectively concluding the audit process.


The tax audit process conducted by FIRS plays a pivotal role in ensuring tax compliance among companies operating in Nigeria. The case study of XYZ Limited exemplifies the intricate steps involved, from notification to compliance. This newsletter offers valuable insights into the procedural nuances of tax audits, underscoring the significance of transparency, cooperation, and accurate reporting for a seamless audit experience.

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More About Author:

Olatunji is the founder Taxmobile.Online and Managing Partner/CEO of AOA Professional Services. Prior to this, Olatunji worked as Director, Tax & Regulatory Services at Nolands Nigeria Professional Services, Senior Manager -Tax, Regulatory & Advisory Services at Saffron Professional Services.


The information contained herein is general and is not intended, and should not be taken, as legal, accounting or tax advice provided by Taxmobile.Online Inc to the reader. This information remains strictly the opinion of Taxmobile.Online Inc.

The reader also is cautioned that this material may not apply to, or suitable for, the reader’s specific circumstances or needs, and may require consideration of other tax factors if any action is to be contemplated. The reader should contact his or her Tax Advisers before taking any action based on this information.

All rights reserved. No part of this document may be reproduced, retransmitted or otherwise redistributed in any form or by any means, electronic or mechanical, including by photocopying, facsimile transmission, recording, rekeying, or using any information storage and retrieval system, without written permission from Taxmobile.Online Inc.

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