Preparing for a FIRS Tax Audit: Best Practices for Nigerian Companies.





For Nigerian companies, a tax audit by the Federal Inland Revenue Service (FIRS) is a standard process aimed at ensuring tax compliance and fairness in the tax system. As an audit firm, we understand that being prepared for a tax audit is crucial to minimize disruptions and ensure a smooth and successful audit process. In this article, we will discuss best practices for Nigerian companies to effectively prepare for a FIRS tax audit and demonstrate their commitment to transparency and compliance.


  1. Maintain Accurate and Organized Financial Records:

The foundation of a successful tax audit is maintaining accurate and well-organized financial records. Companies must keep detailed records of income, expenses, deductions, exemptions, and other relevant financial transactions. All supporting documents, such as invoices, receipts, bank statements, and tax returns, should be kept securely and readily accessible for audit purposes.


  1. Comply with Tax Regulations Proactively:

Proactive tax compliance is key to avoiding issues during a tax audit. Companies should stay updated with the latest tax laws and regulations, ensuring they are aware of any changes or amendments that may impact their tax obligations. Proactively adhering to tax regulations will not only reduce the risk of errors but also demonstrate a commitment to compliance.


  1. Conduct Regular Internal Audits:

Conducting regular internal audits can help companies identify potential compliance issues before they escalate. Internal audits can review financial records, tax calculations, and procedures to ensure accuracy and compliance. Addressing any identified issues promptly will help the company resolve potential problems before the FIRS tax audit.


  1. Engage Experienced Tax Professionals:

Partnering with experienced tax professionals or hiring a reputable audit firm can provide valuable guidance and support during the tax audit process. Tax professionals can review the company’s financial records, assess compliance status, and identify areas that may require improvement. Their expertise can significantly enhance the company’s readiness for the tax audit.


  1. Develop Strong Internal Controls:

Implementing robust internal controls is essential for ensuring accurate financial reporting and tax compliance. Effective internal controls can prevent errors, detect potential issues early, and provide the necessary documentation to support tax positions. This level of organization and control will be highly beneficial during a tax audit.


  1. Address Prior Audit Recommendations:

If the company has undergone a tax audit previously and received recommendations, it is essential to address and implement those suggestions. The FIRS may follow up on prior recommendations during the current audit, so addressing them promptly demonstrates a commitment to improvement and compliance.


  1. Be Transparent and Cooperative:

During the tax audit, the company’s attitude and cooperation play a significant role in shaping the audit experience. Being transparent, honest, and forthcoming with requested information will foster a positive relationship with the FIRS auditors. Avoiding delays and providing necessary documents promptly will help expedite the audit process.


  1. Attend Tax Audit Training:

For companies with a dedicated finance or tax team, attending tax audit training can be immensely beneficial. Training sessions can help the team members understand the tax audit process, their roles, and how to respond to auditor inquiries effectively.



Preparing for a FIRS tax audit is an essential part of being a responsible and compliant Nigerian company. By maintaining accurate financial records, proactively complying with tax regulations, conducting internal audits, and seeking professional guidance, companies can enhance their readiness for a tax audit. The cooperation, transparency, and professionalism exhibited during the audit process will reflect the company’s commitment to compliance and contribute to a positive outcome. Remember, a well-prepared tax audit not only ensures adherence to tax laws but also strengthens the company’s reputation and credibility in the business community.


For professional advice on Accountancy, Transfer Pricing, Tax, Assurance, Outsourcing, online accounting support, Company Registration, and CAC matters, please contact Sunmola David & CO (Chartered Accountants & Tax Practitioners) at Lagos, Ogun state Nigeria offices, You can also reach us via WhatsApp at +2348038460036.