Many business owners in Nigeria believe that after six years, they can safely dispose of old financial records without fear of tax audits or additional assessments. However, this assumption is based on incomplete knowledge of the Nigeria Tax Administration Act (NTAA). Under Section 36 of the NTAA, the tax authority has the power to revisit old books beyond the six-year mark. If businesses cannot provide proof of their financial transactions because they discarded their records, they will face significant penalties.
Section 36(1) of the NTAA states that the tax authority has six years to review a company's tax position and raise an additional assessment if necessary. However, Section 36(2) provides an exception, allowing the tax authority to continue an audit or raise extra tax bills if they started the audit before the six-year period expired. This provision creates a loophole that can lead to businesses being caught off guard by tax audits that drag on for years.
The NTAA also provides for situations where the clock stops completely. Section 36(4) states that if there is a "deliberate misstatement" on tax filings, the tax authority can come after a business at any time to recover missing funds. This provision effectively erases the six-year limitation, allowing tax investigators to reopen old records and assess additional taxes.
The reality on the ground is stark, with tax investigators using Section 36(4) to revisit closed periods spanning over two decades. When tax officers suspect unrecorded revenue, fake expense claims, or hidden transactions, they use this statutory power to reopen books that were thought to be long closed. The burden of proof rests squarely on the shoulders of the business owner, who may have shredded receipts, lost bank statements, or deleted old accounting files.
To make matters worse, Section 36(5) allows the tax authority to use new facts to recalculate a company's tax bill for a particular year, even if they already audited that period before. This provision means that businesses cannot claim "double jeopardy" or argue that an old year was already closed if new evidence shows that their declarations were incomplete.
The conflict between general corporate rules and tax legislation is a major reason business owners fall into this trap. While corporate guidelines recommend retaining financial documents for six years, tax legislation creates an ongoing legal exposure that ignores this safety net. When a tax audit stretches far beyond the statutory limit or a historical misstatement is alleged, saying "our company policy said we should destroy records after six years" will not stop the revenue service from issuing a heavy additional assessment.
To protect their businesses from sudden historical tax liabilities, business owners need to adopt a smarter strategy. This includes going digital and keeping permanent records, scanning every invoice, and storing cloud backups of all bank statements and tax returns indefinitely. By taking these steps, businesses can ensure that they are prepared for any eventuality and can avoid the risks associated with discarding old financial records.
Key points
- The tax authority can revisit old books beyond the six-year mark under Section 36 of the Nigeria Tax Administration Act.
- Businesses that discard financial records after six years risk huge tax liabilities if they cannot provide proof of their financial transactions.
- Going digital and keeping permanent records can help businesses protect themselves from sudden historical tax liabilities.
