Nigerian businesses must generally keep tax records for six years from the end of the relevant tax year, because that is how far back the Nigeria Revenue Service (NRS) can typically reach in an audit. Fixed-asset records need to survive the life of the asset plus six more years, and where fraud or deliberate evasion is suspected, there is no time limit at all.
Record-keeping used to be the quiet cousin of Nigeria's compliance conversation — everyone asked about VAT deadlines and PAYE bands, few asked what happens when NRS wants to see the paperwork behind them. That has changed. Section 102 of the Nigeria Tax Administration Act 2025 puts a specific fine on any business that cannot produce its books, and the e-invoicing rollout, already live for large and medium taxpayers, means NRS now holds a digital trail of your transactions regardless of your own filing system. Here is what to keep, for how long, and how to build a system that survives an audit.
What Tax Records Must Nigerian Businesses Keep?
The records NRS expects depend on which taxes your business is registered for. At minimum, plan for four categories:
- VAT: sales invoices issued, purchase invoices showing the supplier's Tax ID, monthly VAT returns, credit and debit notes, and evidence of payment.
- PAYE: employment contracts, monthly payroll schedules, PAYE computation sheets, remittance receipts, annual returns and pension contribution records.
- Withholding tax: vendor invoices, WHT credit notes, remittance schedules, and proof of payment to NRS.
- Companies income tax: audited financial statements, trial balances and ledgers, a fixed asset register, bank statements, and tax computations and returns.
How Long Should You Keep Tax Records in Nigeria?
Six years from the end of the tax year is the working rule for most records, matching the period NRS can typically reopen for a routine audit. Fixed asset documentation should run for the asset's full useful life plus six years afterward, since capital allowance claims can be queried long after purchase. The one exception that overrides every retention calendar: where NRS suspects fraud or deliberate non-disclosure, there is no statutory cut-off, so records connected to a live dispute should never be scheduled for disposal.
Are Digital or Electronic Records Acceptable?
Generally, yes. A clear digital copy — a proper PDF scan, not a blurry phone shot — is acceptable for most purposes if you can produce it on request. Best practice is a hybrid approach: keep signed physical originals for high-value contracts and any document a counterparty could dispute, and rely on digital copies for the routine volume of invoices, receipts and schedules. Whichever format you choose, back it up off-site, since a fire, flood or crashed hard drive is not a defence NRS is required to accept.
What Happens If You Don't Keep Proper Records?
Section 102 of the Tax Administration Act 2025 makes this a standalone offence: a business that fails to maintain adequate accounting records, or refuses to produce them when NRS asks, faces an administrative penalty of ₦10,000 for an individual and ₦50,000 for a company. That fine is the smaller cost. The bigger one shows up at audit — an expense you cannot document gets disallowed, an input VAT claim without a matching purchase invoice is rejected outright, and a withholding tax credit without its certificate cannot be offset against what you owe.
How to Build an NRS-Compliant Record-Keeping System, Step by Step
- Map every record to the tax it supports. Run four folders — VAT, PAYE, withholding tax, and companies income tax — rather than one general "documents" drawer, so nothing is missing when a specific audit request lands.
- Set a retention calendar keyed to your tax year-end. Note the earliest safe disposal date for each folder — six years after that year closes, longer for fixed assets.
- Digitise at the point of transaction. Scan or photograph purchase invoices and receipts the day they arrive. Your sales side is already timestamped automatically if you are on the e-invoicing platform, so this closes the gap on the purchase side.
- Ring-fence anything under dispute. Records connected to an open query, audit or suspected fraud enquiry go into a separate hold folder outside the normal retention clock, since those have no fixed expiry.
- Name one owner. Make a single finance lead accountable for the archive, so producing six years of records during an audit is a lookup, not a scramble across departments.
What Does This Mean for Your Business?
- Treat record-keeping as insurance, not paperwork. The ₦50,000 fine for a company is trivial next to a disallowed expense line or a rejected VAT claim during audit.
- Use your e-invoicing rollout to clean up the whole trail. If you are already generating structured digital sales data, extend the same discipline to purchases and payroll rather than running two systems side by side.
- Check your six-year archive now. Confirm you can actually retrieve 2021-vintage records today, before an audit notice forces the question.
A tidy archive is only useful if you also know what an audit looks for. Pair this with our guides on how to prepare for an NRS tax audit and how to prepare for NRS e-invoicing compliance before enforcement reaches your business size.
FAQ
How far back can NRS audit a business in Nigeria? Generally up to six years from the end of the relevant tax year for a routine audit. Where fraud or deliberate non-disclosure is suspected, NRS is not bound by that limit and can look back further.
Can I keep my tax records only in digital format? In most cases, yes — a clear scan or PDF is acceptable if you can produce it on request. It is still good practice to keep signed physical originals for high-value contracts and any document a counterparty could later dispute.
What is the penalty for not keeping proper tax records under the 2025 Tax Act? Section 102 of the Tax Administration Act 2025 sets an administrative penalty of ₦10,000 for an individual and ₦50,000 for a company that fails to maintain adequate records or refuses to produce them when requested.
Building an audit-ready record-keeping system doesn't have to mean starting from scratch. VOG Global Consult helps Nigerian businesses map their records to each tax type, set a retention schedule, and get their books ready before NRS asks. To book a compliance review, contact VOG Global at Suite 060 to 061, Orago Complex, Area 10, Garki, Abuja.