Tax filing is harder when you treat it as a deadline problem. By the time the deadline is close, you may already be looking for missing invoices, old receipts, unexplained bank transfers, and WHT credit notes you never collected.
For many Nigerian small businesses, the real work is not the filing itself. The real work is keeping records during the month so VAT, withholding tax, company income tax, and payroll-related records can be reviewed without rebuilding the business history from scratch.
This guide explains the main tax records Nigerian SMEs should keep, the taxes that often affect day-to-day business, and a practical routine for staying ready before filing time.
This is general educational information, not tax or legal advice. Tax treatment can depend on your industry, company structure, transaction type, turnover, location, and filing history. Confirm unclear issues with the Nigeria Revenue Service (NRS), your State Internal Revenue Service, or a qualified tax professional.
FIRS, NRS, and What Changed
Many business owners still say FIRS because that was the familiar name for federal tax administration. Under Nigeria's 2025 tax reform framework, the Federal Inland Revenue Service was replaced by the Nigeria Revenue Service for federal revenue administration.
The Federal Government's transition guidance says the Tax Acts 2025 apply from their commencement dates, with the Nigeria Tax Act applying from 1 January 2026. It also says tax liabilities, assessments, audits, investigations, disputes, and enforcement actions for earlier periods are handled under the previous laws. You can read the Federal Ministry of Finance transition note here.
For a business owner, the practical lesson is simple: do not assume every old rule disappeared at once, and do not assume every 2026 transaction follows the old treatment. The date of the transaction, the accounting period, and the type of tax can all matter.
If your business has unpaid taxes, open audits, old assessments, or returns for accounting periods before 1 January 2026, ask your accountant to confirm which law applies before filing or responding to the tax authority.
The Taxes Most Nigerian SMEs Need to Prepare For
The taxes that affect your business depend on what you sell, how you are registered, whether you have employees, and whether you pay vendors who fall under withholding tax rules.
Below are the taxes most SMEs encounter in normal operations.
Value Added Tax
Value Added Tax, or VAT, is charged on taxable supplies of goods and services. Under the Nigeria Tax Act, the VAT rate is 7.5% on taxable supplies, subject to exemptions and special rules. A public copy of the gazetted Nigeria Tax Act text shows the 7.5% VAT rate here.
If your business is required to charge VAT, the VAT you collect from customers is not sales income. You are holding it for remittance after considering the rules on input VAT, which is VAT you paid on qualifying purchases.
For example, if your business sells taxable goods for ₦1,000,000 before VAT, VAT at 7.5% is ₦75,000. The customer pays ₦1,075,000, but only ₦1,000,000 is sales income. The ₦75,000 should be recorded separately as VAT collected.
Some small businesses may be exempt from certain VAT registration or filing obligations under the 2025 framework, and a qualifying business may also choose to opt in. Do not rely on turnover alone without checking the current rules and your tax registration status.
Withholding Tax
Withholding tax, or WHT, is tax deducted at source from certain payments. It is common in contracts, professional services, rent, commissions, directors' fees, and other specified transactions.
WHT can affect you in two ways. A customer may deduct WHT before paying your invoice. Your business may also need to deduct WHT before paying a vendor.
Suppose you invoice a corporate client for ₦500,000 for consulting work. If the client deducts WHT, the amount that lands in your bank account may be less than ₦500,000. That difference is not a discount. It is tax deducted from your payment, and you need evidence of the deduction so your accountant can treat it properly.
The 2024 Deduction of Tax at Source Regulations changed parts of the WHT framework, including rates, exemptions, and administration. The Joint Revenue Board lists the withholding tax regulations among Nigeria's active revenue policies here. Because WHT rates depend on the transaction and the parties involved, confirm the rate before deducting or accepting a deduction.
Company Income Tax
Company Income Tax, or CIT, is tax on company profits. Profit means revenue minus allowable business expenses and other tax adjustments. It is not the same as the money sitting in your bank account.
Under the Nigeria Tax Act, a small company is taxed at 0% for company income tax, while other companies are taxed at 30% from commencement. The same Act defines a small company as a business with gross turnover of ₦100,000,000 or less per year and total fixed assets not exceeding ₦250,000,000.
That 0% rate does not mean you can ignore your records. You still need books that show your turnover, expenses, profit, assets, and filing position. Without records, it becomes harder to prove that your business qualifies as a small company.
PAYE and Employee Records
PAYE means Pay As You Earn. It is personal income tax deducted from employee salaries and remitted to the relevant State Internal Revenue Service, not usually to NRS.
Even though PAYE is not a federal company tax, it belongs in your tax preparation routine if you have employees. Payroll records affect staff trust, state tax compliance, pension records, and your financial statements.
At minimum, keep a monthly record of gross salary, pension deductions where applicable, PAYE deducted, net salary paid, staff loans or advances, and proof of payment.
Development Levy and Other Company Obligations
The 2025 tax framework also introduced changes to development levies and other company tax obligations. These do not affect every small business in the same way.
If your company is no longer within the small company threshold, operates in a regulated industry, has foreign transactions, receives incentives, or has a complex group structure, get professional advice before filing. This is where a small mistake can become expensive.
What Good Tax Preparation Looks Like
Good tax preparation starts before the tax form. It starts with clean bookkeeping.
A tax-ready business can answer these questions without guesswork:
- Which sales were taxable?
- Which sales were exempt?
- Which customers still owe money?
- Which vendors were paid?
- Which payments had WHT deducted?
- Which expenses have receipts or invoices?
- How much VAT was collected?
- How much VAT was paid on purchases?
- What profit did the business make for the period?
- Which filings are due this month, this quarter, and this year?
If those answers live only in bank alerts, WhatsApp chats, POS slips, and someone's memory, tax filing will be stressful.
Example: Preparing Tax Records for One Month
Imagine a Lagos-based design and printing company with these July transactions:
- It invoices a client ₦1,000,000 before VAT for branded packaging.
- VAT at 7.5% adds ₦75,000, so the invoice total is ₦1,075,000.
- The client pays ₦975,000 after deducting ₦100,000 WHT.
- The business buys materials for ₦400,000 plus ₦30,000 VAT.
- It pays a freelance designer ₦150,000 and needs to check whether WHT applies.
- It pays two staff members ₦250,000 each for July salaries.
If the owner only checks the bank balance, the records will be confusing. The ₦975,000 received is not the full invoice value. The ₦100,000 deduction needs a WHT credit note or other acceptable evidence. The ₦75,000 VAT collected should not be treated as extra profit. The ₦30,000 VAT paid on materials needs to be recorded separately so the accountant can assess the VAT position.
A tax-ready record would show:
| Item | Amount | How to record it |
|---|---|---|
| Sales before VAT | ₦1,000,000 | Revenue |
| VAT charged | ₦75,000 | VAT collected |
| Invoice total | ₦1,075,000 | Customer invoice |
| Cash received | ₦975,000 | Bank receipt |
| WHT deducted by client | ₦100,000 | WHT credit or tax receivable, subject to evidence |
| Materials before VAT | ₦400,000 | Expense or inventory, depending on treatment |
| VAT on materials | ₦30,000 | Input VAT, subject to the VAT rules |
| Freelance payment | ₦150,000 | Vendor payment, check WHT treatment |
| Staff salaries | ₦500,000 | Payroll expense, with PAYE records handled separately |
This is the difference between filing from records and filing from memory.
Records to Keep Before Filing
You do not need a complicated system to prepare for tax. You need complete records that are easy to trace.
Sales records
Keep invoices, receipts, credit notes, POS reports, sales summaries, and delivery records. Each sale should show the customer, date, item or service, amount before VAT, VAT charged where applicable, total amount, and payment status.
If you issue invoices on credit, track whether the customer has paid. Tax and accounting treatment can depend on the invoice date, supply date, and payment date, so keep all three where possible.
Expense records
Keep supplier invoices, receipts, contracts, bank payment evidence, and approval notes for major spending. A bank debit alone does not always explain the expense.
For example, "₦850,000 transfer to Chinedu" is not a tax-ready record. "₦850,000 paid to Chinedu Packaging Ltd for 5,000 branded cartons, invoice CP-118, dated 12 July 2026" is much easier to support.
VAT records
For VAT, separate the amount before VAT from the VAT amount. Record VAT charged on sales and VAT paid on purchases in separate accounts.
Also identify exempt or zero-rated transactions instead of forcing every sale into one category. If you are unsure whether a product or service is VATable, ask before filing.
WHT records
For WHT deducted from your invoices, keep the invoice, proof of payment, deduction details, and credit note or other acceptable evidence. Without evidence, your accountant may not be able to use the deduction correctly.
For WHT you deduct from vendors, record the vendor, Tax ID if available, transaction type, gross amount, WHT rate applied, amount deducted, net payment, and remittance evidence.
Payroll records
If you have staff, keep employment details, monthly payroll schedules, PAYE computation, pension deductions where applicable, staff advances, net salary payments, and remittance receipts.
Payroll should not sit inside general transfers with no explanation. It affects your expenses, employee records, and state tax compliance.
Bank and cash records
Reconcile bank statements, POS settlements, cash sales, petty cash, and payment processor reports. Reconciliation means checking that your records match what actually entered and left the bank.
This catches duplicated sales, missing POS settlements, customer underpayments, bank charges, failed transfers, and supplier overpayments.
A Practical Tax Preparation Routine
The easiest tax filing is built one week at a time.
Weekly
Match bank inflows to invoices and receipts. Record expenses while the details are still fresh. Upload receipts and supplier invoices. Separate personal spending from business spending.
For cash-heavy businesses, record cash sales and cash expenses daily if possible. A restaurant, salon, supermarket, or pharmacy can lose too much detail by waiting until Friday.
Monthly
Review VAT and WHT schedules. Confirm which customer invoices remain unpaid. Check whether WHT was deducted from your payments and whether you have evidence. Reconcile POS settlements and bank accounts.
If you have employees, review payroll and PAYE records before salaries go out. It is easier to correct payroll before payment than to explain old mistakes later.
Quarterly
Review profit and cash flow. Check whether your turnover is approaching a tax threshold. Look at supplier balances, customer debts, owner withdrawals, loans, and asset purchases.
This is also a good time to speak with your accountant if your business has grown, added staff, started importing, signed a large contract, or changed its pricing.
Year-end
Close the year with clean records. Confirm inventory, unpaid invoices, supplier balances, loans, fixed assets, payroll records, tax filings, and bank reconciliations.
For company income tax, existing companies generally file within six months after the end of their accounting year. Newly incorporated companies can have a different first filing timeline, so confirm your deadline early. Section 11 of the Nigeria Tax Administration Act 2025 sets out the six-month rule for existing companies and the first-return rule for new companies; one accessible published version is available here.
Common Tax Preparation Mistakes
Most tax problems start as record problems. Below are the mistakes to watch.
Treating VAT as income
VAT collected from customers should be recorded separately. If you spend it as normal cash, the business may be short when it is time to remit.
Ignoring WHT deductions
If a client deducts WHT and pays you the net amount, record the deduction. Follow up for the credit note or evidence while the transaction is fresh.
Waiting until December to sort receipts
Old receipts fade. Vendors change phone numbers. Staff forget what a transfer was for. Weekly recordkeeping is less painful than a year-end reconstruction.
Filing without reconciling the bank
If the bank statement and ledger do not agree, your tax numbers may be wrong. Reconcile before filing, especially for months with high sales, refunds, failed transfers, or multiple POS terminals.
Assuming one rule applies to every business
Tax depends on facts. A retailer, consultant, logistics company, restaurant, and software business may have different VAT, WHT, payroll, and expense issues.
When to Speak With a Tax Professional
Some issues are worth checking before you file.
Speak with an accountant or qualified tax adviser if:
- Your business has old unpaid taxes or penalties.
- You received an assessment, audit notice, or demand letter.
- Your customers deducted WHT but you do not have credit notes.
- You are unsure whether your sales are VATable.
- Your turnover is close to or above the small company threshold.
- You have foreign customers, foreign vendors, imports, exports, or cross-border services.
- Your company changed year-end, ownership, structure, or business activity.
- You have payroll arrears, pension issues, or state tax questions.
Advice is cheaper before a filing mistake becomes a dispute.
Where Bukki Can Help
Bukki helps Nigerian businesses keep tax-ready records as transactions happen. You can record and categorise income and expenses, track invoices and payments, monitor VAT and WHT, reconcile bank activity, and generate reports your accountant can review.
Bukki does not replace professional tax judgment. It helps with the part many businesses struggle with most: keeping records clean enough that tax filing is based on reports, not guesswork.
Start with the current month. Record every sale, expense, invoice, payment, VAT amount, and WHT deduction properly. Once the current month is clean, work backwards through older months with your accountant.
Tax preparation becomes easier when your books explain the business before anyone asks.