Nigerian Tax Deadline Calendar (2026)

Missing a Nigerian tax deadline is expensive by design — the Nigeria Tax Administration Act 2025 backs every deduction-at-source deadline with a statutory penalty (10% per annum of the unremitted amount, plus interest at the Central Bank’s Monetary Policy Rate, on top of the tax itself). This calendar lists every recurring deadline that applies to individuals and businesses under the new tax law, and shows a live countdown to whichever one is coming up next for you — pick your filter above and the list re-sorts itself, soonest first.

The Two-Tier Remittance Deadline Most People Miss

Here’s the detail that trips up a lot of small-business owners: PAYE and individual-capacity withholding tax are due by the 10th of the following month, but VAT and company-capacity withholding tax are due by the 21st. It’s easy to assume one deadline covers everything you deduct or withhold — it doesn’t. If you’re a sole trader who both runs payroll and withholds tax on payments to your own vendors, you can genuinely have two different remittance deadlines in the same month for two different obligations.

What Happens If You Miss a Deadline?

The Nigeria Tax Administration Act 2025 sets out the penalty structure directly, and it’s steeper than a lot of people assume. Under Section 107, failing to remit tax you’ve already deducted, collected, or withheld — PAYE, WHT, VAT — by its due date makes you liable for the full unremitted amount, plus a 10% per annum administrative penalty, plus interest at the prevailing Central Bank Monetary Policy Rate, on top of the tax itself. Section 105 adds a separate 40% penalty on any amount you were supposed to deduct or withhold but simply didn’t. For companies specifically, Section 129 layers on a flat ₦10,000,000 (or the US Dollar equivalent) penalty for the first day of a missed remittance.

Pension is widely treated as the highest-stakes deadline of the group. Because pension contributions are deducted from an employee’s own pay rather than the employer’s money, payroll practitioners describe unremitted pension deductions as exposing an employer to more serious consequences under the Pension Reform Act than a typical tax penalty — separate from, and reportedly harsher than, the tax-specific administrative penalties above. (This calculator’s tax-specific penalty figures above come from a direct reading of the Nigeria Tax Administration Act’s text; the pension characterization here reflects payroll-practitioner commentary rather than this build’s own reading of the Pension Reform Act, so treat it as a strong signal to prioritize this deadline rather than a precise legal citation.)

Do You Actually Have Any of These Deadlines?

If you’re a pure salaried employee — one employer, tax deducted at source, no side income — none of these deadlines are yours to act on. Your employer remits your PAYE, pension, and (if applicable) NHF on your behalf; you don’t file anything. The moment that changes is the moment you earn income your employer doesn’t already tax for you — freelance work, rental income, a side business — at which point the 31 March Personal Income Tax self-assessment deadline becomes yours personally, on top of whatever your employer already handles.

Three Groups of Deadlines, Three Different Risks

Deduction-at-source taxes (PAYE, WHT, VAT) are money that never belonged to the business in the first place — it was collected or deducted from someone else’s payment on the government’s behalf. That’s why these carry the steepest, most immediate penalties: the government treats a late remittance here as holding onto tax money you were only ever a custodian of.

Payroll-adjacent statutory contributions (Pension, NHF, NSITF) aren’t Nigeria Tax Act obligations at all — they’re older, separate statutes (the Pension Reform Act, the National Housing Fund Act, the Employees’ Compensation Act) that happen to run on the same monthly payroll cycle as PAYE. They’re included here because anyone checking “what’s due this month” needs the whole picture, not just the tax half of it.

Annual filings (CIT + Development Levy, Form H1, Personal Income Tax self-assessment, ITF) are lower-frequency but higher-effort — they require an actual return, not just a remittance, and the 6-month CIT window in particular gives businesses real room to prepare compared to a monthly deadline’s short runway.

All 2026 Deadlines at a Glance

How the Countdown Is Calculated

For fixed-day-of-month deadlines (PAYE, VAT, WHT), this tool checks the previous, current, and next monthly cycle and shows whichever upcoming date is soonest — so early in a month, you’ll typically see last month’s-cycle deadline if it hasn’t passed yet, not this month’s. Annual deadlines (Form H1, Personal Income Tax self-assessment, ITF) roll forward to next year the day after they pass.

Two deadlines involve a genuine assumption, disclosed rather than hidden: Pension’s “7 working days of payday” assumes your payday falls on the last calendar day of the month (the most common convention) and counts only weekends as non-working days — a public holiday in the window will push your employer’s real deadline a day or two later than shown here. Companies Income Tax needs your company’s actual financial year-end, which you can set above (defaults to 31 December).

Frequently Asked Questions

This calendar models recurring statutory deadlines based on the sources cited in its build documentation. It does not model one-off, transaction-triggered deadlines (Capital Gains Tax, Stamp Duty), petroleum-sector-specific returns, or a Nigerian public-holiday calendar in its working-day calculations. Confirm exact dates with the Nigeria Revenue Service, your State IRS, or a qualified tax professional before relying on this for a filing you cannot afford to miss.