Most Nigerian employers never decide how many payroll periods in a year they will run. They inherit monthly pay from the first hire, keep it, and only think about it again when a casual worker asks to be paid weekly or a new accountant asks why December’s tax looks different. The number of pay periods affects tax calculation, pension timing, cash flow and the paperwork each cycle creates, so it is worth choosing deliberately.

This guide sets out the four common schedules, explains why 2026 and 2027 contain an extra pay date for some of them, and shows how the number of payroll periods in a year changes the PAYE you deduct.

How many payroll periods are there in a year?

There are four standard pay schedules, and each produces a fixed number of pay periods:

• Monthly: 12 payroll periods in a year, paid once a month, usually near the end.
• Semi-monthly: 24 payroll periods, paid twice a month on fixed dates such as the 15th and the last day.
• Bi-weekly: 26 payroll periods, paid every second week on the same weekday.
• Weekly: 52 payroll periods, paid every week on the same weekday.

Semi-monthly and bi-weekly are often confused. Semi-monthly pay follows calendar dates, so the pay day moves between weekdays. Bi-weekly pay follows a 14-day rhythm, so the weekday stays the same but the date moves.

To see how the schedule changes each payslip, take an employee earning ₦6,000,000 a year, paid entirely as basic, housing and transport, with no rent relief claimed. Under the 2026 PAYE bands, the annual tax is ₦783,600 and the employee’s 8% pension contribution is ₦480,000. Spread across each schedule, the figures look like this:

Annual pay, annual tax and annual pension are the same on every row. Only the size of each payment changes, and with it the number of times the business has to calculate, pay and record.

What Nigerian law says about pay frequency

The Labour Act sets a ceiling on the interval between payments rather than a single required number of payroll periods in a year. Section 15 says that where the pay period is longer than a month, wages must still become due and payable at intervals not exceeding one month. In practice that makes monthly pay the longest interval an employer can use without special permission.

We could not find a survey showing how Nigerian employers split between the four schedules, so any percentage you see quoted should be treated with caution. Practitioner experience points to monthly pay for salaried staff and weekly or daily pay for casual, site and factory workers, which fits the ceiling in the Act.

The 53-week problem in 2026 and 2027

The numbers above assume every year has exactly 52 weeks, so that weekly payroll gives 52 payroll periods in a year. A year has 52 weeks plus one day (two in a leap year), so some weekdays occur 53 times. That matters for any business that pays on a fixed weekday.

• 2026 begins on a Thursday, so a weekly payroll paid on Thursdays has 53 pay dates in 2026. A bi-weekly payroll whose first pay date is Thursday 1 January has 27 pay dates, ending on Thursday 31 December.
• 2027 begins on a Friday, so a weekly payroll paid on Fridays has 53 pay dates in 2027.

Monthly and semi-monthly payrolls never have this problem, which is one reason many employers prefer them. For weekly and bi-weekly payrolls, the extra pay date is a real extra payment, and it changes the tax maths.

Suppose the employee above is paid a weekly salary of ₦115,384.62 and receives 53 payments in 2026. Annual gross becomes ₦6,115,384.62, and the correct annual PAYE is ₦802,707.69. If the payroll team keeps deducting the standard weekly figure of ₦15,069.23, it will withhold ₦798,669.23 across 53 weeks and under-deduct by ₦4,038.46. In a 27-period bi-weekly year the same mistake leaves a shortfall of ₦8,076.92.

Under the new tax rules the employer carries the statutory responsibility for deducting PAYE correctly, so a shortfall created by a payroll calendar falls on the employer first. Setting a schedule that accounts for the extra pay date is far cheaper than finding the difference in January.

Annualised and cumulative PAYE: why the method matters

The number of payroll periods in a year feeds directly into how PAYE is calculated. There are two common methods:

1. Annualised. Multiply the period’s taxable pay by the number of periods, calculate tax on that annual figure, then divide by the number of periods. It is simple, but it assumes the employee earns the same amount every period for the whole year.
2. Cumulative. Calculate tax on total pay from the start of the year to the current period, then subtract the tax already deducted. It adjusts automatically when pay changes, when someone joins part-way through the year, or when a year has an extra pay date.

The difference shows up clearly with a mid-year joiner. An employee who joins on 1 July 2026 on ₦500,000 a month earns ₦3,000,000 by December. After 8% pension, taxable pay is ₦2,760,000, and the correct 2026 tax is ₦294,000, or ₦49,000 a month. An annualised calculation that treats ₦500,000 as a full-year salary deducts ₦65,300 a month, which totals ₦391,800 over six months and over-deducts ₦97,800. The employee would have to recover it by filing their own annual return.

We did not find published guidance from the Nigeria Revenue Service or from state revenue services that prescribes one method, so confirm the approach with your state tax office or adviser. The cumulative method with a year-end check is the safer default because it corrects itself.

Pension and PAYE deadlines depend on the schedule

Choosing more payroll periods in a year also multiplies the obligations attached to each one. PAYE is remitted monthly, by the 10th of the following month, so a weekly payroll still files one PAYE remittance per state each month. Pension is different. Contributions must reach the Pension Fund Custodian within seven working days of paying salaries, so a weekly payroll triggers a pension deadline every week.

That is a strong reason to keep salaried staff on monthly pay and reserve weekly pay for the workers who need it. Each extra pay run also means another payslip batch, another bank schedule, and another set of records to keep. Pension and NHF deductions explains what the pension remittance has to contain, and our guide to PAYE in Nigeria covers the monthly filing.

Fixing pay dates inside your payroll periods in a year

Once you have chosen a schedule, fix the pay date in writing, because staff plan rent, school fees and transport around it. Most monthly employers use the last working day or a set date such as the 28th. When that date falls on a weekend or public holiday, agree in advance whether you pay on the working day before or after, and stick to it.

December deserves its own note. Many Nigerian businesses pay salaries early to give staff time before Christmas, which can pull a January pay date into the previous tax year if the calendar is not checked. Because the employer annual return for 2026 is due by 31 January 2027, every pay date in your payroll periods in a year needs to be placed in the right year before the return is prepared. A one-page pay calendar for the whole year, with pension and PAYE deadlines marked, prevents most of these surprises.

How to choose your payroll periods in a year

Four questions usually settle the choice:

• Who are you paying? Salaried staff are normally paid monthly. Casual and site workers often need weekly pay to stay on the job.
• When does cash arrive? If most revenue arrives at month end, twelve payroll periods in a year match your cash flow. If you collect weekly, a weekly payroll is easier to fund.
• How much admin can you carry? Twelve cycles a year means twelve sets of calculations and remittances. Fifty-two means more than four times that.
• Do you have an extra pay date this year? If you pay weekly or bi-weekly, check your calendar now rather than in December.

Many Nigerian businesses run two schedules at once, monthly for office staff and weekly for casual workers. That works well when the system can calculate each group on its own calendar and combine the remittances.

If you are still learning how a single pay run fits together, start with our guide on how payroll works, then return here to decide how often to run it.