Look at your payslip. There’s a number there called “PAYE” that’s usually the biggest deduction from your salary. Most people glance at it, sigh, and move on. But here’s the thing: that number isn’t magic. It’s math. And once you understand the math, you can check whether it’s right.

The 2026 reforms made this calculation simpler than it’s ever been. The old Consolidated Relief Allowance—that confusing mix of percentages within percentages—is gone. What’s left is a straightforward system with a flat tax-free threshold and clear progressive rates.

Let’s walk through it step by step, with real numbers, so you can calculate exactly what should be coming off your salary each month.

What You Need Before You Start

Grab your payslip or have these figures handy:

• Your gross monthly salary (before any deductions)
• Any bonuses or commissions you’ve received in the year
• Your annual rent (if you want to claim rent relief)
• Proof of NHIS or NHF contributions (if applicable)
• A calculator (or just paper and patience)

The calculation works on an annual basis, then splits into monthly deductions. So even if you’re checking a single month, we need to think in yearly terms. This annual approach matters because of how personal income tax in Nigeria is structured for employees with fluctuating income.

Step 1: Calculate Your Gross Annual Income

Start with what you earn in a full year. If your salary is consistent, multiply your monthly pay by 12. If you’ve received bonuses or commissions in the past year, add them in.

Example:
– Monthly salary: ₦250,000
– Annual bonus: ₦500,000
– Gross annual income: (₦250,000 × 12) + ₦500,000 = ₦3,500,000

This is your starting point. Everything else flows from here. If you receive irregular payments like overtime or performance bonuses, understanding income tax for private sector employees helps you track what should be deducted.

Step 2: Apply the ₦800,000 Tax-Free Threshold

This is the biggest change in 2026. Under Finance Act 2026, Section 3(2), the first ₦800,000 of your annual income is completely tax-free. No calculations, no reliefs, no paperwork. It’s simply yours.

Subtract ₦800,000 from your gross annual income.

Continuing the example:
– Gross annual income: ₦3,500,000
– Minus ₦800,000 threshold = ₦2,700,000

This ₦2,700,000 is your chargeable income before reliefs.

Step 3: Deduct Eligible Reliefs

Rent Relief

If you pay rent and have a valid tenancy agreement with proof of payment, you can deduct 20% of your annual rent, up to a maximum of ₦500,000. This is established in NRS Circular 2026-05, Paragraph 4.2.

Example with rent:
– Annual rent: ₦1,200,000
– Rent relief: 20% × ₦1,200,000 = ₦240,000 (within the ₦500,000 limit)
– Chargeable income after rent relief: ₦2,700,000 – ₦240,000 = ₦2,460,000

Other Allowable Deductions

Beyond rent relief, employees can also claim deductions for National Health Insurance Scheme (NHIS) contributions and National Housing Fund (NHF) contributions. These must be properly evidenced and documented.

To claim any relief, employees must submit Form A to their employer, who then passes it to the State Internal Revenue Service by January 31 for verification. Valid proof means having the documents needed for income tax filing, including a signed tenancy agreement, NHIS receipts, and bank statements showing payments.

Step 4: Apply the Progressive Tax Rates

Now take your chargeable income and apply the 2026 tax bands. These are set out in Finance Act 2026, Section 3(3):

Annual Taxable Income Bracket	Tax Rate
First ₦800,000	0%
Next ₦2,200,000	15%
Next ₦9,000,000	18%
Next ₦13,000,000	21%
Next ₦25,000,000	23%
Above ₦50,000,000	25%

Source: National Assembly Library Trust Funds

Notice that the first ₦800,000 is already at 0%—that’s your threshold from Step 2. The bands above apply to the remaining income. For a visual breakdown, the current income tax rates in Nigeria table shows how each band applies to different income levels.

For our example (₦2,460,000 chargeable income):

• First band (0%): Already accounted for in the threshold
• Second band (15% on next ₦2,200,000): ₦2,200,000 × 15% = ₦330,000
• Remaining income: ₦2,460,000 – ₦2,200,000 = ₦260,000
• Third band (18% on remaining ₦260,000): ₦260,000 × 18% = ₦46,800

Annual tax payable: ₦330,000 + ₦46,800 = ₦376,800

Step 5: Calculate Your Monthly PAYE Deduction

Divide your annual tax by 12 to get your monthly PAYE deduction.

Monthly PAYE: ₦376,800 ÷ 12 = ₦31,400

Net monthly salary: ₦250,000 – ₦31,400 = ₦218,600

This is what should hit your bank account each month, assuming your salary is consistent and you’ve claimed all eligible reliefs.

What Happens After Your Tax Is Deducted

Once your employer deducts PAYE from your salary, they’re required by law to remit it to your State Internal Revenue Service (SIRS)—not the Nigeria Revenue Service (NRS), which handles federal taxes. This remittance must occur by the 10th of every month under Finance Act 2026, Section 47.

Additionally, employers must file annual PAYE returns summarizing every employee’s pay and tax. While the federal deadline is January 31, some states grant extensions—for example, Edo State extended its 2026 deadline to February 14, 2026 to help employers navigate the new reforms. Always check with your specific State Internal Revenue Service.

If your employer misses these deadlines, they face significant penalties—but your tax credit remains valid as long as you have your payslips. The employer penalties for PAYE non-compliance article explains what happens when employers fail to meet these deadlines.

If You Have Additional Income

Even if you’re a salaried employee, you must file an annual personal income tax return if you have income from other sources—rental income, freelance work, business profits, or investments.

The deadline for individual filings is March 31 each year. Failure to file attracts a penalty of ₦100,000 in the first month and ₦50,000 for each subsequent month.

Upon full compliance, you’ll receive a Tax Clearance Certificate (TCC)—proof that your tax affairs are in order, often required for land transactions, visas, and government contracts. The tax clearance certificate explained guide covers how to obtain one.

Complete Examples Across Income Levels

Let’s run through three more scenarios so you can see how the calculation scales.

Example 1: Entry Level (₦80,000 monthly / ₦960,000 annually)

• Gross annual: ₦960,000
• Minus ₦800,000 threshold: ₦160,000 chargeable
• Rent relief: None claimed
• Tax calculation: ₦160,000 × 15% = ₦24,000 annual tax
• Monthly PAYE: ₦24,000 ÷ 12 = ₦2,000
• Net monthly: ₦80,000 – ₦2,000 = ₦78,000

Example 2: Mid-Level with Rent (₦400,000 monthly / ₦4.8 million annually, ₦1.5 million rent)

• Gross annual: ₦4,800,000
• Minus ₦800,000 threshold: ₦4,000,000
• Rent relief: 20% × ₦1,500,000 = ₦300,000
• Chargeable: ₦4,000,000 – ₦300,000 = ₦3,700,000
• Tax: ₦2,200,000 × 15% = ₦330,000
• Remaining: ₦1,500,000 × 18% = ₦270,000
• Annual tax: ₦600,000
• Monthly PAYE: ₦50,000
• Net monthly: ₦400,000 – ₦50,000 = ₦350,000

Example 3: Senior Level (₦1.5 million monthly / ₦18 million annually, ₦3 million rent)

• Gross annual: ₦18,000,000
• Minus ₦800,000 threshold: ₦17,200,000
• Rent relief: Maximum ₦500,000 claimed
• Chargeable: ₦16,700,000
• Tax: ₦2,200,000 × 15% = ₦330,000
• Next: ₦9,000,000 × 18% = ₦1,620,000
• Remaining: ₦5,500,000 × 21% = ₦1,155,000
• Annual tax: ₦3,105,000
• Monthly PAYE: ₦258,750
• Net monthly: ₦1,500,000 – ₦258,750 = ₦1,241,250

What If Your Income Varies Month to Month?

Not everyone has a fixed salary. If you’re in sales, work on commissions, or do freelance work alongside employment, the calculation gets trickier.

For variable income, your employer should:

1. Track your cumulative earnings throughout the year
2. Apply the tax bands progressively as your income grows
3. Adjust monthly deductions so you don’t overpay or underpay by year-end

This is called the cumulative basis of taxation. It ensures that by December, you’ve paid exactly the right amount based on your total annual income, even if some months were higher or lower. If you have more than one income stream, understanding income tax when working for multiple employers becomes essential.

Common Calculation Errors to Watch For

Even with the simpler 2026 system, mistakes happen. Here’s what to check:

1. Wrong Threshold Applied

Some payroll systems still use old figures. Verify that your employer is using ₦800,000 as the tax-free threshold, not an older number.

2. Missed Rent Relief

If you submitted your rent documents but your payslip doesn’t show the deduction, follow up. Rent relief is your right under NRS Circular 2026-05, not a favour.

3. Bonus Miscalculation

Bonuses should be added to your monthly income and taxed at your marginal rate—the rate that applies to your highest band. Some employers tax bonuses at a flat rate, which can be wrong.

4. Cumulative Errors

If your income varies, check that your employer is using the cumulative system. Some calculate each month in isolation, which leads to over-withholding.

If you spot an error, don’t assume it will fix itself—you need to know how to correct wrong tax deductions in Nigeria before the problem compounds.

Why Your Payslip Might Not Match Your Calculation

Sometimes your calculation is right but your payslip shows something different. Possible reasons:

• Pension contributions: These are deducted before tax, reducing your taxable income
• Other reliefs: NHIS, NHF contributions, life insurance premiums, or other allowable deductions
• Arrears or advances: Payments for previous months or advances on future pay
• Tax code issues: Your employer may have you on the wrong tax basis

Your payslip should show your gross pay, taxable pay (after reliefs), and the PAYE deducted. If these don’t align with your calculation, ask questions. Learning understanding your PAYE tax slip helps you read every line correctly.

What About Multiple Employers?

If you work more than one job, the calculation changes. One employer (your principal employer) applies the ₦800,000 threshold and basic rates. The other employer(s) must deduct tax at the highest marginal rate (usually 25%) without applying reliefs.

At year-end, you’ll need to file a self-assessment to consolidate everything. If too much was deducted, you get a refund. If too little, you pay the balance. This is why knowing income tax for contract staff vs permanent staff matters for your specific situation.

When to Get Help

You can calculate PAYE yourself with these steps. But sometimes it’s worth getting professional help:

• You have multiple income sources
• You receive significant bonuses or commissions
• You’re claiming multiple reliefs
• You’ve changed jobs mid-year
• You suspect your employer is calculating incorrectly

Tax consultants charge fees, but they’re often less than the cost of overpaying for years without knowing it.

The Bottom Line

PAYE calculation in 2026 is simpler than it’s ever been:

1. Start with gross annual income
2. Subtract ₦800,000
3. Subtract eligible reliefs (rent, NHIS, NHF)
4. Apply progressive rates to what’s left
5. Divide by 12 for monthly deduction

That’s it. No more CRA formulas, no confusing percentages on percentages. Just clear, progressive taxation.

Check your payslip against this calculation. If it matches, great. If it doesn’t, ask why. The money leaving your account is yours until the law takes it. Make sure it’s taking the right amount.

External references:
– For official confirmation of your state’s PAYE requirements and Form A submission, consult the  Revenue Service PAYE guidelines.
– Details on eligible deductions and reliefs are available in the Nigeria Revenue Service official publications.
– Information on filing deadlines and Tax Clearance Certificates can be found in the Federal Ministry of Finance tax guidelines.