Introduction
Chioma just received her first payslip from her new job at a marketing agency in Lagos. Her gross salary was ₦150,000, but she only received ₦137,033 in her bank account. When she asked her HR manager about the difference, she was told it was "PAYE tax deduction." But Chioma had no idea how that amount was calculated or whether it was correct.
If you're like Chioma, you've probably wondered: How exactly does my employer calculate the tax deducted from my salary each month? This question keeps many Nigerian employees up at night, worried they might be paying too much—or worse, that errors could lead to tax problems later.
The good news is that calculating PAYE tax isn't as complicated as it seems. Once you understand the basic formula and Nigeria's progressive tax rates, you can verify your own deductions in just a few minutes. This guide will show you exactly how to do that.
What Is PAYE Tax?
PAYE stands for Pay As You Earn. It's not a separate tax—it's simply the method your employer uses to collect your Personal Income Tax directly from your salary before paying you.
Here's how it works: Instead of waiting until the end of the year to calculate and pay your full tax bill, your employer deducts a portion of your tax each month and sends it to your State Internal Revenue Service (SIRS) on your behalf. This system, established under Section 33 of the Personal Income Tax Act, makes tax payment easier for employees and ensures the government receives revenue throughout the year.
Important to know: Your employer doesn't keep this money. They're legally required to remit it to the tax authority within 10 days after deducting it from your salary. If they don't, they can face penalties—but that's their problem, not yours. You still get credit for the tax payment.
Understanding Nigeria's Progressive Tax System
Nigeria uses what's called a progressive tax system. This means different portions of your income are taxed at different rates—the more you earn, the higher the percentage you pay on the top portions of your income.
Think of it like climbing stairs. Each step (income bracket) has its own tax rate, and you only pay that rate on the money within that specific step.
Here's How Your Income Is Taxed:
• First ₦300,000 of taxable income: 7% tax • Next ₦300,000 (from ₦300,001 to ₦600,000): 11% tax • Next ₦500,000 (from ₦600,001 to ₦1,100,000): 15% tax • Next ₦500,000 (from ₦1,100,001 to ₦1,600,000): 19% tax • Next ₦1,600,000 (from ₦1,600,001 to ₦3,200,000): 21% tax • Above ₦3,200,000: 24% tax
Critical point: These rates apply to your taxable income, not your gross salary. Your taxable income is what's left after subtracting allowable reliefs—and that's where the Consolidated Relief Allowance becomes your best friend.
The Magic of Consolidated Relief Allowance (CRA)
The Consolidated Relief Allowance is the single most valuable tax relief available to Nigerian employees. It automatically reduces your taxable income, which means you pay less tax overall.
As of the Finance Act 2020, your CRA is calculated as whichever amount is higher:
Option A: 1% of your gross annual income
Option B: ₦200,000 + 20% of your gross annual income
The tax system automatically uses whichever option gives you the bigger relief.
Why This Matters:
Let's say you earn ₦150,000 monthly (₦1,800,000 annually):
Option A: 1% × ₦1,800,000 = ₦18,000
Option B: ₦200,000 + (20% × ₦1,800,000) = ₦200,000 + ₦360,000 = ₦560,000
You'd get ₦560,000 deducted from your gross income before calculating tax. That's a huge relief! It means instead of paying tax on ₦1,800,000, you only pay tax on ₦1,240,000.
Important: Your employer should automatically apply CRA when calculating your PAYE. If they don't, or if they use the wrong calculation, you're paying more tax than you should.
Step-by-Step: How to Calculate Your PAYE
Let's break down the exact process using a clear, six-step formula. Once you understand this, you can calculate PAYE for any salary level.
Step 1: Calculate Your Annual Gross Income
Add up all your income for the year. This includes:
• Basic salary • All allowances (housing, transport, meal, utility, etc.) • 13th month salary or bonuses • Any other employment income
Myth buster: Many Nigerians believe certain allowances are tax-free. In reality, almost all allowances are taxable unless the law specifically says otherwise. Transport allowance? Taxable. Housing allowance? Taxable. Meal allowance? Also taxable.
Formula: Monthly Gross Income × 12 = Annual Gross Income
Step 2: Calculate Your CRA
Use both CRA formulas and pick the higher amount:
• Calculate 1% of annual gross income • Calculate ₦200,000 + 20% of annual gross income • Use whichever is higher
Step 3: Determine Your Taxable Income
Formula: Annual Gross Income - CRA = Taxable Income
This is the amount you'll actually pay tax on.
Step 4: Apply the Progressive Tax Rates
Now comes the part where many people get confused. You'll apply the different tax rates to different portions of your taxable income, starting from the bottom bracket and working your way up.
Don't worry—we'll show you detailed examples shortly that make this crystal clear.
Step 5: Add Up Your Total Annual Tax
Sum all the tax from each bracket. This gives you your total annual tax liability.
Step 6: Calculate Monthly PAYE
Formula: Total Annual Tax ÷ 12 = Monthly PAYE Deduction
This is the amount that should be deducted from your monthly salary.
Real-Life Examples: See Exactly How It Works
Example 1: Chioma's Salary (₦150,000 Monthly)
Let's calculate the PAYE for Chioma from our opening story. She earns ₦150,000 per month with no additional allowances.
Step 1: Annual Gross Income ₦150,000 × 12 = ₦1,800,000
Step 2: Calculate CRA
Option A: 1% × ₦1,800,000 = ₦18,000
Option B: ₦200,000 + (20% × ₦1,800,000) = ₦200,000 + ₦360,000 = ₦560,000
CRA = ₦560,000 (we use the higher amount)
Step 3: Taxable Income ₦1,800,000 - ₦560,000 = ₦1,240,000
Step 4: Apply Tax Rates
Now we apply the progressive rates to ₦1,240,000:
• First ₦300,000 at 7% = ₦21,000
• Next ₦300,000 at 11% = ₦33,000
• Next ₦500,000 at 15% = ₦75,000
• Remaining ₦140,000 at 19% = ₦26,600
Step 5: Total Annual Tax ₦21,000 + ₦33,000 + ₦75,000 + ₦26,600 = ₦155,600
Step 6: Monthly PAYE ₦155,600 ÷ 12 = ₦12,967
Result: Chioma's monthly PAYE should be ₦12,967, giving her a net monthly pay of ₦137,033. Her effective tax rate is only 8.6%, even though her highest bracket is taxed at 19%.
Example 2: Adebayo's Mid-Level Salary (₦500,000 Monthly + ₦100,000 Housing Allowance)
Adebayo works as a senior accountant earning ₦500,000 basic salary plus ₦100,000 housing allowance monthly.
Step 1: Annual Gross Income
Basic Salary: ₦500,000 × 12 = ₦6,000,000 Housing Allowance: ₦100,000 × 12 = ₦1,200,000 Total: ₦7,200,000
Remember: Housing allowance is fully taxable in Nigeria.
Step 2: Calculate CRA
Option A: 1% × ₦7,200,000 = ₦72,000
Option B: ₦200,000 + (20% × ₦7,200,000) = ₦200,000 + ₦1,440,000 = ₦1,640,000
CRA = ₦1,640,000
Step 3: Taxable Income ₦7,200,000 - ₦1,640,000 = ₦5,560,000
Step 4: Apply Tax Rates
• First ₦300,000 at 7% = ₦21,000
• Next ₦300,000 at 11% = ₦33,000
• Next ₦500,000 at 15% = ₦75,000
• Next ₦500,000 at 19% = ₦95,000
• Next ₦1,600,000 at 21% = ₦336,000
• Remaining ₦2,360,000 at 24% = ₦566,400
Step 5: Total Annual Tax ₦21,000 + ₦33,000 + ₦75,000 + ₦95,000 + ₦336,000 + ₦566,400 = ₦1,126,400
Step 6: Monthly PAYE ₦1,126,400 ÷ 12 = ₦93,867
Result: Adebayo should have ₦93,867 deducted monthly, leaving him with ₦506,133 net pay. His effective tax rate is 15.6%.
Example 3: Fatima's Salary with Multiple Allowances (₦250,000 + Allowances)
Fatima earns ₦250,000 basic salary plus transport allowance (₦30,000), meal allowance (₦20,000), and utility allowance (₦25,000) monthly.
Step 1: Annual Gross Income
Basic: ₦250,000 × 12 = ₦3,000,000 Transport: ₦30,000 × 12 = ₦360,000 Meal: ₦20,000 × 12 = ₦240,000 Utility: ₦25,000 × 12 = ₦300,000
Total Annual Gross: ₦3,900,000
Step 2: Calculate CRA
Option A: 1% × ₦3,900,000 = ₦39,000
Option B: ₦200,000 + (20% × ₦3,900,000) = ₦200,000 + ₦780,000 = ₦980,000
CRA = ₦980,000
Step 3: Taxable Income ₦3,900,000 - ₦980,000 = ₦2,920,000
Step 4: Apply Tax Rates
• First ₦300,000 at 7% = ₦21,000
• Next ₦300,000 at 11% = ₦33,000
• Next ₦500,000 at 15% = ₦75,000
• Next ₦500,000 at 19% = ₦95,000
• Remaining ₦1,320,000 at 21% = ₦277,200
Step 5: Total Annual Tax ₦21,000 + ₦33,000 + ₦75,000 + ₦95,000 + ₦277,200 = ₦501,200
Step 6: Monthly PAYE ₦501,200 ÷ 12 = ₦41,767
Result: Despite her monthly gross of ₦325,000, Fatima only pays ₦41,767 in PAYE, thanks to CRA. Her net monthly pay is ₦283,233, and her effective tax rate is 12.9%.
What About 13th Month Salary and Bonuses?
Many Nigerian companies pay a 13th month salary or year-end bonus. Here's what you need to know about how this affects your PAYE:
The Rule: Your 13th month salary or bonus is added to your annual income and taxed as part of your total earnings for the year. It's not taxed separately at a different rate.
How It Works:
Let's say Emeka earns ₦200,000 monthly and receives a 13th month salary of ₦200,000 in December.
His calculation would be:
Regular annual income: ₦200,000 × 12 = ₦2,400,000 13th month: ₦200,000 Total annual income: ₦2,600,000
This total amount is then used to calculate his annual tax using the six-step process. His employer might:
• Option 1: Spread the total annual tax evenly across 12 months • Option 2: Deduct normal PAYE for 11 months, then deduct the balance in December when the bonus is paid
Either approach is acceptable as long as the total annual tax is correct.
How to Verify Your Employer Is Deducting Correct PAYE
Now that you understand the calculation, here's how to check if your employer is doing it right:
Step 1: Request Your Tax Computation
Every employer should be able to provide an annual tax computation showing:
• Your total gross income • The CRA deducted • Your taxable income • Tax calculated for each bracket • Total annual tax • Monthly PAYE amount
Ask your HR department for this document. They're required to prepare it.
Step 2: Verify the CRA Calculation
Check that your employer used the correct CRA formula. The most common error is using only 1% of gross income instead of the higher amount (₦200,000 + 20% of gross income).
If they got this wrong, you're paying significantly more tax than you should.
Step 3: Check the Progressive Rates
Using the tax brackets listed earlier, verify that each portion of your taxable income was taxed at the correct rate. Use a calculator to double-check the math.
Step 4: Confirm the Monthly Amount
Your monthly PAYE deduction should equal your total annual tax divided by 12 (or adjusted appropriately if you have bonuses).
Red Flags to Watch For:
• Monthly deduction is exactly the same percentage of gross salary every month (suggests flat rate calculation rather than progressive) • Very high deduction relative to salary (may indicate CRA wasn't applied) • Employer can't provide tax computation when requested • Deduction varies wildly month to month without explanation
What If Your Employer Made a Mistake?
Discovered your employer has been deducting too much PAYE? Here's what to do:
Step 1: Document the error with your calculations showing the correct amount.
Step 2: Meet with your HR or payroll department. Bring your calculations and politely point out the discrepancy.
Step 3: Request correction going forward. For past overpayments, ask them to adjust future months' deductions to balance it out.
Step 4: If the employer has already remitted the excess to the tax authority, you can file for a refund through your State Internal Revenue Service. You'll need:
• Corrected tax computation • Evidence of excess payment • Your Tax Identification Number (TIN)
Important: If your employer under-deducted, the employer faces primary liability for the shortfall. However, the tax authority may assess you for unpaid tax under PITA Section 81 if they cannot recover from the employer, though you would have recourse against the employer for their error.
Special Situations You Should Know About
Minimum Wage Earners
Under the Finance Act 2020, if you earn Nigeria's minimum wage (currently ₦30,000 monthly or ₦360,000 annually), you are completely exempt from Personal Income Tax. No PAYE should be deducted.
If you earn slightly above minimum wage, you still benefit from CRA, which significantly reduces your tax.
Multiple Jobs
If you work multiple jobs, each employer will deduct PAYE separately. However, you must file an annual tax return combining all income sources. You might get a refund if total PAYE deducted exceeds your actual liability on combined income, or you might owe additional tax.
Pension Contributions
Your mandatory employee pension contribution (8% of your monthly emoluments, with your employer contributing a minimum 10%, totaling 18% under the Pension Reform Act 2014) is deducted from your gross income before PAYE calculation. This provides additional tax relief beyond CRA.
So the actual formula is:
Gross Income - Pension Contribution - CRA = Taxable Income
Gross Salary vs. Basic Salary
Always use gross salary (basic + all allowances) for PAYE calculation, not just basic salary. Some employers incorrectly calculate tax on basic salary only—this is wrong and could get both you and the employer in trouble.
Understanding Your Payslip
Your monthly payslip should clearly show:
Earnings Section: • Basic Salary • All allowances (itemized) • Gross Pay (total of everything)
Deductions Section: • Pension (8% of monthly emoluments) • PAYE Tax • Any other deductions
Net Pay: Gross Pay minus all deductions
If your payslip doesn't break down PAYE clearly, or if it's bundled with other deductions, request a detailed breakdown from HR.
Key Takeaways
• PAYE is calculated annually, then spread across 12 months – Your employer should calculate your total annual tax liability and divide by 12 for monthly deductions
• CRA is your biggest tax relief – Always verify your employer is using the correct formula: the higher of 1% of gross income OR (₦200,000 + 20% of gross income)
• All allowances are generally taxable – Don't assume your housing, transport, or meal allowance is tax-free unless specifically exempted by law
• Progressive rates mean your effective tax rate is lower – Even high earners in the 24% bracket don't pay 24% on all their income, only on amounts above ₦3.2 million
• You can verify your PAYE calculation – Request your annual tax computation from your employer and use the six-step formula to double-check the math
What to Do Next
Ready to take control of your PAYE tax? Here are your action steps:
This Month:
• Pull out your most recent payslip and identify your gross monthly income (basic + all allowances) • Calculate your annual gross income by multiplying by 12 • Use the six-step formula in this guide to calculate what your PAYE should be • Compare your calculation with what's actually being deducted
If Numbers Don't Match:
• Request your official tax computation from HR • Schedule a meeting to discuss any discrepancies • Bring this guide and your calculations to the meeting • Request correction for future months
Every January:
• Request your annual tax computation for the previous year • Verify that CRA was correctly applied • Check that all PAYE deducted is reflected in the computation • Keep this document for your records
Before January 31st:
• Ensure your employer files your annual tax return (employer deadline under PITA Section 41) • Request confirmation that all PAYE deductions were remitted to your State IRS • This protects you if the employer didn't remit what they deducted
Smart Tax Move:
Create a simple spreadsheet tracking your monthly gross income, PAYE deductions, and running total for the year. This 5-minute monthly habit helps you spot errors immediately rather than discovering them at year-end.
Understanding your PAYE calculation isn't just about checking your employer's math—it's about being financially informed and ensuring you're not paying more tax than legally required. With the knowledge from this guide, you now have the power to verify your deductions and maximize your take-home pay legally and ethically.
Have questions about your specific situation? Keep records of your salary structure and calculations. If you notice persistent discrepancies, consider consulting with a tax professional for personalized guidance.