How to Calculate Salary Tax Step-by-Step

Last updated: December 26, 2025 | Author: FreelanceTaxPK Editorial Team

Calculating your income tax can seem complex, but with a step-by-step approach, it becomes straightforward. This guide walks you through the process with real examples, showing exactly how to calculate tax for different income levels.

Step 1: Determine Your Annual Taxable Income

Your taxable income is your gross annual salary minus any eligible deductions. Common deductions include:

• Zakat (if applicable)
• Medical expenses (subject to FBR limits)
• Charitable donations (subject to FBR limits)
• Other eligible deductions

Example: If your monthly salary is PKR 150,000:

• Gross Annual Income: PKR 150,000 × 12 = PKR 1,800,000
• Less: Deductions (e.g., PKR 50,000)
• Taxable Income: PKR 1,750,000

Step 2: Identify the Applicable Tax Slab

Find which tax bracket your taxable income falls into. For 2025-2026, the slabs are:

• Up to PKR 600,000: 0%
• PKR 600,001 - 1,200,000: 1% on excess over 600,000
• PKR 1,200,001 - 2,200,000: 11% on excess over 1,200,000 (Fixed: PKR 6,000)
• PKR 2,200,001 - 3,200,000: 23% on excess over 2,200,000 (Fixed: PKR 116,000)
• PKR 3,200,001 - 4,100,000: 30% on excess over 3,200,000 (Fixed: PKR 346,000)
• Above PKR 4,100,000: 35% on excess over 4,100,000 (Fixed: PKR 616,000)

Step 3: Calculate Tax Using the Progressive System

Progressive taxation means you calculate tax on each portion of income separately:

Example 1: Taxable Income of PKR 900,000

This falls in the second slab (PKR 600,001 to PKR 1,200,000).

1. First PKR 600,000: 0% tax = PKR 0
2. Excess over PKR 600,000: PKR 900,000 - PKR 600,000 = PKR 300,000
3. Tax on excess: PKR 300,000 × 1% = PKR 3,000
4. Total Tax: PKR 0 + PKR 3,000 = PKR 3,000

Example 2: Taxable Income of PKR 1,750,000

This falls in the third slab (PKR 1,200,001 to PKR 2,200,000).

1. Fixed tax from previous slabs: PKR 6,000
2. Excess over PKR 1,200,000: PKR 1,750,000 - PKR 1,200,000 = PKR 550,000
3. Tax on excess: PKR 550,000 × 11% = PKR 60,500
4. Total Tax: PKR 6,000 + PKR 60,500 = PKR 66,500

Example 3: Taxable Income of PKR 2,500,000

This falls in the fourth slab (PKR 2,200,001 to PKR 3,200,000).

1. Fixed tax from previous slabs: PKR 116,000
2. Excess over PKR 2,200,000: PKR 2,500,000 - PKR 2,200,000 = PKR 300,000
3. Tax on excess: PKR 300,000 × 23% = PKR 69,000
4. Total Tax: PKR 116,000 + PKR 69,000 = PKR 185,000

Step 4: Calculate Net Income

Once you have your total tax, subtract it from your taxable income to get net income:

Net Income = Taxable Income - Total Tax

Example: For PKR 1,750,000 taxable income:

• Taxable Income: PKR 1,750,000
• Total Tax: PKR 66,500
• Net Income: PKR 1,683,500

Step 5: Convert to Monthly Figures (if needed)

To find your monthly net income, divide annual net income by 12:

Monthly Net Income = Annual Net Income ÷ 12

Example: PKR 1,683,500 ÷ 12 = PKR 140,292 per month

Common Calculation Mistakes to Avoid

Mistake 1: Applying the Highest Rate to All Income

Wrong: If your income is PKR 1,500,000, you might think: PKR 1,500,000 × 11% = PKR 165,000

Correct: Only the portion above PKR 1,200,000 is taxed at 11%. The correct calculation is: PKR 6,000 (fixed) + (PKR 300,000 × 11%) = PKR 39,000

Mistake 2: Forgetting Fixed Tax Components

Always remember to include the fixed tax from previous slabs when calculating tax for higher brackets.

Mistake 3: Using Monthly Income Instead of Annual

Tax slabs are based on annual income. Always convert monthly salary to annual (multiply by 12) before calculating tax.

Using Our Calculator

While manual calculation helps you understand the process, you can use our free tax calculator for quick and accurate results. The calculator:

• Automatically applies the correct tax rates
• Handles monthly to annual conversions
• Shows detailed breakdown of calculations
• Calculates net income automatically

Frequently Asked Questions

What if I have multiple sources of income?

You need to combine all taxable income sources and calculate tax on the total. However, different income types may have different tax rates. Consult with a tax professional for complex situations.

How do I account for tax already deducted?

If your employer deducts tax at source (withholding tax), this is an advance payment. When filing your return, you'll reconcile the total tax paid vs. actual liability.

What if my calculations don't match my employer's deductions?

There could be several reasons: different deductions applied, different interpretation of tax rules, or errors. Review your payslip and consult with your employer's HR or a tax professional.

Conclusion

Calculating tax step-by-step helps you understand your tax liability and verify calculations. However, tax situations can be complex, and we recommend:

• Using our tax calculator for verification
• Consulting with a qualified tax advisor for personalized advice
• Verifying with FBR's official resources