Section 139(9) of Income Tax Act: Defective Return and How to Respond?
Old Tax Regime vs New Tax Regime
Last Updated: 11th December 2025 - 02:47 pm
The Union Budget 2025 has introduced significant changes to India's income tax structure, aiming to simplify taxation and provide relief to taxpayers. With the revised income tax slabs and increased standard deductions under the new tax regime, taxpayers face a very important decision of choosing between the old tax regime and the new tax regime. This guide offers a detailed comparison to help you make an informed choice.
Understanding the Old Tax Regime
The old tax regime has been the traditional taxation system in India, characterized by:
- Multiple Tax Slabs: Progressive tax rates based on income levels.
- Deductions and Exemptions: Taxpayers can reduce taxable income through various deductions and exemptions.
Key Features:
- Section 80C Deductions: Up to ₹1.5 lakh for investments in instruments like Public Provident Fund (PPF), Employee Provident Fund (EPF), National Savings Certificate (NSC), and Life Insurance Premiums.
- House Rent Allowance (HRA): Exemption for salaried individuals paying rent.
- Standard Deduction: ₹50,000 for salaried taxpayers.
- Other Deductions: Under sections like 80D (medical insurance), 80E (education loan interest), and 24(b) (home loan interest).
Advantages:
- Tax Savings: Through various deductions and exemptions.
- Encourages Savings and Investments: By providing tax benefits on specific financial instruments.
Disadvantages:
- Complexity: Requires meticulous record-keeping and understanding of various provisions.
- Limited Flexibility: Tax benefits are tied to specific investments and expenditures.
Exploring the New Tax Regime
Introduced in the Union Budget 2020, the new tax regime aims to simplify taxation by:
- Lower Tax Rates: Reduced rates across income slabs.
- No Deductions or Exemptions: Eliminates the need for documentation and investment in specific instruments.
Key Features Post Budget 2025:
Revised Income Tax Slabs:
| Income Range (₹) | Tax Rate (%) |
| Up to 4,00,000 | Nil |
| 4,00,001 to 8,00,000 | 5 |
| 8,00,001 to 12,00,000 | 10 |
| 12,00,001 to 16,00,000 | 15 |
| 16,00,001 to 20,00,000 | 20 |
| 20,00,001 to 24,00,000 | 25 |
| Above 24,00,000 | 30 |
Standard Deduction: Increased to ₹75,000 for salaried individuals.
Advantages:
- Simplicity: Straightforward structure without the need for investment proofs.
- Immediate Tax Relief: Lower tax rates without mandatory investments.
- No Taxes upto Rs. 12 Lakh: Income earned upto Rs. 12,00,000 will have zero tax liability.
Disadvantages:
- No Tax Benefits on Investments: Deductions under sections like 80C, 80D are not available.
- Potential Higher Tax Liability: For those with significant deductions under the old regime.
Comparative Analysis: Old vs. New Tax Regime
To determine which regime suits you best, consider the following scenarios:
1. Taxpayer with Minimal Investments and Deductions
- Income: ₹10,00,000
- Deductions: ₹50,000 (Standard Deduction)
Old Tax Regime:
- Taxable Income: ₹9,50,000
- Tax Calculation:
- Up to ₹2,50,000: Nil
- ₹2,50,001 to ₹5,00,000: 5% = ₹12,500
- ₹5,00,001 to ₹10,00,000: 20% = ₹90,000
- Total Tax: ₹1,02,500
New Tax Regime:
- Taxable Income: ₹9,25,000 (after ₹75,000 standard deduction)
- Tax Calculation:
- Up to ₹4,00,000: Nil
- ₹4,00,001 to ₹8,00,000: 5% = ₹20,000
- ₹8,00,001 to ₹9,25,000: 10% = ₹12,500
- Total Tax: ₹32,500
Conclusion: In this scenario, the new tax regime offers a tax saving of ₹70,000.
2. Taxpayer with Significant Investments and Deductions
- Income: ₹15,00,000
- Deductions: ₹2,50,000 (including ₹1,50,000 under Section 80C, ₹50,000 standard deduction, ₹50,000 under Section 80D)
Old Tax Regime:
- Taxable Income: ₹12,50,000
- Tax Calculation:
- Up to ₹2,50,000: Nil
- ₹2,50,001 to ₹5,00,000: 5% = ₹12,500
- ₹5,00,001 to ₹10,00,000: 20% = ₹1,00,000
- ₹10,00,001 to ₹12,50,000: 30% = ₹75,000
- Total Tax: ₹1,87,500
New Tax Regime:
- Taxable Income: ₹14,25,000 (after ₹75,000 standard deduction)
- Tax Calculation:
- Up to ₹4,00,000: Nil
- ₹4,00,001 to ₹8,00,000: 5% = ₹20,000
- ₹8,00,001 to ₹12,00,000: 10% = ₹40,000
- ₹12,00,001 to ₹14,25,000: 15% = ₹33,750
- Total Tax: ₹93,750
Conclusion: In this case, the new tax regime results in a tax saving of ₹93,750.
Factors to Consider When Choosing Between the Two Regimes
- Investment Habits: If you regularly invest in tax-saving instruments, the old regime might be more beneficial.
- Loan Repayments: Home loan interest deductions are available only under the old regime.
- Simplicity Preference: If you prefer a hassle-free process without tracking multiple investments, the new regime offers simplicity.
- Income Level: Higher income earners with fewer deductions might benefit more from the new regime's lower tax rates.
Which Tax Regime Should You Choose: Old Tax Regime or New Tax Regime?
If you invest heavily in tax-saving instruments and claim multiple deductions, the old tax regime may still be beneficial for you.
If you prefer simpler tax calculations with lower tax rates and no need to track deductions, the new tax regime is the better choice.
Salaried employees with moderate income and limited deductions may find the new tax regime more beneficial.
High-income earners with significant home loan interest payments or large tax-saving investments may still benefit from the old tax regime.
Conclusion
With the government setting the new tax regime as the default, it's essential to evaluate your financial situation before filing your income tax returns. Use tax calculators, assess your investment habits, and consult a tax professional if needed.
Ultimately, choosing between the old tax regime and new tax regime should be based on which one provides maximum tax savings and aligns with your financial goals.
Frequently Asked Questions
Which tax regime is better – old or new?
Can I switch between the old and new tax regimes?
Is the new tax regime mandatory for all taxpayers?
Which tax regime is better for salaried employees?
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