Choosing between the New Tax Regime (Section 115BAC) and the Old Tax Regime has become one of the most critical annual financial decisions for Indian salaried employees and self-employed professionals.
With the Union Budget expanding the standard deduction to ₹75,000 and broadening the tax slabs under the New Tax Regime, the New Regime is now the default tax regime in India. However, the Old Tax Regime remains optional and can still save lakhs of rupees for taxpayers with substantial deductions.
This guide provides a comprehensive, mathematical comparison of both tax regimes for Assessment Year (AY) 2026–27 (Financial Year 2025–26), including exact break-even calculations.
1. Income Tax Slab Comparison (AY 2026–27)
Here is how income is taxed under both frameworks for an individual under 60 years of age:
| Income Slab (₹) | New Tax Regime (Sec 115BAC) | Old Tax Regime |
|---|---|---|
| Up to ₹3,00,000 | Nil (0%) | Nil (0% up to ₹2.5L; 5% from ₹2.5L to ₹3L) |
| ₹3,00,001 to ₹7,00,000 | 5% | 5% (up to ₹5,00,000) |
| ₹5,00,001 to ₹10,00,000 | — | 20% |
| ₹7,00,001 to ₹10,00,000 | 10% | 20% |
| ₹10,00,001 to ₹12,00,000 | 15% | 30% |
| ₹12,00,001 to ₹15,00,000 | 20% | 30% |
| Above ₹15,00,000 | 30% | 30% |
Health & Education Cess: In both regimes, a mandatory 4% Health and Education Cess is added to the total income tax payable after rebate.
2. Key Differences in Deductions & Rebates
The fundamental difference lies in how deductions and rebates are handled:
Standard Deduction
- New Tax Regime: ₹75,000 flat deduction for salaried employees and pensioners.
- Old Tax Regime: ₹50,000 flat deduction for salaried employees.
Section 87A Tax Rebate (Zero Tax Limits)
- New Tax Regime: Full tax rebate applies if taxable income does not exceed ₹12,00,000. Because of the ₹75,000 standard deduction, a salaried employee earning up to ₹12,75,000 pays ₹0 (Zero) income tax under the revised slabs!
- Old Tax Regime: Section 87A rebate is capped at taxable income of ₹5,00,000. Taxpayers earning above ₹5 Lakh (after deductions) pay tax starting right from the 5% and 20% brackets.
Deductions Allowed vs Disallowed
| Deduction / Exemption | Old Tax Regime | New Tax Regime |
|---|---|---|
| Standard Deduction | ₹50,000 | ₹75,000 |
| Section 80C (PPF, ELSS, EPF, LIC) | Up to ₹1,50,000 | Not Allowed |
| Section 80CCD(1B) (NPS Tier-1) | Up to ₹50,000 | Not Allowed |
| Section 80D (Health Insurance) | ₹25,000 to ₹1,00,000 | Not Allowed |
| Section 10(13A) (HRA Exemption) | Allowed (Actual rent formula) | Not Allowed |
| Section 24(b) (Home Loan Interest) | Up to ₹2,00,000 (Self-occupied) | Not Allowed (Self-occupied) |
| Section 80E (Education Loan Interest) | Full interest for 8 years | Not Allowed |
| Employer NPS (Sec 80CCD(2)) | Allowed (up to 10% or 14% basic) | Allowed (up to 14% basic) |
3. The Break-Even Analysis: When Does the Old Regime Win?
The "break-even point" is the total amount of eligible exemptions and deductions you must claim in the Old Regime to equal the tax liability of the New Regime.
If your total deductions exceed this threshold, the Old Regime saves you more money. If your total deductions are below this threshold, the New Regime is superior.
| Annual CTC / Gross Income | Approximate Old Regime Break-Even Deduction | Recommendation |
|---|---|---|
| Up to ₹12,75,000 | Not Viable | Choose New Regime (Tax is ₹0 due to ₹75k standard deduction and ₹12L rebate) |
| ₹15,00,000 | ₹3,75,000 | New Regime if deductions < ₹3.75L; Old Regime if deductions > ₹3.75L |
| ₹20,00,000 | ₹4,00,000 | New Regime wins for most taxpayers unless paying heavy rent + home loan interest |
| ₹25,00,000 | ₹4,25,000 | New Regime generally superior unless claiming full 80C, 80D, HRA, and home loan |
| Above ₹30,00,000 | ₹4,50,000+ | New Regime offers lower slab progression (20% up to ₹15L vs 30% above ₹10L in Old) |
4. Real-World Case Studies
Case Study 1: Rohan (Age 28, Annual CTC: ₹14,00,000)
- Housing: Living with parents (No rent paid, no HRA claim).
- Deductions: Section 80C: ₹1,50,000 (EPF + ELSS); Section 80D: ₹15,000.
- Total Deductions in Old Regime: ₹1,65,000 + ₹50,000 = ₹2,15,000.
- Outcome: Total deductions (₹2.15L) are far below the ₹3.6L break-even mark. Under the New Regime, Rohan pays significantly lower tax and avoids the administrative burden of submitting proof documents.
Case Study 2: Priya (Age 36, Annual CTC: ₹22,00,000)
- Housing: Renting an apartment in Bengaluru (Annual rent ₹3,60,000; HRA Exemption: ₹2,10,000).
- Home Loan: Paying ₹1,80,000 interest on a self-occupied home under Section 24(b).
- Other Deductions: Section 80C: ₹1,50,000; Section 80D: ₹35,000.
- Total Deductions in Old Regime: ₹2,10,000 (HRA) + ₹1,80,000 (Home Loan) + ₹1,50,000 (80C) + ₹35,000 (80D) + ₹50,000 (Std Ded) = ₹6,25,000.
- Outcome: Because Priya's total deductions (₹6,25,000) far exceed the ₹4,00,000 break-even threshold, the Old Tax Regime saves Priya more than ₹65,000 in annual income tax!
5. Decision Flowchart: Which Regime Should You Pick?
Answer these 3 quick questions:
- Is your annual income under ₹12.75 Lakh?
→ Pick the New Tax Regime. You pay zero income tax with zero documentation.
- Do you pay substantial house rent (HRA) AND home loan interest?
→ Calculate your total deductions. If they cross ₹3.75 Lakh to ₹4.25 Lakh, the Old Tax Regime is typically better.
- Do you prefer financial simplicity and higher monthly cash flow?
→ The New Tax Regime eliminates the need to lock your capital into rigid 80C investments just to save tax.
You can simulate your exact take-home pay, tax liability, and cess under both regimes in seconds with WealthAura's free [Salary Calculator (AY 2026–27)](/salary-calculator) and check your rental tax deductions using our [HRA Exemption Calculator](/hra-calculator).