Choosing the wrong tax regime can cost you thousands of rupees every year. This comprehensive guide compares the old and new tax regimes in detail, with break-even calculations and real examples for FY 2025-26.
Step 1: Understand the Core Difference#
The two regimes differ in one fundamental way:
| Aspect | Old Regime | New Regime (Default) |
|---|---|---|
| Tax rates | Higher slabs | Lower slabs |
| Deductions | 70+ deductions available | Only a handful allowed |
| Standard deduction | ₹50,000 | ₹75,000 |
| Complexity | Higher | Simpler |
| Best for | Heavy investors, high HRA | Low-investment earners |
Think of it this way:
- Old regime = Pay higher rates, but earn exemptions/deductions that shrink taxable income
- New regime = Pay lower rates, but on almost the full income
Step 2: Compare Tax Slabs Side by Side#
Old Regime Slabs (FY 2025-26)#
| Income Slab | Tax Rate |
|---|---|
| Up to ₹2,50,000 | Nil |
| ₹2,50,001 – ₹5,00,000 | 5% |
| ₹5,00,001 – ₹10,00,000 | 20% |
| Above ₹10,00,000 | 30% |
Surcharge applies on income above ₹50 lakh.
New Regime Slabs (FY 2025-26)#
| Income Slab | Tax Rate |
|---|---|
| Up to ₹4,00,000 | Nil |
| ₹4,00,001 – ₹8,00,000 | 5% |
| ₹8,00,001 – ₹12,00,000 | 10% |
| ₹12,00,001 – ₹16,00,000 | 15% |
| ₹16,00,001 – ₹20,00,000 | 20% |
| ₹20,00,001 – ₹24,00,000 | 25% |
| Above ₹24,00,000 | 30% |
Special benefit: Tax rebate u/s 87A makes income up to ₹12 lakh effectively tax-free under the new regime.
Step 3: Know What Deductions Each Regime Allows#
Deductions NOT Available in New Regime#
| Deduction | Amount |
|---|---|
| Section 80C (PPF, ELSS, EPF, etc.) | Up to ₹1,50,000 |
| Section 80D (health insurance) | Up to ₹25,000–₹1,00,000 |
| House Rent Allowance (HRA) exemption | Varies (city, rent) |
| Home Loan Interest — self-occupied (24b) | Up to ₹2,00,000 |
| Leave Travel Allowance (LTA) | Varies |
| Standard Deduction (old regime: ₹50K) | Extra ₹25K only in new |
| Section 80E (education loan interest) | Full interest |
| Section 80G (donations) | Varies |
| Professional tax | ₹2,500 |
Deductions AVAILABLE in New Regime#
✅ These still apply:
- Standard deduction: ₹75,000 (salaried/pensioners)
- NPS employer contribution (80CCD-2): Up to 10% of salary
- Gratuity and leave encashment exemptions
- Interest on housing loan for let-out property
- Conveyance allowance (specially-abled employees)
NPS employer contribution (80CCD-2) is the most valuable deduction available in the new regime. If your employer contributes to NPS, make sure it's reflected correctly.
Step 4: Break-Even Analysis by Salary Level#
The break-even point is where tax payable is equal under both regimes. Above the break-even deduction level, old regime wins. Below it, new regime wins.
₹10 Lakh Salary — Break-Even#
| Scenario | Old Regime Tax | New Regime Tax |
|---|---|---|
| No deductions | ₹1,12,500 | ₹60,000 |
| Deductions = ₹1,50,000 (just 80C) | ₹82,500 | ₹60,000 |
| Deductions = ₹3,00,000 (80C + HRA + 80D) | ₹52,500 | ₹60,000 |
Break-even at ₹10L salary: When deductions ≈ ₹2.5 lakh, both regimes give equal tax. More deductions → old regime wins.
₹15 Lakh Salary — Break-Even#
| Scenario | Old Regime Tax | New Regime Tax |
|---|---|---|
| No deductions | ₹2,62,500 | ₹1,25,250 |
| Deductions = ₹3,00,000 | ₹1,72,500 | ₹1,25,250 |
| Deductions = ₹5,00,000 | ₹82,500 | ₹1,25,250 |
Break-even at ₹15L salary: When deductions ≈ ₹3.8 lakh, regimes equalize.
₹25 Lakh Salary — Break-Even#
| Scenario | Old Regime Tax | New Regime Tax |
|---|---|---|
| No deductions | ₹5,62,500 | ₹3,75,000 |
| Deductions = ₹4,00,000 | ₹4,42,500 | ₹3,75,000 |
| Deductions = ₹6,00,000 | ₹3,22,500 | ₹3,75,000 |
Break-even at ₹25L salary: When deductions ≈ ₹4.5 lakh, regimes equalize.
Calculate your personal break-even →
Free online calculator
Step 5: Make Your Decision#
Choose the New Regime If...#
✅ Your income is up to ₹12 lakh (effectively zero tax after rebate) ✅ You have minimal investments — EPF only, no ELSS, minimal insurance ✅ You don't pay rent (or get negligible HRA) ✅ You have no home loan ✅ You're young and not maximizing 80C investments yet ✅ You want simplicity — no receipt tracking, no proofs to submit
Choose the Old Regime If...#
✅ You're paying significant rent and receive good HRA ✅ You've maximized 80C (₹1.5L) + NPS (₹50K additional) ✅ You have a home loan with high interest (₹2L deduction under 24b) ✅ You pay health insurance for family + senior parents (80D up to ₹1L) ✅ Total deductions exceed the break-even threshold for your salary level ✅ Your income is above ₹25 lakh with significant investment-linked deductions
Quick rule of thumb: If your total eligible deductions exceed 25–30% of your gross salary, the old regime is likely better. Below that threshold, the new regime usually wins.
Switching Between Regimes#
For Salaried Employees#
- Declare your regime to your employer at the start of the financial year (Form 10IEA for old regime, or default to new)
- You can change your regime when filing ITR, even if you declared differently to employer
- You can switch every year
For Business Income Earners#
- If you have business or professional income, you can opt in/out of the new regime
- But: Once you opt out of the new regime to the old regime with business income, you can only switch back once in a lifetime
- This restriction applies only to those with business income; salaried individuals can switch freely
Common Questions#
Should I opt out of the new regime with my employer even if I'm unsure? If unsure, declare new regime to your employer (it's the default anyway). At the time of filing, you can recalculate and choose old regime if it's more beneficial.
Does the regime choice affect my EPF contributions? No. EPF is mandatory and deducted regardless. But the tax benefit (80C deduction) is only available in the old regime.
My employer says I can only choose once per year — is that right? Yes, for TDS purposes, your employer applies your chosen regime throughout the year. But you can still change when filing your ITR, and the difference will be claimed as a refund or paid as additional tax.
Will the government change regimes again in Budget 2026? Possible. Budget 2025 already enhanced the new regime significantly. Monitor announcements, but for FY 2025-26, file under the regime most beneficial to you now.