A practical decision framework to choose between the old and new income tax regimes for FY 2026-27. Includes break-even salary calculations, deduction checklists, a decision tree, and worked examples at multiple salary levels.
Every financial year, millions of salaried employees face the same question: should I choose the old tax regime or the new one? The wrong choice can cost you tens of thousands of rupees in unnecessary taxes. Yet most people either stick with the default (new regime) without thinking or follow generic advice that may not apply to their situation.
This guide gives you a concrete decision framework. No vague advice like "it depends on your deductions." Instead, we show you the exact break-even calculation, walk through a deduction checklist, and provide a decision tree that gives you a clear answer in under 10 minutes.
The fundamental difference between the two regimes
New Tax Regime (default from FY 2023-24 onwards): - Lower tax rates across all slabs - Very few deductions allowed (only standard deduction of Rs 75,000 and employer NPS under 80CCD(2)) - Income up to Rs 12 lakh is effectively tax-free (with Rs 75,000 standard deduction, gross salary up to Rs 12.75 lakh) - Simpler: no need to track investments or collect proofs
Old Tax Regime (optional, must be explicitly chosen): - Higher tax rates - All deductions available: 80C, 80D, 80CCD, HRA, LTA, Section 24 home loan interest, and more - Income up to Rs 5 lakh is effectively tax-free - Requires planning, investment tracking and proof submission
Tax slab comparison for FY 2026-27
| Income slab | New regime rate | Old regime rate |
|---|---|---|
| Up to Rs 2.5 lakh | 0% | 0% |
| Rs 2.5-4 lakh | 0% (new slab) | 5% |
| Rs 4-5 lakh | 5% | 5% |
| Rs 5-8 lakh | 5% | 20% |
| Rs 8-10 lakh | 10% | 20% |
| Rs 10-12 lakh | 10% | 30% |
| Rs 12-16 lakh | 15% | 30% |
| Rs 16-20 lakh | 20% | 30% |
| Rs 20-24 lakh | 25% | 30% |
| Above Rs 24 lakh | 30% | 30% |
The new regime has more slabs and lower rates, especially in the Rs 5 to Rs 15 lakh range. The old regime taxes everything above Rs 10 lakh at 30 percent, while the new regime reaches 30 percent only above Rs 24 lakh.
The break-even calculation
The key question is: at what level of deductions does the old regime become cheaper than the new regime?
For salaried employees, the break-even deduction amount (beyond the standard deduction) is approximately Rs 3.75 lakh to Rs 4.50 lakh, depending on your exact salary level.
If your total deductions under the old regime (excluding standard deduction, which is available in both regimes at different amounts) are above this range, the old regime saves you money. Below this range, the new regime is cheaper.
Here is a more precise break-even table:
| Gross salary (CTC approx.) | Old regime deductions needed to break even |
|---|---|
| Up to Rs 12.75 lakh | New regime wins (zero tax with rebate) |
| Rs 13-15 lakh | Rs 3.5 to Rs 4 lakh in deductions |
| Rs 15-20 lakh | Rs 3.75 to Rs 4.25 lakh in deductions |
| Rs 20-30 lakh | Rs 4 to Rs 4.5 lakh in deductions |
| Above Rs 30 lakh | Rs 4.25 to Rs 5 lakh in deductions |
Translation: If you earn Rs 18 lakh and your total old-regime deductions (80C + 80D + HRA + NPS + home loan interest) exceed Rs 4 lakh, the old regime is likely cheaper. If they are below Rs 4 lakh, stay with the new regime.
The deduction checklist: calculate your old regime benefit
Go through this checklist and add up the deductions you can actually claim (not aspirational, but actual):
Section 80C (max Rs 1,50,000) - [ ] EPF (employee contribution, check salary slip): Rs ______ - [ ] PPF contribution: Rs ______ - [ ] ELSS mutual fund investment: Rs ______ - [ ] Life insurance premium: Rs ______ - [ ] Children's tuition fees (up to 2 children): Rs ______ - [ ] Home loan principal repayment: Rs ______ - [ ] Five-year tax-saving FD: Rs ______ - [ ] Sukanya Samriddhi Account: Rs ______ Total 80C (capped at Rs 1,50,000): Rs ______
Section 80CCD(1B) - NPS - [ ] Additional NPS contribution (max Rs 50,000): Rs ______
Section 80D - Health Insurance - [ ] Self and family premium (max Rs 25,000): Rs ______ - [ ] Parents' premium (max Rs 25,000, or Rs 50,000 if senior citizen): Rs ______ Total 80D: Rs ______
HRA Exemption - [ ] HRA exempt amount (use the three-condition formula): Rs ______
Section 24 - Home Loan Interest - [ ] Interest paid on home loan for self-occupied property (max Rs 2,00,000): Rs ______
Other deductions - [ ] Section 80E education loan interest: Rs ______ - [ ] Section 80G donations: Rs ______ - [ ] Section 80TTA savings interest (max Rs 10,000): Rs ______
Grand total of all deductions: Rs ______
Now compare your grand total with the break-even figure for your salary level from the table above. If your total exceeds the break-even, the old regime is better. If not, the new regime wins.
Decision tree: which regime to choose
Follow this tree for a quick answer:
Question 1: Is your gross salary below Rs 12.75 lakh? - Yes: Choose the new regime (zero tax with rebate). Stop here. - No: Continue to Question 2.
Question 2: Do you have a home loan on a self-occupied property? - Yes: You likely have Rs 2 lakh in Section 24 interest deduction. Continue to Question 3. - No: Your maximum deduction potential is around Rs 2.5 to Rs 3 lakh (80C + 80D + NPS). The new regime is likely better unless you also have very high HRA. Use our income tax calculator to confirm. Consider stopping here with the new regime.
Question 3: Is your HRA exemption above Rs 1 lakh per year? - Yes: With home loan interest (Rs 2 lakh) + 80C (Rs 1.5 lakh) + HRA (Rs 1 lakh+) + 80D (Rs 25,000-50,000) + NPS (Rs 50,000), your total deductions likely exceed Rs 5 lakh. The old regime is almost certainly better. - No: Add up all your deductions. If the total exceeds the break-even for your salary level, choose the old regime. Otherwise, new regime.
Worked examples
Example 1: Amit, Rs 10 lakh salary, no home loan, no HRA claim
Amit earns Rs 10 lakh. He invests Rs 1.5 lakh in PPF and ELSS (80C), pays Rs 15,000 for health insurance (80D), and contributes Rs 30,000 to NPS (80CCD(1B)). He lives with parents and does not pay rent.
Total deductions: Rs 1,50,000 + Rs 15,000 + Rs 30,000 = Rs 1,95,000
Break-even for his salary: approximately Rs 3.5 lakh. His deductions (Rs 1.95 lakh) are well below. New regime is better. In fact, his gross salary of Rs 10 lakh minus the Rs 75,000 standard deduction gives taxable income of Rs 9.25 lakh under the new regime, resulting in very modest tax. Under the old regime, even with deductions, his tax would be higher.
Example 2: Priya, Rs 16 lakh salary, home loan, high HRA
Priya earns Rs 16 lakh. She has a home loan (Rs 2 lakh interest under Section 24), invests Rs 1.5 lakh in 80C, pays Rs 50,000 in health insurance (80D, self + parents), contributes Rs 50,000 to NPS, and claims Rs 1.5 lakh HRA exemption.
Total deductions: Rs 2,00,000 + Rs 1,50,000 + Rs 50,000 + Rs 50,000 + Rs 1,50,000 = Rs 6,00,000
Break-even for her salary: approximately Rs 4 lakh. Her deductions (Rs 6 lakh) far exceed the break-even. Old regime is better. She saves approximately Rs 30,000 to Rs 50,000 compared to the new regime.
Example 3: Rahul, Rs 25 lakh salary, maximum deductions
Rahul earns Rs 25 lakh. He has 80C (Rs 1.5 lakh), NPS (Rs 50,000), 80D (Rs 75,000 including parents as senior citizens), home loan interest (Rs 2 lakh), and HRA exemption of Rs 2 lakh.
Total deductions: Rs 1,50,000 + Rs 50,000 + Rs 75,000 + Rs 2,00,000 + Rs 2,00,000 = Rs 6,75,000
Break-even for his salary: approximately Rs 4.5 lakh. His deductions (Rs 6.75 lakh) exceed the break-even significantly. Old regime is better. The saving is approximately Rs 50,000 to Rs 80,000 per year.
Example 4: Neha, Rs 25 lakh salary, minimal deductions
Neha earns Rs 25 lakh. She lives with parents (no rent, no HRA claim), has no home loan, and invests only Rs 1.5 lakh in 80C. Health insurance is Rs 25,000.
Total deductions: Rs 1,50,000 + Rs 25,000 = Rs 1,75,000
Break-even: approximately Rs 4.5 lakh. Her deductions (Rs 1.75 lakh) are far below. New regime is better. She saves approximately Rs 70,000 to Rs 1 lakh by choosing the new regime.
How to switch between regimes
For salaried employees without business income: You can switch between regimes every year. The choice is made while filing your ITR. If you want the old regime, you must inform your employer at the start of the financial year so they adjust TDS accordingly. Otherwise, TDS is deducted as per the new regime by default.
For employees with business income: You can switch from the new regime to the old regime only once. After switching back to the old regime, you cannot return to the new regime again. This restriction applies only to those with business or professional income.
For a detailed analysis of the regime changes, see our guide on new tax regime FY 2026-27 and the comprehensive comparison in old vs new tax regime.
The bottom line
Stop guessing and start calculating. The answer depends on your specific deductions, not general rules. Use the checklist above, compare your total with the break-even figure, and run the numbers through our income tax calculator to see the exact difference.
General patterns: - Below Rs 12.75 lakh gross salary: new regime (zero tax) - Rs 12.75 to Rs 18 lakh without home loan: new regime usually wins - Rs 15 lakh and above with home loan plus full deductions: old regime usually wins - Above Rs 25 lakh with maximum deductions: old regime definitely wins - Above Rs 25 lakh without significant deductions: new regime wins
The five minutes you spend on this calculation can save you Rs 20,000 to Rs 1 lakh or more per year. Do it before every financial year begins.
Frequently asked questions
Which tax regime is better for a salary of Rs 12 lakh?
For a gross salary of Rs 12 lakh, the new tax regime is almost always better because income up to Rs 12 lakh is effectively tax-free with the Section 87A rebate. Under the old regime, you would still pay significant tax even with full deductions. Choose the new regime for zero tax liability.
Can I switch between old and new tax regime every year?
Yes, salaried employees without business income can switch between the old and new regime every year while filing their ITR. The choice is made during the filing process. Inform your employer at the start of the year if you want the old regime so TDS is adjusted correctly throughout the year.
What deductions are available under the new tax regime?
Under the new tax regime, only two deductions are available: the standard deduction of Rs 75,000 from salary income and the employer contribution to NPS under Section 80CCD(2) up to 10 percent of basic salary. All other deductions including 80C, 80D, HRA and home loan interest are not available.
At what salary level does the old regime become better?
The old regime typically becomes better above Rs 15 lakh salary when you have total deductions exceeding Rs 3.75 to Rs 4.5 lakh. This usually requires a combination of home loan interest, HRA exemption, full 80C investment, NPS contribution and health insurance premium.
How much deduction do I need for the old regime to save tax?
You need total deductions of approximately Rs 3.75 to Rs 4.50 lakh beyond the standard deduction for the old regime to break even with the new regime. The exact amount depends on your salary level. Below this threshold, the new regime's lower slab rates more than compensate for the deductions you lose.
Is the new tax regime the default for FY 2026-27?
Yes, the new tax regime is the default from FY 2023-24 onwards. Your employer deducts TDS based on the new regime unless you explicitly inform them that you want the old regime. You can still choose the old regime while filing your ITR, but you may need to pay or claim a refund for the TDS difference.
Should I invest in tax-saving instruments if I choose the new regime?
Under the new regime, tax-saving investments do not reduce your tax liability since most deductions are not allowed. However, instruments like PPF, NPS and ELSS are still good investments for wealth creation regardless of tax benefits. Invest based on the investment merit, not just the tax deduction.
Does the choice of tax regime affect my home loan decision?
Yes, if you choose the new regime, you lose the Section 24 deduction for home loan interest of up to Rs 2 lakh and the Section 80C deduction for principal repayment. This effectively increases the cost of your home loan. Factor this into your regime decision if you have or plan to take a home loan.