Table of contents
The core idea: find your break-even deduction amount
The new regime offers lower slab rates but strips out most deductions and exemptions. The old regime keeps higher slab rates but allows deductions (Section 80C, 80D, HRA, home loan interest, standard deduction, etc.). The decision reduces to one question: do your total eligible deductions exceed the break-even amount for your income slab?
Worked example framework
| Step | Old regime | New regime |
|---|---|---|
| Gross taxable income | ₹12,00,000 | ₹12,00,000 |
| Deductions claimed (80C, 80D, HRA, std. deduction, etc.) | ₹3,50,000 | ₹75,000 (standard deduction only) |
| Net taxable income | ₹8,50,000 | ₹11,25,000 |
| Tax payable (illustrative slabs) | ₹82,500 | ₹78,750 |
In this illustration the two regimes land close together — meaning the deduction total is near the break-even point. Small changes to actual eligible deductions can flip the answer, which is exactly why this needs to be calculated with real numbers, not assumed.
Deductions available only under the old regime
| Deduction | Typical use |
|---|---|
| Section 80C | ELSS, PPF, EPF, life insurance premium, principal repayment on home loan |
| Section 80D | Health insurance premiums (self, family, parents) |
| HRA exemption | Salaried individuals paying rent |
| Home loan interest (Section 24b) | Interest paid on a home loan for a self-occupied property |
| Standard deduction | Available under both regimes, but confirm current-year amount for each |
Step-by-step decision process
- List every deduction you’re actually eligible for and would actually claim (not a theoretical maximum).
- Compute net taxable income and tax payable under both regimes using current slab rates.
- Factor in the effort cost — the old regime requires maintaining proof of investments/rent receipts; the new regime is simpler to file.
- Re-run this calculation whenever your income, rent, or investment pattern changes materially — the “right” regime can change year to year.
Bottom line
There is no universal answer — only a calculation. Run your actual numbers through both regimes annually rather than relying on generic “regime X is better” advice, since the correct choice is a function of your specific deductions relative to your income.
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