New vs Old Tax Regime: How to Compare Them

India's income tax system currently offers two choices — the new regime and the old regime. Picking the wrong one can cost you thousands of rupees in excess tax every year. The good news is that the comparison is mechanical: list your deductions, compute tax under both, and pick the lower number.

Why This Decision Matters

The difference between the two regimes can be significant. For someone with a gross income of ₹15 lakh and substantial deductions, the tax liability under the old regime could be ₹30,000–₹50,000 lower than under the new regime. Conversely, someone with few deductions might pay less under the new regime.

Since FY 2023-24, the new regime has been the default — meaning your employer will compute TDS using the new regime unless you explicitly opt for the old one.

The New Tax Regime (FY 2026-27)

The new regime offers lower slab rates and a simpler structure, but removes most deductions.

Tax slabs under the new regime (FY 2026-27):

Key features:

• ₹75,000 standard deduction is available (increased from ₹50,000 in the Union Budget 2024)
• Section 87A rebate applies — if your net taxable income is ₹12 lakh or below, your tax liability becomes nil under this regime
• Most other deductions and exemptions — 80C, HRA, 80D, NPS — are not available
• Cess of 4% applies on the computed tax

The Old Tax Regime

The old regime has higher slab rates but allows a wide range of deductions that can significantly reduce your taxable income.

Tax slabs under the old regime:

Key deductions available:

• Section 80C — up to ₹1,50,000 (EPF, PPF, ELSS, life insurance premium, tuition fees, home loan principal)
• HRA exemption — based on actual rent paid, salary, and city of residence
• Section 80D — up to ₹25,000 for health insurance premiums (₹50,000 if the insured is a senior citizen)
• NPS (Section 80CCD(1B)) — additional ₹50,000 over and above the 80C limit
• Home loan interest (Section 24b) — up to ₹2,00,000 per year for self-occupied property
• LTA (Leave Travel Allowance) — tax-free for qualifying travel expenses
• Standard deduction — ₹50,000

Who Tends to Benefit from the New Regime

The new regime is generally advantageous when:

• Your total eligible deductions are relatively small — for instance, if you do not pay rent, have no home loan, and make minimal 80C investments beyond EPF
• Your gross income is ₹12 lakh or below — the 87A rebate makes your tax zero
• You prefer simplicity and do not want to maintain documentation for multiple deductions
• You are self-employed with a straightforward income structure

Who May Benefit from the Old Regime

The old regime can result in lower tax when your deductions are substantial:

• You pay significant rent in a metro city and claim a large HRA exemption
• You have a home loan with an annual interest outgo above ₹1.5–2 lakh
• You contribute actively to NPS and claim the additional ₹50,000 deduction under 80CCD(1B)
• You have dependant parents covered under health insurance and claim ₹50,000 under 80D
• Your combined deductions comfortably exceed ₹3.75 lakh — at that level, the math often tips in favour of the old regime for those in the 30% bracket

Note: The breakeven deduction amount varies by income level and cannot be stated as a single universal figure. Always compute both tax amounts for your specific numbers.

Step-by-Step: How to Compare

1. List your gross income — salary, bonus, other income
2. List every deduction you genuinely qualify for — HRA (compute the actual exempt amount, not just rent paid), 80C investments made, 80D premiums, home loan interest, NPS contributions
3. Compute old regime tax: Subtract all deductions from gross income, apply old slab rates, add cess
4. Compute new regime tax: Subtract only ₹75,000 standard deduction, apply new slab rates, apply 87A rebate if applicable, add cess
5. Compare the two numbers. Choose the regime with the lower tax liability.

A tax calculator that does both computations side by side can save time and reduce arithmetic errors.

Practical Notes for Salaried Employees

• You must inform your employer of your regime choice at the beginning of the financial year — this determines how TDS is deducted from your salary throughout the year
• If you do not inform your employer, TDS will be computed under the new regime by default
• You can switch regimes when filing your ITR — but only if you do not have business income. Salaried individuals have this flexibility; those with business income face restrictions on switching
• Switching between regimes does not carry any penalty — it is a legitimate annual decision

Common Mistakes

• Assuming the new regime is always better: For those with large HRA, home loans, and 80C investments, the old regime frequently wins.
• Forgetting to count HRA: Many employees pay significant rent but do not compute the actual HRA exemption — they simply assume it is not worth claiming.
• Overlooking 80D and NPS: Health insurance premiums and NPS contributions are real deductions that reduce your taxable income, not just financial planning tools.
• Not reassessing every year: Major life changes — buying a home, starting to pay rent, having a child, adding a dependent parent to health insurance — can shift which regime is more beneficial.

A Simple Way to Decide

If your total eligible deductions (HRA exemption + 80C + 80D + NPS + home loan interest) comfortably exceed ₹3.5–4 lakh, run the old regime numbers carefully before defaulting to the new regime. If your deductions are minimal, the new regime's simpler structure and lower rates — combined with the ₹12L zero-tax benefit — make it the likely winner.

The only way to be certain is to compute both.