New vs Old Tax Regime — Complete Guide 2026

The Two Regimes at a Glance

The old tax regime has been in place for decades. It features higher base tax rates but allows a wide range of deductions and exemptions — Section 80C, HRA exemption, home loan interest, Section 80D health insurance premiums, LTA, NPS contributions, and many more. Disciplined investors who maximise these can significantly reduce their taxable income.

The new tax regime (revised in Budget 2024) offers lower tax rates and a higher standard deduction of ₹75,000. However, most deductions are eliminated. From FY 2024-25 onwards, the new regime is the default — if you do not actively declare a preference to your employer, TDS will be deducted under the new regime.

Key Deductions Available Only in the Old Regime

• Section 80C (up to ₹1.5 lakh): ELSS, PPF, EPF, LIC, home loan principal, NSC, SSY, tuition fees.
• Section 80D (up to ₹25,000 + ₹50,000 for senior citizen parents): Health insurance premiums.
• HRA exemption: Significant for metro renters — can exempt 40–50% of basic salary from tax.
• Home loan interest — Section 24(b) (up to ₹2 lakh per year): Major benefit for home loan borrowers.
• LTA (Leave Travel Allowance): For domestic travel expenses twice in a 4-year block.
• Section 80CCD(1B): Additional ₹50,000 NPS contribution on top of the 80C limit.

What Stays in the New Regime

• Standard deduction of ₹75,000 (increased from ₹50,000 in Budget 2024).
• Employer's NPS contribution — Section 80CCD(2) — is NOT disallowed.
• Section 87A rebate: Total tax is zero if taxable income is ₹7 lakh or below.
• Basic exemption for notified allowances (transport allowance for specially-abled employees).

When the Old Regime Saves More

The old regime generally wins when your total deductions are substantial. If you are paying home loan EMIs and claiming Section 24(b) interest deduction (up to ₹2 lakh), maximising Section 80C through ELSS, PPF and EPF contributions (₹1.5 lakh), paying health insurance premiums (₹25,000+), and contributing to NPS (additional ₹50,000 under 80CCD(1B)), your total deductions can easily cross ₹3.75–4.5 lakh. At a salary of ₹10–15 lakh, these deductions can reduce your taxable income by 30–40%, making the old regime significantly cheaper despite its higher slab rates.

Metro city renters are another group who often benefit from the old regime — the HRA exemption on a ₹25,000–40,000 monthly rent in cities like Mumbai or Bengaluru can exempt ₹2–4 lakh from tax annually, which alone can tip the balance in favour of the old regime.

When the New Regime Saves More

The new regime is clearly better when your deductions are minimal. If you do not have a home loan, do not pay rent, have limited 80C investments, and no health insurance premium, the old regime offers you almost no benefit over and above the ₹50,000 standard deduction — while the new regime gives you ₹75,000 and lower slab rates.

For anyone with a taxable income of ₹7 lakh or below, the new regime is almost always better: the 87A rebate makes your entire tax liability zero, regardless of investments. Fresh graduates and early-career professionals with few deductions also typically benefit from the new regime's simpler, lower-rate structure.

How to Decide and How to Switch

Use the RupeeMath Income Tax Calculator to enter your exact gross salary and all applicable deductions. The calculator computes your tax liability under both regimes simultaneously and highlights which saves more. As a practical rule of thumb: if your total deductions beyond the standard deduction exceed ₹2.5–3 lakh, the old regime likely wins. If your deductions are below ₹1.5 lakh, the new regime is almost always better.

Switching: Salaried employees can switch between regimes every year by declaring their choice to their employer at the start of the financial year (April). If you do not declare, the new regime is applied automatically. Self-employed individuals and business owners can exercise this choice only once — think carefully before switching.