Old vs New Tax Regime: The Definitive Comparison for FY 2026-27

The Big Question Every Taxpayer Faces

Every financial year, millions of taxpayers grapple with the same question: Should I stick with the old regime or switch to the new one? With the Income Tax Act, 2025 now in effect and the new regime as the default under Section 202 (formerly 115BAC), this decision is more important — and more nuanced — than ever.

🔴 Latest Update — September 2026

• FAST-DS Scheme: Taxpayers with undisclosed foreign assets/income can regularise until 31 December 2026 at 60% effective rate (30% tax + 30% penalty) for assets up to ₹1 crore, or flat ₹1 lakh fee for already-taxed or non-resident-acquired assets up to ₹5 crore.
• Finance Act, 2026 Amendments: The Income-tax Act, 2025 has already been amended with effect from April 1, 2026 — always verify section references against the latest text.
• New Income-tax Rules, 2026: Notified on March 20, 2026, with just 333 rules and 190 forms (down from 511 rules and 399 forms under the 1962 Rules). Second tranche of statutory forms rolled out on June 30, 2026.
• Form ITR-BN Introduced: New form for return filing in search and requisition cases (Income-tax (Third Amendment) Rules, 2026, notified July 27, 2026).

New Tax Regime Slabs for FY 2026-27 Under Section 202

Section 156 Rebate (formerly 87A): Up to ₹60,000 — making income up to ₹12 lakh effectively tax-free.
Standard Deduction: ₹75,000 for salaried individuals — so income up to ₹12.75 lakh is zero-tax.

What’s Allowed in the New Regime?

• ✅ Standard Deduction of ₹75,000
• ✅ Employer’s NPS contribution (Sec 124(2), formerly 80CCD(2)) up to 14% of salary
• ✅ Family pension deduction up to ₹25,000
• ❌ HRA exemption
• ❌ Section 123 (formerly 80C) – LIC, PPF, ELSS, etc.
• ❌ Section 126 (formerly 80D) – Health Insurance Premium
• ❌ Home loan interest (Sec 22(1)(b), formerly 24b) for self-occupied property
• ❌ LTA, professional tax, and most other exemptions

When the Old Regime Still Wins

The old regime may be better if you have heavy deductions:

• Section 123 (80C) investments exceeding ₹1.5 lakh
• HRA exemption on high rent in metro cities
• Home loan interest on self-occupied property under Section 22(1)(b)
• Health insurance premiums for family including senior citizen parents under Section 126

Quick Decision Framework

Updated Allowance Limits (New IT Rules 2026)

These exemptions are available under the old regime only:

Special Consideration: FAST-DS for Foreign Assets

If you have undisclosed foreign assets (bank accounts, investments, property):

• Deadline: 31 December 2026
• Small taxpayers (≤₹1 crore): 60% effective rate (30% tax + 30% penalty)
• Already-taxed/NR-acquired (≤₹5 crore): Flat ₹1 lakh fee
• Benefit: Immunity from further tax, penalty, and prosecution under Black Money Act, 2015

Action Checklist

1. 📊 Calculate tax under both regimes — use actual numbers, not estimates
2. 💰 Factor in standard deduction — ₹75,000 makes new regime more attractive
3. 🏦 Review Section 123, 126, 22, HRA — total these for old regime comparison
4. 🌍 Check foreign assets — consider FAST-DS before 31 Dec 2026
5. 📄 File ITR on time under Section 52 — avoid losing refund eligibility

Not sure which regime saves you more? Book a free consultation with SmartAITax — our AI calculator compares both regimes for your exact salary structure in seconds.