Old vs New Income Tax Regime in India: A Comprehensive Guide for FY27

Major Differences Between the Two Income Tax Slabs under the New & Old Regimes

The new regime prioritises simplicity and lower effective tax for middle-income earners by offering reduced rates, a higher exemption threshold, and minimal deductions. It applies uniformly to all individuals, with no age-based differentiation.

Income Tax Slab Rates for FY: 26-27 under New Tax Regime (NTR)

• On income up to ₹400000: Tax rate 0% ─ Nil (0%) ─ Exempted 
• On income from ₹400001 to 800000: Tax rate 5% ─ (0% on ₹400000 + 5% on the rest)
• On income from ₹800001 to 1200000: Tax rate 10% ─ (0% on ₹400000 + 5% on ₹399999 + 10% on the rest)
• On income from ₹1200001 to 1600000: Tax rate 15% ─ (0% on ₹400000 + 5% on ₹399999 + 10% on ₹399999 + 15% on the rest)
• On income from ₹1600001 to 2000000: Tax rate 20% ─ (0% on ₹400000 + 5% on ₹399999 + 10% on ₹399999 + 15% on ₹399999 + 20% on the rest)
• On income from ₹2000001 to 2400000: Tax rate 25% ─ (0% on ₹400000 + 5% on ₹399999 + 10% on ₹399999 + 15% on ₹399999 + 20% on ₹399999 + 25% on the rest)
• On income above ₹2400000: Tax rate 30% ─ (0% on ₹400000 + 5% on ₹399999 + 10% on ₹399999 + 15% on ₹399999 + 20% on ₹399999 + 25% on ₹399999 + 30% on the rest)

Basic Exemptions & Deductions Available under the New Tax Regime

• Rebate u/s 87A — Up to ₹60,000, making tax nil for total income up to ₹12 lakhs (automatic for all taxpayers)
• With a standard deduction of ₹75000, the effective tax-free limit for salaried individuals reaches ~₹12.75 lakhs (automatic for salaried persons and pensioners)
• Employer NPS contribution under 80 CCD (2) allowed ─ up to 14% of salary ─ may make a tax-free limit up to ₹13.00-13.70 lakhs (have to be claimed with documentary proof for salaried persons)
• Overall lower rates with minimal deductions – the New Tax Regime is now a preferred choice for most of the taxpayers, especially the younger generation with a median salary up to ₹12-15 lakhs

Income Tax Slab Rates for FY: 26-27 under Old Tax Regime (OTR)

Individuals below 60 years, including NRIs, HUFs, etc.

• On income up to ₹250000: Tax rate 0% ─ Nil (0%) ─ Exempted 
• On income from ₹250001 to 500000: Tax rate 5% ─ (0% on ₹250000 + 5% on the rest)
• On income from ₹500001 to 1000000: Tax rate 20% ─ (0% on ₹250000 + 5% on ₹249999 + 20% on the rest)
• On income above ₹1000000: Tax rate 30% ─ (0% on ₹250000 + 5% on ₹249999 + 20% on ₹499999 + 30% on rest)

Special Senior Citizen Relief — Only under the Old Tax Regime

• Senior Citizens (60–80 years): Basic exemption up to ₹3 lakh vs ₹2.50 lakh normal
• Super Senior Citizens (>80 years): Basic exemption up to ₹5 lakh vs ₹2.50 lakh normal
• The rest of the slabs and computation pattern are the same as above under OTR
   

Basic Exemptions & Deductions Available under the Old Tax Regime

• Rebate u/s 87A—₹12500 ─ Tax nil if total income ≤ ₹5.00 lakh (for all)
• Standard deduction of ₹50000, effective tax-free limit reaches ~₹5.50 lakhs (salaried pensioners).
• Section 80C (up to ₹1.5 lakh for investments like PPF, ELSS)
• 80D (health insurance) up to ₹75000-100000 (including family)
• HRA, home loan interest (up to ₹2 lakh under Section 24(b)), education loan interest, donations under 80G, etc.
• Surcharge: Up to 37% for very high incomes in certain cases.

Additional Deductions & Exemptions for Senior Citizens (available only under the Old Tax Regime)

• Section 80TTB (interest on deposits – FD, savings, RD): Still capped at ₹50,000 (unchanged since introduction in 2018; applies only in the Old Tax Regime, not the New Regime).
• Section 80D (health insurance premiums + preventive check-up + medical expenditure if uninsured): Up to ₹50,000 for senior citizens.

Overall, the Old Tax Regime has higher rates but also allows many exemptions & deductions and may be more suitable for higher annual incomes above ₹15 lakhs with heavy investments in various tax-saving instruments as mentioned above; otherwise, he may stick to the New Regime for almost Nil tax (up to ₹12.75-13.70 lakhs) without any heavy investment burden to save tax.

Standard Deduction (SD) & 87/A rebate under New and Old Tax Regime

NTR-New Tax Regime

• Initially, there was no Standard Deduction (SD) on salaried income in the NTR. But it was subsequently introduced in the Union Budget 2023 at ₹50000 and then increased to ₹75000 next year (Budget 2024). 
• Rebate u/s 87A: Up to ₹60000

OTR-Old Tax Regime

• In FY19, the SD was reintroduced in the OTR (after a long gap since 2005) at ₹40000 (replacing medical & transport allowances) ─ subsequently enhanced to ₹50000 from FY20, which was the last modification. 
• Although the SD for NTR was further increased to ₹75000 from FY25 to account for inflation, the SD for the OTR was left unchanged. 
• Rebate u/s 87A: Up to ₹12500

Other Important Notes/Differentiations Between the New and Old Tax Regime

• There were no major tweaks in the Old Tax Regime over the last five years. 
• Tax-Free Threshold (Basic Exemption + SD Only): NTR offers an effective ₹12.75 lakh for salaried/pensioners; OTR caps at an effective ₹5.50 lakh for salaried/pensioners.
• Rate Structure: NTR has more slabs for gradual ₹4 lakh progression; OTR has steeper jumps ─ 30% above ₹1000000 vs above ₹2400000
• Deductions Impact: If deductions exceed ₹3–4 lakh annually, the OTR often yields lower tax despite higher base rates.
• Compliance: NTR simplifies filing (pre-filled returns, fewer proofs); OTR requires documentation for claims.
• Surcharge & Cess: Similar structure, but NTR caps surcharge at 25%.
• Break-even Point: For most middle-income earners with minimal deductions, the new regime results in lower liability. High savers may save more under the old regime.

Effective Tax-Free Gross Salary under New Tax Regime (NTR) and Old Tax Regime (OTR)-An Estimate

A breakdown of the effective tax-free gross salary after all applicable deductions/exemptions under both regimes:

New Tax Regime: ₹12.75-13.70 Lakhs/Annum

• Base tax-free limit: Taxable income up to ₹12 lakh: Zero tax (due to enhanced Section 87A rebate of ₹60,000).
• Standard deduction: ₹75,000 (automatically available for salaried individuals/pensioners).
• Employer NPS contribution (Section 80CCD(2)): Fully deductible up to 14% of salary (Basic + DA) for all employees (private & government)—this is one of the few deductions retained in NTR.
• Effective tax-free gross salary range:
  • Without employer NPS: ≈ ₹12.75 lakh (₹12 lakh + ₹75,000 standard deduction).
  • With maximum employer NPS: Assuming realistic Basic + DA ~40–50% of gross salary, this can push the effective tax-free salary to ₹13.00–13.70 lakh or slightly higher, depending on salary structure (e.g., if Basic is 50% of CTC and employer contributes 14%, it adds ~₹0.70–1.00 lakh extra tax-free buffer in many cases).
• This makes NTR very attractive for salaried employees with employer NPS contributions — often ₹12.75–13.00 lakh (or up to ~₹13.70 lakh in optimised structures), gross salary can be completely tax-free.

Old Tax Regime

• Base tax-free limit: Taxable income up to ₹5 lakh ─ zero tax (Section 87A rebate up to ₹12,500).
• Standard deduction: ₹50,000 (automatically available for salaried individuals/pensioners)
• Other deductions/exemptions (can be claimed aggressively):
  • Section 80C: Up to ₹1.5 lakh (investments like PPF, ELSS, LIC, tuition/school fees of children, etc.).
  • Section 80D: Up to ₹75,000–₹1 lakh (health insurance for self/family + parents).
  • HRA exemption: Varies — up to 50% of basic salary, subject to actual rent paid and actual HRA received (often ₹2–4 lakh+ for mid-level salaries).
  • Home loan interest (self-occupied) – Section 24(b): Up to ₹2 lakh.
  • Additional NPS – Section 80CCD(1B): ₹50,000.
  • Employer NPS – Section 80CCD(2): Up to 10% of salary (lower than 14% under NTR).
  • Other: LTA, professional tax, education loan interest (no cap), donations, etc.
• Effective tax-free gross salary range:
  • Minimal deductions (only standard deduction): ≈ ₹5.5 lakh.
  • Realistic high deductions (typical salaried with HRA, 80C, 80D, and home loan): ₹7–10 lakh gross salary can often be tax-free.
• Maximum optimised scenario (high HRA in metros + full 80C + 80D + ₹2 lakh home loan interest + NPS + other): ₹10–12 lakh gross salary can become tax-free in strong cases (rarely exceeds this without very high rent/basic or multiple loans).
• ₹7–12 lakh is a realistic range for many salaried taxpayers under OTR with good planning, but ₹12+ lakh tax-free is uncommon unless HRA/home loan components are exceptionally high.

In brief, the OTR may be more suitable for someone with a higher salary bracket along with a heavy investing profile; otherwise, the NTR may be more suitable, especially for the new younger generation. ─ Heavy spending habits over investing. Two income tax regimes differ fundamentally in philosophy: the New Tax Regime (NTR) emphasises lower rates and simplicity while pushing discretionary spending, the basic requirement of a vibrant economy, but the Old Tax Regime (OTR) rewards savings and investments, which are also vital for a resilient economy. Thus, the government wants to keep both in a balanced & prudent way.

Conclusion

The New Tax Regime (NTR) is increasing in popularity vs the Old Tax Regime (OTR) due to simplicity and no big burden of 'forced savings’ to save tax. The Government also wants tax revenue at the end of the day and thus also promotes the NTR. And even under OTR, an investment-savvy salaried person may have a tax-free gross salary of around ₹7.00-12.00 lakhs vs ₹12.75-13.70 lakhs after considering all the potential exemptions & deductions. But without so much investment and wealth-creation effort, a salaried person can have a primary tax-free annual gross salary of up to ₹5.50 lakhs and ₹12.75 lakhs (87A rebate + Standard Deduction) under the OTR and NTR. So, the NTR is getting increasing popularity. But even after that, the Old Tax Regime continues to offer value for those with substantial deductions—particularly in metros/Tier-I/II cities, etc., where generous HRA exemptions and home loan benefits can make it competitive. However, its relevance is now niche-specific.