One of the most common questions we receive at KitnaTax is: “Should I go with the old tax regime or the new one?” The honest answer is — it depends on your income level, your deductions, and your financial behaviour. There is no universal right answer. But there is a right answer for you, and this article will help you find it.

The new tax regime, introduced by the Finance Act, 2020 and significantly restructured by the Finance Act, 2023, is now the default regime under Section 115BAC of the Income Tax Act, 1961. You must actively opt for the old regime if you wish to use it.

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Key Change for FY 2025-26 The new regime is the default. If you do not make any choice while filing, you will automatically be assessed under the new tax regime. To claim deductions like 80C, HRA, or home loan interest, you must specifically opt for the old regime.

Tax Slab Comparison — FY 2025-26

🏛️ Old Regime
More deductions, higher slabs
VS
✨ New Regime
Lower slabs, fewer deductions
Income SlabRate
Up to ₹2.5 lakhNil
₹2.5L – ₹5L5%
₹5L – ₹10L20%
Above ₹10L30%
Rebate u/s 87A up to ₹5L income₹12,500
Income SlabRate
Up to ₹4 lakhNil
₹4L – ₹8L5%
₹8L – ₹12L10%
₹12L – ₹16L15%
₹16L – ₹20L20%
₹20L – ₹24L25%
Above ₹24L30%
Rebate u/s 87A up to ₹12L incomeFull Tax
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Big Win in New Regime for FY 2025-26 The Section 87A rebate under the new regime has been enhanced — individuals with net taxable income up to ₹12 lakh pay zero tax (after rebate). This is a major benefit for the middle-income group. Standard deduction of ₹75,000 is also available in the new regime for salaried individuals, making the effective nil-tax limit ₹12.75 lakh.

Deductions — What You Can and Cannot Claim

This is the crux of the entire decision. The old regime allows a wide array of deductions; the new regime eliminates most of them in exchange for lower tax rates.

Deduction / Exemption 🏛️ Old Regime ✨ New Regime
Standard Deduction (Salaried)✅ ₹50,000✅ ₹75,000
Section 80C (PPF, ELSS, LIC etc.)✅ Up to ₹1.5 lakh❌ Not available
Section 80D (Health Insurance)✅ Up to ₹25,000–₹50,000❌ Not available
HRA Exemption (House Rent)✅ As per formula❌ Not available
Home Loan Interest (Section 24b)✅ Up to ₹2 lakh❌ Not available (let-out property allowed)
LTA (Leave Travel Allowance)✅ Exempt as per rules❌ Not available
Section 80CCD(1B) — NPS✅ ₹50,000 extra❌ Not available
Employer NPS contribution (80CCD(2))✅ Up to 14% of salary✅ Up to 14% of salary
Section 87A RebateUp to ₹5L income✅ Up to ₹12L income (zero tax)
Section 80G (Donations)✅ Available❌ Not available
Section 80TTA/80TTB (Interest)✅ Up to ₹10,000–₹50,000❌ Not available

Real Examples — Who Saves More?

Numbers make the choice clearer than theory. Here are three realistic scenarios calculated by our CA team:

📊 Example 1 — Salary ₹8 Lakh per Annum · Moderate Deductions
🏛️ Old Regime
Gross Salary₹8,00,000
Standard Deduction– ₹50,000
80C (PPF, LIC)– ₹1,50,000
80D (Health Ins.)– ₹25,000
Taxable Income₹5,75,000
Tax + Cess₹23,400
Tax Payable₹23,400
✨ New Regime
Gross Salary₹8,00,000
Standard Deduction– ₹75,000
No other deductions
  
Taxable Income₹7,25,000
Tax + Cess₹46,800
Tax Payable₹46,800
↑ ₹23,400 more than Old Regime
📊 Example 2 — Salary ₹12 Lakh per Annum · High Deductions
🏛️ Old Regime
Gross Salary₹12,00,000
Standard Deduction– ₹50,000
HRA Exemption– ₹1,80,000
80C– ₹1,50,000
80D– ₹25,000
Taxable Income₹7,95,000
Tax + Cess₹75,036
Tax Payable₹75,036
✅ Saves ₹7,956 vs New
✨ New Regime
Gross Salary₹12,00,000
Standard Deduction– ₹75,000
No other deductions
  
  
Taxable Income₹11,25,000
Tax + Cess₹82,992
Tax Payable₹82,992
📊 Example 3 — Salary ₹15 Lakh per Annum · Minimal Deductions
🏛️ Old Regime
Gross Salary₹15,00,000
Standard Deduction– ₹50,000
80C only– ₹1,50,000
No other deductions
  
Taxable Income₹13,00,000
Tax + Cess₹1,95,000
Tax Payable₹1,95,000
✨ New Regime
Gross Salary₹15,00,000
Standard Deduction– ₹75,000
No other deductions
  
  
Taxable Income₹14,25,000
Tax + Cess₹1,56,000
Tax Payable₹1,56,000
✅ Saves ₹39,000 vs Old

Who Should Choose Which Regime?

🏛️ Old Regime is Better If…

  • You pay rent and claim HRA
  • You invest ₹1.5L+ under 80C
  • You have a home loan (Section 24b)
  • You pay health insurance premiums
  • You invest in NPS (80CCD(1B))
  • Total deductions exceed ₹3–4 lakh

✨ New Regime is Better If…

  • Income is up to ₹12.75 lakh (zero tax)
  • You have minimal investments/deductions
  • You are a first-time earner or fresher
  • You don’t pay rent or have a home loan
  • You want simpler, hassle-free filing
  • Income above ₹15L with few deductions
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For Business Owners — Special Rule If you have business or professional income (filing ITR-3 or ITR-4), once you opt out of the new regime and go back to the old regime, you can only switch back to the new regime once in a lifetime. Salaried individuals face no such restriction and can switch freely every year.

The ₹3.75 Lakh Deduction Threshold

Our CA team has worked out a simple rule of thumb: if your total eligible deductions (beyond the standard deduction) exceed approximately ₹3.75 lakh, the old regime generally saves more tax at salary levels between ₹10–20 lakh. Below this threshold, the new regime typically wins.

However, this is a general guideline — the actual crossover point varies based on your exact income slab and the composition of deductions. This is exactly why KitnaTax computes both regimes for every single client before filing.

Let a CA Compare Both Regimes for You

Don’t guess. Our CA will compute your exact tax under both regimes and file under whichever saves you more — guaranteed.

View Plans & Start Filing →
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KitnaTax CA Team
Qualified Chartered Accountants · ICAI Members
All tax calculations in this article are based on the Finance Act, 2025 and Income Tax Act, 1961. Actual tax liability may vary based on individual circumstances. Consult a qualified CA for personalised advice.