Zero-Tax Income up to ₹12.75 Lakh in 2026: New Tax Regime Guide

Key Takeaways

• Default Regime: For the Financial Year 2025-26 (Assessment Year 2026-27), the New Tax Regime under Section 115BAC of the Income Tax Act, 1961, is the default option for all individual taxpayers.
• Zero-Tax Income Limit: Under the New Tax Regime, a resident individual with a taxable income of up to ₹12 lakh will have zero tax liability due to an enhanced tax rebate under Section 87A. For salaried individuals, this effectively means no tax on income up to ₹12.75 lakh because of the standard deduction.
• Major Exemptions Forgone: The primary trade-off for the lower rates in the New Regime is the forfeiture of most common deductions and exemptions, including those under Section 80C (PPF, ELSS, Life Insurance), 80D (Health Insurance), and House Rent Allowance (HRA).
• Option to Switch: Taxpayers can opt out of the default New Regime and switch to the Old Regime. Salaried individuals can make this choice annually, while those with business income face certain restrictions after switching.

PART 1: EXECUTIVE SUMMARY

(Word Count: 198)

This guide provides a professional compliance overview of the dual tax regime system applicable for the Financial Year 2025-26, with a specific focus on the mechanics of achieving zero tax liability. The analysis centers on the provisions of the Income Tax Act, 1961, as the framework for a proposed Direct Tax Code 2025 has not been enacted.

• The Old Law (1961 Regime): The traditional tax system, now optional, allows taxpayers to claim a wide array of deductions and exemptions, such as those for investments under Section 80C, health insurance premiums under 80D, HRA, and interest on housing loans. It features a basic exemption limit of ₹2.5 lakh for individuals below 60 and offers a tax rebate under Section 87A, making income up to ₹5 lakh effectively tax-free.

• The New Law (Default 2025 Regime): Effective from FY 2023-24, the New Tax Regime under section 115BAC is the default system. For FY 2025-26, it offers lower, more graduated tax slab rates. Its cornerstone is a significantly enhanced rebate under Section 87A, which eliminates tax liability for individuals with a taxable income up to ₹12 lakh. However, this comes at the cost of forgoing over 70 common tax exemptions and deductions.

• Who is Impacted: This dual-regime system impacts all individual taxpayers. The New Regime is particularly beneficial for those with lower-to-moderate incomes who do not make substantial tax-saving investments. Conversely, taxpayers who fully utilize deductions for home loans, insurance, and investments may find the Old Regime more advantageous. The choice requires a careful calculation based on individual income and investment profiles.

PART 2: DETAILED TAX ANALYSIS

1. The Regime Transition Context

The Indian direct tax system has moved towards a simplified, concessional tax structure, now established as the Default Tax Regime under Section 115BAC of the Income Tax Act, 1961. This transition aims to offer lower tax rates to taxpayers who are willing to forgo most of the available exemptions and deductions. The traditional regime, with its plethora of tax-saving avenues, remains available as an Optional Scheme.

The government's intent is to make tax compliance simpler and reduce litigation. For the Financial Year 2025-26 (Assessment Year 2026-27), every individual, HUF, AOP, and BOI will be automatically assessed under the New Regime unless they explicitly opt for the Old Regime. This marks a significant shift from previous years where the Old Regime was the default.

2. Detailed Comparison: Old Scheme vs Default 2025 Scheme

A taxpayer's decision must be informed by a precise comparison of what each regime offers. Below is a detailed breakdown:

3. Break-Even Mathematical Analysis

The central attraction of the New Regime for FY 2025-26 is the zero-tax liability on income up to ₹12 lakh. This is achieved through the interplay of tax slabs and the Section 87A rebate.

Mathematical Proof of Zero-Tax on ₹12.75 Lakh Salary:

Let's analyze the case for a salaried individual with a gross salary of ₹12,75,000.

1. Gross Salary: ₹12,75,000
2. Less: Standard Deduction (New Regime): ₹75,000
3. Net Taxable Income: ₹12,00,000

Now, we compute the tax on this income using the New Regime slabs:

• On the first ₹4,00,000: Nil
• From ₹4,00,001 to ₹8,00,000 (i.e., on ₹4,00,000): 5% = ₹20,000
• From ₹8,00,001 to ₹12,00,000 (i.e., on ₹4,00,000): 10% = ₹40,000

4. Total Tax Before Rebate: ₹20,000 + ₹40,000 = ₹60,000
5. Less: Rebate under Section 87A: Since the taxable income (₹12 lakh) does not exceed the threshold, a rebate equal to the amount of tax or ₹60,000, whichever is less, is available. In this case, the rebate is ₹60,000.
6. Final Tax Payable: ₹60,000 - ₹60,000 = ₹0

Break-Even Analysis:

The decision to choose a regime hinges on the break-even point. This is the level of total deductions at which the tax liability under both regimes becomes equal. If a taxpayer's claimed deductions exceed this point, the Old Regime is typically more beneficial.

Consider a salaried individual with a gross income of ₹18,00,000.

• Tax Calculation under New Regime:

  • Gross Income: ₹18,00,000
  • Less: Standard Deduction: ₹75,000
  • Taxable Income: ₹17,25,000
  • Tax Liability:
    • On first ₹4L: ₹0
    • On next ₹4L (₹4L-₹8L): ₹20,000
    • On next ₹4L (₹8L-₹12L): ₹40,000
    • On next ₹4L (₹12L-₹16L): ₹60,000
    • On remaining ₹1.25L (₹16L-₹17.25L): 20% = ₹25,000
    • Total Tax: ₹1,45,000 + 4% Cess = ₹1,50,800

• Tax Calculation under Old Regime:

  • To match the tax of ₹1,50,800 under the New Regime, we need to find the required deductions.
  • Let 'D' be the total deductions claimed (including Standard Deduction of ₹50,000, 80C, 80D, HRA etc.).
  • Taxable Income (Old Regime): ₹18,00,000 - D
  • By solving the tax equation for the Old Regime slabs, we find that for the tax liability to be roughly equal, the total deductions (D) would need to be approximately ₹3,75,000 to ₹4,00,000.

Therefore, if this individual can claim total deductions significantly exceeding this range (e.g., from a large home loan interest payment, 80C investments, and HRA), the Old Regime would result in lower tax.

4. How to Opt-Out (If Applicable)

Since the New Regime is the default, a taxpayer must take a specific action to be assessed under the Old Regime. The procedure differs based on the nature of income:

• For Salaried Individuals (and those without business income): These taxpayers have the flexibility to choose their regime every financial year. The option can be exercised directly within the Income Tax Return (ITR-1 or ITR-2) at the time of filing. No separate form is required. They should also intimate their employer at the beginning of the year for correct TDS deduction.

• For Individuals with Business/Professional Income: The process is more stringent.

  1. File Form 10-IEA: These taxpayers must file Form 10-IEA on or before the due date for filing their ITR (under Sec 139(1)). This form is a formal declaration to opt out of the New Regime.
  2. Limited Switching: Once a taxpayer with business income opts out of the New Regime (to the Old Regime), they can switch back to the New Regime only once in their lifetime. After switching back, they cannot opt for the Old Regime again.

5. Final Recommendation

The choice between the regimes is entirely taxpayer-specific and must be reviewed annually.

• Choose the Default New Tax Regime if:

  • Your total claimable deductions and exemptions are low (e.g., less than ₹2.5 lakh).
  • You prefer a simplified tax filing process without the need to track multiple investments and expenses.
  • Your total annual income is up to ₹12.75 lakh, as it results in zero tax liability without any investment requirement.

• Choose to Opt-Out and select the Old Tax Regime if:

  • You have significant deductions from sources like a home loan (interest under Sec 24b), high HRA, and fully utilize the ₹1.5 lakh limit under Section 80C.
  • You make substantial contributions to NPS (claiming the additional ₹50,000 under 80CCD(1B)).
  • You have high medical insurance premiums for self and parents under Section 80D.

Our team strongly advises all taxpayers to perform a detailed comparative analysis using an official income tax calculator. This allows for a precise computation of tax liability under both scenarios, leading to an informed and optimal decision.

💡 Tax Planning Tip: Use a reliable tax calculator to check your break-even point between the Old and New Regime in 2026.