Filing taxes in India has evolved into a strategic decision since the introduction of the dual-regime system. Salaried employees and businesses now have to choose between the exemption-heavy Old Tax Regime and the slab-concessionary New Tax Regime. In this guide, we break down the exact mathematics of both options for Financial Year (FY) 2026-27 / Assessment Year (AY) 2027-28 to help you choose the regime that maximizes your take-home pay.
1. What is the New Tax Regime?
The New Tax Regime is the default direct tax system in India. It was introduced to simplify filing and phase out multi-layered exemptions. It offers significantly lower slab percentages but strips away popular tax-saving options like Section 80C investments or HRA rent claims. In exchange, the standard deduction has been increased to ₹75,000 for salaried individuals.
2. Slabs for New Tax Regime (FY 2026-27)
The New Regime structures income into six tax slabs:
- Up to ₹3,000,000 (₹3 Lakhs): Nil (0%)
- ₹300,001 to ₹700,000: 5%
- ₹700,001 to ₹1,000,000: 10%
- ₹1,000,001 to ₹1,200,000: 15%
- ₹1,200,001 to ₹1,500,000: 20%
- Above ₹1,500,000: 30%
Under Section 87A rebate rules, if your net taxable income does not exceed ₹7 Lakhs in the New Regime, your effective tax obligation is completely refunded, bringing your tax bill to ₹0.
3. What is the Old Tax Regime?
The Old Tax Regime remains the preferred option for individuals with large home loan commitments, significant rent payments, or substantial insurance policies. It implements higher slab percentages but permits taxpayers to claim standard deductions and deductions under Chapter VI-A to lower their taxable income threshold.
4. Slabs for Old Tax Regime
The Old Regime features fewer, steeper tax steps:
- Up to ₹250,000 (₹2.5 Lakhs): Nil (0%)
- ₹250,001 to ₹500,000: 5%
- ₹500,001 to ₹1,000,000: 20%
- Above ₹1,000,000: 30%
Under the Old Regime, the Section 87A rebate applies to individuals earning up to ₹5 Lakhs, reducing their tax to ₹0.
5. How to Choose Between Old and New Regimes
The deciding factor is your total amount of tax deductions. As a general rule of thumb:
- If your total deductions (standard deduction, Section 80C, 80D, HRA, home loan interest) are less than ₹3,75,000, the New Tax Regime is almost always the more cost-efficient option.
- If your deductions exceed ₹3,75,000, the Old Tax Regime will likely save you more money in taxes.
6. Step-by-Step Comparison Example
Let's take a salaried employee earning a gross annual salary of ₹12,00,000 with the following deductions:
- Section 80C investments: ₹1,50,000
- Section 80D health insurance: ₹25,000
- HRA Rent exemption: ₹50,000
New Tax Regime Calculation:
- Gross Income: ₹12,00,000
- Less Standard Deduction: ₹75,000
- Taxable Income: ₹11,25,000
- Tax on ₹11,25,000:
- Up to 3L: ₹0
- 3L to 7L (5% on 4L): ₹20,000
- 7L to 10L (10% on 3L): ₹30,000
- 10L to 11.25L (15% on 1.25L): ₹18,750
- Total Base Tax: ₹68,750
- Plus 4% Cess: ₹2,750
- Final New Tax: ₹71,500
Old Tax Regime Calculation:
- Gross Income: ₹12,00,000
- Less Deductions (₹50k Std + ₹1.5L 80C + ₹25k 80D + ₹50k HRA): ₹2,75,000
- Taxable Income: ₹9,25,000
- Tax on ₹9,25,000:
- Up to 2.5L: ₹0
- 2.5L to 5L (5% on 2.5L): ₹12,500
- 5L to 9.25L (20% on 4.25L): ₹85,000
- Total Base Tax: ₹97,500
- Plus 4% Cess: ₹3,900
- Final Old Tax: ₹1,01,400
In this scenario, choosing the **New Tax Regime saves the taxpayer ₹29,900**! Use our interactive online calculator to plug in your exact salary and check your optimal regime immediately.