Income Tax Calculator

Comprehensive Guide to India's Income Tax System: Old vs. New Regime

Tax planning is one of the most important aspects of personal finance in India. Since FY 2020-21, taxpayers have been presented with a dual tax system: the Old Tax Regime and the New Tax Regime (governed by Section 115BAC of the Income Tax Act). Under the New Tax Regime, tax slab rates are significantly lower, but taxpayers must sacrifice almost all standard exemptions and deductions. Under the Old Tax Regime, slab rates are higher, but taxpayers can claim a wide range of tax-saving deductions (such as Section 80C, 80D, HRA, and home loan interest) to reduce their taxable income.

Starting from FY 2023-24, the government has made the New Tax Regime the default option. This means if you do not actively declare your preference to your employer or select the Old Regime when filing your annual Income Tax Return (ITR), your tax will automatically be computed using the New Regime's rates. Deciding which regime is better depends entirely on the total value of the deductions you can claim.

How to Use the DigitalFino Income Tax Calculator

Our free Income Tax Calculator performs side-by-side tax computations to help you make an informed decision. Follow these steps to compare your options:

1. Enter Your Gross Annual Income: Use the slider or type your total annual earnings in the "Gross Annual Income" field. This should include your basic salary, HRA, bonuses, interest income, and any other taxable receipts.
2. Input Your Tax Deductions: Enter the sum of all tax-saving investments and exemptions you plan to claim under the Old Regime (such as Section 80C, Section 80D, HRA deductions, and interest on home loans). Note that these deductions only affect the Old Regime calculations.
3. Review the Recommended Choice: The calculator instantly displays which regime is more cost-effective for your specific financial profile.
4. Compare Tax Liabilities: View the exact tax amounts payable under both regimes, alongside an interactive bar chart that compares your tax liabilities.
5. Analyze the Detailed Slabs Table: Scroll down to see the slab-by-slab tax breakdown. This table shows exactly how tax accumulates at each income level under both systems.

The Income Tax slab structures for FY 2025-26 & FY 2026-27

The slabs under both regimes are structured as follows:

1. New Tax Regime Slabs (Default)

• Up to ₹3,00,000: Nil
• ₹3,00,001 to ₹7,00,000: 5%
• ₹7,00,001 to ₹10,00,000: 10%
• ₹10,00,001 to ₹12,00,000: 15%
• ₹12,00,001 to ₹15,00,000: 20%
• Above ₹15,00,000: 30%

Salaried employees under the New Regime receive a Standard Deduction of ₹75,000. Furthermore, a tax rebate under Section 87A ensures that individuals with a net taxable income of up to ₹7,00,000 pay zero income tax (meaning salaried employees with a gross income of up to ₹7,75,000 pay no tax).

2. Old Tax Regime Slabs (Optional)

• Up to ₹2,50,000: Nil
• ₹2,50,001 to ₹5,00,000: 5%
• ₹5,00,001 to ₹10,00,000: 20%
• Above ₹10,00,000: 30%

Salaried employees under the Old Regime receive a Standard Deduction of ₹50,000. The rebate under Section 87A guarantees zero tax for net taxable incomes of up to ₹5,00,000.

Worked Mathematical Example: ₹12,00,000 Gross Salary Comparison

Let us look at a detailed worked example comparing tax liabilities on a gross salary of ₹12,00,000. Assume the taxpayer has tax-saving deductions totaling ₹2,50,000 under the Old Regime (consisting of ₹1.5 Lakh under Section 80C, ₹25,000 under Section 80D, and ₹75,000 in HRA exemptions):

Scenario A: New Tax Regime Calculation

• Gross Salary: ₹12,00,000
• Less: Standard Deduction: ₹75,000
• Net Taxable Income: ₹11,25,000
• Tax Slabs Computation:
  • ₹0 to ₹3,00,000: Nil
  • ₹3,00,001 to ₹7,00,000: 5% of ₹4,00,000 = ₹20,000
  • ₹7,00,001 to ₹10,00,000: 10% of ₹3,00,000 = ₹30,000
  • ₹10,00,001 to ₹11,25,000: 15% of ₹1,25,000 = ₹18,750
• Subtotal Tax: ₹20,000 + ₹30,000 + ₹18,750 = ₹68,750
• Add: Health & Education Cess (4%): 4% of ₹68,750 = ₹2,750
• Total New Regime Tax Payable: ₹68,750 + ₹2,750 = ₹71,500

Scenario B: Old Tax Regime Calculation

• Gross Salary: ₹12,00,000
• Less: Standard Deduction: ₹50,000
• Less: Total Deductions: ₹2,50,000 (80C + 80D + HRA)
• Net Taxable Income: ₹12,00,000 - ₹50,000 - ₹2,50,000 = ₹9,00,000
• Tax Slabs Computation:
  • ₹0 to ₹2,50,000: Nil
  • ₹2,50,001 to ₹5,00,000: 5% of ₹2,50,000 = ₹12,500
  • ₹5,00,001 to ₹9,00,000: 20% of ₹4,00,000 = ₹80,000
• Subtotal Tax: ₹12,500 + ₹80,000 = ₹92,500
• Add: Health & Education Cess (4%): 4% of ₹92,500 = ₹3,700
• Total Old Regime Tax Payable: ₹92,500 + ₹3,700 = ₹96,200

In this comparison, even though you claim ₹2.5 Lakhs in deductions, the New Tax Regime is cheaper by ₹24,700 (₹96,200 - ₹71,500).

How to Perform a Tax Break-Even Analysis

For any gross income level, there is a specific threshold of investments and deductions known as the Break-even Deduction. If your total deductions exceed this break-even limit, the Old Regime is more beneficial; otherwise, the New Regime saves you more money.

For a gross salary of ₹12,00,000, the break-even deduction is ₹3,68,750 (excluding standard deduction). This means that to pay less tax under the Old Regime, you would need to invest ₹1.5 Lakh in Section 80C, pay ₹25,000 in health insurance, and claim at least ₹1,93,750 in HRA or home loan interest. If your actual expenses do not reach this high threshold, choosing the New Tax Regime is the more financially sound option.