Income Tax Calculator (FY 2025-26)

Income Tax Calculator

Filing income tax is one of the most significant annual financial obligations for every Indian taxpayer. Yet many people overpay simply because they don't understand the available deductions, the right tax regime to choose, or how their income is taxed across different slabs. This income tax calculator demystifies the process — covering FY 2025-26 slabs for both the Old and New Tax Regimes, Section 87A rebate, surcharge, and the 4% health and education cess.

What is Income Tax?

Income tax is a direct tax levied by the Government of India on the income earned by individuals, Hindu Undivided Families (HUFs), companies, and other entities during a financial year. For salaried individuals, the tax is calculated on gross income after allowable deductions and exemptions. The current system offers two parallel regimes: the Old Regime (higher rates with deductions) and the New Regime (lower rates, minimal deductions), allowing taxpayers to choose whichever results in lower tax outgo.

How Does the Calculator Work?

Enter your annual gross income — for example, ₹12,00,000 — along with your regime choice. If you choose the Old Regime, add your deductions like Section 80C investments, Section 80D health insurance premiums, and home loan interest under Section 24b. The calculator applies the appropriate tax slabs, standard deduction, Section 87A rebate (if applicable), surcharge, and 4% cess to arrive at your precise tax liability and effective tax rate.

Benefits of Using This Calculator

Compare Both Regimes Side by Side

The single most powerful feature is the instant regime comparison. For an income of ₹12,00,000, the difference between regimes can range from zero to tens of thousands of rupees depending on your deductions. The calculator shows you exactly which regime saves more money — no guesswork, no back-of-envelope math.

Understand Your Monthly TDS

Knowing your annual tax liability is only half the picture. The calculator breaks it down to monthly TDS (Tax Deducted at Source), which your employer withholds from your salary. This lets you verify your payslip deductions and plan your monthly cash flow accurately.

Optimise Deductions Before March 31st

If you're in the Old Regime, the calculator helps you model different investment scenarios. Should you invest more in 80C or buy additional health insurance under 80D? Adjusting these inputs shows the immediate tax impact of each decision before the financial year closes.

Real-World Example

Consider a salaried professional earning ₹12,00,000 annually. Under the New Regime (FY 2025-26), after a ₹75,000 standard deduction, taxable income is ₹11,25,000. With no rebate applicable (income above ₹12,00,000 threshold), tax is calculated across slabs, plus 4% cess. Under the Old Regime with maximum 80C of ₹1,50,000, 80D of ₹25,000, and ₹50,000 standard deduction, the taxable income and resulting tax can be meaningfully different. Always run both scenarios before submitting Form 12BB to your employer.

Key Tax-Saving Factors

• Section 80C: Investments in PPF, ELSS, EPF, NSC, life insurance premiums — up to ₹1,50,000 deduction.
• Section 80D: Health insurance premiums for self, family, and parents — up to ₹1,00,000 total deduction.
• Section 24b: Home loan interest up to ₹2,00,000 for self-occupied property under Old Regime.
• Section 87A Rebate: Zero tax for New Regime taxpayers with taxable income up to ₹12,00,000.
• Standard Deduction: ₹75,000 under New Regime, ₹50,000 under Old Regime — automatic, no documentation needed.

Who Should Use This Calculator?

This calculator is designed for salaried employees deciding between Old and New Regime, self-employed professionals estimating advance tax liability, freelancers computing their annual tax outgo, and HR teams helping employees with investment declarations. It's equally useful during tax planning (April–December) and tax filing (January–July).

Key Takeaways

• The New Regime is now the default regime — opt out explicitly if you want the Old Regime.
• Zero tax for New Regime taxpayers earning up to ₹12,00,000 gross (after standard deduction).
• Compare both regimes every year — the better choice can change as your income or deductions change.
• Effective tax rate is more meaningful than marginal rate for understanding your true tax burden.
• Surcharge applies on incomes above ₹50,00,000 — consult a CA if applicable.