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Income Tax Calculator India — FY 2026-27 (New vs Old Regime)

Free income tax calculator for India — compare New Tax Regime vs Old Tax Regime, compute in-hand salary, HRA exemption, 80C savings, and LTCG/STCG taxes. Updated for FY 2026-27.

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🔗 Live Tax Calculators

Tool	URL	Use Case
Income Tax Calculator	stockcalc.in/calculator/income-tax	New vs Old regime comparison
In-Hand Salary	stockcalc.in/calculator/in-hand-salary	CTC to take-home salary breakdown
HRA Calculator	stockcalc.in/calculator/hra	HRA exemption under Section 10(13A)
LTCG Calculator	stockcalc.in/calculator/ltcg	Long-term capital gains tax
STCG Calculator	stockcalc.in/calculator/stcg	Short-term capital gains tax
TDS Calculator	stockcalc.in/calculator/tds	TDS on salary & other income
Tax Loss Harvesting	stockcalc.in/calculator/tax-loss-harvesting	Offset gains with losses
US Stock Tax (India)	stockcalc.in/calculator/us-stock-tax	Tax on US equity investments

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📐 Tax Slabs FY 2026-27 (Open Source)

New Tax Regime (Default from FY 2024-25)

/**
 * New Tax Regime — FY 2026-27
 * Standard Deduction: ₹75,000 (salaried)
 * Rebate u/s 87A: ₹25,000 (if taxable income ≤ ₹7L)
 */
const NEW_REGIME_SLABS = [
  { min: 0,        max: 400000,   rate: 0    },
  { min: 400000,   max: 800000,   rate: 0.05 },
  { min: 800000,   max: 1200000,  rate: 0.10 },
  { min: 1200000,  max: 1600000,  rate: 0.15 },
  { min: 1600000,  max: 2000000,  rate: 0.20 },
  { min: 2000000,  max: 2400000,  rate: 0.25 },
  { min: 2400000,  max: Infinity, rate: 0.30 },
];

function calculateNewRegimeTax(grossSalary) {
  const standardDeduction = 75000;
  const taxableIncome = Math.max(0, grossSalary - standardDeduction);
  let tax = 0;

  for (const slab of NEW_REGIME_SLABS) {
    if (taxableIncome > slab.min) {
      const taxableInSlab = Math.min(taxableIncome, slab.max) - slab.min;
      tax += taxableInSlab * slab.rate;
    }
  }

  // Rebate u/s 87A — zero tax if taxable income ≤ ₹12L (new regime)
  if (taxableIncome <= 1200000) tax = 0;

  // Health & Education Cess: 4%
  return Math.round(tax * 1.04);
}

// Example: ₹15 LPA CTC
console.log(calculateNewRegimeTax(1500000)); // ₹1,17,000

Old Tax Regime

/**
 * Old Tax Regime — FY 2026-27
 * Allows 80C (₹1.5L), 80D, HRA, LTA, Standard Deduction (₹50,000)
 */
const OLD_REGIME_SLABS = [
  { min: 0,       max: 250000,   rate: 0    },
  { min: 250000,  max: 500000,   rate: 0.05 },
  { min: 500000,  max: 1000000,  rate: 0.20 },
  { min: 1000000, max: Infinity, rate: 0.30 },
];

function calculateOldRegimeTax(grossSalary, deductions = {}) {
  const {
    standardDeduction = 50000,
    section80C = 0,       // max ₹1,50,000
    section80D = 0,       // health insurance premium
    hraExemption = 0,
  } = deductions;

  const totalDeductions = standardDeduction
    + Math.min(section80C, 150000)
    + section80D
    + hraExemption;

  const taxableIncome = Math.max(0, grossSalary - totalDeductions);
  let tax = 0;

  for (const slab of OLD_REGIME_SLABS) {
    if (taxableIncome > slab.min) {
      const taxableInSlab = Math.min(taxableIncome, slab.max) - slab.min;
      tax += taxableInSlab * slab.rate;
    }
  }

  // Rebate u/s 87A (taxable income ≤ ₹5L)
  if (taxableIncome <= 500000) tax = Math.max(0, tax - 12500);

  return Math.round(tax * 1.04); // + 4% cess
}

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🧮 HRA Exemption Formula

/**
 * HRA Exemption — Minimum of 3 conditions (Section 10(13A))
 * @param {number} basicSalary    - Basic + DA (₹/year)
 * @param {number} hraReceived    - HRA received from employer (₹/year)
 * @param {number} rentPaid       - Annual rent paid (₹/year)
 * @param {boolean} isMetro       - true for Delhi/Mumbai/Kolkata/Chennai
 */
function hraExemption(basicSalary, hraReceived, rentPaid, isMetro) {
  const condition1 = hraReceived;
  const condition2 = isMetro ? basicSalary * 0.50 : basicSalary * 0.40;
  const condition3 = Math.max(0, rentPaid - basicSalary * 0.10);
  return Math.min(condition1, condition2, condition3);
}

// → Use the live HRA calculator: https://stockcalc.in/calculator/hra

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📊 New vs Old Regime — When to Choose?

Annual Income	Regime to Choose
Up to ₹7.75L (salaried)	New Regime (zero tax)
₹8L – ₹15L	Depends on deductions (80C + HRA)
Above ₹15L with max deductions	Old Regime may save ₹50K–₹1L
Above ₹15L with no deductions	New Regime is better

→ Compare both with exact numbers: stockcalc.in/calculator/income-tax

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