Income Tax Calculator | AiTech Quest Comprehensive Indian Income Tax Calculator FY 2025-26 body { font-family: Arial, sans-serif; background: #f4f9fd; margin: 0;} .container { max-width: 900px; margin: 30px auto; background: #fff; padding: 25px 20px; border-radius: 10px; box-shadow: 0 2px 12px #0002;} h2 { text-align: center; color: #1e5a8d;} .section { margin-bottom: 18px; padding: 15px 10px; border-radius: 7px; background: #f6fafd;} .section.advanced { background: #eaf3fa;} label { display: block; margin: 8px 0 2px;} input, select { width: 100%; padding: 7px; border-radius: 4px; border: 1px solid #bbb; margin-bottom: 6px;} .row { display: flex; gap: 12px;} .row > div { flex: 1;} button { padding: 12px; width: 100%; background: #1e5a8d; color: #fff; border: none; border-radius: 6px; font-size: 16px; cursor: pointer;} button:hover { background: #164066;} .summary { background: #e8f5e9; padding: 18px; border-radius: 8px; margin-top: 20px; font-size: 1.05em;} .error { color: #c00; margin-bottom: 10px;} .toggle { margin: 10px 0 18px;} .toggle label { display: inline-block; margin-right: 18px;} .export-btns { display: flex; gap: 10px; margin-top: 10px; } .circulars { background: #eaf3fa; padding: 10px; border-radius: 6px; font-size: 0.95em; margin-top: 12px;} .circulars a { color: #1e5a8d; text-decoration: underline;} @media (max-width: 700px) { .container { padding: 8px; } } Comprehensive Income Tax CalculatorFY 2025-26 (AY 2026-27) Basic Advanced Age Group SelectBelow 6060 - 80Above 80 Residential Status ResidentNon-Resident Indian (NRI) Tax Regime Compare Both & RecommendOld Regime OnlyNew Regime Only Income from Salary (₹) Total Deductions (80C/80D/24B etc., Old Regime, ₹) Advanced Income Heads Income from House Property (Net, ₹) Business/Profession (₹) STCG (Equity, STT paid, ₹) STCG (Debt/Other, ₹) LTCG (Equity, Grandfathered, ₹) LTCG (Debt/Other, ₹) Other Sources (Interest, Dividends, etc., ₹) Deductions (Old Regime) Section 80C (Max ₹1,50,000) Section 80D (Health Insurance) Section 80CCD(1B) (NPS, Max ₹50,000) Section 24B (Home Loan Interest, Max ₹2,00,000) Section 80E (Education Loan Interest) Section 80G (Donations) HRA Exemption LTA Exemption Section 80TTA/80TTB (Interest on Savings/Deposits) Section 80U (Disability) Section 134 (Rent Paid) Calculate Tax Print Export PDF Latest CBDT Circulars & Updates: CBDT Circulars Portal | Income Tax Latest News Calculator updated as per Income-Tax Bill, 2025. function toggleMode() { const mode = document.querySelector('input:checked').value; document.getElementById('advancedSection').style.display = (mode === 'advanced') ? 'block' : 'none'; document.getElementById('basicSection').style.display = (mode === 'advanced') ? 'none' : 'block'; } function formatINR(num) { return '₹' + Number(num).toLocaleString('en-IN'); } function calculateTax() { document.getElementById('error').innerText = ''; document.getElementById('summary').style.display = 'none'; const mode = document.querySelector('input:checked').value; const age = document.getElementById('age').value; const regime = document.getElementById('regime').value; const residential = document.getElementById('residential').value; // Collect incomes let salary = Number(document.getElementById('salary').value) | 0; let houseProperty = 0, business = 0, stcg_eq = 0, stcg_debt = 0, ltcg_eq = 0, ltcg_debt = 0, otherIncome = 0; if (mode === 'advanced') { houseProperty = Number(document.getElementById('houseProperty').value) | 0; business = Number(document.getElementById('business').value) | 0; stcg_eq = Number(document.getElementById('stcg_eq').value) | 0; stcg_debt = Number(document.getElementById('stcg_debt').value) | 0; ltcg_eq = Number(document.getElementById('ltcg_eq').value) | 0; ltcg_debt = Number(document.getElementById('ltcg_debt').value) | 0; otherIncome = Number(document.getElementById('otherIncome').value) | 0; } // Collect deductions let totalDeductions = 0; let deductionDetails = ''; if (mode === 'advanced') { const ded80C = Math.min(Number(document.getElementById('ded80C').value) | 0, 150000); const ded80D = Number(document.getElementById('ded80D').value) | 0; const ded80CCD = Math.min(Number(document.getElementById('ded80CCD').value) | 0, 50000); const ded24B = Math.min(Number(document.getElementById('ded24B').value) | 0, 200000); const ded80E = Number(document.getElementById('ded80E').value) | 0; const ded80G = Number(document.getElementById('ded80G').value) | 0; const dedHRA = Number(document.getElementById('dedHRA').value) | 0; const dedLTA = Number(document.getElementById('dedLTA').value) | 0; const ded80TTA = Number(document.getElementById('ded80TTA').value) | 0; const ded80U = Number(document.getElementById('ded80U').value) | 0; const dedRent = Number(document.getElementById('dedRent').value) | 0; totalDeductions = ded80C + ded80D + ded80CCD + ded24B + ded80E + ded80G + dedHRA + dedLTA + ded80TTA + ded80U + dedRent; deductionDetails = ` 80C: ${formatINR(ded80C)} 80D: ${formatINR(ded80D)} 80CCD(1B): ${formatINR(ded80CCD)} 24B: ${formatINR(ded24B)} 80E: ${formatINR(ded80E)} 80G: ${formatINR(ded80G)} HRA: ${formatINR(dedHRA)} LTA: ${formatINR(dedLTA)} 80TTA/80TTB: ${formatINR(ded80TTA)} 80U: ${formatINR(ded80U)} Rent Paid: ${formatINR(dedRent)} `; } else { totalDeductions = Number(document.getElementById('basicDeductions').value) | 0; deductionDetails = `Total Deductions: ${formatINR(totalDeductions)}`; } // Validation if (!age | salary <= 0) { document.getElementById('error').innerText = 'Please enter all required fields with valid values.'; return; } // Exemption limits let oldExemption = 250000; if (age === '60to80') oldExemption = 300000; if (age === 'above80') oldExemption = 500000; // New regime standard deduction const newStdDeduction = 75000; // Compute total income (excluding LTCG/STCG for special rates) let grossTotal = salary + houseProperty + business + otherIncome; let totalIncomeOld = Math.max(0, grossTotal + stcg_eq + stcg_debt + ltcg_eq + ltcg_debt - totalDeductions); let totalIncomeNew = Math.max(0, grossTotal + stcg_eq + stcg_debt + ltcg_eq + ltcg_debt - newStdDeduction); // Taxable income for slab calculation (excluding LTCG/STCG for special rates) let slabIncomeOld = Math.max(0, grossTotal - totalDeductions); let slabIncomeNew = Math.max(0, grossTotal - newStdDeduction); // --- Old Regime Tax Calculation --- let taxOld = 0, rebateOld = 0; let slabsOld = ; let prev = 0; for (let i = 0; i prev) { let taxableAtThisRate = Math.min(slabIncomeOld, slab.limit) - prev; taxOld += taxableAtThisRate * slab.rate; prev = slab.limit; } } // Add STCG: Equity (15%), Debt (slab) taxOld += Math.max(0, stcg_eq * 0.15); // STCG on debt/other is taxed at slab, already included in slabIncomeOld // LTCG: Equity (above ₹1L at 10%, grandfathering), Debt (20% with indexation) taxOld += Math.max(0, (ltcg_eq > 100000 ? (ltcg_eq - 100000) * 0.10 : 0)); taxOld += Math.max(0, ltcg_debt * 0.20); // Rebate 87A rebateOld = (totalIncomeOld <= 500000) ? Math.min(taxOld, 12500) : 0; taxOld -= rebateOld; // --- New Regime Tax Calculation --- let taxNew = 0, rebateNew = 0; let slabsNew = ; prev = 0; for (let i = 0; i prev) { let taxableAtThisRate = Math.min(slabIncomeNew, slab.limit) - prev; taxNew += taxableAtThisRate * slab.rate; prev = slab.limit; } } // Add STCG/LTCG as above (special rates apply in both regimes) taxNew += Math.max(0, stcg_eq * 0.15); taxNew += Math.max(0, (ltcg_eq > 100000 ? (ltcg_eq - 100000) * 0.10 : 0)); taxNew += Math.max(0, ltcg_debt * 0.20); // Rebate (up to ₹12L, max ₹60,000) rebateNew = (totalIncomeNew 50L up to 1Cr // 15% of tax if income > 1Cr up to 2Cr // 25% of tax if income > 2Cr up to 5Cr // 37% of tax if income > 5Cr let sc = 0; if (taxableIncome > 50000000) sc = 0.37 * tax; else if (taxableIncome > 20000000) sc = 0.25 * tax; else if (taxableIncome > 10000000) sc = 0.15 * tax; else if (taxableIncome > 5000000) sc = 0.10 * tax; return sc; } let surchargeOld = surcharge(totalIncomeOld, Math.max(0, taxOld)); let surchargeNew = surcharge(totalIncomeNew, Math.max(0, taxNew)); // --- Health & Education Cess (4%) --- let cessOld = 0.04 * (Math.max(0, taxOld) + surchargeOld); let cessNew = 0.04 * (Math.max(0, taxNew) + surchargeNew); // --- Total Tax Payable --- let totalTaxOld = Math.max(0, taxOld) + surchargeOld + cessOld; let totalTaxNew = Math.max(0, taxNew) + surchargeNew + cessNew; // --- Recommendation Logic --- let recommendation = ''; let suggestion = ''; // Compare regardless of selection if (totalTaxNew < totalTaxOld) { recommendation = 'New Regime is better for you.'; if (totalTaxOld - totalTaxNew > 10000 && totalDeductions < 200000) { suggestion = 'Consider maximizing your deductions if you want to benefit from the Old Regime.'; } } else if (totalTaxOld < totalTaxNew) { recommendation = 'Old Regime is better for you.'; if (totalTaxNew - totalTaxOld > 10000 && totalDeductions < 200000) { suggestion = 'You may save more by claiming all eligible deductions under Old Regime.'; } } else { recommendation = 'Both regimes result in the same tax. Choose either.'; } // Also indicate user's selected regime if (regime === 'old') { recommendation += ' (You selected: Old Regime)'; } else if (regime === 'new') { recommendation += ' (You selected: New Regime)'; } else if (regime === 'compare') { recommendation += ' (Compared both as selected)'; } // --- Output Summary --- let summary = ` Calculation Summary Gross Income (All Heads): ${formatINR(salary + houseProperty + business + stcg_eq + stcg_debt + ltcg_eq + ltcg_debt + otherIncome)} Age Group: ${age === 'below60' ? 'Below 60' : age === '60to80' ? '60 - 80' : 'Above 80'} Residential Status: ${residential === 'resident' ? 'Resident' : 'NRI'} Old Regime: • Deductions claimed: ${formatINR(totalDeductions)} • Taxable Income: ${formatINR(slabIncomeOld + stcg_eq + stcg_debt + ltcg_eq + ltcg_debt)} • Tax before rebate: ${formatINR(taxOld + rebateOld)} • Rebate: ${formatINR(rebateOld)} • Surcharge: ${formatINR(surchargeOld)} • Cess (4%): ${formatINR(cessOld)} • Total Tax Payable: ${formatINR(totalTaxOld)} ${mode === 'advanced' ? deductionDetails : ''} New Regime: • Standard Deduction: ${formatINR(newStdDeduction)} • Taxable Income: ${formatINR(slabIncomeNew + stcg_eq + stcg_debt + ltcg_eq + ltcg_debt)} • Tax before rebate: ${formatINR(taxNew + rebateNew)} • Rebate: ${formatINR(rebateNew)} • Surcharge: ${formatINR(surchargeNew)} • Cess (4%): ${formatINR(cessNew)} • Total Tax Payable: ${formatINR(totalTaxNew)} Recommendation: ${recommendation} ${suggestion} Capital Gains Details: • STCG (Equity): ${formatINR(stcg_eq)} @15% • STCG (Debt/Other): ${formatINR(stcg_debt)} @slab • LTCG (Equity, Grandfathered): ${formatINR(ltcg_eq)} @10% above ₹1L • LTCG (Debt/Other): ${formatINR(ltcg_debt)} @20% `; document.getElementById('summary').innerHTML = summary; document.getElementById('summary').style.display = 'block'; } // Print summary function printSummary() { window.print(); } // Export summary as PDF using jsPDF function exportPDF() { const { jsPDF } = window.jspdf; let doc = new jsPDF(); let summaryText = document.getElementById('summary').innerText.replace(/₹/g, 'Rs. '); doc.setFontSize(12); doc.text(summaryText, 10, 10, { maxWidth: 185 }); doc.save('tax-summary-fy2025-26.pdf'); }

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Comprehensive Indian Income Tax Calculator FY 2025-26

Comprehensive Income Tax Calculator
FY 2025-26 (AY 2026-27)

Basic Advanced

Age Group Residential Status Tax Regime

Income from Salary (₹) Total Deductions (80C/80D/24B etc., Old Regime, ₹)

Latest CBDT Circulars & Updates:
CBDT Circulars Portal | Income Tax Latest News
Calculator updated as per Income-Tax Bill, 2025.

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