Enter your income once and see the full computation under both regimes, slab-wise breakup, Section 87A rebate, marginal relief, surcharge and cess, with a clear verdict on which regime keeps more money in your pocket.
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Every step of both computations, side by side, so you can see exactly where each regime gains or loses ground.
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Your income tax is worked out in four steps. First, your taxable income is arrived at: gross salary less the standard deduction (₹75,000 in the new regime, ₹50,000 in the old, for salaried taxpayers and pensioners), less exempt allowances like HRA and Chapter VI-A deductions, but only the old regime allows the last two. Second, slab rates are applied progressively: each band of income is taxed only at that band's rate, never your whole income at the top rate. Third, the Section 87A rebate, marginal relief and any surcharge are applied. Finally, a 4% health and education cess is added to the result.
New regime slabs, FY 2025-26: nil up to ₹4 L · 5% for ₹4–8 L · 10% for ₹8–12 L · 15% for ₹12–16 L · 20% for ₹16–20 L · 25% for ₹20–24 L · 30% above ₹24 L. With the enhanced 87A rebate (up to ₹60,000), taxable income up to ₹12 lakh pays zero tax, for a salaried person that means a ₹12.75 lakh salary can be entirely tax-free. Old regime slabs: nil up to ₹2.5 L (₹3 L for senior citizens, ₹5 L for those 80+) · 5% to ₹5 L · 20% to ₹10 L · 30% above, with the 87A rebate wiping out tax when taxable income stays within ₹5 lakh.
Take a salaried taxpayer earning ₹16,00,000 who invests ₹1,50,000 in 80C and pays ₹25,000 of health insurance premium. Old regime: taxable income = 16,00,000 − 50,000 − 1,75,000 = ₹13,75,000; slab tax = 12,500 + 1,00,000 + 1,12,500 = ₹2,25,000; with 4% cess the bill is ₹2,34,000. New regime: taxable income = 16,00,000 − 75,000 = ₹15,25,000; slab tax = 20,000 + 40,000 + 48,750 = ₹1,08,750; with cess, ₹1,13,100. The new regime wins by ₹1,20,900, which is exactly what the calculator above shows with its default inputs.