Income Tax Calculator FY 2025-26

How Your Total Tax Is Built

Your final tax liability isn't just the slab-rate tax — it's built up in stages: slab tax on your taxable income, minus any rebate you're eligible for, plus surcharge if your income crosses certain high-income thresholds, plus a 4% Health and Education Cess on the tax-plus-surcharge figure. Each stage changes the number meaningfully, so a quick mental "slab rate × income" estimate will usually undershoot your actual liability once cess and surcharge apply.

Worked Example

₹15,00,000 annual income under the new regime (₹75,000 standard deduction, no other deductions since most aren't available under this regime):

At exactly ₹12,00,000 taxable income, tax works out to ₹60,000 before rebate — and the rebate available up to that threshold reduces it to zero, which is why income up to ₹12 lakh is effectively tax-free under the new regime. Income even slightly above ₹12 lakh loses the rebate entirely and is taxed per the slabs from the start — in law, marginal relief exists specifically to prevent that cliff from costing you more than the amount by which you exceeded the threshold (see below), though this calculator applies the rebate as a straightforward cutoff and doesn't separately compute that relief, so a result right at the boundary may differ slightly from a professional computation.

Surcharge and Marginal Relief

Surcharge is an additional charge on your tax (not your income) once your income crosses ₹50 lakh, rising in steps as income increases further:

Without a safeguard, someone earning ₹1 just above a surcharge threshold could end up with less take-home pay than someone earning ₹1 less — because the surcharge would apply to the entire tax amount, not just the income above the threshold. Marginal relief prevents this: it caps the extra tax (surcharge included) at no more than the actual rupee amount by which your income exceeds the threshold, so crossing a surcharge threshold by a small amount never costs you more than that small amount. This calculator computes surcharge directly from the slabs above without separately applying that relief, so if your income sits within a few thousand rupees of ₹50 lakh, ₹1 crore, or ₹2 crore, get the exact figure checked rather than relying on this estimate.

Old vs New Regime: What Actually Changes

The new regime offers lower slab rates and a higher standard deduction but removes most investment-linked and expense-linked deductions — 80C, 80D, HRA exemption, and home loan interest deduction (for self-occupied property) aren't available under it. The old regime keeps higher slab rates but lets you claim all of these, provided you actually have the qualifying investments, insurance, or rent expense to back them. There's no universal winner — someone with substantial 80C and HRA claims may still come out ahead under the old regime despite its steeper slabs, while someone with minimal deductions is usually better off under the new regime's lower rates. Compare both using your actual numbers rather than assuming either default is right for you.

What Counts as Deductions Under the Old Regime

The calculator above lets you enter Section 80C, Section 80D, and HRA exemption separately, alongside the standard deduction (fixed at ₹50,000 for salaried and pension income under the old regime, applied automatically). Section 80C covers a combined ceiling — PPF, ELSS, life insurance premium, EPF contribution, and home loan principal repayment all draw from the same limit rather than separate ones. Section 80D covers health insurance premiums, with a separate limit that's higher if the premium is for senior-citizen parents. HRA exemption is computed from your actual rent paid, basic salary, and city of residence — this calculator takes it as a single figure you enter rather than deriving it, so calculate your eligible HRA exemption separately before entering it here.

Because these deductions apply only under the old regime, a taxpayer weighing both regimes should total up every deduction they can genuinely substantiate with documentation — investment proofs, insurance receipts, rent receipts — before comparing, rather than estimating loosely. An overstated deduction figure makes the old regime look artificially more attractive than it would be at filing time.

Health and Education Cess

Cess is charged at 4% on the sum of your tax and surcharge (not on your income directly), under both regimes. It's a fixed, non-negotiable add-on that funds specific government programs, separate from the tax and surcharge calculation itself. Because it's calculated on tax-plus-surcharge rather than income, a change in your surcharge bracket changes your cess amount too, even if your slab tax itself doesn't move.

Reading Your Results Correctly

The calculator above shows total tax for both regimes side by side, along with an estimated take-home figure (income minus total tax). Keep in mind this is a simplified computation: it doesn't account for every possible income head (capital gains taxed at special rates, for instance, aren't included here), and it applies the rebate and surcharge as direct cutoffs rather than layering in marginal relief at the exact boundary. For income close to ₹50 lakh, ₹1 crore, ₹2 crore, or the ₹12 lakh (new regime) / ₹5 lakh (old regime) rebate thresholds, treat the result as indicative and get an exact computation done before making a filing decision.

Filing a Return Even When Your Tax Works Out to Zero

A rebate that brings your computed tax down to nil doesn't automatically mean you're excused from filing a return. Return filing is generally required once your gross total income exceeds the basic exemption threshold, regardless of whether the rebate later reduces your final tax to zero — the rebate is applied after the return is filed and the computation is done, not a reason to skip filing in the first place. There are also specific situations (certain high-value transactions, foreign asset or account holdings, or wanting to claim a refund of TDS already deducted) that can require filing even for someone whose income sits below the exemption threshold entirely. If you're unsure whether your specific situation requires a return this year, it's worth checking rather than assuming a zero-tax result means no filing obligation.

This Calculator Estimates Tax, Not the Return Form You Need

Beyond the tax amount, the ITR form you're required to use depends on your income sources (salary alone versus salary plus business income, capital gains, foreign assets, or multiple properties), not on the income level this calculator asks for. Someone with only salary income and interest typically uses one of the simpler forms, while capital gains, business income, or foreign asset holdings usually push you into a more detailed form with additional schedules. Since form applicability and numbering are reviewed each year, confirm the current correct form for your income mix before filing rather than assuming last year's form still fits.

Rounding and Small Discrepancies

Tax computations round to the nearest rupee at several stages — taxable income, slab tax, surcharge, and cess are each conventionally rounded before the next figure is computed from them — so a manual recalculation using unrounded intermediate figures can land a few rupees away from this calculator's output, or from your actual filed computation. This is normal and doesn't indicate an error in either calculation; treat a discrepancy of a few rupees as a rounding artifact rather than a sign that one of the two calculations used the wrong rate or slab.