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Income Tax Calculator — Old vs New Regime (FY 2025-26)

This income tax calculator compares your tax under the old and new regimes for FY 2025-26 (AY 2026-27) side by side. Enter your annual gross income, pick your age category, and optionally add old-regime deductions (80C, 80D, HRA, home loan interest). It applies the latest slabs, the ₹75,000 (new) and ₹50,000 (old) standard deductions, Section 87A rebate, marginal relief, 4% cess, and surcharge, then highlights which regime saves you more and by exactly how much. Everything runs in your browser — no signup.

Not sure whether to pick the old or new tax regime this year? Enter your annual gross salary, choose your age group, and (for the old regime) add deductions like Section 80C, 80D health insurance, HRA, and home loan interest. The calculator works out taxable income, tax before and after the Section 87A rebate, marginal relief where it applies, 4% health and education cess, and surcharge for high incomes — for both regimes at once. You get two clear comparison cards, a badge on the regime that saves more, the exact rupee difference, and a plain-English note explaining why the new regime's effective tax-free salary is ₹12,75,000 (not ₹12,00,000). All calculations use FY 2025-26 (AY 2026-27) slabs from Union Budget 2025 and run locally — free, no signup, nothing uploaded.

Age category

Enter your annual gross income to compare the old and new tax regimes.

Best for salaried and pension income taxed at normal slab rates. It does not cover capital gains, other special-rate income, or deductions beyond 80C, 80D, HRA, and home loan interest.

This calculator provides an estimate based on FY 2025-26 (AY 2026-27) tax slabs as per Union Budget 2025. For exact filing figures, please consult a tax professional or refer to the official Income Tax Department website.

Runs 100% in your browser. Your data never leaves your device.

Built with plain JavaScript arithmetic using the FY 2025-26 (AY 2026-27) slabs from Union Budget 2025. The new regime applies a ₹75,000 standard deduction and the revised slabs with a Section 87A rebate up to ₹60,000 (taxable income up to ₹12,00,000) plus marginal relief just above that ceiling. The old regime applies a ₹50,000 standard deduction, your entered deductions, age-based exemption limits, and a ₹12,500 rebate up to ₹5,00,000. Both add 4% health and education cess and surcharge where income crosses ₹50 lakh. All math runs locally in your browser with no server calls.

How to Use Income Tax Calculator (Old vs New Regime)

  1. Enter your annual gross salary or income
  2. Select your age category — below 60, senior, or super senior
  3. Open Add Deductions and enter old-regime deductions (80C, 80D, HRA, home loan interest) if you have them
  4. See the old and new regime tax side by side, with the cheaper regime highlighted
  5. Read the full breakdown and copy the result to share or save

When Would You Use This?

Salaried employees deciding which regime to declare to their employer at the start of the year use this to see, in rupees, whether their 80C, HRA, and home loan deductions are enough to make the old regime worth it.

Anyone confused by the headline "₹12 lakh is tax-free" uses the built-in explainer to understand that the new regime's ₹75,000 standard deduction pushes the effective tax-free gross salary to ₹12,75,000.

Freelancers and consultants estimating advance tax compare both regimes quickly without building a spreadsheet, including the 4% cess and surcharge on higher incomes that simple slab tables leave out.

Frequently Asked Questions

Which tax regime is better, old or new, for FY 2025-26?
It depends on your deductions. The new regime has lower rates and a ₹75,000 standard deduction but no other deductions. The old regime has higher rates but lets you claim 80C, 80D, HRA, and home loan interest. If your total deductions are large, the old regime can win; if they are small, the new regime usually wins. Enter your numbers above and the calculator shows the exact difference.
Is income up to 12 lakh tax free under the new regime?
Up to ₹12,00,000 of taxable income is effectively tax-free under the new regime because of the Section 87A rebate of up to ₹60,000. Since a ₹75,000 standard deduction is applied first, a salaried person can have a gross salary of up to ₹12,75,000 and still pay no tax under the new regime.
What is the standard deduction for FY 2025-26?
The standard deduction is ₹75,000 under the new regime and ₹50,000 under the old regime. It is subtracted automatically from your gross salary before tax is calculated, so you do not need to enter it.
Can I switch between the old and new tax regime every year?
Salaried individuals without business income can choose between the old and new regime each financial year. Those with business or professional income have more limited switching rules. The new regime is the default, so you must opt for the old regime if you want it.
Why is my effective tax-free salary 12.75 lakh and not 12 lakh?
The Section 87A rebate makes taxable income up to ₹12,00,000 tax-free under the new regime. The ₹75,000 standard deduction is subtracted from your gross salary before arriving at taxable income, so a gross salary of ₹12,75,000 leaves ₹12,00,000 taxable — still fully covered by the rebate.
Is this calculator accurate for ITR filing?
It gives a close estimate using FY 2025-26 (AY 2026-27) slabs, the standard deduction, Section 87A rebate, marginal relief, 4% cess, and surcharge. It does not cover every special case (capital gains taxed at special rates, specific exemptions, or detailed surcharge marginal relief). For exact filing figures, consult a tax professional or the official Income Tax Department website.
Does this cover capital gains and all deductions?
No. This is a slab-rate estimator best suited to salaried and pension income, regardless of which ITR form you file. It does not handle income taxed at special rates (such as capital gains on shares, mutual funds, or property, or lottery winnings), and it only includes the four most common deductions — 80C, 80D, HRA, and home loan interest under Section 24(b). It does not include NPS (80CCD(1B)), education loan interest (80E), donations (80G), savings interest (80TTA/80TTB), or business income adjustments. If you have those, treat the result as a ballpark old-vs-new comparison rather than a filing figure.

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