Income Tax Calculator (India)
The income tax calculator estimates how much income tax you owe in India under either the new or old regime, applying standard deduction, the 87A rebate and 4% health and education cess.
Last updated 2026-08-14
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quizExample
How this calculator works, with real numbers (no JavaScript needed):
Inputs
- Annual income
- 1200000
- Tax regime
- new
- Deductions (80C, 80D, etc.)
- 150000
Results
- Taxable income
- ₹11,25,000
- Income tax
- ₹0
- Health & education cess (4%)
- ₹0
- Total tax payable
- ₹0
- Effective tax rate
- 0%
functionsThe formula
India's income tax applies progressive slabs — different portions of your income are taxed at different rates. How much you owe depends on which regime you choose. You can pick whichever gives you lower tax.
The new regime (default since FY 2023-24)
No exemptions needed — lower rates, a flat ₹75,000 standard deduction, and income up to ₹12,00,000 is tax-free thanks to the 87A rebate:
| Slab | Rate |
|---|---|
| 0 – ₹4,00,000 | 0% |
| ₹4,00,001 – ₹8,00,000 | 5% |
| ₹8,00,001 – ₹12,00,000 | 10% |
| ₹12,00,001 – ₹16,00,000 | 15% |
| ₹16,00,001 – ₹20,00,000 | 20% |
| ₹20,00,001 – ₹24,00,000 | 25% |
| Above ₹24,00,000 | 30% |
The old regime
You can claim deductions — Section 80C (up to ₹1.5 lakh), 80D (health insurance), HRA, home-loan interest and more. Rates: 0% up to ₹2.5 lakh, 5% up to ₹5 lakh, 20% up to ₹10 lakh, 30% above. The 87A rebate makes income up to ₹5,00,000 tax-free.
How the calculator computes tax
- Deduct the standard deduction (₹75,000 new / ₹50,000 old) and any 80C/80D-style deductions (old regime) to get taxable income.
- Apply the slabs — tax each portion at its rate.
- Apply the 87A rebate: if taxable income is at or below the rebate limit (₹12 lakh new / ₹5 lakh old), tax becomes ₹0.
- Add 4% health and education cess.
Worked example
Income of ₹12,00,000, new regime:
- Taxable = 12,00,000 − 75,000 = ₹11,25,000
- Slab tax = 0 + 5% × 4,00,000 + 10% × 3,25,000 = ₹52,500
- Rebate 87A applies (income ≤ ₹12 lakh) → tax = ₹0
Income of ₹15,00,000, new regime:
- Taxable = ₹14,25,000
- Slab tax = 0 + 5% × 4,00,000 + 10% × 4,00,000 + 15% × 2,25,000 = ₹93,750
- Cess 4% = ₹3,750 → total ≈ ₹97,500
The slabs and rebate shown here are the latest available (FY 2025-26). Budget announcements can change them — this page is updated when they do.
helpFrequently asked questions
question_markWhich tax regime is better: new or old?
The old regime wins if you claim many deductions (80C, 80D, HRA, home-loan interest). The new regime wins if you have few deductions. Use this calculator for both to compare — and keep the lower one.
question_markWhat are the income tax slabs for FY 2025-26?
Under the new regime: 0% up to ₹4 lakh, 5% to ₹8 lakh, 10% to ₹12 lakh, 15% to ₹16 lakh, 20% to ₹20 lakh, 25% to ₹24 lakh and 30% above. Income up to ₹12 lakh is tax-free via the 87A rebate.
question_markWhat is the 87A rebate?
Section 87A lets you reduce your tax to zero if your taxable income is within the rebate limit — ₹12 lakh in the new regime and ₹5 lakh in the old regime.
question_markDoes the calculator include cess?
Yes. A 4% health and education cess is added to the income tax in the total shown. The calculator also shows it as a separate line.