Income Tax Calculator

Income Tax Calculator - Two Regimes, One Honest Answer

Every financial year, Indian taxpayers face the same decision: stick with the old tax regime and claim every deduction available, or switch to the new regime with lower rates but far fewer deductions. For most salaried professionals the answer depends on variables that change every year - salary structure, investment pattern, rent, and home loan interest. This Income Tax Calculator computes your liability under BOTH regimes at the same time, live as you type, so you always see which is cheaper and by exactly how many rupees. It goes beyond a single number to show your effective tax rate, your marginal tax rate, the Section 87A rebate and marginal relief, an estimated monthly take-home, a regime comparison card, and a full slab-wise breakdown.

Whether you are planning investments for the current financial year, computing advance tax, deciding which regime to choose at ITR time, or simply trying to understand what share of your income goes to the government - this calculator gives you the clarity to decide before March 31st, not after.

The New Features - What You Get Here That Other Income Tax Calculators Don't

Most income tax calculators force you to pick one regime, then return a single tax number. This calculator layers on seven tools that turn that number into a complete, honest picture:

1. Both Regimes, Always Compared. You never have to rerun the tool to try the other regime. Both the old and new regime tax are computed together, the cheaper one is highlighted, and the exact rupee savings are shown in the Old vs New Regime Comparison card. This is the single most useful answer for most taxpayers - and most calculators do not hand it to you directly.

2. Effective Tax Rate. Instead of just the tax amount, you see what share of your gross income actually goes to tax. A Rs 15 lakh earner paying Rs 90,000 pays an effective rate of 6% - far below the headline 30% slab. This number makes your true tax burden instantly clear and comparable across incomes.

3. Estimated Monthly Take-Home. The calculator works out your gross income minus tax and expresses it as a monthly figure. This connects your annual tax to the number on your payslip, so you can see the real rupees that stay in your pocket each month under your chosen regime.

4. Marginal Tax Rate. This insight tells you the rate applied to the last rupee of your income - the tax rate on your next raise. It answers the practical question: how much of my next promotion will the government keep? For example, earning just above Rs 24 lakh under the new regime puts your marginal rate at 30%.

5. Section 87A Rebate with Marginal Relief. Most calculators apply the 87A rebate crudely and stop. This one also applies marginal relief - the rule that makes income just above the Rs 12 lakh (new regime) or Rs 5 lakh (old regime) limit pay only the amount by which it exceeds the limit, instead of the full slab tax. The breakdown shows the exact rupees saved.

6. Surcharge Handling. For high earners, an additional surcharge applies on the tax - 10% above Rs 50 lakh, 15% above Rs 1 crore, and up to 25-37% above Rs 2 crore depending on the regime. This calculator includes it so your number is not misleadingly low for large incomes.

7. Slab-wise Breakdown and Donut. A collapsible table shows exactly how each slab of your income is taxed, plus the rebate or marginal relief, surcharge, and 4% health and education cess that build your final liability. A donut shows the split between tax and the income you keep in hand at a glance.

How Indian Income Tax Actually Works - The Six-Step Process

Income tax for individuals follows a structured process. Understanding each step helps you see exactly where your liability comes from:

• Step 1 - Gross Total Income: Sum all income sources: salary, house property income, interest, and income from other sources. The gross salary here is the income before your own deductions.
• Step 2 - Standard deduction: Salaried individuals claim a standard deduction - Rs 75,000 under the new regime (FY 2025-26 onwards) and Rs 50,000 under the old regime.
• Step 3 - Deductions and exemptions (old regime only): Subtract eligible deductions such as 80C, 80CCD(1B), 80D, 80G, 80E, 80TTA, HRA exemption, and home loan interest. Under the new regime, none of these are available.
• Step 4 - Apply slab rates: Tax is calculated progressively. You pay a lower rate on the earlier slabs and a higher rate only on the income sitting in the higher slab - you never pay the top rate on your entire income.
• Step 5 - Rebate, surcharge and cess: The Section 87A rebate (with marginal relief) applies for lower incomes, a surcharge applies for very high incomes, and a 4% Health and Education Cess is added on the tax.
• Step 6 - The final liability: The total is the amount you must pay as tax for the year, either through TDS by your employer or through advance tax and self-assessment tax.

New Regime Tax Slabs for FY 2025-26 - The Default Option

From FY 2023-24 the new regime is the default. If you do not explicitly choose the old regime, you are automatically placed under the new one. The slab structure for FY 2025-26 and 2026-27:

• Rs 0 to Rs 4,00,000: Nil
• Rs 4,00,001 to Rs 8,00,000: 5%
• Rs 8,00,001 to Rs 12,00,000: 10%
• Rs 12,00,001 to Rs 16,00,000: 15%
• Rs 16,00,001 to Rs 20,00,000: 20%
• Rs 20,00,001 to Rs 24,00,000: 25%
• Above Rs 24,00,000: 30%

Section 87A rebate: If your total income does not exceed Rs 12 lakh, your entire tax liability (before cess) is rebated - making Rs 12 lakh effectively tax-free. Combined with the Rs 75,000 standard deduction, a gross salary of about Rs 12.75 lakh results in zero tax under the new regime. This calculator applies the rebate AND the marginal relief that protects taxpayers just above the Rs 12 lakh line.

Old Regime Tax Slabs - When Deductions Make It Worthwhile

The old regime keeps a wider deduction base with a different slab structure:

• Rs 0 to Rs 2,50,000: Nil (Rs 3,00,000 for 60+, Rs 5,00,000 for 80+)
• Rs 2,50,001 to Rs 5,00,000: 5%
• Rs 5,00,001 to Rs 10,00,000: 20%
• Above Rs 10,00,000: 30%

The Section 87A rebate under the old regime applies when total income is up to Rs 5 lakh, with a maximum rebate of Rs 12,500. The old regime becomes better when your deductions exceed roughly Rs 3.75 to 4 lakh for someone earning around Rs 15 lakh. At Rs 15 lakh income with Rs 5 lakh in deductions, old regime tax can be several thousand rupees lower than the new regime. This calculator shows both totals side by side so you never have to guess.

Deductions That Make the Old Regime Powerful

• Section 80C (Rs 1,50,000): EPF contribution (12% of basic), PPF investment, ELSS mutual funds, children's tuition, home loan principal, and life insurance premium.
• Section 80CCD(1B) NPS (Rs 50,000): An additional NPS contribution over and above 80C, available to anyone.
• Section 80D (Rs 25,000 to Rs 1,00,000): Health insurance premiums for self, family, and parents - more for senior citizen parents.
• HRA Exemption: The minimum of actual HRA received, rent paid minus 10% of basic plus DA, or 50% of basic plus DA in a metro city (40% non-metro).
• Home loan interest Section 24(b) (up to Rs 2,00,000): For a self-occupied property, with full interest deductible for a let-out property.
• Standard deduction: Rs 50,000 for salaried individuals.

Enter these in the deductions section of the calculator to see how much they lower your old-regime taxable income - and whether that makes the old regime cheaper for you.

Understanding Effective Rate vs Marginal Rate

These two numbers are frequently confused, yet both matter. The effective tax rate is your total tax divided by your gross income - the average share of every rupee that goes to tax. The marginal tax rate is the rate applied to your last rupee of income - the tax you would pay on your next increment. Because tax is progressive, your marginal rate is always higher than your effective rate. The calculator shows both, so you can talk about your true burden (effective) and your next-raise impact (marginal) correctly.

Section 87A Rebate and Marginal Relief - Explained

The Section 87A rebate is what makes lower incomes effectively tax-free. Under the new regime, if your total income is up to Rs 12 lakh, the computed tax is fully rebated. But without an extra rule, someone earning Rs 12.1 lakh would suddenly pay the full slab tax of about Rs 67,500 - a punishing jump. The marginal relief rule prevents this: where your income exceeds Rs 12 lakh by a small amount, your tax is limited to just that excess. So an income of Rs 12.1 lakh pays around Rs 10,000 in tax, not Rs 67,500. This calculator applies that relief and shows the rupees saved in the breakdown, a nuance most tools skip.

Advance Tax - When You Need to Pay Before March 31st

If your total estimated tax for the year exceeds Rs 10,000 after accounting for TDS, you may owe advance tax in instalments throughout the year:

• 15% of estimated tax by 15 June
• 45% of estimated tax by 15 September
• 75% of estimated tax by 15 December
• 100% of estimated tax by 15 March

Non-payment or under-payment attracts interest under Sections 234B and 234C. For most salaried employees with only salary income, employer TDS covers the full liability - advance tax is mainly relevant if you have substantial other income. Use the total tax from this calculator to gauge whether you fall in the advance tax bracket.

Frequently Asked Questions About Income Tax