Income Tax Calculator - Old vs New Regime | Tax Calculator

What is Income Tax in India?

Income tax is a direct tax levied by the Central Government of India on the income earned by individuals, Hindu Undivided Families (HUFs), and other entities during a financial year. The Income Tax Act, 1961 governs the rules, slabs, and deductions applicable. Since FY 2020-21, taxpayers can choose between the Old Tax Regime (with deductions and exemptions) and the New Tax Regime (with lower slab rates but fewer deductions). This old vs new tax regime comparison calculator helps you instantly determine which regime results in lower tax liability based on your income and deductions. Use our Salary Calculator to see how income tax impacts your take-home pay.

Key Features of This Income Tax Calculator

• Side-by-side regime comparison — view tax under old and new regimes simultaneously
• Complete deduction inputs — Section 80C, 80D, 80CCD(1B) NPS, HRA exemption, home loan interest (Sec 24b), and other deductions
• Age-based slabs — supports below 60, senior citizens (60–80), and super senior citizens (above 80)
• Slab-wise breakdown table — detailed table showing tax computation at each slab level for both regimes
• Health & Education Cess — automatically adds 4% cess on computed tax
• Section 87A rebate — applies rebate where eligible, reducing tax to nil
• Regime recommendation — highlights which regime saves you more tax and by how much
• Visual comparison chart — bar chart comparing old vs new regime totals
• Number format options — toggle between exact values, lakhs/crores, and million/billion

Income Tax Formulas — How Tax Is Calculated

How to Use This Tax Calculator — Step-by-Step

1. Enter Gross Annual Income: Input your total annual income before any deductions (salary, business income, interest, etc.).
2. Select Age Group: Choose "Below 60", "60 to 80 (Senior)", or "Above 80 (Super Senior)" — this affects old regime slab rates.
3. Enter Old Regime Deductions: Fill in your Section 80C, 80D, 80CCD(1B), HRA exemption, home loan interest, and any other deductions.
4. Click "Calculate Tax": The calculator computes tax under both regimes side by side.
5. Review the Comparison: Check the regime cards showing taxable income, income tax, cess, total tax, and effective tax rate for each regime.
6. See the Recommendation: The savings banner tells you which regime is better and the amount saved.
7. Check Slab Breakdown: Scroll down to view the slab-wise tax calculation table for both regimes.

New Regime Tax Slabs (FY 2025-26)

Old Regime Tax Slabs (FY 2025-26)

Practical Examples — Old vs New Tax Regime Comparison

Example 1 — Income ₹10,00,000 with no deductions:

• New Regime: Taxable = ₹10,00,000 − ₹75,000 = ₹9,25,000. Tax = ₹52,500. Cess = ₹2,100. Total = ₹54,600
• Old Regime: Taxable = ₹10,00,000 − ₹50,000 = ₹9,50,000. Tax = ₹1,02,500. Cess = ₹4,100. Total = ₹1,06,600
• Savings: New regime saves ₹52,000

Example 2 — Income ₹15,00,000 with ₹4,00,000 deductions (Old Regime):

• Old Regime: Taxable = ₹15,00,000 − ₹50,000 − ₹4,00,000 = ₹10,50,000. Tax = ₹1,17,500. Total with cess = ₹1,22,200
• New Regime: Taxable = ₹15,00,000 − ₹75,000 = ₹14,25,000. Tax = ₹1,53,750. Total with cess = ₹1,59,900
• Savings: Old regime saves ₹37,700

Example 3 — Income ₹7,50,000 (eligible for rebate under new regime):

• New Regime: Taxable = ₹7,50,000 − ₹75,000 = ₹6,75,000. Since taxable income ≤ ₹12L, full rebate applies. Total Tax = ₹0
• Old Regime (no deductions): Taxable = ₹7,00,000. Tax = ₹52,500. Total with cess = ₹54,600

Real-World Use Cases

• Regime selection: Determine whether old or new regime is better before choosing during ITR filing or informing your employer
• Tax-saving investment planning: Calculate how much you need to invest in 80C, 80D, and NPS to make the old regime worthwhile
• Salary negotiation: Estimate post-tax income to evaluate the real value of a salary package
• Advance tax planning: Compute quarterly advance tax payments to avoid interest under Sections 234B and 234C
• Senior citizen planning: Evaluate the higher exemption limits available to seniors under the old regime

Understanding Your Results

The results panel shows a side-by-side comparison for both regimes:

• Taxable Income: Your income after applying standard deduction and (for old regime) all claimed deductions.
• Income Tax: Tax computed by applying the relevant slab rates to taxable income.
• Cess (4%): Health and Education Cess applied on income tax. This is non-deductible.
• Total Tax: Income tax plus cess — the final amount payable to the government.
• Effective Rate: Total tax as a percentage of gross income — a useful metric for comparing overall tax burden.

The savings banner below the cards tells you which regime is more beneficial and the exact savings amount. The slab-wise breakdown table shows tax computed at each slab for transparency.

Tips & Best Practices for Tax Planning

• Maximise 80C investments: Invest ₹1.5 lakh in PPF, ELSS, EPF, or LIC to reduce old-regime taxable income by the maximum amount.
• Claim 80D for health insurance: Premiums up to ₹25,000 (₹50,000 for senior citizens) are deductible. Premiums for parents add another ₹25,000–₹50,000.
• Invest ₹50,000 in NPS: Section 80CCD(1B) provides an additional ₹50,000 deduction over and above 80C.
• Claim HRA if paying rent: HRA exemption can be significant for employees living in metro cities.
• File on time: Late filing attracts penalties under Section 234F (up to ₹5,000) and you lose the ability to carry forward certain losses.
• Revisit your regime choice annually: Your optimal regime may change as your income and deductions change year to year.

Common Mistakes to Avoid

• Choosing the wrong regime blindly: Many taxpayers default to the new regime without checking if their deductions make the old regime cheaper. Always compare both.
• Forgetting the standard deduction: Both regimes offer a standard deduction (₹50,000 old, ₹75,000 new). Ensure it is applied before computing tax.
• Exceeding 80C limits: Section 80C is capped at ₹1.5 lakh. Investments beyond this limit do not reduce taxable income.
• Not accounting for cess: The 4% Health & Education Cess is often overlooked in manual calculations, leading to underestimation of total tax.
• Ignoring surcharge for high incomes: Incomes above ₹50 lakh attract surcharges (10%–37%) that significantly increase tax liability.

Frequently Asked Questions

Q: Which tax regime is better — old or new?

A: It depends on your deductions. If your total deductions (80C + 80D + HRA + NPS + home loan interest) exceed approximately ₹3.75 lakh, the old regime may save more tax. Otherwise, the new regime with lower slab rates and ₹75,000 standard deduction is usually better.

Q: What is the standard deduction in the new tax regime?

A: The new tax regime offers a standard deduction of ₹75,000. Additionally, there is a full rebate under Section 87A for taxable income up to ₹12,00,000, making effective tax-free income ₹12,75,000.

Q: Can I switch between old and new regime every year?

A: Yes, salaried individuals can choose between old and new regime each financial year when filing their income tax return. Business/professional income taxpayers who opted out of the new regime can switch back only once.

Q: Is this tax calculator free and accurate?

A: Yes, this income tax calculator is completely free. It uses the latest FY 2025-26 slab rates for both regimes and includes cess calculation. For precise filing, consult a chartered accountant for surcharge and other specific provisions.