Income Tax Calculator
Compare "Regime A" (with deductions) against "Regime B" (flat structure). Customize tax brackets dynamically to match your local government policies.
Regime A Brackets
Slabs applied after deducting 0
Regime B Brackets
Slabs applied directly to Gross Income
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Capital Gains Tax Calculator
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HRA Exemption Calculator
Determine your HRA exemption under Section 10(13A) of Income Tax Act
Standard Deduction Calculator
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Tax Saving Investment Calculator
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NPS Calculator
Estimate NPS corpus and additional tax benefits under Section 80CCD(1B)
What Is an Income Tax Calculator (Old vs New Regime)?
An Income Tax Calculator helps Indian taxpayers estimate their annual tax liability under both the old tax regime (with deductions and exemptions) and the new tax regime (introduced in Budget 2020 with lower rates but fewer deductions). The old regime allows taxpayers to claim deductions under Chapter VI-A — including Section 80C up to ₹1.5 lakh (PPF, ELSS, life insurance premiums), Section 80D for health insurance, Section 24(b) on home loan interest, and HRA exemption under Section 10(13A). The new regime offers lower slab rates but eliminates most deductions and exemptions, making it ideal for those with minimal investments or housing expenses.
For the financial year 2024-25 (Assessment Year 2025-26), the old regime retains the basic exemption limit of ₹2.5 lakh (₹3 lakh for senior citizens and ₹5 lakh for super senior citizens) and the 5%, 20%, and 30% slab structure plus a 4% health and education cess. The new regime revised in Budget 2023 now offers an enhanced exemption limit of ₹3 lakh, six income slabs ranging from 0% to 30%, and a standard deduction of ₹50,000 for salaried employees. Taxpayers who do not opt for the concessional regime automatically default to the new regime, though they can switch annually by filing Form 10-IEA if they have business income.
Choosing between the two regimes requires a detailed comparison of one's investment portfolio, housing loan status, health insurance premiums, and other deductible expenses. A taxpayer investing heavily in Section 80C instruments and paying high rent or home loan interest typically benefits more from the old regime. Conversely, salaried individuals with minimal investments or those who prefer simplicity often fare better under the new regime due to lower rates and the absence of compliance burden. The calculator performs this comparison automatically, helping users select the regime that minimises their tax outgo and maximises their take-home pay.
How to Use This Calculator
Step 1: Select Your Tax Regime
Choose between the old tax regime (with deductions) and the new tax regime (concessional rates). The calculator will compute liability under both for comparison, helping you decide which regime suits your financial profile.
Step 2: Enter Your Gross Annual Income
Input your total income from all sources — salary (after standard deduction), business or profession income, capital gains, rental income from house property, and income from other sources like fixed deposits and savings accounts.
Step 3: Claim Deductions (Old Regime Only)
Enter eligible deductions under Chapter VI-A such as 80C (PPF, ELSS, EPF, life insurance), 80D (health insurance premiums up to ₹25,000 for self and ₹50,000 for senior parents), 80E (education loan interest), and Section 24(b) home loan interest.
Step 4: Include Exemptions (Old Regime Only)
Enter HRA (House Rent Allowance), LTA (Leave Travel Allowance), and other allowances where applicable. The calculator will apply the least of the exempt amounts as per the Income Tax Act rules.
Step 5: Compare and Choose
Review the tax computed under both regimes side by side, including cess at 4%. The calculator highlights the lower liability and shows the potential savings. Select the regime that results in maximum take-home income.
Real-World Example
Meet Arjun Mehta. Arjun is a 32-year-old software engineer in Bengaluru earning ₹18 lakh per annum. He contributes ₹1.5 lakh to EPF and PPF, pays ₹36,000 annually for health insurance, and has a home loan on which he pays ₹2.4 lakh in annual interest.
Using the Income Tax Calculator to compare both regimes:
Gross Total Income
₹18,00,000
Deductions (Old Regime)
₹4,26,000
Taxable Income (Old)
₹13,74,000
Tax Under Old Regime
₹2,00,460
Tax Under New Regime
₹1,64,400
Savings with New Regime
₹36,060
Despite Arjun's significant investments, the new regime's lower slab rates still result in lower tax. However, if he increased his 80C investments and had higher housing expenses, the old regime could become more favourable. The calculator helps him make this precise decision every financial year.
Income Tax Calculation Formula
Income tax is computed by applying progressive slab rates to taxable income after deducting all eligible exemptions and deductions from gross total income. A 4% health and education cess is applied to the computed tax. For the old regime, deductions under Chapter VI-A and exemptions such as HRA and LTA are subtracted. For the new regime, only the standard deduction is available.
Frequently Asked Questions
There is no universal answer. The old regime benefits taxpayers who make substantial investments in 80C instruments (PPF, ELSS, EPF), pay high health insurance premiums, have home loan interest under Section 24(b), or receive HRA. The new regime is better for those with minimal deductions, prefer simplicity, or have income primarily from salary with the standard deduction. Always compare both regimes using a calculator before deciding.
Salaried individuals can switch between regimes every year by choosing the one that minimises their tax. However, taxpayers with business or professional income must file Form 10-IEA to opt out of the new regime and can switch only once, after which they revert to the new regime by default. It is advisable to plan regime selection based on multi-year projections.
The old regime allows Section 80C (up to ₹1.5 lakh), 80CCD(1B) for NPS (additional ₹50,000), Section 80D for health insurance, Section 24(b) on home loan interest (up to ₹2 lakh for self-occupied property), HRA exemption under Section 10(13A), LTA under Section 10(5), and standard deduction of ₹50,000. These are not available under the new regime except the standard deduction.
Super senior citizens aged 80 years and above have a basic exemption limit of ₹5 lakh under the old regime and are exempt from filing returns if their income only comprises pension and bank interest within specified limits. Under the new regime, there is no age-based distinction in slab rates — all individuals are taxed at the same rates regardless of age.
The Alternative Minimum Tax (AMT) under Section 115JC applies to non-corporate taxpayers who claim deductions under certain provisions and whose adjusted total income exceeds ₹20 lakh. AMT is calculated at 18.5% of adjusted total income, and the excess over regular tax can be carried forward for set-off in up to 15 subsequent assessment years.
Under the old tax regime, the basic exemption limit is ₹2.5 lakh for individuals below 60 years, ₹3 lakh for senior citizens (60 to 79 years), and ₹5 lakh for super senior citizens (80 years and above). The new regime offers a uniform exemption limit of ₹3 lakh for all individuals regardless of age, with no additional age-based benefits.
Freelance and gig economy income is taxed under the head "Profits and Gains of Business or Profession." Freelancers can claim deductions for actual business expenses such as internet bills, equipment costs, coworking space rent, and travel. They must file ITR-3 or ITR-4 depending on turnover, and are required to get their accounts audited if turnover exceeds ₹50 lakh. TDS at 1% to 10% may be deducted by clients under Section 194J or 194C.
Tax Deducted at Source (TDS) is income tax deducted by the payer at the time of payment and deposited with the government on your behalf. Common TDS rates include 10% under Section 194A for interest on fixed deposits above ₹40,000, 10% under Section 194I for rent, and 10% under Section 194J for professional fees. TDS is credited against your total tax liability when filing the ITR, and any excess TDS can be claimed as a refund.
Yes, donations to specified charitable institutions qualify for deduction under Section 80G. Donations to the Prime Minister's National Relief Fund (PMNRF) and Chief Minister's Relief Fund qualify for 100% deduction without any qualifying limit. Donations to other approved charities qualify for 50% or 100% deduction subject to a limit of 10% of adjusted gross total income. The donation must be made by cheque, online transfer, or DD, and a valid 80G receipt must be obtained.
If you miss the ITR filing deadline (usually July 31), you can file a belated return under Section 139(4) by December 31 of the assessment year. A late filing fee of ₹5,000 applies if the return is filed after the due date but before December 31, and ₹10,000 if filed after December 31. For taxpayers with total income below ₹5 lakh, the maximum late fee is ₹1,000. Additionally, interest under Section 234A at 1% per month applies on the outstanding tax liability.
Key Takeaways
The old regime offers extensive deductions but has higher slab rates; the new regime has lower rates but minimal deductions — always compare both.
Section 80C deductions up to ₹1.5 lakh (EPF, PPF, ELSS, life insurance, tuition fees) are the most common reason to choose the old regime.
Home loan interest under Section 24(b) up to ₹2 lakh for self-occupied property is a significant deduction available only in the old regime.
The new regime defaults from FY 2023-24; salaried employees must explicitly opt for the old regime through their employer each year.
Health and education cess at 4% applies to the tax computed under both regimes and is not deductible or avoidable.
Why This Matters
Income tax is the largest direct tax liability for most Indian earners, and choosing the wrong regime can cost tens of thousands of rupees annually. The decision between old and new regimes involves complex trade-offs between current deductions and future tax rates. With the government periodically revising slab rates and deduction limits, staying updated is essential. Moreover, proper tax planning through Section 80C, 80D, and NPS contributions not only reduces tax but also builds long-term financial security. An income tax calculator empowers taxpayers to make data-driven decisions, optimise their investment strategy, and ensure compliance with the Income Tax Act provisions, ultimately maximising their disposable income and financial well-being.
This calculator is for educational and planning purposes. Consult a qualified professional for personalized advice.