What is the New vs Old Tax Calculator?
India's personal income tax system offers two distinct regimes — the Old Tax Regime with its extensive deductions and exemptions, and the New Tax Regime introduced in Budget 2020 and significantly revamped in Budget 2023. For FY 2025-26 and FY 2026-27, the New Regime is the default, with a basic exemption limit of ₹3 lakh and a rebate under Section 87A making income up to ₹7 lakh effectively tax-free. The Old Regime retains its appeal through deductions like Section 80C (up to ₹1.5 lakh), Section 80D (health insurance), HRA, LTA, and home loan interest under Section 24(b).
The challenge for every salaried employee and self-employed professional is that neither regime is universally better. Your optimal choice depends entirely on your salary structure, investment habits, housing situation, and family expenses. A person paying ₹24,000/month in home loan interest and maxing out 80C will often save more under the Old Regime, while a young professional with no loans or major investments may pay less tax under the New Regime's lower slab rates.
This calculator eliminates the guesswork. By entering your income details and eligible deductions, you instantly see your tax liability under both regimes side-by-side, so you can make an informed, numbers-backed choice before the financial year begins or before you submit your investment declaration to your employer.
How does it work?
The calculator computes your taxable income and final tax liability separately under each regime. Under the Old Regime, it starts with your gross income, subtracts the standard deduction of ₹50,000 (for salaried individuals), then applies all eligible deductions you enter — 80C investments (PPF, ELSS, EPF, LIC up to ₹1.5 lakh), 80D health insurance premiums (₹25,000 for self, ₹50,000 for senior citizen parents), HRA exemption based on the least of: actual HRA received, 50%/40% of basic salary (metro/non-metro), or rent paid minus 10% of basic salary, and home loan interest under Section 24(b) up to ₹2 lakh for self-occupied property. The resulting taxable income is then taxed at Old Regime slabs: 0% up to ₹2.5 lakh, 5% from ₹2.5–5 lakh, 20% from ₹5–10 lakh, and 30% above ₹10 lakh.
Under the New Regime, the calculator applies only the standard deduction of ₹75,000 (enhanced in Budget 2024, effective FY 2024-25 onwards) and the employer's NPS contribution under Section 80CCD(2), which remains available in the New Regime. No other deductions apply. The revised New Regime slabs are: 0% up to ₹3 lakh, 5% from ₹3–7 lakh, 10% from ₹7–10 lakh, 15% from ₹10–12 lakh, 20% from ₹12–15 lakh, and 30% above ₹15 lakh. The Section 87A rebate makes net tax zero if taxable income does not exceed ₹7 lakh under the New Regime.
After computing base tax under each regime, the calculator adds a 4% Health and Education Cess on the tax amount, and applies surcharge if applicable (10% for income between ₹50 lakh and ₹1 crore; 15% for ₹1–2 crore). The final output shows you your net tax payable, effective tax rate, and annual savings under the better regime — giving you a clear, actionable comparison.
Worked example
Consider Priya, 34, a software engineer in Pune earning a CTC of ₹14 lakh per annum. Her basic salary is ₹6 lakh, HRA is ₹2.4 lakh, and she pays ₹18,000/month in rent. She contributes ₹72,000/year to EPF, invests ₹60,000 in PPF, and pays ₹24,000 annually as health insurance premium for herself and her parents (mother is a senior citizen). She also has a home loan in her hometown with ₹1.5 lakh interest paid during the year. Under the Old Regime, her 80C total (EPF + PPF) reaches ₹1.32 lakh, HRA exemption works out to approximately ₹1.26 lakh, Section 80D covers ₹24,000, and Section 24(b) covers ₹1.5 lakh. After all deductions, her taxable income falls to roughly ₹7.68 lakh, resulting in a tax liability of about ₹77,400 including cess.
Under the New Regime with only the ₹75,000 standard deduction, her taxable income is ₹13.25 lakh, and her tax liability comes to approximately ₹1,56,000 including cess. The Old Regime saves Priya close to ₹78,600 per year — which she can verify instantly using this calculator. For Priya, the choice is clear. However, a colleague earning the same CTC but with no home loan, paying no rent (living with parents), and making minimal 80C investments would likely pay less under the New Regime.
When to use this calculator
- 1At the start of each financial year (April) when submitting your investment declaration to your employer's HR or payroll team, since this locks in your TDS deduction basis for the year.
- 2When you receive a salary hike or promotion that pushes your income into a new slab, as the optimal regime can shift significantly with even a ₹1–2 lakh increase in CTC.
- 3Before starting or stopping major deduction-driving commitments such as a home loan, a child's tuition (Section 80C via Sukanya Samriddhi or tuition fees), or a term insurance policy.
- 4When filing your ITR between July and December, especially if you are a salaried individual who wants to switch regimes from what your employer deducted TDS under — you can switch at the time of filing.
- 5If you are self-employed or have business income, you need this calculator before the financial year begins since you can switch out of the New Regime only once in a lifetime if you have business income.
Common mistakes to avoid
- ✕Assuming the New Regime is always better after the Budget 2023 revamp — this is true only for individuals with low deductions. Those with home loans, HRA, and full 80C utilization frequently save more under the Old Regime.
- ✕Forgetting that HRA exemption, LTA, and Section 24(b) home loan interest deductions are completely disallowed under the New Regime — many taxpayers underestimate these amounts and make the wrong switch.
- ✕Not accounting for the employer's NPS contribution (Section 80CCD(2)), which is available in the New Regime and can significantly reduce taxable income for those whose employers offer NPS — this deduction is often overlooked entirely.
- ✕Letting the employer default them into the New Regime without running the comparison — since the New Regime is now the default, employees who do not proactively submit a declaration are taxed under New Regime even if Old Regime would have been cheaper.
- ✕Comparing regimes using gross CTC instead of net taxable income components, which leads to inaccurate estimates — the correct comparison must use actual basic salary, actual HRA received, and actual deduction amounts rather than approximate or rounded figures.
Frequently asked questions
- Can I switch between the Old and New Tax Regime every year?
- Salaried individuals and those without business income can switch between the Old and New Regime every financial year at the time of filing their ITR. However, if you have income from business or profession, you can opt out of the New Regime only once. After that, you cannot switch back to the New Regime in future years. It is advisable for business owners to carefully evaluate before switching.
- Is the ₹7 lakh tax-free limit applicable to the Old Regime as well?
- No. The enhanced Section 87A rebate making income up to ₹7 lakh tax-free applies exclusively to the New Tax Regime for FY 2025-26. Under the Old Regime, the Section 87A rebate limit is ₹5 lakh (i.e., net taxable income up to ₹5 lakh results in zero tax after rebate). This is one of the most significant advantages of the New Regime for individuals with income between ₹5 lakh and ₹7 lakh who have limited deductions.
- Which deductions are still allowed under the New Tax Regime?
- The New Regime allows a standard deduction of ₹75,000 for salaried employees and pensioners, employer's contribution to NPS under Section 80CCD(2) (up to 10% of salary for private sector, 14% for government employees), deduction for agniveer corpus fund under Section 80CCH, and exemption on gratuity and leave encashment within prescribed limits. All other major deductions including 80C, 80D, HRA, LTA, and Section 24(b) home loan interest are not available.
- What is the break-even deduction amount above which Old Regime becomes better?
- As a general rule of thumb for FY 2025-26, if your total eligible deductions (beyond the standard deduction) exceed approximately ₹1.5–3.75 lakh depending on your income bracket, the Old Regime typically results in lower tax. For income around ₹10–12 lakh, total deductions above roughly ₹3 lakh usually make the Old Regime beneficial. However, this break-even point shifts with income, so running the actual calculation with your specific numbers using this calculator is essential rather than relying on thumb rules.
- Does choosing the New Regime affect my EPF or PPF investments?
- No. Your choice of tax regime has no impact on your ability to invest in EPF, PPF, ELSS, NPS, or any other instrument. You can continue investing in all these products regardless of which regime you choose. The only difference is that under the New Regime, these investments do not reduce your taxable income — you simply do not get the Section 80C deduction benefit. The investments themselves, including their returns and maturity proceeds, are governed by their own rules (e.g., PPF maturity remains tax-free under both regimes).