Historical vs Current Tax Rules — How to Compare
For FY 2025-26 / AY 2026-27, this section explains the earlier framework. Current Tax Year 2026-27 calculations use the Income-tax Act, 2025 and should be reviewed against the current provisions.
| Feature | Old Regime | New Regime |
|---|---|---|
| Standard Deduction | ₹50,000 | ₹75,000 |
| Section 80C | Up to ₹1.5L | Not available |
| HRA Exemption | Available | Not available |
| Home Loan Interest (Sec 24) | Up to ₹2L | Not available |
| NPS Sec 80CCD(1B) | Up to ₹50K extra | Not available |
| Tax-free up to | ₹5L (with 87A rebate) | ₹12L (with 87A rebate) |
Rule of thumb
For the historical FY 2025-26 / AY 2026-27 comparison, deduction levels can materially change the modeled result. Use the relevant period-specific calculator with your actual inputs and verify the applicable rules.
Key deadlines FY 2025-26
- Advance Tax (Q1): 15 June 2025
- Advance Tax (Q2): 15 September 2025
- Advance Tax (Q3): 15 December 2025
- Advance Tax (Q4): 15 March 2026
- ITR Filing (no audit): 31 July 2026
Source: Income Tax Department, India
About the Tax Calculator — Tax & Salary Guide
This free Tax Calculator is designed specifically for Indian users, using documented calculation methods, with source references shown where applicable. Rules and formulas are reviewed for the applicable current period; tax-year-specific rules are identified on the page. No sign-up, no download, and no charge — results are instant and displayed in Indian number format (lakhs and crores).
How to Use This Calculator
Enter your values in the input fields above and click the Calculate button. Results update immediately. You can modify any input and recalculate as many times as needed. All inputs are processed locally in your browser. Optional Save Setup stores the setup only in your browser; Share Setup creates a URL containing encoded setup values. See the Privacy Policy for details.
Formula and Calculation Method
The Tax Calculator uses the documented calculation method described on this page. Where rules, rates or thresholds can change, review the cited source and effective date shown here before relying on the result for an important decision.
Understanding Your Results
Results are estimates based on the inputs you provide. Actual outcomes can vary with the rules, rates, prices, biological conditions, or other assumptions that apply to your situation. Review the assumptions and effective date shown on this page before using a result for an important decision.
Why Use CalcuTools India
CalcuTools India is an independent, free calculator platform covering personal finance, income tax, salary, loans, investments, retirement planning, and health, with formulas and applicable rules checked against the stated methodology or primary/reference sources where applicable. We are not affiliated with any bank, insurance company, NBFC, or financial products distributor. Our calculators are free to use. Some pages may contain clearly labelled partner or affiliate offers; these do not affect the calculation result.
CalcuTools India · India-focused calculators · Updated September 2026 · About Us · How We Verify · Editorial Policy · Disclaimer