How Income Tax Works
Compare old and new FY 2025-26 regimes inline. The calculator uses the visible inputs, applies the formula below, and rounds rupee outputs to whole numbers so the result is easy to read on mobile.
Formula
Income Tax result = validated inputs → formula calculation → rounded Indian result
Inputs used:
- Annual income
- Old regime deductions
- Tax regime
- Age groupExample Calculation
India-Specific Assumptions
- Income tax slabs use FY 2025-26 defaults in the app constants.
- Cess is estimated at 4% where income tax is calculated.
- All rupee results are rounded to whole rupees for readability.
- Inputs are treated as estimates; actual bank, employer, university, insurer, or tax-office calculations may differ.
- The calculator uses Indian formats, slab concepts, and common FY 2025-26 assumptions where relevant.
Common questions
Which tax year does this income tax calculator use?
It is written for FY 2025-26 assumptions used inside CalcPad. Always verify final filing numbers against the Income Tax Department utility or your tax adviser.
Does the calculator compare old and new tax regimes?
Yes. You can switch regimes and enter deductions to see whether the old regime becomes better for your income profile.
Are deductions counted in the new regime?
Most old-regime deductions are not available in the new regime. The deductions field is mainly useful when comparing the old regime.
Does this include standard deduction?
The calculator uses the app's salary-tax constants, including standard-deduction treatment where the underlying tax logic applies it.
Can I use this number for filing ITR?
Use it for planning and comparison only. Final ITR filing should use official utilities, Form 16, AIS/TIS data, and verified deduction proofs.
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Request a calculator →Disclaimer: This calculator is for general informational and educational purposes only. It is not financial, tax, legal, academic, insurance, or professional advice. Verify important decisions with the relevant official source, employer, bank, university, insurer, or adviser.
Last updated: April 2026