Introduction
Income tax in India is calculated based on tax slabs that determine the rate applied to different income ranges. From FY 2024-25, the new tax regime is the default option with lower rates but no deductions, while the old regime allows Section 80C, HRA, and other exemptions.
Numverto Income Tax Calculator computes tax under both regimes with slab-wise breakdown, 4% cess, and monthly TDS estimate. Read our income tax slabs guide for detailed comparison.
Tax Calculation Method
Tax is computed slab-wise: each income range is taxed at its respective rate. Total tax = sum of slab taxes + 4% Health & Education Cess. Rebate u/s 87A applies if income ≤ ₹7L (new) or ₹5L (old).
Step-by-Step Examples
₹12,00,000 income (New Regime)
Tax: ₹0 (0-3L) + ₹20,000 (3-7L) + ₹30,000 (7-10L) + ₹30,000 (10-12L) = ₹80,000. Cess: ₹3,200. Total: ₹83,200.
₹8,00,000 income (New Regime)
Tax: ₹0 (0-3L) + ₹20,000 (3-7L) + ₹10,000 (7-8L) = ₹30,000. Cess: ₹1,200. Total: ₹31,200.
Real-Life Applications
- Salary tax estimation for salaried professionals
- Comparing new vs old regime for tax planning
- Advance tax calculation for freelancers and businesses
- Monthly TDS estimation for budgeting
- Financial planning and investment decisions based on post-tax income
Advantages of Using This Income Tax Calculator
- Both new and old regime calculation in one tool
- Slab-wise breakdown table for transparency
- Automatic Section 87A rebate application
- 4% cess calculation included
- Monthly TDS estimate for salary planning
Common Mistakes to Avoid
- Confusing Financial Year (FY) with Assessment Year (AY)
- Forgetting 4% cess on computed tax amount
- Not claiming rebate u/s 87A when eligible (income ≤ ₹7L new regime)
- Mixing old and new regime deductions — each has different rules
- Not considering surcharge for income above ₹50L (10%) and ₹1Cr (15%)