Let me break it down for your learning :
Taxable income can be reduced with the help of Exceptions and Deductions like below :
- Rent - HRA
- 80 C - PF , Mutual Fund (ELSS only which have 3 years lockin period ) , PPF etc - 1.5 lakhs can be deducted using this
- 80 TTA - its the interest you earn in your savings account (₹10,000 limit)
- Home Loan - If you have home loan can get a exception on interest given (upto ₹2.5 lakhs)
- 80 D - Medical premiums given by employer or your personal term or health insurance (₹25,000 can be exempted)
- 80 CCD(1B) - NPS national pension scheme which give a deduction of ₹50,000
If you use all this in Old Regime you will have to pay less tax compared to new regime which only cover a standard deduction of ₹50,000
But if you don’t have any such exception or deduction then new regime will suit you.