Save tax: Save more tax in old tax regime by claiming up to Rs 8.5 lakh tax deductions for a salary income up to Rs 25 lakh. Moreover, for salary income of Rs 15 lakh you need to claim atleast Rs 5,93,750 as tax deductions so as to achieve equilisation level of tax with new tax regime. If you claim more deductions beyond this equilisation point you will save more tax in old tax regime than new.