A worked example
A salaried individual with ₹10,00,000 gross annual income gets the ₹75,000 standard deduction, bringing taxable income to ₹9,25,000. Running that through the new-regime slabs gives a tax of ₹32,500 before rebate — but since taxable income is under ₹12,00,000, the Section 87A rebate wipes it out entirely, leaving zero tax payable.