The guide
How the TDS calculator works
What the TDS calculator does
Enter your annual salary and get an estimate of the tax deducted at source each month, the annual income tax, and your effective tax rate. It uses the new tax regime, which is the default for salaried employees, so you can see roughly how much of your CTC will not reach your account.
How the calculation works
The calculator applies the new-regime slabs for FY 2024-25 after the ₹75,000 standard deduction: nil up to ₹3,00,000, then 5% to ₹7,00,000, 10% to ₹10,00,000, 15% to ₹12,00,000, 20% to ₹15,00,000 and 30% above that. Taxable income up to ₹7,00,000 pays nothing because of the Section 87A rebate. A 4% health and education cess is added to the tax. Monthly TDS = annual tax ÷ 12. It does not include surcharge on incomes above ₹50 lakh, old-regime deductions such as 80C or HRA, or employer-specific perquisites.
Worked example
Annual salary ₹15,00,000. After the ₹75,000 standard deduction, taxable income is ₹14,25,000. Tax: 5% on ₹4,00,000 = ₹20,000; 10% on ₹3,00,000 = ₹30,000; 15% on ₹2,00,000 = ₹30,000; 20% on ₹2,25,000 = ₹45,000. Total ₹1,25,000, plus 4% cess = ₹1,30,000 a year, about ₹10,833 a month, an effective rate of 8.7% on gross salary.
New regime or old regime?
The new regime has lower slab rates and almost no deductions. The old regime has higher rates but allows HRA, 80C investments up to ₹1,50,000, 80D health insurance, home loan interest and more. If your deductions add up to a large share of income, the old regime can win; if not, the new regime usually does. This calculator shows the new regime only. Your employer will ask you to pick one at the start of the year, and you can switch when filing your return.
Why your payslip may differ
Employers spread the annual tax across the months remaining in the financial year, so TDS is higher if you join mid-year or get a hike. Bonuses are often taxed in the month paid. Perquisites such as company car or ESOP exercise add taxable value. Investment declarations under the old regime reduce TDS. Treat the figure here as a planning estimate, not your payslip.












