Estimate your total income for the financial year
Add income from salary, business, capital gains, rent, interest, and other sources
Apply the applicable income tax slab rates to the estimated taxable income
Add surcharge, if applicable
Add health and education cess
Subtract eligible deductions and exemptions
Subtract TDS, TCS, and any other tax already paid
The remaining amount is your advance tax liability
Divide the advance tax liability into installments as per due dates
Pay each installment based on the percentage due by that date
Recalculate if your income changes during the year and pay any shortfall