ITR Deadline, Dec. 14 -- The Income Tax Return (ITR) deadline for the third instalment of advance tax is due on Monday, 15 December 2025, where all Indian taxpayers will have to pay their advance tax outstandings before the due date to avoid any future penalties.

Advance tax is an instalment of income tax, as per Section 207-219 of the Income Tax Act, under which a taxpayer pays their dues throughout the year before the end of the financial year, giving them an alternative to pay via partial payment instead of a lump sum at the end of the fiscal year.

During a financial year, the taxpayers are eligible to pay their total income tax due through a fixed percentage rate via four instalments on the dates fixed by the Income Tax Department....