December 2025 Deadlines– From ITR Updates to PAN–Aadhaar Linking – Key Dates You Must Not Miss

December Deadlines: A new set of financial rules and deadlines will come into effect in December for the general public, bank customers, taxpayers, and pensioners. While many important deadlines passed in November, several compliance requirements remain to be met during December. Taxpayers and bank customers should be aware of these deadlines to avoid transaction disruptions or penalties.

December 10: New ITR filing deadline for tax audit cases

The Central Board of Direct Taxes (CBDT) last month extended the last date for filing income tax returns for tax audit cases from October 31, 2025, to December 10, 2025.

This extension is a big relief for taxpayers whose returns require mandatory audit and require detailed financial statements and additional information (financial disclosures and updates).

December 31: Deadline for linking Aadhaar-PAN

If you have made your Aadhaar before October 1, 2024, then your PAN-Aadhaar must be linked by December 31, 2025. If you miss this deadline, your PAN will become inactive, directly affecting banking transactions, filing income tax returns, investments, and other financial services. Therefore, it’s important to link your PAN with Aadhaar on time to ensure it remains active.

December 31: Last date for filing late and revised ITR

December 31, 2025, is the last date for filing belated and revised returns for the financial year 2024–25. A belated return is one filed after missing the original deadline. You will be required to pay a late filing fee, which is a maximum of Rs 1,000. If your income is less than Rs 5 lakh, you will be charged a late fee of Rs 1,000, plus interest on the outstanding tax. A revised return is one filed to correct any errors or omissions in a previously filed ITR. It can also be filed by December 31st.

After this date, taxpayers will no longer have access to either option and will only be able to file ITR-U (Updated Return). Although errors in ITR-U can be corrected later, they incur significant penalties, ranging from 25% to 50% of the tax and interest, depending on how late the return was filed. Therefore, December is the last and most economical opportunity for taxpayers who missed earlier deadlines or want to correct their returns.