With numerous tax compliance due this month, December requires careful attention from individuals and businesses alike. These four deadlines are a must-see.
Important Date: December is considered one of the busiest months for taxpayers. This month marks several important income tax deadlines. From filing delayed returns to completing TDS and depositing advance tax, many responsibilities need to be fulfilled in December. Here’s a simple and understandable overview of all the key dates for December 2025.
December 10, 2025
December 10 is a crucial date. This is an extended deadline for all taxpayers whose accounts are audited, whether corporate or non-corporate. This includes partners of audited firms and spouses covered under Section 5A.
The original deadline was October 31st, but the government extended it. If your account is audited, you must file your income tax return (ITR) for assessment year 2025–26 by this date.
December 15, 2025
December 15, falling in the middle of the month, is considered the most important date. Several tax-related obligations must be fulfilled on this day:
Uploading Form 27C for the month of November
Submitting Form 24G for TDS/TCS by government departments (for tax paid without a challan)
Depositing the third installment of advance tax, applicable to both individuals and businesses
Issuing TDS certificates for TDS paid in the month of October (under sections 194-IA, 194-IB, 194M, and 194S)
Submitting Form 3BB by stock exchanges related to the November client code change
December 30, 2025
December 30 is also an important date. Accredited associations are required to submit their Client Code Modification Statement for the month of November.
It is necessary to submit a challan-cum-statement for TDS paid in November to complete the TDS record for the entire month.
December 31, 2025
The last day of the year is crucial. This is the last date for filing delayed or revised income tax returns for the assessment year 2025–26, unless the department has already completed your assessment. If you miss this deadline:
You may have to pay penalties and interest
Refunds may be delayed
Some tax benefits may also be lost.
Why is December so important?
December has a series of deadlines, so planning ahead is crucial. Completing these tasks on time can help you avoid stress, penalties, and unnecessary tax problems.
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