DECEMBER TAX COMPLIANCE DUE DATES

The Ultimate December 2025 Compliance Crunch: Monthly Due Dates + ANNUAL RETURNS! 🗓️🚨

Finance professionals and business owners, brace yourselves. December 2025 is not just about holiday cheer; it is arguably the heaviest compliance month of the year.

Besides the usual monthly grind, we have critical Annual Return deadlines hitting this month. Missing these means substantial penalties and non-compliance flags as we head into 2026.

Here is your master checklist to navigate this busy month.

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THE MONTHLY ROUTINE

🔴 TDS (Tax Deducted at Source)

• Dec 7: Deposit of TDS/TCS collected in November 2025.

🔵 GST (Monthly Filings)

• Dec 11: GSTR-1 (Outward supplies for Nov 2025).

• Dec 20: GSTR-3B (Summary return & payment for Nov 2025). (General deadline).

🟢 Advance Tax (FY 2025-26)

• Dec 15: 3rd instalment of Advance Tax (75% of estimated liability due).

🚨 THE BIG ANNUAL DEADLINES (FY 2024-25) 🚨

This is what makes this December different. Ensure these are prioritized:

Income Tax Audit

• Dec 10: Extended due date for filing ITR for cases requiring Tax Audit (Business/Profession).

The Year-End Grand Finale: December 31st

• GST Annual Return: Filing of GSTR-9 (Annual Return) and GSTR-9C (Reconciliation Statement) for FY 2024-25.

• ITR (Belated/Revised): Last chance to file a Belated ITR or a Revised ITR for FY 2024-25 (AY 2025-26).

💡 The Game Plan: The period between Dec 10th and Dec 31st is packed. Do not wait until the last week for GSTR-9/9C reconciliations. Get your data to your CA/tax team immediately.

Finish strong, stay compliant, and enter 2026 worry-free!