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September 2026 Compliance Calendar: Key Filing Deadlines You Can’t Miss

September is a critical compliance month for businesses. From GST and TDS filings to advance tax and tax audit requirements, finance and compliance teams have several important deadlines to track.

What You’ll Find Inside

September 2026 Compliance Calendar
  • September 2026 GST & tax filing deadlines
  • TDS/TCS deposit deadline – 7 September
  • GSTR-1, GSTR-3B & other GST return dates
  • 2nd Advance Tax instalment – 15 September
  • Tax Audit Report deadline – 30 September
  • AOC-4, MGT-7/MGT-7A annual filing reminders
  • Key penalties and risks of late compliance
  • Practical tips to stay compliance-ready

September 2026 Compliance Calendar: Key Filing Deadlines You Can’t Miss

September is a critical compliance month for businesses. From GST and TDS filings to advance tax and tax audit requirements, finance and compliance teams have several important deadlines to track.

September 2026 Compliance Calendar

What You’ll Find Inside

  • September 2026 GST & tax filing deadlines
  • TDS/TCS deposit deadline – 7 September
  • GSTR-1, GSTR-3B & other GST return dates
  • 2nd Advance Tax instalment – 15 September
  • Tax Audit Report deadline – 30 September
  • AOC-4, MGT-7/MGT-7A annual filing reminders
  • Key penalties and risks of late compliance
  • Practical tips to stay compliance-ready

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September 2026 Compliance Calendar: Key Filing Deadlines You Can’t Miss

September is a critical compliance month for businesses. From GST and TDS filings to advance tax and tax audit requirements, finance and compliance teams have several important deadlines to track.