Compliance Calendar – October 2025 (Checklist & Deadlines)

October 2025 Compliance Calendar for Startups, Businesses and Individuals 

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Staying compliant with statutory deadlines is critical for businesses in India. Missing due dates for GST, TDS, TCS, MCA, PF, ESI, or LLP filings can lead to penalties and unnecessary scrutiny.
This article provides a comprehensive Compliance Calendar for October 2025, covering all important tax, GST, corporate, and labor law deadlines.

Why a Compliance Calendar Matters for October 2025

• Ensures timely filing of GST returns, TDS, and MCA forms
• Avoids late fees, interest, and penalties under Income Tax Act, Companies Act, and GST law
• Simplifies regulatory management for startups, SMEs, corporates, and LLPs
• Helps CFOs, compliance officers, and founders plan finance and accounting workflows

Quick View: Compliance Calendar for October 2025

Date	Compliance	Applicable Form / Return
7th Oct (Tue)	Deposit of TDS/TCS for September 2025	Challan ITNS-281
10th Oct (Fri)	GST Returns for TDS/TCS Deductors	GSTR-7 & GSTR-8
11th Oct (Sat)	Monthly GST Filing for September 2025	GSTR-1
13th Oct (Mon)	GST IFF (QRMP, optional)	Invoice Furnishing Facility
	GST Filing for NRTP & ISD	GSTR-5 & GSTR-6
14th Oct (Tue)	Filing with MCA	Form ADT-1 (Auditor Appointment/Reappointment)
15th Oct (Wed)	TDS Certificates for Q2 (July–Sept)	Form 16A & 27D
	Professional Tax (Monthly)	State-specific
	PF & ESI Contributions	ECR Filing
20th Oct (Mon)	Monthly GST Filing	GSTR-3B
	OIDAR Services Filing	GSTR-5A
29th Oct (Wed)	TDS Challan-cum-Statements	Forms 26QB, 26QC, 26QD, 26QE
30th Oct (Thu)	LLP Filing with MCA	Form 8 LLP (Statement of Accounts)
31st Oct (Fri)	Company Annual Return Filing	Form AOC-4 / AOC-4 XBRL*
	MSME Return Filing	Form MSME-1 (HY Sept 2025)
	Quarterly TDS/TCS Returns (Q1 FY 25-26)**	Form 24Q, 26Q, 27Q, 27EQ

* Applicable if AGM held on September 30, 2025
** For April–June 2025 quarter

Detailed Checklist of October 2025 Compliances

1. Income Tax & TDS/TCS Deadlines

• 7th Oct 2025 – Deposit TDS/TCS for September
• 15th Oct 2025 – Issue TDS Certificates (Form 16A & 27D) for Q2
• 29th Oct 2025 – Furnish Challan-cum-Statements for TDS u/s 194-IA, 194-IB, 194M, 194S
• 31st Oct 2025 – File Quarterly TDS/TCS Returns for Q1 (Forms 24Q, 26Q, 27Q, 27EQ)

2. GST Compliance for October 2025

• 10th Oct – GSTR-7 (TDS) & GSTR-8 (TCS)
• 11th Oct – GSTR-1 (Monthly filers)
• 13th Oct – GSTR-1 IFF (QRMP, optional), GSTR-5 (NRTP), GSTR-6 (ISD)
• 20th Oct – GSTR-3B (Monthly filers), GSTR-5A (OIDAR service providers)

3. MCA / Corporate Law Deadlines

• 14th Oct – Form ADT-1 for appointment/reappointment of Statutory Auditors (if AGM held in Sept)
• 30th Oct – LLP Form 8 (Statement of Accounts & Solvency for FY 24-25)
• 31st Oct – Form AOC-4 / AOC-4 XBRL for annual financial statements (if AGM held on Sept 30, 2025)

4. MSME & Labor Law Compliances

• 15th Oct –
  • Professional Tax Payment/Return (varies by state)
  • PF & ESI contributions for September 2025
• 31st Oct – MSME-1 filing for half year ended Sept 30, 2025

Key Takeaways for Businesses

• Track State-wise PT deadlines – dates may differ across states.
• PF/ESI must be filed on or before 15th Oct to avoid interest.
• Companies & LLPs must finalize audit and financial statements early to avoid last-minute rush.
• MSMEs must ensure vendor payments disclosure through MSME-1 filing.

Pro-Tips to Stay Compliant in October 2025

1. Maintain a compliance tracker with responsibility allocation.
2. Enable auto-reminders in your compliance calendar (Google/Outlook).
3. Reconcile GST data with books before filing GSTR-3B.
4. For MCA filings, check if AGM was held in September to determine AOC-4/ADT-1 applicability.
5. Engage a VCFO or compliance partner to manage overlapping GST, TDS, and MCA deadlines.

Conclusion

The Compliance Calendar for October 2025 includes critical GST, Income Tax, MCA, and labor law deadlines. Businesses should plan filings well in advance to avoid penalties and stay audit-ready.
For startups, SMEs, and corporates, outsourcing compliance management to professionals ensures peace of mind and uninterrupted growth.

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