As we approach the final quarter of the calendar year, Sep 2025 is turning out as a key month for businesses when it comes to regulatory and statutory compliance. More than 15 important deadlines packed in the month of Sep, it is crucial for companies to stay focus. From income tax filling and GST submission, to labor law contributions, and company law requirement, there’s a lot of things to manage to avoid penalties and ensure smooth operation. While specific statutory notification for Sep 2025 has not been issued yet, understanding the expected compliance calendar will help you prepare effectively. Forgetting these deadlines can result to pay fine, interest charges, and compliance risks that may impact business credibility and operations. This blog outlines the most important compliance dates in Sep 2025 to help businesses stay ahead and remain compliant.
Income Tax Compliance
| Sr. No. | Nature of Compliance | Due Date |
| 1 | Deposit of TDS/TCS for the month of August 2025 | 7th Sep 2025 |
| 2 | Issue of TDS Certificate for Tax Deducted u/s 194-IA, 194-IB, 194M, 194S for July 2025 | 15th Sep 2025 |
| 3 | Quarterly Statement of TCS deposited for the quarter ending June 2025 | 15th Sep 2025 |
| 4 | Due date for furnishing statement in Form 3BB by Stock Exchange (related to modified client codes) | 15th Sep 2025 |
| 5 | Furnishing challan-cum-statement for TDS u/s 194-IA, 194-IB, 194M, 194S for July 2025 | 30th Sep 2025 |
| 6 | Issue of TCS certificate for first quarter of FY 2025-26 | 30th Sep 2025 |
| 7 | Quarterly statement of TDS deposited for the first quarter (Ending 30th June 2025) | 30th Sep 2025 |
| 8 | Furnishing of statement of financial transactions u/s 285BA(1) of the Income Tax Act for FY 2025-26 (Form 61A) | 30th Sep 2025 |
GST Compliance
| Sr. No. | Nature of Compliance | Form | Due Date |
| 1 | Filed by person required to deduct TDS under GST for August 2025 | GSTR-7 | 10th Sep 2025 |
| 2 | Filed by e-commerce operators required to collect TCS under GST for August 2025 | GSTR-8 | 10th Sep 2025 |
| 3 | For month of August (Other than QRMP scheme) | GSTR-1 | 11th Sep 2025 |
| 4 | Filed by Non-Resident Taxable Person (NRTP) for August 2025 | GSTR-5 | 13th Sep 2025 |
| 5 | Filed by Input Service Distributor (ISD) for August 2025 | GSTR-6 | 13th Sep 2025 |
| 6 | For month of August (All taxpayers) | GSTR-3B | 20th Sep 2025 |
SEBI Compliance
| Sr. No. | Nature of Compliance | Due Date |
| 1 | Annual Disclosure by large entities to SEBI | 15th Sep 2025 |
| 2 | Statement of Deviation & Variation under SEBI Reg 32(1) (within 60 days of last quarter) | 30th Sep 2025 |
| 3 | Submission of Financial Results along with Auditor/ Limited Review Report under SEBI Reg 33(3)(a) | 30th Sep 2025 |
| 4 | Submission of Secretarial Compliance Report under SEBI Reg 24A (within 60 days from FY-end) | 30th Sep 2025 |
| 5 | Submission of Financial Results along with Auditor Report under SEBI Reg 33(3)(d) (for end of FY) | 30th Sep 2025 |
ROC Compliance (Companies & LLP)
| Sr. No. | Nature of Compliance | Form | Due Date |
| 1 | Limited Liability Partnership (LLP) Annual Return for financial year 2024-25 | Form 11 | 30th May 2025 |
| 2 | Company must file a Half-Yearly report Reconciliation of their Share Capital for this period (Apr 2025 – Sept 2025) | PAS-06 | 30th Sep 2025 |
ESI and EPF Compliance
| Sr. No. | Nature of Compliance | Form | Due Date |
| 1 | Payment and ESIC Return for the month of Aug 2025 | ESI Challan | 15th Sep 2025 |
| 2 | Payment and employees provided fund(EPF) Return for the month of August 2025 | ECR | 15th Sep 2025 |
Conclusion:
The Compliance Calendar for Sep 2025 includes important deadlines for various business obligations this include everything from Income Tax to GST, SEBI, ROC, and ESI/EPF filings. Keeping track of these deadline helps business avoid penalties and legal compliance.
If you planning early and filling on time your company can ensure smooth operations and stay compliant without the pressure of last-minute filings.
Author Bio
PLEASE CORRECT – the DUE date of LLP form 11 for annual return is May 2025