Tax Return Compliance Calendar for August 2025: Key GST, Income Tax, MCA Deadlines You Should Not Miss

As we have just stepped into a new month, i.e., August 2025, it is crucial for businesses and professionals to be aware and updated about the significant compliance deadlines under GST, Income Tax, MCA, SEBI, FEMA, PF and ESI, and Companies Act. This month of August is important as it falls under the ITR Filing season. Skipping any deadline may lead to massive penalties, investigation, imposition of late fee charges, tax notice, etc.

This month of August is important for verifying Form 26AS, AIS, and TIS, reporting correct income and deductions, and avoiding a last-minute rush and potential mismatch notices. The Income Tax Department has extended the deadline for filing ITR for non-audit cases (Individuals and HUFs) till September 15, 2025.

Income Tax Compliance Deadlines:

August 07, 2025

• It is the last date for submitting TDS/TCS for the last month, i.e., July 2025. This due date is applicable for all deductors and collectors.

August 15, 2025

• This is the deadline for two things: for giving out TDS Certificate (Form 16A) for the first quarter (April to June) of the financial year 2025-26, and for government offices to submit Form 24G if they deposited TDS or TCS without using a challan, i.e., through a book entry.

GST Compliance Deadlines:

August 10, 2025

• GSTR-7: Last date to file the monthly TDS return under GST for July.
• GSTR-8: Last date for e-commerce platforms to file the monthly TCS return under GST for July.

August 11, 2025

• GSTR-1: Registered individuals with aggregate turnover more than Rs 5 Crore during the previous year and registered persons who have opted for monthly filing with aggregate turnover less than Rs 5 Crore during the previous year.

August 13, 2025

• GSTR-6: Last date for Input Service Distributors (ISD) to file their return for the month of July 2025.
• GSTR-5: Return filing deadline for non-resident taxpayers for the month of July 2025.
• IFF (Invoice Furnishing Facility): Quarterly GST filers (QRMP scheme) can upload their B2B invoices for the month of July 2025.

August 20, 2025

• GSTR-3B: The deadline for filing the monthly GST summary return for July 2025 is if the taxpayer’s annual turnover is above Rs 5 crore or if he/she has chosen monthly filing.

MCA Compliance Deadlines:

August has fewer MCA compliance deadlines, but here are some key deadlines taxpayers must be aware of:

DIR-3 KYC (for Directors)

• As of March 31, 2025, all directors possessing a DIN are compulsory to complete their annual KYC (Know Your Customer). The deadline for performing this task is September 30, 2025. Although there is almost more than one month for this deadline, however, it is good to start preparing and coordinating in August.

DPT-3 Return (If Have Not Filed Yet)

• The due date was June 30, but if you haven’t filed it yet, do it immediately to avoid penalties.

PAS-6 Return

• Unlisted public companies need to file a half-yearly report reconciling their share capital. The deadline for April to September 2025 is October 29, 2025, but you can start working on it now.

AGM Preparation (For Companies with FY Ending March 2025)

• August is the month to finish audits and board meetings to approve accounts. Companies must hold their Annual General Meeting (AGM) within 6 months of the financial year-end, which means by September 30, 2025.