Oct 8, 2025
Here’s your month-at-a-glance compliance guide for October 2025, compiled by Unpaper.
From income tax filings to GST returns, this list helps you stay on top of every key deadline — so you can plan your filings, avoid penalties, and keep operations smooth.
Income Tax Compliances
7 October 2025
Deposit of tax deducted or collected for September 2025
Deposit of quarterly TDS for July–September 2025 (where permitted under sections 192, 194A, 194D, 194H)
Upload of declarations in Form 27C received from buyers for September 2025
15 October 2025
Furnishing of Form 24G by government offices where TDS/TCS paid without challan (for September 2025)
Issue of TDS certificates under sections 194-IB, 194-IA, 194M, 194S for August 2025
Quarterly TCS statement for the quarter ending 30 September 2025
Upload of declarations in Form 15G / 15H for the quarter ending 30 September 2025
Form 3BB statement by stock exchanges for client code modifications (September 2025)
Quarterly statement by authorised dealers for foreign remittances (quarter ending 30 September 2025)
Quarterly statement by IFSC units for foreign remittances (quarter ending 30 September 2025)
Statement under Rule 114AAB by specified funds (quarter ending 30 September 2025)
30 October 2025
Furnishing of challan-cum-statement for TDS deducted under sections 194-IA, 194-IB, 194M, 194S for September 2025
Quarterly TCS certificate for the quarter ending 30 September 2025
31 October 2025
Quarterly TDS statement for the quarter ending September 2025
Return of income for AY 2025–26 (non-audit cases without international or specified domestic transactions)
Audit report under section 44AB (for assessees having international or specified domestic transactions)
Report in Form 3CEB for international or specified domestic transactions
Form 3CEJ report by eligible investment funds
Statements by scientific research associations and universities under Rules 5D, 5E, 5F
Submission of audit report to Department of Scientific & Industrial Research under section 35(2AB)
Intimation in Form 10BBB by pension funds (for quarter ending 30 September 2025)
Intimation in Form II by Sovereign Wealth Funds (for quarter ending 30 September 2025)
Statement under section 115BBF for royalty income option
Option to opt out of new tax regime under section 115BAC (if return due 31 October)
Option to opt for alternate tax regimes under sections 115BAD / 115BAE (if return due 31 October)
GST Compliances
10 October 2025
GSTR-7 (TDS return)
GSTR-8 (TCS return by e-commerce operators)
11 October 2025
GSTR-1 for September 2025 (monthly filers)
13 October 2025
GSTR-6 return by Input Service Distributors
IFF for September 2025 (for taxpayers under the QRMP scheme)
18 October 2025
Filing of GST CMP-08 for the July–September 2025 quarter (composition taxpayers)
20 October 2025
GSTR-3B for taxpayers with turnover above ₹5 crore
GSTR-5 and GSTR-5A for non-resident taxable persons
22 October 2025
GSTR-3B for taxpayers with turnover up to ₹5 crore – Group A States
24 October 2025
GSTR-3B for taxpayers with turnover up to ₹5 crore – Group B States
25 October 2025
Payment of tax for QRMP taxpayers through Form PMT-06
28 October 2025
GSTR-11 – statement of inward supplies by UIN holders
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