December 2025 Compliance Calendar for Startups, Businesses & Founders in India
Staying compliant is not optional it is a legal and financial necessity. December 2025 brings multiple critical due dates for GST, TDS, advance tax, PF, ESI, ROC filings, and quarterly tax returns. Missing these deadlines can result in heavy penalties, interest, and compliance red flags for businesses and individuals alike.
This December 2025 Compliance Calendar provides a consolidated, easy-to-track list of all major statutory due dates applicable under GST, Income Tax, Companies Act, PF/ESI, and Professional Tax laws in India.
Why a Compliance Calendar Matters in December 2025
- Ensures timely GST return filing, TDS payments, and ROC filings
- Helps avoid late fees, penal interest, and prosecution risks
- Supports year-end financial closure and audit preparedness
- Enables proper advance tax planning before the financial year end
- Improves investor confidence and due-diligence readiness
Key Statutory Compliance Due Dates – December 2025
Here is a tabular compliance calendar for December 2025-
| Due Date | Form / Compliance | Applicable To | Description / Purpose |
|---|---|---|---|
| 7th December 2025 (Sunday) | TDS / TCS Deposit | All deductors & collectors | Deposit of tax deducted or collected at source for November 2025 |
| 10th December 2025 (Wednesday) | GSTR-7 & GSTR-8 | Government deductors & e-commerce operators | GST TDS/TCS return for November 2025 |
| 11th December 2025 (Thursday) | GSTR-1 (Monthly) | Regular GST taxpayers | Outward supply return for November 2025 |
| 13th December 2025 (Saturday) | GSTR-1 IFF (Optional) | QRMP scheme taxpayers | Optional B2B invoice upload for November 2025 |
| GSTR-5 & GSTR-6 | Non-resident taxpayers & ISDs | Monthly GST returns for November 2025 | |
| 15th December 2025 (Monday) | Form 16A & Form 27D | All deductors & collectors | Issue of TDS/TCS certificates for Aug–Oct 2025 |
| Professional Tax Payment / Return | Employers (state-wise) | Monthly professional tax for November 2025 | |
| PF & ESI Payment / Return | All employers | Payroll compliance for November 2025 | |
| Third Installment of Advance Tax | Individuals & corporates liable to advance tax | Advance tax payment for FY 2025–26 | |
| 20th December 2025 (Saturday) | GSTR-3B (Monthly) | Regular GST taxpayers | Summary GST return for November 2025 |
| GSTR-5A | OIDAR service providers | GST return for online service providers for November 2025 | |
| 29th December 2025 (Monday) | Forms 26QB / 26QC / 26QD / 26QE | Property buyers, professionals, contractors, crypto traders | TDS challan-cum-statement under Sections 194-IA, 194-IB, 194M & 194S for November 2025 |
| 31st December 2025 (Wednesday) | Form 27EQ (Quarterly TCS Return) | TCS collectors | TCS return for Q3 FY 2025–26 |
| Forms 24Q / 26Q / 27Q (Quarterly TDS Returns) | All TDS deductors | TDS returns for Q3 FY 2025–26 | |
| Form 3BB | Stock brokers | Statement for November 2025 | |
| AOC-4 / AOC-4 XBRL / AOC-4 NBFC (Ind AS) | Companies & NBFCs | Filing of financial statements for FY 2024–25 (Extended Due Date) | |
| MGT-7 & MGT-7A | Companies & OPCs | Annual return for FY 2024–25 (Extended Due Date) |
7th December 2025 (Sunday)
- TDS/TCS Deposit – All deductors/collectors
Deposit tax deducted or collected at source for November 2025.
10th December 2025 (Wednesday)
- GSTR-7 & GSTR-8 – Government deductors & e-commerce operators
GST TDS/TCS return for November 2025.
11th December 2025 (Thursday)
- GSTR-1 (Monthly) – Regular GST taxpayers
Outward supply return for November 2025.
13th December 2025 (Saturday)
- GSTR-1 IFF (Optional) – QRMP scheme taxpayers
- GSTR-5 & GSTR-6 – Non-resident taxpayers & ISDs
Invoice uploads & monthly returns for November 2025.
15th December 2025 (Monday)
- Form 16A & Form 27D – All deductors/collectors
Issue of TDS/TCS certificates for Aug–Oct 2025. - Professional Tax Payment / Return – Employers
(Due date varies by state, e.g., Maharashtra). - PF & ESI Payment / Return – All employers
For wages of November 2025. - Third Installment of Advance Tax – FY 2025–26
Mandatory for individuals and corporates liable to advance tax.
20th December 2025 (Saturday)
- GSTR-3B (Monthly) – Regular GST taxpayers
- GSTR-5A – OIDAR service providers
Summary GST returns for November 2025.
29th December 2025 (Monday)
- Forms 26QB / 26QC / 26QD / 26QE
(TDS on property rent, professional payments, crypto, etc.)
TDS challan-cum-statements for November 2025 under Sections 194-IA, 194-IB, 194M & 194S.
31st December 2025 (Wednesday)
- Quarterly TCS Return – Form 27EQ (Q3 FY 2025–26)
- Quarterly TDS Returns – Forms 24Q / 26Q / 27Q (Q3 FY 2025–26)
- Form 3BB – Statement by Stock Brokers for November 2025
- AOC-4 / AOC-4 XBRL / AOC-4 NBFC (Ind AS)
Extended due date for FY 2024–25. - MGT-7 & MGT-7A (Annual ROC Return)
Extended due date for FY 2024–25.
Who Must Follow the December 2025 Compliance Calendar?
This calendar applies to:
- Private Limited Companies & OPCs
- Startups & MSMEs
- LLPs, Firms & Proprietorships
- GST-registered businesses
- TDS/TCS deductors
- Employers registered under PF, ESI & Professional Tax
- OIDAR service providers & non-resident taxpayers
- NBFCs and Ind-AS compliant entities
Summary of Key Forms & Their Purpose
| Form | Purpose | Frequency |
|---|---|---|
| GSTR-1, GSTR-3B, GSTR-5, GSTR-5A, GSTR-7, GSTR-8 | GST Returns | Monthly |
| Forms 24Q, 26Q, 27Q, 27EQ | Quarterly TDS/TCS Returns | Quarterly |
| Form 16A, 27D | TDS/TCS Certificates | Quarterly |
| PF & ESI | Employee Welfare Contributions | Monthly |
| AOC-4 / MGT-7 / MGT-7A | ROC Annual Filings | Annually |
| Advance Tax | Income-tax Liability | Quarterly |
Why Staying Compliant Matters
Non-compliance can lead to:
- Heavy interest and late fees under GST & Income-tax Act
- Director disqualification under the Companies Act
- Blocked refund claims & GST credit mismatches
- Adverse impact on funding, audits & investor due diligence
- Litigation and departmental scrutiny
For startups and scaling businesses, a clean compliance record directly impacts valuations and fund-raising success.
Compliance Tips from Treelife Experts
- Set up automated compliance alerts for all statutory deadlines.
- Reconcile GSTR-1 vs GSTR-3B before filing.
- Cross-check TDS entries with AIS & Form 26AS.
- Begin ROC annual filing well in advance of December deadlines.
- Maintain proper documentation for advance tax computation.
Conclusion
The December 2025 Compliance Calendar is one of the most critical months of the financial year, covering GST returns, quarterly TDS/TCS filings, advance tax, PF/ESI, and extended ROC filings. Proactive planning is essential to avoid year-end bottlenecks, regulatory scrutiny, and financial exposure.
For startups, SMEs, and growing enterprises, outsourcing compliance to experienced professionals ensures accuracy, peace of mind, and uninterrupted business growth.
Why Choose Treelife?
Treelife has been one of India’s most trusted legal and financial firms for over 10 years. We are proud to be trusted by over 1000 startups and investors for solving their problems and taking accountability.
Our team ensures:
- Zero missed deadlines
- Clean audit trails
- Investor-ready compliance
- Full statutory coverage across GST, Income Tax & MCA