September 2026 Compliance Calendar
With multiple statutory and regulatory deadlines falling throughout the month, staying ahead of compliance requirements is essential for businesses.
We've consolidated the key tax due dates, regulatory filings, and statutory compliance requirements for September 2026, all in one place.
Plan ahead, stay organised, and avoid last-minute compliance rushes.
Prepared by
Due dates in September
Showing all 23 filings.
5 September
Saturday · 1 filing
SEZ
SEZ MPR (Monthly Performance Report) for Aug 2026
7 September
Monday · 2 filings
FEMA
ECB-2 return
TDS/TCS
TDS/TCS payment for Aug 2026
10 September
Thursday · 3 filings
GST
GSTR-7 (TDS); GSTR-8 (TCS) for Aug 2026
Professional Tax
PT on salaries for Aug 2026
Due date varies from state to state
SEZ/STPI
STPI SERF; SEZ SERF
Due date for STPI MPR/QPR may differ for each location
11 September
Friday · 1 filing
GST
Monthly GSTR-1 for Aug 2026
13 September
Sunday · 2 filings
GST
GSTR-5 (non-resident taxable persons); GSTR-6 (Input Service Distributor) for Aug 2026
GST
GSTR-1 IFF (optional, QRMP filers) for Aug 2026
14 September
Monday · 1 filing
TDS/TCS
Certificate under section 395(4) for tax deducted at source in July 2026
15 September
Tuesday · 2 filings
Income Tax
Advance tax, Q2 instalment (45% of estimated tax liability), Tax Year 2026-27
PF & ESI
Monthly PF and ESI payment for Aug 2026
20 September
Sunday · 1 filing
GST
Monthly GSTR-3B; GSTR-5A (OIDAR) for Aug 2026
25 September
Friday · 1 filing
GST
GST challan payment for Aug 2026 (QRMP scheme filers)
27 September
Sunday · 1 filing
MCA
Form AOC-4 (OPC) for FY 2025-26
30 September
Wednesday · 8 filings
MCA
Annual General Meeting to be held on or before 30 September 2026
Income Tax
Audit report in Forms 3CB-3CD and 3CA-3CD for non-corporates and corporates, FY 2025-26 (non-TP cases)
SEZ
SEZ APR (Annual Performance Report) for FY 2025-26
SEZ/STPI
STPI SOFTEX; SEZ SOFTEX for Aug 2026
TDS/TCS
Challan-cum-statement in Form No. 141 for tax deducted under section 393(1) [Table Sl. Nos. 2(i), 3(i), 6(ii) and 8(vii)] in Aug 2026
NBFC
Annual Form NBS1A, filed by Residuary Non-Banking Companies (RNBCs)
FEMA
Annual Activity Certificate for overseas investments, year ended 31 March 2026
FEMA
FLAIR return, based on audited financials
What these categories cover
- GST
- Returns and payments under the Goods and Services Tax, filed monthly or quarterly depending on the scheme a business has opted into.More on GST in the Founder's Guide
- TDS/TCS
- Deposits, statements and certificates for tax deducted or collected at source on payments such as salaries, rent and professional fees.More on TDS/TCS in the Founder's Guide
- Income Tax
- Advance tax instalments, tax audit reports and returns under the income tax law for companies, firms and individuals.More on Income Tax in the Founder's Guide
- MCA
- Annual filings and statutory events for companies and LLPs registered with the Ministry of Corporate Affairs.
- FEMA
- Reports to the Reserve Bank of India on foreign direct investment, overseas investment and external commercial borrowings.
- SEZ
- Performance reports that units in a Special Economic Zone file with the zone's Development Commissioner.
- SEZ/STPI
- Export declarations and returns for software and service exporters registered with an SEZ or a Software Technology Park of India.
- PF & ESI
- Employer contributions to the Employees' Provident Fund and the Employees' State Insurance scheme for people on the payroll.
- Professional Tax
- A state-level tax on salaries and professions that employers deduct and deposit, with rates and due dates set by each state.
- NBFC
- Returns that non-banking financial companies and similar entities file with the Reserve Bank of India.
Dates are as notified at the time of publishing and can be extended or changed by the authorities. Professional tax due dates vary by state. This calendar is general information, not advice: confirm the position that applies to your business with a qualified professional before you file.