| Due Date |
Due Date Details |
| 30-09-2026 | Due date for filing of audit report under section 44AB (Income-tax Act, 1961) for the assessment year 2026-27 in the case of a corporate-assessee or non-corporate assessee (who is required to submit his/its return of income on October 31, 2026) |
| 30-09-2026 | Furnishing of challan-cum-statement in Form No. 141 (Income-tax Rules, 2026) in respect of deduction of tax under section 393(1) [Table Sl. No. 2(i), 3(i), 6(ii) & 8(vi)] of the Income-tax Act, 2025 for the month of August 2026. |
| 30-09-2026 | Furnishing of statement in Form No. 3AF (Income-tax Rules, 1962) containing the particulars of expenditures specified under Section 35D(2)(a) (Income-tax Act, 1961) (if the assessee is required to submit the return of income on or before October 31, 2026) |
| 30-09-2026 | The due date of conducting AGM is on or before the 30th September, 26 following the end of financial year. |
| 29-09-2026 | World Heart Day |
| 27-09-2026 | World Tourism Day |
| 27-09-2026 | Form AOC 4 for OPC needs to be filed with relevant ROC within 180 days of the closure of a particular financial year. |
| 25-09-2026 | Anant Chaturdashi |
| 25-09-2026 | Ganesh Visarjan |
| 25-09-2026 | PMT-06 is a challan used for making payment of tax, interest, late fee and penalty under the GST law by taxpayers who have opted for the quarterly filing of GSTR-3B under the QRMP scheme |
| 20-09-2026 | Summary of outward taxable supplies and tax payable by a person supplying OIDAR services |
| 20-09-2026 | Summary of outward supplies, ITC claimed, and net tax payable for taxpayers with turnover more than Rs.5 crore in the last FY or have not chosen the QRMP scheme for the quarter of Jul - Sep, 26 |
| 17-09-2026 | Vishwakarma Puja |
| 15-09-2026 | Engineers Day |
| 15-09-2026 | Hindi Diwas |
| 15-09-2026 | One-Time Opportunity to Regularise Pending ROC Compliances |
| 15-09-2026 | Statement in Form 1 (Income-tax Rules, 2026) by the stock exchange for the month of August 2026, in respect of transactions in which client codes have been modified after registering in the system. |
| 15-09-2026 | Due date for furnishing Form No. 137 (Income-tax Rules, 2026) by an office of the Government where TDS/TCS for the month of August, 2026 has been paid without the production of a challan |
| 15-09-2026 | Second instalment of advance tax for the Tax Year 2026-27 |
| 15-09-2026 | PF deducted from the Employees salary in the month of Aug, 26, needs to be paid on or before 15th of Sep, 2026
The payment of ESIC is made by every employer to the ESIC department on a monthly basis. The due date for ESIC is 15th Sep, 2026 |
| 15-09-2026 | Samvatsari |
| 15-09-2026 | Micchami Dukkadam |
| 14-09-2026 | Issue of certificate in Form No. 132 (Income-tax Rules, 2026) under section 395(4) of the Income-tax Act 2025 for tax deducted at source under section 393(1) [Table Sl. No. 2(i), 3(i), 6(ii) & 8(vi)] of the Income-tax Act, 2025 in the month of July, 2026 |
| 14-09-2026 | Ganesh Chaturthi |
| 13-09-2026 | Summary of outward taxable supplies and tax payable by a
non-resident taxable person |
| 13-09-2026 | GSTR 6 is a monthly return for Input Service Distributors (ISD) to provide the details of their inward supplies & distributed Input Tax Credit (ITC). |
| 13-09-2026 | Invoice Furnishing is an optional facility which enables the small registered person, furnishing the quarterly Form GSTR-1, to file their invoice details on monthly basis. |
| 12-09-2026 | Mahavir Janma Vanchan |
| 11-09-2026 | Summary of outward supplies where turnover exceeds Rs.5 crore or have not chosen the QRMP scheme for the quarter of Jul - Sep, 26 |
| 10-09-2026 | Summary of Tax Deducted at Source (TDS) and deposited under GST
laws for the month of August, 2026 |
| 10-09-2026 | Summary of Tax Collected at Source (TCS) and deposited by e-commerce operators under GST laws for the month of August, 2026 |
| 08-09-2026 | Feast of Nativity |
| 08-09-2026 | Paryushan Parva |
| 07-09-2026 | Due date for deposit of Tax deducted/collected for the month of August, 2026. However, all sum deducted/collected by an office of the government shall be paid to the credit of the Central Government on the same day where tax is paid without production of an Income-tax Challan |
| 07-09-2026 | Uploading of declarations received in Form No. 127 (Income-tax Rules, 2026) from the buyer in the month of August, 2026 |
| 05-09-2026 | Dahi Handi |
| 05-09-2026 | Teachers Day |
| 04-09-2026 | Janmashtami |