A busy September 2026 presents a complex array of statutory obligations for one-person companies, highlighting the need for careful planning and adherence to avoid penalties.
September 2026 brings a crowded run of statutory deadlines for one-person companies, with obligations spanning tax, GST, employee contributions and corporate filings. According to Ebizfiling’s compliance calendar, the month includes payments and returns linked to TDS and TCS, the second instalment of advance tax, GST filings under both monthly and quarterly schemes, EPF and ESI remittances where applicable, the filing of financial statements with the Registrar of Companies, property-related withholding tax reporting and the tax audit report.
The earliest deadlines fall in the first half of the month. The calendar places TDS and TCS deposit obligations on September 7, GST TDS return filing on September 10, GSTR-1 on September 11 and the optional Invoice Furnishing Facility for QRMP taxpayers on September 13. Advance tax, EPF contribution reporting and ESI payment all cluster on September 15, while monthly GSTR-3B is due on September 20 and QRMP tax payment through PMT-06 on September 25. Official GST guidance and compliance resources from the GST portal, Income Tax Department, EPFO and ESIC align with the forms and processes referenced in the schedule.
Later in the month, eligible OPCs must file financial statements in AOC-4 by September 27, followed by Form 141 for specified immovable property transactions on September 30. The same date also marks the deadline for the tax audit report for the relevant financial year and assessment year. Ebizfiling notes that these obligations do not apply automatically to every OPC: each filing depends on the company’s registrations, turnover, employee count, tax exposure and the nature of its transactions.
The compliance burden can be significant for small companies because missed deadlines can trigger interest, late fees, penalties and notices. For that reason, the company’s guidance stresses that OPC owners should first check which rules apply before filing anything in September. That is especially important for GST, where the return type depends on whether the business files monthly or under QRMP, and for labour law filings, which depend on whether the establishment is covered by EPF or ESI.
Disclaimer: This article is intended to inform and educate, not to recommend or endorse any financial product, investment or strategy. Please consider your own financial circumstances and seek professional advice where appropriate before making financial decisions.
