Missing a compliance deadline costs more than the filing itself. Late fees, interest, and penalties add up quickly. Here is a month-by-month overview of the major deadlines for FY 2026-27. Note: always verify exact dates on the official Income Tax and GST portals as the government occasionally extends deadlines.
April 2026
Financial year begins. Advance tax first instalment due by June 15. File TDS return for Q4 of the previous year (Form 24Q and 26Q) by May 31. Issue Form 16 to employees by June 15. File GSTR-1 for March by April 11 (if monthly) and GSTR-3B by April 20.
May to June 2026
File annual returns for the previous year: MGT-7 and AOC-4 for companies (due within 60 days of AGM). Advance tax first instalment (15% of estimated liability) due June 15. GSTR-1 and GSTR-3B monthly filers continue monthly cycle. Quarterly filers file GSTR-1 for April to June by July 31.
July 2026
Income Tax Return filing season opens. Salaried individuals and non-audit cases: due July 31. Advance tax second instalment (45% cumulative) due September 15. TDS return for Q1 (April to June) due July 31. GST annual return (GSTR-9) for previous year typically due December 31.
August to September 2026
Advance tax second instalment due September 15. Form 16A for non-salary TDS issued by August 15. GSTR-3B and GSTR-1 continue monthly. TDS certificates issued. PF and ESI monthly contributions due by 15th and 21st of each month respectively throughout the year.
October 2026
Tax audit cases (businesses with turnover above Rs. 1 crore and professionals above Rs. 50 lakh) have ITR due October 31. Company AGM should be held by September 30. ROC annual filings (MGT-7 and AOC-4) due within 60 days of AGM. GSTR-9 for previous FY due December 31. Advance tax third instalment (75% cumulative) due December 15.
November to December 2026
TDS return for Q2 (July to September) due October 31. Advance tax third instalment due December 15. GSTR-9 and GSTR-9C for FY 2025-26 due December 31. This is typically the busiest compliance month of the year.
January to March 2027
Advance tax final instalment (100%) due March 15. If you have not yet paid enough advance tax, pay the balance by March 15 to avoid interest under Section 234C. TDS return for Q3 due January 31. Review your investment proofs for employer TDS calculation. Prepare for the year-end accounting close.
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