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Firm compliance calendar

GST, TDS, ITR, ROC due dates across every client on one page.

September 2026

  • 20 Sun
    GSTR-3B · GSTR-3B (monthly) with tax payment
    Aug 2026 · Table 3.1 is locked to GSTR-1 from the July 2025 period: correct GSTR-1 through GSTR-1A before filing. · Falls on a Sunday: next working day applies.
    GST1d
  • 25 Fri
    PMT-06 · PMT-06 monthly tax payment (QRMP)
    Aug 2026
    GST6d
  • 30 Wed
    3CA / 3CB / 3CD · Tax audit report
    FY 2025-26
    Income tax11d

October 2026

  • 07 Wed
    Challan 281N · Deposit TDS / TCS
    Sep 2026
    TDS/TCS18d
  • 11 Sun
    GSTR-1 · GSTR-1 (monthly)
    Sep 2026 · Falls on a Sunday: next working day applies.
    GST22d
  • 13 Tue
    GSTR-1 · GSTR-1 (quarterly, QRMP)
    Q2 FY 2026-27
    GST24d
  • 20 Tue
    GSTR-3B · GSTR-3B (monthly) with tax payment
    Sep 2026 · Table 3.1 is locked to GSTR-1 from the July 2025 period: correct GSTR-1 through GSTR-1A before filing.
    GST
  • 22 Thu
    GSTR-3B · GSTR-3B (quarterly, QRMP)
    Q2 FY 2026-27 · 22nd for Category X states, 24th for Category Y states.
    GST
  • 31 Sat
    ITR / 3CEB · Income-tax return: audit cases and companies; transfer pricing report
    FY 2025-26
    Income tax
  • 31 Sat
    138 / 140 / 144 · TDS quarterly statement
    Q2 FY 2026-27 · Forms 138 (salary), 140 (residents) and 144 (non-residents) replace 24Q, 26Q and 27Q.
    TDS/TCS
  • 31 Sat
    Form 143 · TCS quarterly statement
    Q2 FY 2026-27 · Form 143 replaces 27EQ and is now due on the same dates as the TDS statements.
    TDS/TCS

November 2026

  • 07 Sat
    Challan 281N · Deposit TDS / TCS
    Oct 2026
    TDS/TCS
  • 11 Wed
    GSTR-1 · GSTR-1 (monthly)
    Oct 2026
    GST
  • 13 Fri
    IFF · IFF: optional B2B invoices (QRMP)
    Oct 2026
    GST
  • 15 Sun
    Form 131 · Issue Form 131 (TDS certificate)
    Q2 FY 2026-27 · Forms 130 and 131 replace Form 16 and Form 16A. · Falls on a Sunday: next working day applies.
    TDS/TCS
  • 20 Fri
    GSTR-3B · GSTR-3B (monthly) with tax payment
    Oct 2026 · Table 3.1 is locked to GSTR-1 from the July 2025 period: correct GSTR-1 through GSTR-1A before filing.
    GST
  • 25 Wed
    PMT-06 · PMT-06 monthly tax payment (QRMP)
    Oct 2026
    GST
  • 30 Mon
    ITR · Income-tax return: transfer pricing cases
    FY 2025-26
    Income tax

December 2026

  • 07 Mon
    Challan 281N · Deposit TDS / TCS
    Nov 2026
    TDS/TCS
  • 11 Fri
    GSTR-1 · GSTR-1 (monthly)
    Nov 2026
    GST
  • 13 Sun
    IFF · IFF: optional B2B invoices (QRMP)
    Nov 2026 · Falls on a Sunday: next working day applies.
    GST
  • 15 Tue
    Challan 280N · Advance tax instalment 3 (75% cumulative)
    FY 2026-27
    Income tax
  • 20 Sun
    GSTR-3B · GSTR-3B (monthly) with tax payment
    Nov 2026 · Table 3.1 is locked to GSTR-1 from the July 2025 period: correct GSTR-1 through GSTR-1A before filing. · Falls on a Sunday: next working day applies.
    GST
  • 25 Fri
    PMT-06 · PMT-06 monthly tax payment (QRMP)
    Nov 2026
    GST
  • 31 Thu
    GSTR-9 / 9C · GST annual return and reconciliation statement
    FY 2025-26 · GSTR-9 is mandatory above Rs 2 crore turnover and GSTR-9C above Rs 5 crore.
    GST
  • 31 Thu
    ITR · Belated or revised income-tax return
    FY 2025-26 · Finance Act 2026 allows a revised return up to 12 months from the end of the year, with a fee if filed after nine months. Belated returns remain due by this date.
    Income tax

January 2027

  • 07 Thu
    Challan 281N · Deposit TDS / TCS
    Dec 2026
    TDS/TCS
  • 11 Mon
    GSTR-1 · GSTR-1 (monthly)
    Dec 2026
    GST
  • 13 Wed
    GSTR-1 · GSTR-1 (quarterly, QRMP)
    Q3 FY 2026-27
    GST
  • 20 Wed
    GSTR-3B · GSTR-3B (monthly) with tax payment
    Dec 2026 · Table 3.1 is locked to GSTR-1 from the July 2025 period: correct GSTR-1 through GSTR-1A before filing.
    GST
  • 22 Fri
    GSTR-3B · GSTR-3B (quarterly, QRMP)
    Q3 FY 2026-27 · 22nd for Category X states, 24th for Category Y states.
    GST
  • 31 Sun
    138 / 140 / 144 · TDS quarterly statement
    Q3 FY 2026-27 · Forms 138 (salary), 140 (residents) and 144 (non-residents) replace 24Q, 26Q and 27Q. · Falls on a Sunday: next working day applies.
    TDS/TCS
  • 31 Sun
    Form 143 · TCS quarterly statement
    Q3 FY 2026-27 · Form 143 replaces 27EQ and is now due on the same dates as the TDS statements. · Falls on a Sunday: next working day applies.
    TDS/TCS

February 2027

  • 07 Sun
    Challan 281N · Deposit TDS / TCS
    Jan 2027 · Falls on a Sunday: next working day applies.
    TDS/TCS
  • 11 Thu
    GSTR-1 · GSTR-1 (monthly)
    Jan 2027
    GST
  • 13 Sat
    IFF · IFF: optional B2B invoices (QRMP)
    Jan 2027
    GST
  • 15 Mon
    Form 131 · Issue Form 131 (TDS certificate)
    Q3 FY 2026-27 · Forms 130 and 131 replace Form 16 and Form 16A.
    TDS/TCS
  • 20 Sat
    GSTR-3B · GSTR-3B (monthly) with tax payment
    Jan 2027 · Table 3.1 is locked to GSTR-1 from the July 2025 period: correct GSTR-1 through GSTR-1A before filing.
    GST
  • 25 Thu
    PMT-06 · PMT-06 monthly tax payment (QRMP)
    Jan 2027
    GST

March 2027

  • 07 Sun
    Challan 281N · Deposit TDS / TCS
    Feb 2027 · Falls on a Sunday: next working day applies.
    TDS/TCS
  • 11 Thu
    GSTR-1 · GSTR-1 (monthly)
    Feb 2027
    GST
  • 13 Sat
    IFF · IFF: optional B2B invoices (QRMP)
    Feb 2027
    GST
  • 15 Mon
    Challan 280N · Advance tax instalment 4 (100% cumulative)
    FY 2026-27
    Income tax
  • 20 Sat
    GSTR-3B · GSTR-3B (monthly) with tax payment
    Feb 2027 · Table 3.1 is locked to GSTR-1 from the July 2025 period: correct GSTR-1 through GSTR-1A before filing.
    GST
  • 25 Thu
    PMT-06 · PMT-06 monthly tax payment (QRMP)
    Feb 2027
    GST

These are the default statutory dates. Extensions notified by CBDT, CBIC or MCA are not reflected, so confirm before relying on a date. ROC dates assume the AGM is held on 30 September.

IN SHORT

This free compliance calendar lists the statutory due dates for GST, TDS and TCS, income tax, PF and ESI, and ROC filings for an Indian financial year, filtered to the kinds of clients a CA firm handles. It exports to Excel and to a calendar file with reminders. Dates are the default statutory dates and do not include government extensions.

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STEP BY STEP

How it works

  1. Pick the financial year and the kinds of clients you handle.
  2. See every due date month by month, with days remaining.
  3. Export to Excel, or add them all to Google, Outlook or Apple Calendar with a three-day reminder.

GOOD TO KNOW

Common questions

Do the dates include government extensions?
No. These are the default statutory dates. When CBDT, CBIC or MCA extend a date, confirm from the notification.
What if a due date falls on a Sunday?
The page marks it. By law the next working day applies.
Which filings are covered?
GSTR-1, GSTR-3B, IFF, PMT-06, CMP-08, GSTR-9, TDS and TCS deposits and quarterly statements, Form 16 and 16A, advance tax, income-tax returns, tax audit, PF and ESI, and the main ROC and LLP forms.