Tax & Compliance CalendarSeptember 2026

Every due date that matters this month, in one place: who it applies to, what period it covers, and a one-tap way to get it filed before late fees kick in.

  • GST
  • Income Tax
  • TDS / TCS
  • PF / ESI
  • Professional Tax
  • ROC / MCA

00

Open

00

Due in 7 days

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Closed

  1. 07Sep · Mon

    • TDS Payment

      TDS / TCS

      Return forms 138 / 140 / 144 (earlier 24Q / 26Q / 27Q)

      Period: August 2026

      For: All deductors

      Get it filed

    • TCS Payment

      TDS / TCS

      Return form 143 (earlier 27EQ)

      Period: August 2026

      For: All collectors

      Get it filed
  2. 10Sep · Thu

    • GSTR-7

      GST

      Period: August 2026

      For: GST TDS deductors (Govt. and specified persons)

      Get it filed

    • GSTR-8

      GST

      Period: August 2026

      For: E-commerce operators collecting TCS under GST

      Get it filed
  3. 11Sep · Fri

    • GSTR-1 (Monthly)

      GST

      Period: August 2026

      For: Regular taxpayers filing monthly

      Get it filed
  4. 13Sep · Sun

    • IFF (QRMP)

      GST

      Invoice Furnishing Facility

      Period: August 2026

      For: QRMP taxpayers uploading B2B invoices

      Get it filed

    • GSTR-5

      GST

      Period: August 2026

      For: Non-Resident Taxable Persons (NRTP)

      Get it filed

    • GSTR-6

      GST

      Period: August 2026

      For: Input Service Distributors (ISD)

      Get it filed
  5. 15Sep · Tue

    • 2nd Advance Tax Instalment

      Income Tax

      45% of estimated tax, cumulative

      Period: Tax Year 2026-27

      For: Taxpayers with estimated tax of ₹10,000 or more

      Get it filed

    • Professional Tax (PTRC) Return

      Professional Tax

      Maharashtra monthly filers, now due by the 15th

      Period: August 2026

      For: Employers filing PTRC returns monthly

      Get it filed

    • PF Payment (ECR)

      PF / ESI

      Period: August 2026

      For: All employers covered under PF

      Get it filed

    • ESI Payment

      PF / ESI

      Period: August 2026

      For: All employers covered under ESI

      Get it filed
  6. 20Sep · Sun

    • GSTR-3B (Monthly)

      GST

      Period: August 2026

      For: Regular taxpayers filing monthly

      Get it filed

    • GSTR-5A

      GST

      Period: August 2026

      For: OIDAR service providers

      Get it filed
  7. 25Sep · Fri

    • PMT-06 (QRMP)

      GST

      Monthly GST payment challan

      Period: August 2026

      For: QRMP taxpayers paying tax for the month

      Get it filed
  8. 30Sep · Wed

    • Tax Audit Report

      Income Tax

      Form 3CA-3CD / 3CB-3CD

      Period: FY 2025-26 (AY 2026-27)

      For: Businesses and professionals liable to tax audit

      Get it filed

    • TDS Challan-cum-Statement

      TDS / TCS

      Form 141 (earlier 26QB / 26QC / 26QD / 26QE)

      Period: August 2026

      For: Individuals deducting TDS on property purchase, rent or contract payments

      Get it filed

    • Annual General Meeting (AGM)

      ROC / MCA

      Starts the AOC-4, MGT-7 and ADT-1 clock

      Period: FY 2025-26

      For: Companies with a 31 March year end

      Get it filed
Plan ahead

Coming up next

Big dates in the next few weeks. Audit-case returns and quarterly GST take time to prepare, so start early.

  1. 22

    Oct 2026

    GSTR-3B (QRMP)

    Maharashtra and other Group A states · July to September 2026

    QRMP taxpayers

    GST

  2. 24

    Oct 2026

    GSTR-3B (QRMP)

    Group B states · July to September 2026

    QRMP taxpayers

    GST

  3. 30

    Oct 2026

    LLP Form 8

    Statement of Account & Solvency · FY 2025-26

    All LLPs

    ROC / MCA

  4. 30

    Oct 2026

    AOC-4 (Financial Statements)

    Within 30 days of the AGM · FY 2025-26

    Companies that held their AGM on 30 Sep

    ROC / MCA

  5. 31

    Oct 2026

    ITR Filing (Audit Cases)

    FY 2025-26 (AY 2026-27)

    Taxpayers whose accounts are audited

    Income Tax

  6. 31

    Oct 2026

    Transfer Pricing Report

    Form 3CEB · FY 2025-26 (AY 2026-27)

    Taxpayers with international or specified transactions

    Income Tax

  7. 30

    Nov 2026

    ITR Filing (Transfer Pricing Cases)

    FY 2025-26 (AY 2026-27)

    Taxpayers required to file Form 3CEB

    Income Tax

Worth knowing this month

  1. 01

    GSTR-2B for August is generated by the GST portal on 14 Sep. It is not a filing, but check your input tax credit in it before filing GSTR-3B.

  2. 02

    QRMP taxpayers file GSTR-3B for July to September in October: 22 Oct for Maharashtra and other Group A states, 24 Oct for Group B states.

  3. 03

    13 Sep and 20 Sep fall on Sundays. File by the printed date rather than counting on a move to Monday.

  4. 04

    Professional bodies have asked for the 30 Sep tax audit date to be extended. Until the CBDT notifies it, treat 30 Sep as final. We update this page when dates change.

  5. 05

    Not every deadline applies to every business. Ask us to check which ones apply to you.

This calendar is general information, not advice for your specific case. Due dates follow notifications issued by the CBDT, GSTN, EPFO, ESIC, MCA and state Professional Tax departments, and can change.

Not sure which of these apply to you?

Send us your GSTIN or PAN. We’ll tell you exactly what’s due, file it on time, and remind you before next month’s dates come around.

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