Tax & Compliance CalendarOctober 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

00

Closed

  1. 07Oct · Wed

    • TDS / TCS Payment

      TDS / TCS

      Challan for September deductions and collections

      Period: September 2026

      For: All deductors and collectors

      Get it filed
  2. 10Oct · Sat

    • GSTR-7

      GST

      Period: September 2026

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

      Get it filed

    • GSTR-8

      GST

      Period: September 2026

      For: E-commerce operators collecting TCS under GST

      Get it filed
  3. 11Oct · Sun

    • GSTR-1 (Monthly)

      GST

      Period: September 2026

      For: Regular taxpayers filing monthly

      Get it filed
  4. 13Oct · Tue

    • GSTR-1 (QRMP)

      GST

      Period: July to September 2026

      For: QRMP taxpayers filing quarterly

      Get it filed

    • GSTR-5

      GST

      Period: September 2026

      For: Non-Resident Taxable Persons (NRTP)

      Get it filed

    • GSTR-6

      GST

      Period: September 2026

      For: Input Service Distributors (ISD)

      Get it filed
  5. 15Oct · Thu

    • TCS Return (Q2)

      TDS / TCS

      Form 143 (earlier 27EQ)

      Period: July to September 2026

      For: All tax collectors

      Get it filed

    • Professional Tax (PTRC) Return

      Professional Tax

      Maharashtra monthly filers, due by the 15th

      Period: September 2026

      For: Employers filing PTRC returns monthly

      Get it filed

    • PF Payment (ECR)

      PF / ESI

      Period: September 2026

      For: All employers covered under PF

      Get it filed

    • ESIC Payment

      PF / ESI

      Period: September 2026

      For: All employers covered under ESI

      Get it filed
  6. 18Oct · Sun

    • CMP-08

      GST

      Quarterly statement and payment

      Period: July to September 2026

      For: Composition scheme taxpayers

      Get it filed
  7. 20Oct · Tue

    • GSTR-3B (Monthly)

      GST

      Period: September 2026

      For: Regular taxpayers filing monthly

      Get it filed

    • GSTR-5A

      GST

      Period: September 2026

      For: OIDAR service providers

      Get it filed
  8. 21Oct · Wed

    • Tax Audit Report (Extended)

      Income Tax

      Form 3CA-3CD / 3CB-3CD, extended from 30 Sep

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

      For: Businesses and professionals liable to tax audit

      Get it filed
  9. 22Oct · Thu

    • GSTR-3B (QRMP)

      GST

      Maharashtra and other Category X states

      Period: July to September 2026

      For: QRMP taxpayers

      Get it filed
  10. 24Oct · Sat

    • GSTR-3B (QRMP)

      GST

      Category Y states

      Period: July to September 2026

      For: QRMP taxpayers

      Get it filed
  11. 30Oct · Fri

    • LLP Form 8

      ROC / MCA

      Statement of Account & Solvency

      Period: FY 2025-26

      For: All LLPs

      Get it filed

    • AOC-4 (Financial Statements)

      ROC / MCA

      Within 30 days of the AGM

      Period: FY 2025-26

      For: Companies that held their AGM on or before 30 Sep

      Get it filed

    • TDS Challan-cum-Statement

      TDS / TCS

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

      Period: September 2026

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

      Get it filed
  12. 31Oct · Sat

    • TDS Return (Q2)

      TDS / TCS

      Forms 138 / 140 / 144 (earlier 24Q / 26Q / 27Q)

      Period: July to September 2026

      For: All deductors

      Get it filed

    • Transfer Pricing Report

      Income Tax

      Form 3CEB

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

      For: Taxpayers with international or specified domestic transactions

      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. 15

    Nov 2026

    TDS Certificates (Q2)

    Form 131 (earlier Form 16A) · July to September 2026

    All deductors, to be issued to deductees

    TDS / TCS

  2. 21

    Nov 2026

    ITR Filing, Audit Cases (Extended)

    Extended from 31 Oct · FY 2025-26 (AY 2026-27)

    Taxpayers whose accounts are audited

    Income Tax

  3. 25

    Nov 2026

    PMT-06 (QRMP)

    Monthly GST payment challan · October 2026

    QRMP taxpayers paying tax for the month

    GST

  4. 29

    Nov 2026

    MGT-7 / MGT-7A (Annual Return)

    Within 60 days of the AGM · FY 2025-26

    Companies that held their AGM on or before 30 Sep

    ROC / MCA

  5. 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

    The CBDT extended the tax audit report date to 21 October 2026 and the audit-case ITR date to 21 November 2026 for AY 2026-27 (press release dated 28 September 2026).

  2. 02

    QRMP GSTR-3B for July to September: 22 Oct for Maharashtra and other Category X states, 24 Oct for Category Y states.

  3. 03

    Maharashtra employers filing PTRC returns monthly must file the September return by 15 October, following the February 2026 change.

  4. 04

    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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