Tax Calendar 2026 — India (FY 2025-26 / AY 2026-27)

The financial year in India runs from 1 April to 31 March. GST, income tax, TDS, and company law each publish separate due dates — a business may have multiple filings every month even when net tax is low.

Missing a due date usually triggers interest under the relevant Act plus late fees on GST returns. ITR filed after the due date may attract a fee under Section 234F and loss of certain benefits.

Use this calendar for planning; always verify extensions on the GST portal and income tax portal before paying or filing.

GSTR-1 (outward supplies) is generally due by the 11th of the following month for monthly filers. GSTR-3B (summary and payment) is typically due by the 20th (22nd for some QRMP taxpayers).

Quarterly return filers under QRMP file GSTR-1 and pay tax in instalments per notified rules. GSTR-9 annual return for FY 2025-26 is commonly due by 31 December 2026 — check the latest notification.

Composition taxpayers file CMP-08 quarterly. We reconcile GSTR-2B before 3B and remind clients before each deadline.

Advance tax instalments for non-corporate taxpayers are typically 15 June (15%), 15 September (45%), 15 December (75%), and 15 March (100%) of estimated liability. Corporate due dates differ slightly.

ITR due dates vary: many individuals without audit requirement file by 31 July; audit cases and companies often have 31 October timelines. Belated and updated returns have separate windows and fees.

We prepare returns after AIS and Form 26AS reconciliation — see ITR filing online and tax calculator.

Employers deposit TDS monthly and file quarterly statements (24Q for salary, 26Q for other payments). Late deposit attracts interest under Section 201(1A); late filing attracts fees under Section 234E.

Form 16 must be issued to employees for salary TDS. Non-salary deductors issue Form 16A where applicable. We handle TDS return filing for Coimbatore businesses.

Tax audit reports (3CA/3CB and 3CD) tie to ITR due dates for applicable businesses. Companies have annual ROC filings and board compliance. LLPs and firms may have separate registrar deadlines.

Internal and concurrent audit for bank borrowers follow lender instructions — often quarterly. Future Tax coordinates internal audit with your GST and ITR team.

Retainer clients receive reminders before GSTR-1, GSTR-3B, TDS, and advance tax. We collect data on WhatsApp, file on the portal, and share acknowledgements. Notices are escalated with a documented reply plan.

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Central and state notifications sometimes extend due dates after natural events or portal issues. Subscribe to our blog for updates or ask our desk before planning large tax payments.