SME tax and compliance calendar 2026-27

Most penalties come from missed dates, not missed tax. This calendar lists the recurring income-tax and GST deadlines for tax year 2026-27 in one place: advance-tax instalments, monthly GST returns and TDS deposits, and the annual filing dates. Copy it into your own calendar with reminders a few days ahead of each date. Presumptive taxpayers have it simplest, a single advance-tax payment on 15 March.

Last reviewed: 29 May 2026

Guidance, not advice. We explain the rules, we don't assess your situation. Always seek financial or tax advice from your accountant, or contact Income Tax Department. Read our editorial scope →

What it contains

A month-by-month list of recurring GST and TDS dates plus the income-tax advance-tax and filing deadlines, with the presumptive single-instalment date called out.

How to use it

Add to your calendar with reminders

Copy the dates into your phone or work calendar and set a reminder 3 to 5 days before each, the buffer is what prevents late fees and interest.

Mark only what applies to you

Delete the lines that do not apply (for example the quarterly TDS-return dates if you do not deduct, or the monthly GST dates if you are not registered).

Presumptive taxpayers: focus on 15 March

If you are on 44AD or 44ADA, your advance tax is a single payment by 15 March, so that one date plus your 31 July return are the main events.

Copy the letter text

Prefer not to download? Copy the text below and paste into your own document.

TAX & COMPLIANCE CALENDAR - TAX YEAR 2026-27 (1 Apr 2026 to 31 Mar 2027)

  MONTHLY (every month):
  - 7th: deposit TDS/TCS deducted in the previous month
  - 11th: file GSTR-1 (outward supplies) [monthly filers]
  - 20th: file GSTR-3B + pay GST [monthly filers]
  - (QRMP filers: GSTR-1 and 3B quarterly; pay GST monthly by challan)

  ADVANCE TAX (income tax):
  - 15 June 2026: 1st instalment (15% cumulative) [non-presumptive]
  - 15 September 2026: 2nd instalment (45% cumulative)
  - 15 December 2026: 3rd instalment (75% cumulative)
  - 15 March 2027: 4th instalment (100%) -- AND the single 100% payment for presumptive (44AD/44ADA) taxpayers

  QUARTERLY:
  - End of month after each quarter: file TDS returns (24Q/26Q) if you deduct
  - CMP-08 (composition dealers): by the quarter-end due date

  ANNUAL (filed in 2027, for tax year 2026-27):
  - 31 July 2027: income-tax return (non-audit cases)
  - 30 September 2027: tax-audit report (audit cases)
  - 31 October 2027: income-tax return (audit cases)
  - 30 November 2027: return (transfer-pricing cases)
  - 31 December 2027: belated/revised return; GST annual return (GSTR-9/9C)

  NOTE: dates falling on a holiday usually move to the next working day; confirm on the portal.