SelfSubmit is designed to help you stay compliant with HMRC Making Tax Digital requirements. You remain responsible for ensuring the information you submit is accurate.

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MTD Deadlines

MTD adds quarterly reporting dates throughout the tax year on top of familiar Self Assessment payment deadlines. Missing a date can trigger penalties.

  • Quarterly update deadlines follow your accounting period
  • 31 January remains key for balancing payments and declarations
  • 31 July payment on account applies to many taxpayers

What it is

Under MTD for Income Tax you must meet quarterly update deadlines tied to your accounting period, as well as existing Self Assessment deadlines for paying tax and submitting your final declaration.

Your software or HMRC account shows the exact due date for each quarterly period. Calendar reminders should cover both submissions and payments. Agents can file on your behalf but you remain responsible for timeliness.

Who it applies to

Anyone required to follow MTD for Income Tax must meet the quarterly timetable HMRC sets for their business. VAT-registered businesses have separate VAT Return deadlines.

What you need to do

  • Note your quarterly period end dates in your software or calendar.
  • Submit each quarterly update by the deadline HMRC gives you.
  • Complete your final declaration and pay any tax due by 31 January after the tax year.

Key points

  • Missing a quarterly update can result in penalties.
  • Payment on account dates (31 January and 31 July) still apply for many taxpayers.

Common mistakes to avoid

  • Only diarising January and forgetting quarterly updates
  • Believing an extension for one obligation covers all HMRC deadlines
  • Submitting late because records were not kept during the quarter

How SelfSubmit helps

Use the SelfSubmit dashboard deadline view and optional email reminders so monthly record-keeping stays on track before each HMRC quarter ends.

Further reading