Making Tax Digital Deadlines: Your Next MTD Quarterly Update

MTD quarterly update deadlines

Once you're required to use Making Tax Digital for Income Tax, you send a quarterly update to HMRC roughly a month after each quarter ends: the 6 April–5 July period is due 7 August, 6 July–5 October is due 7 November, 6 October–5 January is due 7 February, and 6 January–5 April is due 7 May. On top of the four quarterly updates, a final declaration for the whole tax year is due by 31 January the following year — the same deadline self-assessment taxpayers already know.

Standard periods vs. calendar quarters

By default, update periods run from the 6th of one month to the 5th of the month three months later, matching the UK tax year's own 6 April start. If you'd rather track plain calendar quarters (1 January–31 March, 1 April–30 June, and so on), you can toggle that above — the due dates themselves don't change, only which exact days count as the start and end of "this period".

How to use this calendar

The top card always shows whichever deadline — a quarterly update or the annual final declaration — is soonest from today, with a day countdown. The table below lists every deadline for the current and next tax year, with ones already past shown greyed out. Use "Add to calendar" to download an .ics file with every upcoming deadline and a reminder a week before each one, so they land in whatever calendar app you already use.

Common mistakes

The most common mistake is tracking only the quarterly updates and forgetting the final declaration — it's a separate submission with its own 31 January deadline, not something the last quarterly update covers automatically. A second is assuming a missed quarterly deadline is as serious as a missed final declaration; the two carry different penalty rules, so check HMRC's current guidance on late submission penalties rather than assuming.