What are the MTD quarterly update deadlines?

7 August, 7 November, 7 February and 7 May each year, for standard tax-year quarters.

When is the MTD Final Declaration due?

31 January following the end of the tax year. The same date as the traditional Self Assessment deadline.

MTD DEADLINES

Every MTD deadline, 2026 to 2029

Last checked: 8 September 2026 · Source: GOV.UK

2026/27 tax year (first mandated cohort)

Period	Deadline
Q1 (6 Apr – 5 Jul 2026)	7 August 2026
Q2 (6 Apr – 5 Oct 2026)	7 November 2026
Q3 (6 Apr 2026 – 5 Jan 2027)	7 February 2027
Q4 (6 Apr 2026 – 5 Apr 2027)	7 May 2027
Final Declaration	31 January 2028

2027/28 tax year

Period	Deadline
Q1	7 August 2027
Q2	7 November 2027
Q3	7 February 2028
Q4	7 May 2028
Final Declaration	31 January 2029

2028/29 tax year

Period	Deadline
Q1	7 August 2028
Q2	7 November 2028
Q3	7 February 2029
Q4	7 May 2029
Final Declaration	31 January 2030

This cohort (£20,000 threshold) is expected but not yet confirmed in law as of writing.

Calendar quarters instead

You can elect calendar quarters (1 Apr–30 Jun, 1 Jul–30 Sep, 1 Oct–31 Dec, 1 Jan–31 Mar) instead of standard tax-year quarters. The deadline dates stay the same, only the period boundaries shift.

Check this on GOV.UK →

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