Deadlines and reminders
Quarterly updates and the annual tax return - all the key dates.
Making Tax Digital has four quarterly-update deadlines each tax year. You must also complete and submit your annual Self Assessment tax return by 31 January following the end of the relevant tax year.
First mandatory quarterly update: 7 August 2026 for people required to join from 6 April 2026. HMRC states that quarterly updates are cumulative summaries and explains alternative calendar update periods in its guidance.
First annual MTD tax return: the return for the 2026 - 27 tax year must be submitted by 31 January 2028. You can submit it earlier once the tax year has ended, your records are finalised and the required information and adjustments have been completed.
Calendar reminders
Use the manual calendar file below or add the dates shown on this page to your calendar. Check this page and HMRC guidance for later revisions.
Live feed address to be confirmed
Simple manual calendar install
Download the complete non-updating set of quarterly-update and annual-return reminders for a quick manual import.
What each reminder is for
- Three weeks before: check that transactions are complete and request missing records.
- Two weeks before: reconcile records and investigate obvious gaps.
- Seven days before: review categories and confirm each business or property source.
- Three days before: resolve software or authorisation problems.
- One day before: submit if ready rather than relying on the final day.
For the 31 January annual-return deadline, make sure all taxable income and gains are included, check HMRC-supplied information, complete any year-end adjustments, review the tax calculation and submit the return through compatible MTD software.