What You'll Need to Do Under MTD
Once you're in scope, MTD changes how you manage your Self Assessment information throughout the year. It does not replace the annual Self Assessment tax return.
You'll need to:
- Digital record-keeping, using MTD-compatible software to keep digital records of your self-employment and property income and expenses.
- Quarterly updates, sending summaries of your digital records to HMRC throughout the tax year.
- An annual tax return, where you finalise your figures, include other relevant income and reliefs, and submit your Self Assessment tax return through your compatible software.
For the 2026/27 tax year, the standard quarterly update deadlines are 7 August, 7 November, 7 February and 7 May. HMRC has confirmed that there are no penalty points for late quarterly updates during 2026/27, although you still need to submit them before you can file your tax return.
If you're unsure how the quarterly side works in practice, our guide to MTD quarterly update deadlines walks through every date, what to include, and what happens if you miss one.
And if you're already using the app, here's exactly how to file your MTD quarterly update in the Pie Tax app
Self-employed professional reviewing quarterly income and expenses for Making Tax Digital compliance
The New Penalty System
Alongside MTD, HMRC has introduced a new points-based penalty regime for late submissions.
For the 2026/27 tax year, there are no penalty points for late quarterly updates. However, penalties can still apply to late tax returns and late payment of tax.
From tax years after 2026/27, missing a quarterly update or tax return deadline can result in a penalty point. Once you reach 4 points, a £200 penalty applies, with further £200 penalties for subsequent missed deadlines.
Penalty points are subject to HMRC's rules on when they can be removed, including requirements around submitting outstanding returns and updates and maintaining compliance.
It's therefore worth getting into the habit of keeping your digital records up to date and checking your reporting deadlines. If you want to understand what's actually at stake financially, the true cost of late tax filing breaks down the fines and interest involved.