I’ve been going through it tonight for a friend
Anyone who has already been doing MTD are as part of voluntary trials
The first mandatory MTD begins this year (tax year 2026/27) and anyone required will be notified by HMRC by letter, but the thresholds and timing have been published :
If your 2024/25 gross income was >= £50,000 then you are required to begin MTD for 2026/27 with the fiat quarter of 6 April to 5 July being due to be submitted on 7 August
(HMRC are not going to be giving late penalties for quarterly submissions for those on year one - but all
of the quarters will have to be submitted before the year end final submission which would have the usual late penalties)
Next will be a gross income of >= £30,000 for the year 2025/26 and they will be required to compete MTD for 2027/28, followed by >= £20,000 for the year 2028/29
**
Obviously I’m not giving tax advice ….. but we read it as:
2024/25 The deadline date of 31/1/26 has just happened
2025/26 This FY ends in a couple of months, and the existing tax processes remain with a submission deadline of 31/1/27
2026/27 The FY will begin in a couple of months, with quarterly MTD reporting due from August, but the final submission deadline won’t be until 31/1/28
This does mean that people could be doing initial quarterly 26/27 reporting before having done their 25/26 submission
It might result in some being more “speedy” to get things out of the way in a more “sensible”
order