The first MTD deadline has been and gone. Here is what it actually showed
Yesterday, 7 August 2026, was the first quarterly update deadline in the history of Making Tax Digital for Income Tax. More than 864,000 sole traders and landlords were in scope of it. After two years of warnings about fines and compliance risk, the thing itself turned out to be quieter than advertised — and the interesting part is where the difficulty actually was, because it was not where the marketing said.
The penalties everyone was warned about do not exist yet
This is the headline, and it is worth stating without hedging, because a great deal of software has been sold this summer on the opposite impression.
GOV.UK: there are no penalties for missing a quarterly update deadline for the 2026 to 2027 tax year. Not reduced. None.
The points-based regime is real, and it is coming — one point per missed deadline, £200 once you reach four points — but it starts in 2027/28. Anyone who missed yesterday owes nothing for having missed it.
It is worth being precise about what the soft landing does not cover, because that is where the honest version of this story diverges from the reassuring one:
| If this is late… | Cost in 2026/27 |
|---|---|
| A quarterly update | Nothing at all |
| Your 2026/27 tax return, due 31 Jan 2028 | Penalty points apply |
| Paying the tax, 16–30 days late | 3% of the tax owed at day 15 |
| Paying the tax, 31+ days late | 3% + a further 3%, then 10% a year interest |
So the first year is a genuine grace period on reporting, and no grace period whatsoever on paying. Those two things have been blurred together in a lot of what has been written, and blurring them is what makes people buy software to solve a problem they do not have yet, while ignoring the one they will have in January 2028.
The mechanic nobody expected: the updates fix themselves
The most common worry we saw in the run-up was some version of "what if I get the figures wrong?" — and the answer is genuinely surprising, because it is not really a problem at all.
A quarterly update is not a return for a three-month slice of the year. GOV.UK: each quarterly update covers from the start of the tax year to the end of the update period, not just the previous three months. They are cumulative.
Which means the update due on 7 November does not report July to October. It reports 6 April to 5 October — the whole year so far, restated. If yesterday's figures were wrong and your records are now right, November's update carries the corrected totals and the earlier mistake simply stops existing. GOV.UK says outright that you will not need to resend a quarterly update separately after an adjustment.
For the first three quarters of a year there is no amendment process, because none is needed. There is one exception: the fourth update is the last restatement of the year, so nothing follows it to carry a correction, and that one you may need to resend.
A lot of the people who were worried were never in scope
Mandation for this wave starts at qualifying income of more than £50,000, and qualifying income means gross self-employment plus gross property income — turnover, not profit — from a tax return two years back. Two consequences, both of which caught people:
- A salary does not count. Employment income, pensions, dividends and savings interest are all irrelevant to whether you are in MTD. Someone earning £80,000 on PAYE with a £10,000 side business is not in this year's wave.
- But turnover does, even with no profit. A landlord with £55,000 of rent and £48,000 of mortgage interest and costs has £7,000 of profit and was required to file yesterday.
That second case is the one worth dwelling on, because it is the least intuitive and it is common. Section 24 means residential landlords cannot deduct mortgage interest from profit at all — so a portfolio can be barely profitable and still comfortably over a threshold set on gross rent.
And the thresholds are all "more than". Exactly £50,000 is not over £50,000. On a boundary that decides whether you have a legal obligation, that word is the whole answer.
Where the difficulty actually was
Almost nobody misses a deadline because they forgot the date. The date was published years in advance and HMRC wrote to everyone. What went wrong, where it went wrong, was that on 6 August the figures were not in a state that could be summarised — an invoice never logged, a bank line never categorised, an expense sitting in the wrong month.
The reporting obligation is trivial. Under £90,000 of turnover for a source, you send consolidated totals — one income figure, one expense figure, no category breakdown at all. Since this wave starts at £50,000, a large share of everyone in scope needs precisely two numbers. No capital allowances, no private-use adjustments, no accruals; all of that happens once, at the final declaration.
Two numbers, four times a year. The work was never the submission. The work is having books good enough to produce two numbers on demand — and that is a new requirement for a lot of people who used to do it all once, in January.
That is the real change MTD makes, and it is a bigger one than the quarterly filing itself. Self Assessment tolerated a shoebox for eleven months of the year. Quarterly updates do not. Nothing is fined for it this year, but the habit either forms now or it does not form before the penalties start in 2027/28.
What to do in the next ninety days
The next deadline is 7 November 2026, covering the period to 5 October. It is not urgent yet, which makes it the only sensible moment to fix the thing that made yesterday hard.
- If you missed yesterday — send it anyway when you can. No penalty applies, but GOV.UK is explicit that quarterly updates must be in before you can submit your tax return, so it stays an open obligation.
- If your figures were wrong — correct your records now, not in November. The correction only reaches HMRC if it is in the records when the next update is generated.
- If you were never in scope — nothing to do, and check again after your next return. The threshold drops to £30,000 in April 2027 and £20,000 in April 2028, and each wave is decided by a return you have probably already filed.
- Everyone — the date that actually costs money is 31 January 2028, the first final declaration. That is the one to be ready for.
Sources. Checked against GOV.UK on 8 August 2026: penalties for MTD for Income Tax, send quarterly updates, when you need to use MTD and HMRC's news release on the first deadline for the 864,000 figure. This is a guide, not tax advice, and it is not compatible software. Check your own position with HMRC or your accountant.