The first Making Tax Digital for Income Tax quarterly deadline closed on 7 August 2026, with more than 864,000 sole traders and landlords required to file a digital quarterly update covering income from 6 April to 5 July. If you’re one of the roughly 40,000 UK sole traders or landlords with combined income over £50,000 from self-employment or property who was supposed to file and didn’t, the story doesn’t end there. HMRC has confirmed that from September 2026, it will begin actively signing up customers who should already be on MTD but aren’t, with new guidance due out later this month.
For anyone who assumed missing the first quarter quietly would buy more time, that assumption is about to be tested. This is the first MTD cycle where HMRC is moving from “here’s a new system, get used to it” to “we know who hasn’t complied, and we’re acting on it.”
Why the first deadline catching people out isn’t surprising
MTD for Income Tax replaced the old routine of one annual Self Assessment return with quarterly digital updates on top of it — a genuinely different rhythm for anyone used to doing their books once a year in January. Sole traders and landlords who’ve run their bookkeeping the same way for a decade were always likely to miss the first cycle, especially with the qualifying threshold (£50,000 combined gross income) catching some people who didn’t realise they were in scope until close to the deadline.
The annual Self Assessment return itself hasn’t gone away — it’s still due by 31 January as before. MTD adds quarterly updates on top, not instead of. That layering is exactly where confusion tends to creep in.
What to do if you’re behind
Check whether you’re actually in scope before assuming you’ve missed something. The £50,000 threshold applies to combined gross income from self-employment and property, not profit. If you’re close to that line, confirm your actual position rather than guessing — getting it wrong in either direction causes problems.
If you’ve missed the first quarterly update, file it now rather than waiting for HMRC to contact you. Being proactive before HMRC’s September sign-up wave reaches you is generally treated far more favourably than being found non-compliant after the fact. Software providers most sole traders already use for invoicing or bookkeeping, such as Xero or Sage, now build MTD-compliant quarterly filing directly into their existing product.
Get your record-keeping compliant before the second quarter deadline arrives. The next quarterly update covers 6 July to 5 October, due in early November. If the first quarter was a scramble, the second doesn’t have to be — the main fix is usually just moving from a spreadsheet or shoebox of receipts to software that logs transactions as you go.
If your bookkeeping processes or client engagement letters need updating to reflect MTD’s new quarterly cadence, Smallprint has ready-made UK legal and compliance templates that save the cost of drafting from scratch.
The takeaway
Missing the first MTD deadline on 7 August doesn’t disqualify you from getting compliant — but HMRC’s September enforcement wave means the window for quietly catching up on your own timeline is closing. File the overdue update now, get quarterly bookkeeping software in place before the next deadline in November, and treat this as the moment MTD stopped being optional in practice as well as in law.
