You've Got One Quarter Behind You. Now HMRC Wants to See It.
If you're a sole trader or landlord earning over £50,000, here's the journey your first three months just took — and exactly what happens when it lands on HMRC's desk on 7 August 2026.
This is the first time HMRC will see a slice of your year before the year is even over. It's not a tax bill, not a final number — just a running total of what you earned and spent since April. But it's the first proof that your new digital process actually works, and it sets the shape of everything that follows.
Two People, Same Deadline
MTD ITSA doesn't look the same for everyone in scope. Here's how the same quarter plays out for two different people who both cross the £50,000 line.
Sarah
Sarah invoices clients directly and buys materials weekly. Her software links to her business bank account, so most of her April–July transactions are already pulled in — she just needs to confirm the categories.
Her one blind spot: cash jobs. A few small cash payments never hit her bank feed, so she has to add them manually before her Q1 total is accurate.
Tom
Tom's rental income is straightforward — two standing orders land every month. But he also runs a small consultancy on the side, which means two separate qualifying income sources.
His task: two completely separate quarterly updates, not one combined figure. Mixing them is the single most common mistake landlords with a second income make.
Once a Year
- One Self Assessment return, filed after the tax year ends
- Records kept however you liked — spreadsheet, shoebox, memory
- HMRC saw your full picture only once, months later
Four Times a Year
- A cumulative digital update every quarter, via compatible software
- Digital records required — no more shoebox of receipts
- HMRC sees a running view of your income as the year unfolds
Your Quarter, Itemised
Think of this less as a to-do list and more as a receipt for the quarter you've already lived through. Four line items, and you're done.
What Trips People Up First Time Round
"I just put my rental income and my freelance income into one update — figured it was all the same, really."
HMRC treats each income source separately. Property and self-employment income each need their own quarterly update — always.
"My bank feed pulled everything in automatically, so I assumed it was already sorted."
A transaction sitting in your feed isn't counted until it's categorised. Uncategorised entries won't appear in your quarterly total.
"I spent hours trying to work out my tax owed for the quarter before submitting."
There's no tax calculation at this stage — just totals. Overthinking the numbers here usually creates more errors than it prevents.
How Penalties Actually Work
2026/27 — This Year
Soft landing. No penalty points for late quarterly updates while everyone gets used to the system.
From April 2027
Enforcement begins. Missed updates start earning penalty points from this point forward.
Points Threshold Hit
A fixed financial penalty follows once you cross the points threshold — designed to catch a pattern, not one slip.
Your year-end Self Assessment deadline sits completely outside this — its own penalties apply regardless of the quarterly grace period.
Quick Questions, Straight Answers
If You'd Rather Someone Else Handled This
A large share of people in scope hadn't even registered weeks after MTD went live — and the ones who are ahead of it right now are mostly working with an accountant, not doing this solo. At Accounting Crunchers, we connect your software to HMRC, categorise the quarter properly, and file it — so this whole story becomes one line on your to-do list, not four.
Behind on Your First MTD Quarterly Update?
Get in touch today and let's get your Q1 submission filed accurately, before 7 August 2026.
Book a Free Consultation Email UsReference: HMRC, Use Making Tax Digital for Income Tax guidance — gov.uk/guidance/use-making-tax-digital-for-income-tax
This article is for general information only and is not a substitute for professional tax advice specific to your business.