The letter arrives in September. HMRC has checked your Self Assessment records and decided you need to use Making Tax Digital for Income Tax from now on. If you are a sole trader or landlord whose qualifying income was more than £50,000 in the 2024 to 2025 tax year, you should have been using it since 6 April 2026. From September 2026 HMRC starts signing up anyone in that position who has not signed up themselves, in stages. It does not wait for you to feel ready.
Most founders I meet think Making Tax Digital is someone else's problem. Their business is a limited company, they tell me, so the digital tax thing does not apply. That is half true and it is the dangerous half. Your company is not in scope of MTD for Income Tax. But if it is VAT registered and not exempt, it has been in scope of MTD for VAT since April 2022, and at £1m plus of taxable sales it will be registered. And you personally might be in scope for Income Tax if you have qualifying income outside the company: a buy to let, a sole trader consultancy. Your share of partnership profit does not count towards qualifying income, although it still goes on your annual return.
I am a specialist e commerce accountant, and I spend my days in the books of brands scaling from £1m to £20m. The books are never simple by the time they reach me. Three marketplaces, four currencies, stock in two warehouses, settlement reports nobody named. MTD was designed for simple affairs and it is landing on exactly the businesses whose affairs are anything but. This post is the map: who is in, what quarterly updates mean for complex books, what counts as digital, and what the penalty machine costs. Rules checked against gov.uk guidance on the day this went out.
The Quick Summary
MTD for Income Tax applies to individuals only: sole traders and landlords registered for Self Assessment. Qualifying income over £50,000 for the 2024 to 2025 tax year means you should have started from 6 April 2026. Over £30,000 for 2025 to 2026 means April 2027. Over £20,000 for 2026 to 2027 means April 2028. Partnerships are next in line but no date is set. Limited companies are not in scope of Income Tax MTD at all.
In scope means three things: keep your records digitally in MTD-compatible software, send HMRC a quarterly update every quarter, and still file your Self Assessment tax return and pay by 31 January. The quarterly updates do not replace the annual return. Nothing replaces the annual return.
If HMRC's records show your qualifying income was more than £50,000 in the 2024 to 2025 tax year and you have not signed up yourself, HMRC starts signing you up in stages from September 2026. Missing the 2026 to 2027 quarterly update deadlines costs no penalty points, that is a one year soft landing for quarterly updates. From 2027 to 2028 the points machine is on.
Who Making Tax Digital Actually Catches
Get the scope right first, because most of the panic I hear is about the wrong people. MTD for Income Tax is built around qualifying income: your gross income from self-employment and property combined, before you get to the deductions.
The thresholds, in plain English:
Over £50,000 for the 2024 to 2025 tax year: use MTD for Income Tax from 6 April 2026. If you have not signed up, that is the problem to fix this week, because HMRC starts doing it for you from September 2026.
Over £30,000 for the 2025 to 2026 tax year: from 6 April 2027. HMRC reviews your return each year and writes to you if you cross the line. Not receiving a letter does not let you off. The guidance says it plainly: it is still your responsibility to check.
Over £20,000 for the 2026 to 2027 tax year: from 6 April 2028. The Autumn Budget 2024 confirmed the extension, Spring Statement 2025 fixed the date, and the legislation is in place.
Now the groups who think they are in and are not. A director with a limited company owes nothing under MTD for Income Tax on the company's trading income: companies file corporation tax and that is a separate system. Partnerships are not yet mandated and the timeline is not set. And if you are exempt, for reasons like digital exclusion, you still file a Self Assessment return as normal; the exemption only takes the digital reporting off you.
Here is the scale-up twist that catches people. The limited company does not shield the founder. Your company is a separate taxpayer, but you are a separate taxpayer too. Run a buy to let alongside the brand, or do consultancy through a sole trader business, and your personal qualifying income is what counts. I have seen the pattern repeatedly: the company books are immaculate because they have to be, and the founder's personal side income is a spreadsheet that last got updated in March. That spreadsheet is exactly the income MTD is coming for.
And the company itself is not off the hook, it is already in a different MTD. All VAT registered businesses must use Making Tax Digital for VAT unless HMRC has granted an exemption, and that has included businesses below the registration threshold since April 2022. The registration threshold itself is more than £90,000 of VAT taxable turnover, excluding VAT, so a £1m plus brand with taxable sales is well past it. The digital records and digital links rules are not coming for you, they are here. We covered the threshold maths in our VAT registration post, and the platform side in marketplace VAT at £1m plus.
What Quarterly Updates Mean When Your Books Are Complex
Here is where MTD stops being an admin footnote and starts being a discipline problem. As an MTD for Income Tax user you send one quarterly update every three months for each sole trade and property business you have, then one Self Assessment tax return through the same software at the end of the year. The quarterly update deadlines for the 2026 to 2027 tax year are 7 August, 7 November, 7 February and 7 May. Each update is cumulative: it covers the start of the tax year through to the latest quarter end, not just the previous three months.
Notice something about that first date. Your VAT return for the quarter ending 30 June is due by 7 August too: one month and seven days, the standing VAT rule. So 7 August 2026 is the day the VAT return and the first Income Tax update can land together for a founder with a company and side income. Two filings and two sets of records can land on one deadline day. The same software suite may handle both, so two products are not required. That is not a coincidence, that is the calendar.
Now add the marketplace layer. TikTok Shop settles on delivery-based periods of one, three, eight or thirty-one days, with reserves on top. Amazon runs its own fourteen day settlement cycles. Shopify Payments has a minimum settlement time of three business days, after which banks typically take another day or three. A quarterly update uses a fixed cut-off date, but the figures are cumulative from the start of the tax year, and your platforms hand you money in overlapping cycles that respect none of those cut-offs. Reconciling that properly is the same work we describe for platform reporting reconciliation, except now it has a hard deadline four times a year.
Here is the worked version. Take a founder with a limited company doing £2m across TikTok Shop, Amazon and their own site, plus £60,000 of gross sole trader consultancy income in the 2024 to 2025 tax year. The consultancy turnover is £10,000 above the £50,000 threshold, so the founder has been in MTD for Income Tax since April 2026. The company's £2m does not count towards the founder's qualifying income. Every three months they must send HMRC a cumulative update for the consultancy, from the start of the tax year, in MTD-compatible software. HMRC does not require a bank reconciliation before the update, but the records must be accurate. Meanwhile the company's VAT return, which covers the marketplace sales, is due a month and seven days after each quarter end. Both land in the same week in August. Treat the quarterly update as a low priority because the consultancy is only a small part of the founder's wider picture, and the points start stacking in 2027 to 2028.
The brands that sail through this are the ones already running monthly management accounts. The quarterly update is just a cut of a process they already have. The brands that struggle are the ones whose books are only touched when the accountant asks, which for a scaling business is a warning sign on its own. Our monthly accounting checklist is the fix for that, and it makes MTD nearly free.
What "Digital" Actually Requires
Digital does not mean expensive. It means specific. Under MTD you must keep the required records of your self-employment and property income and expenses in compatible software: software that works with HMRC's systems. Most records need an amount, a date and a category, and retailers can record daily gross takings instead of every individual sale. The software then sends your updates to HMRC through an API. There is a published list of software that works for Income Tax, and the same idea applies on the VAT side.
The rule that trips up real businesses is the digital link. Once data is in your software, every transfer of that data between programs must happen electronically. No copy and paste. No retyping numbers from a spreadsheet into the VAT return. HMRC's own words: cut and paste does not count as a digital link. If you run a spreadsheet next to your accounting software, the cells have to be linked, not rekeyed.
Spreadsheets themselves are not banned. HMRC accepts them for VAT with bridging software that takes the figures and files the return, and linked cells count as digital links. They work for Income Tax too, connected to compatible bridging software. One thing to know: HMRC does not provide the software itself, it publishes a software finder and you pick a recognised commercial product, some of which are free. Your affairs are not simple, so choose software that handles what your business actually does, or an accountant who has set it up before. We go through the practical stack in the multi-marketplace finance stack.
One more reality from VAT Notice 700/21: keep VAT records for at least six years, and the electronic account must hold the designatory data, each supply with its time, net value and rate, and the supplies received. If your bookkeeping is a folder of CSV exports and a prayer, that is the gap MTD exposes, the same gap we see in the MTD mistakes that trigger HMRC inquiries.
The Penalty Machine
What does 2026 to 2027 actually cost? On the Income Tax side, nothing for missing a quarterly update deadline in that tax year. That is the soft landing. But you still have to keep digital records and send the updates before you can submit your return, so it is a practice lap, not a holiday.
From the 2027 to 2028 tax year the late submission penalties are points based, in the same shape VAT businesses have lived with since January 2023. Miss a quarterly update or the return deadline and you get a penalty point. Reach four points and you get a £200 penalty, then £200 for every further missed deadline while you sit at the threshold. One point per deadline, and your Income Tax points are separate from your VAT points, so a founder can be stacking in two queues at once.
The VAT queue has been running since 1 January 2023. File your VAT return late and you collect points: the threshold is four for quarterly filers, five if you file monthly, two if you file annually. Hit the threshold and it is £200, then £200 for every subsequent late return while you stay there. A £1m brand does not fail VAT filing because the numbers are hard. It fails because the reconciliation is unfinished, and the penalty is the same either way.
Late payment penalties are the expensive half and they escalate the longer you sit on the bill. For Income Tax at the 2026 to 2027 rates: nothing if you pay within 15 days. Pay 16 to 30 days late and the penalty is 3% of the amount outstanding at day 15, unless it is your first year under the new penalties. Pass day 30 and it is 3% of the day 15 balance plus 3% of the day 30 balance, plus a daily charge at 10% a year on what is still owed from day 31. Your first year gets a 30 day window to pay or set up a plan before penalties start; after that it is 15 days. From 2027 to 2028 the fixed percentages step up to 4% and 4%. Late payment interest runs from the first day the bill is late, on top of all of it: at the current rate that is 7.75% a year.
Put numbers on it, because that is what makes it real. A £10,000 Income Tax bill paid 45 days late in the 2027 to 2028 tax year: 4% at day 15 is £400, 4% at day 30 is another £400, and 10% a year on £10,000 for the 15 days after that is about £41. Roughly £840 of penalties, plus around £95 of late payment interest for the 45 days, on top of the £10,000 you owed anyway. All for a payment that was probably late because the books were not closed. That is the real price of messy books under MTD.
There is an escape hatch and it is a good one. If HMRC agrees a payment plan and you keep to it, late payment penalties pause from the date you first contacted HMRC. A call on its own is not enough if no plan is agreed. The system rewards the call. It does not reward silence.
What To Do Now
First, work out if you are in. HMRC's own checker on gov.uk asks about your Self Assessment history and tells you if, when, and whether you are exempt. Do that this week.
Second, if you are over the £50,000 line and not signed up, sign up before HMRC does. Signing up yourself means you can check your income sources and circumstances are correct from the start, and you choose and authorise your software and your agent. If HMRC signs you up, it uses the information it already holds, which may not include recent changes. HMRC has said more than 436,000 first updates had already been filed, their own number, so the system is live and working.
Third, treat 2026 to 2027 as the transition year it is. No points for missed quarterly updates, and a first year grace on late payment penalties, but late return penalties, late payment interest and the annual return itself all still apply. That is the window to fix the underlying machine: digital records that reconcile, software that talks to your marketplaces, a monthly close instead of a quarterly scramble. If the books cannot produce a quarterly update on 7 August, the fix is the books, not the deadline.
Fourth, do not plan around MTD for Corporation Tax. HMRC has confirmed that the MTD model used for VAT and Income Tax will not be introduced for Corporation Tax; the government is doing separate work to modernise company tax returns. The discipline still pays: the brand that closes its books monthly handles any reporting regime without drama. The seven signs you have outgrown your accountant includes this one: they have not mentioned MTD to you yet.
Frequently Asked Questions
I run a limited company. Does Making Tax Digital apply to me?
MTD for Income Tax does not apply to companies. If your company is VAT registered and not exempt, it is under MTD for VAT. HMRC has confirmed the VAT and Income Tax MTD model will not be introduced for Corporation Tax. Check your own personal position separately: qualifying self-employment and property income may bring you into MTD for Income Tax.
I am a director with a buy to let and a side consultancy. Am I in scope?
If your combined gross self-employment and property income was over £50,000 for the 2024 to 2025 tax year, yes, from 6 April 2026. Over £30,000 for 2025 to 2026 means April 2027. The limited company does not shelter your personal income.
What happens if I miss a quarterly update in 2026 to 2027?
No penalty points for missed quarterly updates in that tax year. You still must keep digital records and send the updates before you can file your return. Points start in 2027 to 2028: four points means £200, then £200 per further miss.
Can I keep using spreadsheets?
Yes, with conditions. For VAT, spreadsheets work with bridging software or linked cells, as long as there is no copy and paste between programs. For Income Tax you need MTD-compatible software. HMRC publishes the list of software that works.
What counts as my qualifying income?
Your gross income from self-employment and property combined, before expenses. HMRC's checker and the qualifying income guidance on gov.uk walk through it, including jointly owned property. When in doubt, run the checker rather than guess.
The Bottom Line
Making Tax Digital is not a tax rise and it is not a software purchase. It is a deadline machine for your bookkeeping, bolted to a penalty system that escalates the longer you ignore it. The scope is narrower than the headlines suggest: individuals over the income thresholds, and VAT registered businesses unless exempt. HMRC has confirmed the same MTD model will not be introduced for Corporation Tax. But for a scaling founder the net is wide, because your personal qualifying income counts and your company has been in the VAT system since 2022.
The good news is the transition year. 2026 to 2027 has no points for missed quarterly updates and a first year grace on late payment penalties. Use it to make the books produce a number on a fixed date. From 2027 to 2028 a missed quarterly deadline earns a point, a £200 penalty lands at four points, and each further miss while you sit at the threshold costs another £200. Your VAT points are tracked separately.
If you are not sure whether you are in scope, or your books cannot produce a quarterly update to save their life, book a call and we will check your position, sort your software and get the records digital before HMRC's automatic sign-up begins in September. See how we help Shopify sellers, Amazon sellers and TikTok Shop sellers.