Almost everything written about Making Tax Digital for Income Tax over the past year describes the rules that the April 2026 intake received. That intake was the smallest of the three, 864,000 people on HMRC's own count, and it arrived under the most forgiving conditions the regime will ever offer.

The next group is larger, 1,077,000 individuals with qualifying income between £30,000 and £50,000 on HMRC's August 2025 statistics, joins on 6 April 2027, and meets a different set of rules on arrival. Its membership is decided by a number that practices are calculating right now, in the middle of an ordinary filing season, mostly without noticing.

The 2025-26 return on a desk this autumn is the test. Qualifying income over £30,000 in that year brings the client in from 6 April 2027.

• HMRC: "If your qualifying income is over £30,000 for the 2025 to 2026 tax year, you will need to use it from 6 April 2027".
• The test year is 2025-26, which is the return being prepared this filing season. Identification is available now, from work already in progress.
• The 2027 intake gets no waiver on quarterly updates. Points apply "for tax years after 2026 to 2027", at a 4-point threshold and a £200 penalty.
• Late payment rates are higher in the year they join: 4% at day 15 and a further 4% at day 30 for 2027-28, against 3% and 3% for 2026-27.
• The 30-day payment grace is framed by HMRC personally, "In your first year of new penalties", reducing to 15 days "After your first year".
• HMRC's published penalty guidance addresses the April 2026 population. The 2027 position has to be assembled from a page written for somebody else.

The regime arrives in tranches, each defined by a threshold and the tax year in which qualifying income is measured.

HMRC's wording for the middle row is direct: "If your qualifying income is over £30,000 for the 2025 to 2026 tax year, you will need to use it from 6 April 2027." The first row is expressed in the past tense on the current guidance, since that date has been and gone: taxpayers over £50,000 in 2024-25 "should've started using Making Tax Digital for Income Tax from 6 April 2026".

The gap between measurement and mandation is roughly a year. That gap is the planning window, and it is the reason this belongs in a filing-season conversation rather than a spring one.

A client whose 2025-26 turnover from self-employment and property crosses £30,000 will be mandated from April 2027 whatever happens to their income in the intervening year. The decision is already made; the return simply reveals it.

Qualifying income is drawn from self-employment and property income before expenses. A client with modest profits and substantial turnover can sit comfortably inside the threshold while feeling nothing like a £30,000 business. This is the single most common source of surprise in the conversation, and it is worth raising before the client hears it elsewhere.

The concession granted to the first intake is written against a tax year rather than against a taxpayer. HMRC's wording is that there are no penalties for missing a quarterly update deadline "for the 2026 to 2027 tax year", and that points apply "for each quarterly update (for tax years after 2026 to 2027) or tax return deadline you miss".

A client joining on 6 April 2027 is joining in 2027-28. Their first quarterly update, due 7 August 2027, carries a point if it is late.

The published rates step up between the two years.

HMRC's wording for the daily charge is identical in both years: "an annual rate of 10% per year on the outstanding amount, charged daily from day 31". Late payment interest runs separately and from day one, and HMRC confirms "There are no changes to how late payment interest works."

One relief is framed by the taxpayer's own position. HMRC: "In your first year of new penalties, you have 30 days from the payment due date to either: make full payment; contact HMRC to set up a payment plan", and "After your first year, this reduces to 15 days."

Read plainly, that language points to a 2027 joiner receiving the same 30 days during their own first year, and HMRC's own late-payment table agrees: the 2027-28 column carries the same carve-out, "4% of the tax owed at day 15, or no penalty if it's your first year". So the 30-day window is on HMRC's page for the year a 2027 joiner arrives. What HMRC has not done is write a sentence addressed to that group, so record the reading and its source in the file note rather than promising it in a letter as though it had.

HMRC's penalty guidance is written for the population already inside the regime. It explains the 2026-27 waiver, sets out the points ladder, and gives the late payment rates for both years in one place.

What it does not do is address a 2027 joiner directly. Their position has to be assembled: the mandation date from one page, the waiver's expiry from a parenthesis on another, the applicable payment rates from a table covering two years, and the first-year concession from a sentence written in the second person to a different reader.

That assembly is precisely the work an adviser gets asked to have already done when a client rings in March 2027. It is also the kind of question where reading the underlying provision beats reading a summary of it, because the summaries currently circulating were written for the earlier group. A research tool that returns cited answers grounded in UK legislation and HMRC guidance makes the assembly checkable rather than remembered, and our sources and update policy explains how we track pages that change mid-year, as these have.

The work is small if it happens alongside the returns, and awkward if it happens later.

1. Add one field to the 2025-26 workflow. Record combined self-employment and property turnover for every unincorporated client as the return is prepared. That single figure answers the mandation question for the whole book.
2. Split the list three ways. Comfortably over, comfortably under, and within a few thousand pounds of £30,000. The third group is where the conversations belong.
3. Write to the "over" group before spring. Tell them the date, the four quarterly deadlines they will meet from August 2027, and that their year carries points from the first one.
4. Check what your existing MTD material says. Any note describing a penalty-free first year needs the tax year naming it, or it becomes wrong the moment it reaches a 2027 client.
5. Price the work now. A client moving from one annual submission to four updates plus a return is a different engagement. Deciding that in a letter this winter is easier than deciding it in a phone call next autumn.

In practice: Clients near the threshold will ask whether they can stay under it. Qualifying income is measured on turnover for a year that has already ended, so for the 2027 tranche the answer is settled. The useful conversation is about readiness, not avoidance.

If you want to see how a tool handles the layered wording in these pages, create a free account and put your own 2027 mandation questions to it.

The April 2027 tranche is larger than the one that preceded it, 1,077,000 against 864,000, arrives without the concession that made the first year survivable, and is defined by a figure most practices are calculating this month for another purpose entirely.

None of the individual rules are difficult. The difficulty is that they sit in three places, one of which is addressed to a different group of taxpayers, and the client will assume the version they read last year still applies.

A practice that captures one extra number during the 2025-26 returns, and writes to the clients it identifies before spring, converts a scramble into a mailing. The information is already passing through the office. It only has to be written down.

For the mechanics of what happens when a quarterly update is missed once a client is inside the regime, see our article on missed MTD quarterly updates and penalty points. For criteria when assessing research tools that keep pace with this sort of staged change, see how to choose AI tax research software in the UK, and the limitations and responsible use page on where professional judgement stays with the adviser. Firms planning a multi-seat rollout can book a call.

HMRC's guidance states that if your qualifying income is over £30,000 for the 2025 to 2026 tax year, you will need to use Making Tax Digital for Income Tax from 6 April 2027. Qualifying income is drawn from self-employment and property income measured before expenses, so turnover rather than profit decides the question.

No. The concession applies to the 2026 to 2027 tax year rather than to each taxpayer's first year. HMRC's penalty guidance states that points apply for each quarterly update for tax years after 2026 to 2027, so a client joining on 6 April 2027 is inside the points regime from their first quarterly deadline.

The threshold is four points, and reaching it produces a £200 penalty. Points attach to missed quarterly update deadlines in tax years after 2026-27 and to missed tax return deadlines. Where a taxpayer stays below the threshold, each point is automatically removed 24 months after the missed deadline.

For 2026-27 the charge is 3% of the tax owed at day 15 and a further 3% at day 30. For 2027-28 both steps rise to 4%. HMRC's own table adds "or no penalty if it's your first year" to the day-15 step in both years, which is the 30-day window discussed above. In both years an annual rate of 10% on the outstanding amount is charged daily from day 31, and late payment interest runs separately from the first day the payment is late.

The 2025 to 2026 tax year. That is the return being prepared during the filing season ending 31 January 2027, which means the answer is available from work a practice is already doing rather than requiring a separate exercise.

Qualifying income over £50,000 for 2024-25 brought taxpayers in from 6 April 2026. Over £30,000 for 2025-26 brings them in from 6 April 2027. Over £20,000 for 2026-27 brings them in from 6 April 2028. Each tranche is measured on a tax year that ends roughly a year before the mandation date.