428,000 Missed the First MTD Deadline. HMRC Is Now Signing Them Up Without Telling You.

The first Making Tax Digital for Income Tax deadline passed on 7 August, and 428,000 of the 864,000 people in scope missed it

Then - nothing happened. No fines, no letters, no consequences a client would notice.

What happened?

Well, the first deadline did not sort taxpayers into compliant and fined.

It actually sorted every client book in the country into four different states, and each state has a different job attached to it before the next deadline on 7 November.

Because the sign-up rules themselves just changed. From this month, HMRC does it for anyone who hasn't:

Doing nothing used to be a choice. From September, doing nothing means enrolled.

Who has to sign up for MTD for Income Tax?

Anyone with qualifying income over £50,000 from self-employment and property is mandated for the 2026/27 tax year. Qualifying income means turnover, not profit: the total before expenses.

The threshold falls to £30,000 in April 2027 and £20,000 in April 2028, bringing roughly a million more taxpayers in at each step.

Signing up has been the taxpayer's or agent's job so far, and agents have carried most of it: agents completed 69% of all registrations, some 393,000, with taxpayers doing the rest.

That version of the world ends in September. HMRC is now signing up mandated taxpayers who have not registered, in batches, with a checking step carried out by the taxpayer or their agent.

HMRC will not tell the agent it has enrolled a client, either. The letter goes to the taxpayer, so the first a practice hears may be the phone call.

Which means the question for a practice is no longer "which clients should we sign up?"

It is "which clients is HMRC about to sign up without us?"

The four states every client book is now in

Run the first quarter's numbers as a set and the four populations fall out of the arithmetic.

Of the 864,000 people mandated, more than 570,000 registered, and 436,000 filed their first quarterly update on time.

Subtract one from the other and around 134,000 people did the hard part, registering, and still missed the filing.

Another 294,000 never registered at all, and they are the population HMRC starts enrolling this month.

The remainder sit in a queue nobody talks about: exemption applications are running behind, so some clients are waiting to be told whether the regime applies to them at all.

The three-tier service triage most firms built this spring still stands; we mapped it in the MTD maths on firm capacity.

But tiers describe how you serve a client. States describe where the client actually landed, and a Tier A client can still be sitting in state two.

State two is the strangest one: registered, then silent

The 134,000 are worth a moment, because they break the lazy explanation. These are not people who ignored MTD.

They, or their agent, completed a registration process that ICAEW had flagged for sign-up failures and mismatched records. They cleared the hard gate, then missed the easy one.

The typical file shows both halves: a sign-up confirmation from the spring, and a records request underneath it that never got an answer.

Practitioner surveys point at the reason. In a post-deadline survey run by Robyn Milstead of LKA Chartered Accountants and Tom Bickle of Accountants Therapy, 84% of agents charged for MTD work but only 25% fully recovered the time.

The unrecovered time is mostly the same activity: chasing records that arrive late, incomplete, or not at all.

A registration is a one-off event. Filing is a collection habit that has to fire four times a year, on dates the calendar owns.

The state-two population is what it looks like when the event happens and the habit does not.

Why the grace year is a loan, not a gift

Missing a quarterly update in 2026/27 earns no penalty points. HMRC's own penalty guidance applies points to quarterly updates only for tax years after 2026/27: from then, each missed submission deadline earns a point, and at four points the £200 penalties start.

We have covered the fine print of what the soft landing does and does not protect separately.

Now put dates on what the grace year is buying.

In April 2027 the points regime switches on for quarterly updates. In the same month, the £30,000 cohort arrives, roughly a million more taxpayers.

And the third deadline of the current year, 7 February, lands in the middle of Self Assessment season, which every practice already runs at capacity.

In the LKA survey, agents rated their confidence in managing Q2 workloads at 6.4 out of 10, falling to 3.9 out of 10 for the £30,000 cohort.

On an AccountingWEB panel after the deadline, one firm counted 200 or more MTD returns plus 75 VAT returns inside one five-week window once its next 130 clients are mandated; another put the shortfall at 25% to 40% more capacity than it has.

Fraser Campbell, UK head of accountancy and business advisory services at Azets, gave the procrastination version of the same maths: a taxpayer who waits until the 2027 cycle to engage faces nine returns inside a single twelve-month period.

So the honest reading of the missed-deadline story is not "nothing happened."

It is "nothing happened yet, and the invoice arrives in April 2027."

What to do before 7 November, state by state

For the filed: protect the thing that worked. Write the record cut-off date into the client's calendar ahead of the statutory one, and treat Q1's process as a template rather than a memory.

One quiet trap for anyone not yet filed: the choice between standard tax-year quarters and calendar quarters is locked per income source once the first update is submitted, so it is a decision to make deliberately, not by default.

For the registered-but-silent: fix collection before the willpower conversation. A skipped update does not disappear; it queues in front of the final declaration.

The practical question is why the records never arrived, and the answer is usually that the chase depends on a person remembering rather than a system prompting. This is the state where firms burn unbilled hours, and the survey's 25% full-recovery figure says most are already absorbing the cost.

For the unregistered: get to them before HMRC's letter does.

Identify them from 2024/25 Self Assessment data, and pre-brief them on what the enrolment letter means, because the Agent Services Account shows only HMRC reference numbers, which makes matching enrolled clients back to your own records slower than it should be.

For the exemption-pending: chase every open application and put the evidence behind it in one place.

Auto-enrolment does not wait for the queue, so an application that sits unanswered is a client who may be enrolled anyway, then has to be unpicked.

The quarterly cycle is a collection problem wearing a compliance costume

Strip the four states back and one mechanism produces all of them: records move between client and firm four times a year now, and most firms still run that movement on memory, inboxes and goodwill.

Serenity Accounts, a UK accounting and bookkeeping practice, is a useful before-and-after because its problem was exactly this shape.

Requests, signatures and documents lived across emails and separate tools, and the chase was manual. Moving collection into one system, where every request, upload and approval files itself against the client, reclaimed more than 400 hours a year.

"I know instantly what's been sent, what's been signed, and what's still waiting. I don't have to chase anymore." - Ben Symons, director, Serenity Accounts

That sentence, read against the four states, is the whole game.

A firm that can see what is outstanding, per client, without opening an inbox, is a firm whose clients stay in state one.

Where the evidence layer fits

Everything above works whatever software your practice runs.

Where Workiro fits is the layer underneath the quarterly cycle: client records requested through a link that needs no password, chased automatically, and filed against the right client with the approval trail building as the work happens, connected to the tax and practice tools UK firms already use.

If the four-state table put names from your own book in your head, that is the demo to book: bring one state-two client and we will show you what their quarterly collection loop looks like when the system does the chasing.

Book a walkthrough. Not demo-ready? Start with how firms run tax return collection without the chase.