MTD Registration Deadline: When Do You Actually Have to Sign Up?

If you have been looking for the MTD registration deadline and cannot find a straight answer, there is a reason for that.

HMRC has not set a separate deadline for registering. There is no single date in the calendar marked as the cut off for signing up to Making Tax Digital for Income Tax.

What exists instead is a practical deadline, and it is a harder one. You cannot file a quarterly update until you are signed up. So your real registration deadline is the day your first quarterly update is due, and you need to be signed up well before it rather than on the day.

For most people reading this, that date has already passed. Which is why HMRC has started signing people up itself.

The short answer

There is no formal MTD registration deadline. The date that matters is your first quarterly update deadline, because you cannot submit without being registered first.

If you were mandated from 6 April 2026, your first quarterly update was due on 7 August 2026. If you have not registered, you are late, and HMRC may sign you up automatically.

The deadlines that actually apply

These are the dates to work from. Registration has to happen before the first of them, with enough time to get software connected and records in order.

Quarterly updates are cumulative. Each one reports the year to date rather than that quarter on its own, which matters a great deal if you are catching up.

When you come into MTD depends on your income

The rollout is happening in stages. Which stage you are in depends on your qualifying income, which is your gross income before expenses, from self employment and UK property added together.

Two things people get wrong here, repeatedly.

It is gross income, not profit. Someone turning over £56,000 with £20,000 of costs has qualifying income of £56,000. The profit does not come into it.

It is combined. A trade and a rental property go in the same pot. Neither has to reach the threshold alone.

If you want to check your own position properly, our MTD eligibility checker takes about a minute and tells you which year you come in. Our guide to MTD qualifying income explains what counts and what does not.

Why there is no formal registration deadline

It is worth understanding this rather than just accepting it, because it changes what you should do.

HMRC does not treat registration as an event with its own penalty. There is no fine for registering late in itself. The obligation that carries consequences is the obligation to file, and to keep digital records.

Registration is simply the gate you have to go through before you can meet those obligations. Miss it and you do not get fined for missing it. You get fined, eventually, for everything downstream that you then could not do.

That is why the advice everywhere is to sign up as early as possible rather than by a particular date. The sign up itself takes a few minutes. Everything around it does not.

What happens if you have not registered

Here is the honest position, which is less alarming than people expect for this year specifically.

No penalty points for late quarterly updates in 2026/27. HMRC has confirmed a soft landing for the first year. If you are late with one, two or all four of this year’s updates, you do not pick up points.

But the obligation does not go away. You still have to file every update. You cannot complete your Final Declaration until all four are in, so a skipped update sits there and blocks your year end return.

And the soft landing does not cover everything. It does not cover your Final Declaration, due 31 January 2028. It does not cover paying your tax late. And it does not cover failing to keep digital records, which can attract penalties of up to £3,000 regardless of whether you filed on time.

We go through exactly what is and is not covered in our guide to the MTD soft landing.

HMRC is now registering people automatically

This is the part that has changed the picture since MTD launched.

When the 7 August 2026 deadline passed, the numbers were well short. Around 864,000 sole traders and landlords were supposed to be in MTD. Just over 570,000 had signed up, and around 436,000 had filed. That left roughly 294,000 people who were mandated and had done nothing.

From September 2026, HMRC began signing them up itself, in stages, writing to each person once they have been enrolled.

Three things worth knowing about that letter.

Your accountant does not get a copy. HMRC writes to the taxpayer only. If you have an accountant and you do not forward it, they will not know your obligations have started.

Being enrolled is not being ready. The letter means you are in the system. You still need HMRC recognised software, a connected bank feed, and digital records going back to 6 April. None of that comes with the letter.

It only affects the 2026/27 group. If your income means you are not due in until 2027/28 or 2028/29, nothing has changed for you yet.

You are still better off registering yourself

Even now, with automatic enrolment running, doing it yourself is the better option. Three reasons.

You choose your software properly. Once HMRC enrols you the clock is already running, and software picked under pressure is software you switch away from six months later.

HMRC is working from old figures. The automatic process uses your earlier tax return. If your business has closed since, or your rental income stopped, HMRC does not know. People are being enrolled into obligations that no longer apply to them.

A pending exemption can be overtaken. If you have applied for an exemption and it has not come back, automatic enrolment can sign you up anyway.

You can still register yourself at any point, and an accountant can still register you, even while the automatic process is running. Our guide on how to register for MTD walks through the HMRC screens step by step.

If you are late, do these three things

In this order. The registration is the quick part.

1. Confirm whether you are already registered. You may have been enrolled automatically without realising, particularly if post goes to an old address. Check before you try to register again.
2. Get HMRC recognised software in place. This is the step that takes longest, so start it early. We compare the main options in our guide to the best MTD software in the UK, and there are free HMRC accounting software choices that meet the rules in full.
3. Rebuild your records back to 6 April. Bank transactions, invoices, receipts and expenses from the start of the tax year. Because updates are cumulative, this is one job rather than four.

Then file what you have missed and carry on from the next deadline.

If you should not be in MTD at all

Do not wait for the automatic process to reach you. Contact HMRC and tell them.

The usual reasons are that your qualifying income sources stopped before 6 April 2026, or that an exemption applies to you. Exemptions exist for people who cannot reasonably use digital tools, on grounds including digital exclusion, disability, remoteness of location and religious belief. They are not granted automatically and you have to provide evidence. Our guide to MTD exemptions sets out who qualifies.

If you have already applied and heard nothing, chase it rather than assuming it is handled.

Common questions

Is there an official MTD registration deadline?

No. HMRC has not set a separate deadline for signing up. The date that matters in practice is your first quarterly update deadline, because you cannot file without being registered.

What was the deadline for the April 2026 group?

The first quarterly update was due 7 August 2026, so registration needed to happen before then. That date has passed, which is why HMRC began automatically enrolling people from September 2026.

Is there a fine for registering late?

Not for the registration itself. Penalties attach to late filing, late payment and failures to keep digital records. For 2026/27 there are no penalty points for late quarterly updates, but the other obligations still carry consequences.

How long does registration take?

The sign up itself takes a few minutes. Getting properly set up, with software connected and records brought up to date, takes considerably longer. That gap is what catches people out.

Can I register after my first quarterly update deadline has passed?

Yes. You register, then catch up. Because quarterly updates are cumulative, catching up means getting your records straight once rather than filing a backlog of separate returns.

When is my deadline if I am in the April 2027 group?

Your first quarterly update would fall in August 2027, so you want to be registered and set up well before April 2027 when your digital record keeping obligation begins.

Does the deadline change if my income drops?

Not by itself. Mandation is based on an earlier tax year’s figures, so a fall in income does not end the obligation automatically. Check your position each year rather than assuming you have dropped out.

Not sure where you stand?

If you do not know whether you are registered, whether you are late, or what a letter from HMRC actually means, tell us and we will find out for you.

We register people with HMRC, set up their software, rebuild records back to the start of the tax year and file what has been missed. Including for people who are several quarters behind.