How to Get Started With MTD ITSA Before April 2026
A practical, no-jargon guide to getting started with MTD ITSA for UK sole traders. Deadlines, registration steps, software choices, and what to do first.
April 2026 is closer than your next VAT return. If you are a sole trader earning above £50,000, HMRC expects you to be fully compliant with Making Tax Digital for Income Tax Self Assessment by then, and the clock is already running.
This is not another vague overview. This is the exact sequence of steps you need to follow to get started with MTD ITSA without wasting a weekend, overpaying for software, or discovering on day one that you have missed something HMRC buried in a policy note.
- MTD ITSA is mandatory for sole traders earning over £50,000 from April 2026, and over £30,000 from April 2027.
- You must sign up through HMRC's MTD ITSA service before your first quarterly deadline, not on it.
- You need HMRC-compatible software before you register; the two steps are linked.
- Quarterly updates are summaries of income and expenses, not full tax returns, but they are legally required submissions.
- Missing the registration window does not exempt you from penalties; it adds to them.
- MTD ITSA
- Making Tax Digital for Income Tax Self Assessment. HMRC's scheme requiring sole traders and landlords to keep digital records and submit quarterly updates of income and expenses through approved software, replacing the annual Self Assessment tax return for those above the income threshold.
Who Actually Needs to Get Started Right Now
Let us be precise, because HMRC's own communications have managed to confuse this repeatedly.
From 6 April 2026, MTD ITSA is mandatory if your total qualifying income (self-employment plus property income combined) exceeds £50,000 in the tax year.
From 6 April 2027, the threshold drops to £30,000.
A further extension to £20,000 has been announced by the government for a later, unconfirmed date.
If you are a plumber earning £62,000, an electrician turning over £55,000, or a freelance consultant billing £80,000, you are in scope from April 2026. That means your first quarterly update covers the period from 6 April 2026 to 5 July 2026, with a submission deadline of 5 August 2026.
You cannot sign up on 5 August and submit the same day. HMRC's system requires advance registration, and the software needs to be connected and tested before that first deadline arrives.
Step One: Check Whether You Are Actually in Scope
Before you spend a penny on software or an hour on registration, confirm your numbers.
HMRC uses your gross trading income before expenses. If you earned £52,000 in turnover last year but only kept £34,000 after costs, you are still in scope. The threshold is based on income, not profit.
If you have both self-employment income and rental income, HMRC adds them together. A sole trader earning £35,000 from their trade and £18,000 from a rental property is over the £50,000 threshold from April 2026.
Not sure what your figure looks like? Run the numbers using our How Much Tax Should I Pay? UK Calculator Explained guide before you proceed.
If you are genuinely below £50,000, you are not legally required to join yet. Voluntary participation is possible but optional.
Step Two: Choose Compatible Software Before You Register
This is the step most people get wrong. They attempt to register with HMRC first and then scramble for software. HMRC's MTD ITSA registration process assumes you already have a compatible product in place, because the software generates the API connection that makes the whole thing work.
HMRC maintains a list of software recognised for MTD ITSA. As of 2025, this includes products from providers such as QuickBooks, FreeAgent, Xero, TaxCalc, and TapTax. The list is updated regularly.
When choosing, ask these four questions:
- Does it support MTD ITSA quarterly updates and the End of Period Statement? Some products only support MTD VAT. They are not the same.
- What does it actually cost per year? Some vendors advertise low monthly prices and add on extra charges for Self Assessment functionality.
- Can you access it on a phone? If you are on site five days a week, desktop-only software is a friction point that will cause you to fall behind.
- Does it import from your existing bookkeeping? Switching is painful. Switching to MTD Software Without Losing a Day's Work covers what to look for.
TapTax is built specifically for sole traders who do not want an accounting degree to file quarterly. It connects directly to HMRC, categorises income and expenses in plain English, and sends you a reminder before every deadline.
Step Three: Register for MTD ITSA Through HMRC
Once your software is ready, you register through HMRC's online MTD service. You will need:
- Your Government Gateway user ID and password (the same one you use for Self Assessment)
- Your National Insurance number
- Your Unique Taxpayer Reference (UTR)
- The start date you want your MTD obligations to begin (HMRC typically sets this as the start of the next tax year)
The registration process itself takes around fifteen minutes. HMRC confirms acceptance within 72 hours in most cases, though during peak periods closer to April it can take longer.
Do not leave this until March 2026. HMRC's system was not designed for half a million sole traders registering simultaneously. Delays during the 2019 MTD VAT rollout caused businesses to miss their first submission deadlines through no fault of their own. HMRC penalised them anyway.
Aim to register by January 2026 at the latest. Earlier is better.
Step Four: Understand What a Quarterly Update Actually Is
There is a persistent misconception that quarterly updates are mini tax returns. They are not, and confusing the two leads to unnecessary stress.
A quarterly update is a summary submission of your total income and total expenses for that three-month period, categorised by HMRC's standard expense categories. You are not calculating your tax bill at this point. You are not making a payment. You are simply telling HMRC: here is what came in and what went out.
HMRC uses these four quarterly updates to give you a running estimate of your tax liability throughout the year. The actual tax calculation happens later, via the End of Period Statement (EOPS) and the Final Declaration (which replaces the current Self Assessment return).
The four quarterly periods are:
| Quarter | Covers | Deadline |
|---|---|---|
| Q1 | 6 April to 5 July | 5 August |
| Q2 | 6 July to 5 October | 5 November |
| Q3 | 6 October to 5 January | 5 February |
| Q4 | 6 January to 5 April | 5 May |
Missed a deadline? Read What Happens If You Miss an MTD Deadline: The Real Cost before you decide whether to delay further.
Step Five: Set Up Digital Record-Keeping From Day One
MTD ITSA does not just require you to submit quarterly. It requires you to keep digital records throughout the year. A spreadsheet reconstructed from memory in July does not comply.
Digital record-keeping means that every transaction is recorded in an HMRC-compatible system at or near the time it occurs. In practice, this means:
- Logging income as invoices are raised or payments received
- Photographing receipts and categorising them as expenses at the time
- Not relying on bank statements alone (though bank feeds in apps like TapTax help significantly)
This is genuinely the biggest behavioural change MTD ITSA demands. The quarterly submission takes minutes if your records are current. It takes hours if they are not.
For tradespeople who spend the day on site, the simplest approach is a dedicated mobile app that lets you photograph a receipt and assign it a category in under thirty seconds. The alternative is a Friday-afternoon ritual of processing a week's worth of crumpled paper, which nobody maintains long-term.
Step Six: Do a Test Run Before Your First Deadline
HMRC has encouraged software providers to offer sandbox environments for testing, and most reputable MTD ITSA apps include a guided first-submission walkthrough.
Before your first real quarterly deadline in August 2026, run through the following:
- Connect your software to HMRC's API (usually done via a one-time authorisation in the app)
- Enter a month's worth of dummy transactions
- Generate a quarterly update summary and check the categories look correct
- Confirm the submission pathway works end to end
If you hit an error during this test run, you have weeks to resolve it rather than hours before a deadline. Common API connection errors and how to fix them are covered in HMRC MTD Error Codes: What They Mean and How to Fix Them.
What About the End of Period Statement?
Once your fourth quarter is submitted, you are not quite done. The End of Period Statement (EOPS) is an additional submission that confirms your annual figures are complete and accurate. You can also add any annual adjustments at this stage, such as capital allowances or overlap relief.
After the EOPS, you submit a Final Declaration confirming all your income sources for the year. This is the document that triggers your tax calculation and your January payment on account.
The full EOPS process is explained in How to Submit an End of Period Statement for MTD.
People also ask
The Honest Timeline for Getting Started
If your income is over £50,000 and you are reading this in 2025, here is the realistic schedule:
Now: Confirm your income figure and whether you are in scope.
Summer to Autumn 2025: Research and choose your MTD ITSA software. Most providers offer free trials. Take one.
October to December 2025: Begin using the software for live bookkeeping, even before you are legally required to. This builds the habit before the stakes are high.
January 2026: Register with HMRC via the MTD ITSA sign-up service.
February to March 2026: Do a test submission in your software. Resolve any connection issues.
5 August 2026: Submit your first quarterly update, which should take under thirty minutes if the previous steps are done.
The sole traders who will struggle in 2026 are not the ones who lack the skills. They are the ones who assumed they had more time than they did, or that HMRC would somehow make it easier than it has made every previous digital transition.
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