How to register for MTD for Income Tax as a sole trader
What you need, how to sign up with HMRC, and why you can volunteer early — a plain-English walkthrough for self-employed sole traders.
There's no separate "MTD registration". You sign up for Making Tax Digital for Income Tax with HMRC (or your agent does it for you), then connect MTD-compatible software. You'll need a Government Gateway user ID, your National Insurance number, and software. You can sign up voluntarily before your mandatory start date to get used to it.
First: do you actually need to?
Only sign up if your qualifying income is over the threshold for your phase (over £50,000 → April 2026; over £30,000 → April 2027; over £20,000 → April 2028), measured on your most recent tax return. If you're not sure, read what counts as qualifying income or check your status in seconds. Below the threshold, you don't need to sign up (though you can volunteer).
What you'll need
- A Government Gateway user ID (the same kind you use for Self Assessment).
- Your National Insurance number.
- Your business details (when you started; your accounting period).
- MTD-compatible software — to keep digital records and send updates.
How to sign up
- Check you're in scope (qualifying income over the threshold).
- Get MTD-compatible software set up first, so you can authorise it once you're signed up.
- Sign up via HMRC's "Sign up for Making Tax Digital for Income Tax" service (on GOV.UK) using your Government Gateway ID — or have your accountant sign you up through their Agent Services Account.
- Authorise your software to talk to HMRC on your behalf (a one-time consent).
HMRC will write to people who are over the threshold, but the responsibility to sign up and be ready by your start date is yours — a letter isn't a prerequisite.
Signing up early (voluntary)
You don't have to wait for your mandatory date. Signing up voluntarily lets you practise quarterly updates for a year or two before they're compulsory — a low-risk way to smooth the transition, especially while 2026/27 is a soft-landing year for penalties.
What happens after you're signed up
You keep digital records and send HMRC a cumulative quarterly update for each business source (due 7 August, 7 November, 7 February and 7 May), then a final declaration by 31 January after the tax year — which replaces the old Self Assessment return. The mechanics are in MTD quarterly deadlines explained.
Frequently asked questions
Do I register for MTD or sign up?
There's no separate "MTD registration". If you already file Self Assessment you're registered for tax — you sign up for Making Tax Digital for Income Tax, either through HMRC's online service or via your agent.
What do I need to sign up?
A Government Gateway user ID, your National Insurance number, and MTD-compatible software. HMRC also looks at your most recent return to confirm you're over the threshold.
Can I sign up before I'm mandated?
Yes. You can volunteer early to get used to quarterly updates before your mandatory start date.
Do I still need software if I sign up?
Yes — MTD for Income Tax requires compatible software to keep digital records and send quarterly updates. A plain spreadsheet on its own isn't enough unless used with bridging software.
Related guides: What counts as qualifying income · MTD when you're employed and self-employed · MTD quarterly deadlines explained
Guidance only, not tax advice. Based on HMRC rules as at June 2026. Always check your specific circumstances with HMRC or a qualified adviser.