How to Sign Up for MTD for Income Tax

Modified on Wed, 18 Feb at 9:48 AM

1. Sign in with Your Government Gateway Account

Log into HMRC with your Government Gateway credentials. You will be prompted to confirm your identity and business details.

2. Check You Are Eligible

HMRC confirms that before signing up, you must:

Be registered for Self Assessment
Have submitted a tax return in the last 2 years

You must also meet the income threshold for your start year – April 2026/27 of £50,000+

3. HMRC states you will need

Your Government Gateway user ID and password
Your National Insurance number
Your Self Assessment details

4. Enter Your Personal and Business Details

HMRC will ask you for:

Your full Name
Date of Birth
National Insurance number
Business type (e.g. sole trader / property)
Accounting period dates
The name of your MTD IT software - KEYPrime

HMRC uses these details to confirm eligibility before continuing.

5. Confirm Your Income Sources

For each income stream (self‑employment and/or property), you must confirm:

The type of income
Start dates (if new)
Accounting method (cash or accruals)

6. Submit the Sign‑Up Request

Once all information is entered, submit your application inside the GOV.UK service.

HMRC will process it and send a confirmation email once you are officially signed up.

7. Start Using KEYPrime

Once you receive confirmation, you can begin assigning categories to your digital records.
You can then start submitting your quarterly updates through KEYPrime.