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Registering for Self Assessment and National Insurance

For self-employed sole traders. Please complete this form so we can register you for Self Assessment and act as your agent. Fields marked * are required.

About you

Have you previously registered for Self Assessment? *
The ten-digit reference number shown on any Self Assessment returns, correspondence or letters.
Mr, Mrs, Miss, Ms, or other title
Are you male or female?
Only if you have lived at your current address for less than three years.
We need this to correspond with you and set up your registration.
Are you a UK resident?
If you are not sure, see gov.uk/tax-foreign-income/residence

About your business

If your business does not have a name, leave this blank.
If you will work as a subcontractor in construction you also need to register for the Construction Industry Scheme (CIS) — see gov.uk/what-is-the-construction-industry-scheme or call the CIS helpline on 0300 200 3210. You still need to complete this form to register as self-employed.
Do you expect your self-employment income to be more than £1,000 a year? *
You must register for Self Assessment if your gross self-employment income is over £1,000 (the trading allowance).
Your best estimate of gross (pre-expenses) income. We use this to assess Making Tax Digital for Income Tax.

Making Tax Digital (MTD) for Income Tax. If your combined self-employment and property income is over £50,000 you must use MTD for Income Tax from 6 April 2026 (over £30,000 from April 2027, over £20,000 from April 2028). We will advise you on MTD-compatible software and digital record-keeping.

Are you a share fisherman?
If your business address is the same as your home address, leave this blank.
Will you be doing all your work for one person or firm?
If so, you may be an employee rather than self-employed. Check your status with HMRC's CEST tool at gov.uk/guidance/check-employment-status-for-tax

Agent authorisation

Do you authorise MCC Partners to register you for Self Assessment and act as your agent? *
We will send you a digital authorisation request to approve.

Declaration

I declare that:

  • the information I have given on this form is correct and complete to the best of my knowledge and belief;
  • I will tell MCC Partners straight away if my Self Assessment or self-employment circumstances change in a way that affects the answers I have given.
Turnstile *