CWF1 - Self Assessment and National Insurance contributions - Registration and / or low earnings
If you have a new business, you can use the HMRC tax registration service to register for Self Assessment, instead of downloading a form. It's quicker and easier. Follow the link below.
- Form URL
- CWF1 (PDF, 697KB)
If you’ve registered before and need to re-register (eg you’re starting self-employment again) you can’t register online, But you can register your business by using the form below that sends information securely by email to HMRC. If you use this form you can also apply to HMRC for an exception to Class 2 National Insurance contributions if you are self-employed and your net earnings are below the relevant threshold.
Register by email
If you can’t register for business taxes online or by secure email, use above form CWF1 to tell HMRC about your self-employment. Fill in the form, print and post it to HMRC.
- Use form CWF1 to register for Self Assessment if you can’t register for business taxes online. Complete the form on screen, then print and post it to HMRC.
64-8 - Authorising your agent
Use form 64-8 to authorise HMRC to communicate with your tax representative about your tax affairs
CF10 (2013-14) - Application for exception from liability for Class 2 contributions
Use form CF10 to apply for an exception from Class 2 National Insurance contributions if you are self-employed and your net earnings from self-employment are below the relevant threshold.
SA400 - Registering a partnership for Self Assessment
Use this form if you need to register a new partnership for Self Assessment
SA401 - Registering a partner for Self Assessment and Class 2 NICs
Use this form to register for Self Assessment if you've joined a partnership. It will help get your tax and National Insurance right from the start
SA402 - Registering a partner for Self Assessment if they're not an individual
Use this form if you need to register a partner for Self Assessment that isn't an individual, for example if a company or trust has joined a partnership
SA1 - Registering for Self Assessment and getting a tax return
Registering for Self Assessment
Help with PDF files
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Forms in alternative formats
If you would like an HMRC form in large print, Braille or another alternative format, please contact the relevant HMRC helpline - see the link below.