CWF1 - Registering for Self Assessment and National Insurance contributions if you are a self-employed sole trader
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.
Register your business for HMRC taxes
On this page:
Forms
- Form URL
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CWF1 (PDF, 697KB)
- Description
Use form CWF1 to tell HMRC about your self-employment if you can’t register for business taxes online. Fill in the form, print and post it to HMRC. To register online follow the link above.
- 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.
Related forms
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64-8 - Authorising your agent
Use form 64-8 to authorise HMRC to communicate with your tax representative about your tax affairs
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SA400 - Registering a partnership for Self Assessment
Use this form if you need to register a new partnership for Self Assessment
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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
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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
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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.
