Use this form if you’re normally self-employed in the UK and going to work temporarily in another country within the European Economic Area (EEA). This form will enable HM Revenue and Customs (HMRC) to determine which member state’s social security legislation will apply.
If you’re a director of your own limited company you should complete forms CA3821 and CA3822.
Use the online form service (sign-in or set up a Government Gateway account)
You may need to give HMRC additional information to support this form.
Fill in and submit this form online but send any additional information to us by post. You’ll be given a unique reference number when you submit the form. Include this number with the additional information you send by post (address below). You can track the progress of the form online using the same reference number.
Before you start using the postal form
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You’ll need to fill in the postal form fully before you can print it. You can’t save a partly completed form so you should gather all your information together before you start to fill it in.