Get advice on National Insurance if you work offshore
Complete the offshore worker's questionnaire to tell HMRC if you're an offshore worker, seafarer or mariner and to get advice about your National Insurance contributions.
Documents
Details
You should complete the offshore worker’s questionnaire if you are a:
- mariner
- seafarer
- offshore worker
Before you start
You will fill this form in online and you cannot save your progress. It is best to get all of your information together before you start.
What to send HMRC
You’ll need to include copies of any signed contracts and payslips with the questionnaire and post them to the address on the form. Include the following from your discharge book:
- pages 2 and 3
- any pages from the year the questionnaire relates to
You should send any documents you have with the questionnaire, even if you do not have your payslips.
Get help completing the questionnaire
You can phone HMRC if you:
- have any questions about how to complete the questionnaire
- need to send more information for a questionnaire you have already completed
After you’ve submitted your questionnaire
HMRC will contact you after they have reviewed your questionnaire.
Email HMRC to ask for this form in Welsh (Cymraeg).
Updates to this page
-
The postal address for the HMRC mariner's unit has changed.
-
Mariner's questionnaire has been removed.
-
Offshore worker's questionnaire has been added.
-
Postal address for written correspondence to the Marine National Insurance Contributions unit has changed.
-
First published.