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Ask HMRC to authorise your employer to pay you without deducting Income Tax.

For this you鈥檒l need a Seafarers鈥� NT tax code to be provisionally entitled to Seafarers鈥� Earnings Deduction (SED) for at least 365 days.

You can either:

• use the online form service
• fill in the form on-screen, print it off and post it to HMRC

To use the online service, you need a Government Gateway user ID and password. If you do not have a user ID, you can create one when you use the service.

If you use the online form, you鈥檒l get a reference number to use to track the progress of your form.

HMRC will consider giving you an NT tax code when you鈥檝e submitted this form and they鈥檝e processed it.

You鈥檒l need:

• your National Insurance number, you can find this on your payslip, P60 or tax return
• your Self Assessment Unique Taxpayer Reference if you have one, you can find this on your tax return, statement of accounts or any other Self Assessment calculations
• employer鈥檚 details including name, PAYE reference, address, date you started the employment, and expected annual earnings

• details of any planned visits to the UK during this period of work on a vessel, including the:

  • visit start and end dates
  • vessel name
  • vessel type
  • official vessel registration number
  • date you think your SED should start

Email HMRC to聽ask for this form in Welsh (Cymraeg).

Before you start using the postal form

If you鈥檙e using an older browser, for example Internet Explorer 8, you鈥檒l need to update it or use a different browser. Find out more about browsers.

You鈥檒l need to fill in the form fully before you can print it. You cannot save a partly completed form so gather all your information together before you begin to fill it in.

Related forms and guidance

Seafarers鈥� Earnings Deduction: tax relief if you work on a ship
If you鈥檙e an employee working at sea outside of the UK check if you can claim tax relief on your earnings.

National Insurance if you work on a ship
Find out about National Insurance if you鈥檙e a mariner (seafarer) so you can pay in the right country and get a refund if you have overpaid.

Income Tax: EEA resident merchant seafarer repayment claim (R43M(SED))
Use form R43M(SED) to claim a tax refund if you鈥檙e a merchant seafarer resident in a European Economic Area State and not ordinarily resident in the UK.