SPM190500 | Special cases - foreign-going mariners
From HM Revenue & Customs · Statutory Payments Manual
Mariners are not entitled to SMP/SAP if:
they are employed on board a foreign-going ship and their earnings are paid exclusively for that employment
their employer does not have a place of business in the Great Britain (GB) and Northern Ireland (NI)
have been employed on a foreign-going ship:
within the last 13 weeks, and
remain employed by the same employer, and
are not employed by anybody on terms which would stop them from returning to their employment on the foreign-going ship within13 weeks of leaving it.
Employers of foreign-going mariners pay a special rate of NICs.
Foreign-going mariners are not entitled to SSP if they are:
employed on board a foreign-going ship and their earnings are paid exclusively for that employment, or
employed on board a foreign-going ship and partly elsewhere and the earnings for that employment on the foreign-going ship are paid during that employment, or
employed on board a foreign-going ship within the last 13 weeks, and
remain employed by the same employer, and
are not employed by anybody on terms which would stop them returning to their employment on the foreign-going ship within 13 weeks of leaving it.
Employers of foreign-going mariners are not liable to pay secondary (employer) Class 1 NICs.