NIM16405 | Class 1A National Insurance contributions: Special Class 1A NICs cases: Workers going or coming from abroad who are provided with benefits: Conditions applying to Class 1A NICs liability
From HM Revenue & Customs · National Insurance Manual
If a worker coming from or going abroad is subject to UK NICs legislation, (see NIM16403 for more information), the general rule on liability for Class 1A NICs is that:
Where both of these conditions are satisfied, Class 1A NICs will be due providing the further conditions giving rise to a Class 1A NICs liability are satisfied, see NIM13021.