English translation: General Treasury of the Social Security
Login or register (free and only takes a few minutes) to participate in this question.
You will also have access to many other tools and opportunities designed for those who have language-related jobs (or are passionate about them). Participation is free and the site has a strict confidentiality policy.
swisstell Local time: 16:50 Specializes in field Native speaker of: German PRO pts in category: 122
30 mins confidence:
National Insurance Contributions Office
Explanation: The translation depends on whether you want to 'translate' to an equivalent (UK) situation.
So this is just to offer you another possibility depending on etc.
The Spanish Tesorería etc. is the office you pay your SS to - it covers health insurance AND state pension payments
which is in UK: National Insurance Contributions Office, and the equivalent of the SS number is the NI number.