Hi! I've been offered a job in the UK as a secure communications specialist for the next few years, and I'm going to be taking it. However I was wondering how income tax and national insurance worked there - I will be paid into a UK bank and according to this UK tax calculator (UK Income Tax Calculator 2017) I'll be making about £3,500 a month. I'll be working in London, don't think I'll live there but will live not far outside it and commute in.