I went s-e about 9 months ago. I looked into all the tax and ni stuff, did whatever I discovered I needed to do, and then filed it in the "dealt with" box in my head. So I've been paying my £27-ish a month and have no particular memory of needing to do anything else ni-specific. If my mental note (and some quick googling) serves me right any additional NI I need to pay will be processed via my tax return. Am I right or am I missing something? I was just talking about it with DH and he seemed to think I should be paying more.