If I earn money in the US, am I supposed to tell the IR and pay UK taxes on it? I am a permanent resident of the UK, but an American citizen. I know I have to report all income, including UK income, to the US (but don't have to pay taxes on it because I am paying taxes here in the UK). But, I want to know if the reverse is true. I am considering selling a website to a buyer in the US. He wants to go through a US broker and pay in US dollars. So, it makes sense for the whole thing to be a US transaction with my US bank account.