There's also an expatriation tax if your net worth is greater than a certain amount ($2,000,000) or you've averaged over a certain tax liability for the last fi

There's also an expatriation tax if your net worth is greater than a certain amount ($2,000,000) or you've averaged over a certain tax liability for the last five years ($139,000). The tax also applies to pensions, stocks, etc. based on their market value on the day you renounce.