 Renunciation of US citizenship was free until July 2010, at which time a fee of $450 was established.An increase of 422 per cent, to $2,350, effective September 6, 2014, was justified as "reflective of the true cost" of processing.Documentation of a prior relinquishment of US citizenship was free until November 9, 2015 when the renunciation fee of $2,350 was extended to cover all documentation of loss of citizenship.