Referendums divide the electorate into winners, losers, and abstainers. Research has shown that these three groups tend to differ substantially in their evaluations of the fairness of a referendum. However, no study has investigated the nature and determinants of citizens’ perceptions of the fairness of a national referendum from long before until long after the vote. I address this lacuna by studying perceived fairness of the Brexit referendum using a four-wave panel dataset that tracks perceptions of fairness from before the referendum to 10 months after. The results demonstrate that winners, losers, and abstainers differ significantly in their fairness expectations and fairness evaluations after the vote and that the gap between them widened over time. Strength of identification with the referendum camps substantially moderates perceived fairness. Winners who expected to win did not expect the referendum to be conducted more fairly than winners who expected to lose.